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        169 Contract API jobs in Hertfordshire + 20 miles

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        Senior/Staff Graphics Software Engineer

        ARM
        Cambridge, Cambridgeshire
        Competitive
        Were looking for an enthusiastic Senior/Staff Software Engineer who knows about graphics and GPU drivers, has a curious mind, and a passion for making high-impact products to join the Customer Engineering Team at ARMs GPU Group! In this role you will work on flagship devices with the world's most successful mobile companies. Take the skills you have developed in early engineering career and see them used in a wider business context. Be part of and be well supported by a team of experts! * Developing the high-level graphics APIs of our Mali driver: Vulkan, OpenCL, OpenGL ES, EGL. * Working with some of the biggest names in the consumer electronics space on their latest and greatest platforms. * Integrate and optimise our software into their flagship devices to show the world what Mali can do. * Experienced with graphics APIs such as Vulkan, OpenGL ES, and EGL (Khronos)
        Were looking for an enthusiastic Senior/Staff Software Engineer who knows about graphics and GPU drivers, has a curious mind, and a passion for making high-impact products to join the Customer Engineering Team at ARMs GPU Group! In this role you will work on flagship devices with the world's most successful mobile companies. Take the skills you have developed in early engineering career and see them used in a wider business context. Be part of and be well supported by a team of experts! * Developing the high-level graphics APIs of our Mali driver: Vulkan, OpenCL, OpenGL ES, EGL. * Working with some of the biggest names in the consumer electronics space on their latest and greatest platforms. * Integrate and optimise our software into their flagship devices to show the world what Mali can do. * Experienced with graphics APIs such as Vulkan, OpenGL ES, and EGL (Khronos)
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        FTSE Russell | LSEG Technology - FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a junior software engineer to be part a dynamic team building the distribution capabilities of our index products to the financial community worldwide.
        FTSE Russell | LSEG Technology - FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a junior software engineer to be part a dynamic team building the distribution capabilities of our index products to the financial community worldwide.
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        FTSE Russell | LSEG Technology - FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a senior software engineer to be part a dynamic team of software engineers building all distribution capabilities of our index products to the financial community wor
        FTSE Russell | LSEG Technology - FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a senior software engineer to be part a dynamic team of software engineers building all distribution capabilities of our index products to the financial community wor
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        AEM frontend developer

        Vallum Associates Limited
        London
        From £500 to £600 per day
        Key Responsibilities * AEM Development:Design, develop, and maintainAEM components,templates * Front-End Integration:Collaborate with UX/UI teams to integrate front-end code (HTML, CSS, JavaScript/React/Angular) into AEM for a responsive user experience. * System Integration:Integrate AEM with other core systems and Adobe Experience Cloud products (likeAdobe Analytics,Adobe Target, andAdobe Campaign) using APIs (e.g., RESTful). * Deployment and Support:Participate in the deployment process, conduct unit and system testing, and troubleshoot/debug issues in AEM environments. * Best Practices:Ensure code quality, security, and performance by adhering to AEM and general software development best practices (agile environment).
        Key Responsibilities * AEM Development:Design, develop, and maintainAEM components,templates * Front-End Integration:Collaborate with UX/UI teams to integrate front-end code (HTML, CSS, JavaScript/React/Angular) into AEM for a responsive user experience. * System Integration:Integrate AEM with other core systems and Adobe Experience Cloud products (likeAdobe Analytics,Adobe Target, andAdobe Campaign) using APIs (e.g., RESTful). * Deployment and Support:Participate in the deployment process, conduct unit and system testing, and troubleshoot/debug issues in AEM environments. * Best Practices:Ensure code quality, security, and performance by adhering to AEM and general software development best practices (agile environment).
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        Senior ML Engineer

        Oscar Associates (UK) Limited
        London
        £70000 - £90000 per annum
        Senior Machine Learning Engineer - Salary: £70,000-£90,000 - Location: London (Hybrid) The Opportunity - We're looking for a Senior Machine Learning Engineer to help design, build, and deliver next-generation AI systems. You will work across LLMs, retrieval-augmented generation (RAG), and modern agent frameworks to transform large, unstructured data into meaningful insights and production-ready capabilities. This is a hands-on role within a growing AI team, offering the chance to shape architecture, build scalable pipelines, and ship features that directly impact users. Responsibilities * Develop, integrate, and fine-tune LLMs for natural-language understanding, reasoning, and workflow automation. * Build agentic/LLM-driven workflows for multi-step decision making across diverse data sources. * Architect and deliver ML features such as pattern recognition, entity extr
        Senior Machine Learning Engineer - Salary: £70,000-£90,000 - Location: London (Hybrid) The Opportunity - We're looking for a Senior Machine Learning Engineer to help design, build, and deliver next-generation AI systems. You will work across LLMs, retrieval-augmented generation (RAG), and modern agent frameworks to transform large, unstructured data into meaningful insights and production-ready capabilities. This is a hands-on role within a growing AI team, offering the chance to shape architecture, build scalable pipelines, and ship features that directly impact users. Responsibilities * Develop, integrate, and fine-tune LLMs for natural-language understanding, reasoning, and workflow automation. * Build agentic/LLM-driven workflows for multi-step decision making across diverse data sources. * Architect and deliver ML features such as pattern recognition, entity extr
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        Location: Hybrid / London - Contract: 3 Months initially - Clearance: Active SC clearance required - Ready to take ownership of complex technical delivery in a fast-paced, secure environment? We're looking for a seasoned Technical Delivery Manager who can drive outcomes, unite engineering teams, and keep delivery on track across multiple workstreams. * Lead end-to-end delivery across technical squads, ensuring milestones are hit and risks stay low * Coordinate engineers, architects, and product teams to keep delivery smooth and predictable * Translate technical detail into clear plans, roadmaps, and stakeholder updates * Unblock teams, manage dependencies, and ensure technical decisions support long-term strategy * Own delivery governance in a high-trust, security-focused environment * Proven experience delivering complex technology projects
        Location: Hybrid / London - Contract: 3 Months initially - Clearance: Active SC clearance required - Ready to take ownership of complex technical delivery in a fast-paced, secure environment? We're looking for a seasoned Technical Delivery Manager who can drive outcomes, unite engineering teams, and keep delivery on track across multiple workstreams. * Lead end-to-end delivery across technical squads, ensuring milestones are hit and risks stay low * Coordinate engineers, architects, and product teams to keep delivery smooth and predictable * Translate technical detail into clear plans, roadmaps, and stakeholder updates * Unblock teams, manage dependencies, and ensure technical decisions support long-term strategy * Own delivery governance in a high-trust, security-focused environment * Proven experience delivering complex technology projects
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        FEATURED
        The LSEG DevSecOps Engineering team inside the cyber security division is looking for Senior Software Engineers to build tools and automations to help secure software development for thousands of developers across the group. You will be working as part of a geographically distributed remote team comprising of security engineers and software engineers. Our teams mission is to allow engineers to embed security best practices frictionlessly as part of their day to day work. * Deep understanding of cyber security principles, secure software development, and threat modeling * Experience conducting security assessments, code reviews, and vulnerability management across diverse technology stacks * Experience in building full-stack products (web applications, APIs, CI tooling or low-level software) * Hands-on experience with cloud technologies (AWS, GCP, Azure) and containers
        The LSEG DevSecOps Engineering team inside the cyber security division is looking for Senior Software Engineers to build tools and automations to help secure software development for thousands of developers across the group. You will be working as part of a geographically distributed remote team comprising of security engineers and software engineers. Our teams mission is to allow engineers to embed security best practices frictionlessly as part of their day to day work. * Deep understanding of cyber security principles, secure software development, and threat modeling * Experience conducting security assessments, code reviews, and vulnerability management across diverse technology stacks * Experience in building full-stack products (web applications, APIs, CI tooling or low-level software) * Hands-on experience with cloud technologies (AWS, GCP, Azure) and containers
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        FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a hands-on dynamic software development leader to drive a team of software engineers building robust equity index capabilities and indexes.
        FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a hands-on dynamic software development leader to drive a team of software engineers building robust equity index capabilities and indexes.
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        Role Summary - LSEGs ambition is to be one of the worlds greatest companies and best places to work. To achieve this, we are on a journey of building a world class engineering function supporting our Customer Data Master (CDM) Platform team. The team has embarked on a journey to provide internal teams and platform teams with a fully managed customer data master platform. The role will take part in the definition of the CDM strategy and execution of the CDM engineering strategy and deliver the technology capability, in line with the Corporate Engineering (CE) strategy which includes evolving our current master data capability. What youll be doing * Lead and scale a senior engineering team (currently 5, growing to ~10) to design, build and operate the MDM , CDM and Customer 360 platforms as a product, with clear ownership, measurable outcomes, and a roadmap aligned to b
        Role Summary - LSEGs ambition is to be one of the worlds greatest companies and best places to work. To achieve this, we are on a journey of building a world class engineering function supporting our Customer Data Master (CDM) Platform team. The team has embarked on a journey to provide internal teams and platform teams with a fully managed customer data master platform. The role will take part in the definition of the CDM strategy and execution of the CDM engineering strategy and deliver the technology capability, in line with the Corporate Engineering (CE) strategy which includes evolving our current master data capability. What youll be doing * Lead and scale a senior engineering team (currently 5, growing to ~10) to design, build and operate the MDM , CDM and Customer 360 platforms as a product, with clear ownership, measurable outcomes, and a roadmap aligned to b
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        ££60,000 - £110,000 GBP + Package - Hybrid WORKING - Location: London;Cheltenham;Bournemouth, Central London, Greater London - United Kingdom Type: Permanent - Location: Cheltenham, London, Bournemouth - Consultative travel required - Clearance: Must be a sole British National, elligable or holding SC or DV - Salary: £60,000 - £110,000 (Depandant on grade) A leading digital consultancy is looking for a Senior Data Scientist to lead and deliver cutting-edge AI/ML solutions for clients across UK defence and public sector. This is a hands-on, strategic position for someone who thrives at the intersection of data science, client delivery, and software product design. What You'll Be Doing * Lead technical project delivery and shape data science strategy across multiple client engagements * Define and implement bespoke machine learning algorithms to solve real-world defence
        ££60,000 - £110,000 GBP + Package - Hybrid WORKING - Location: London;Cheltenham;Bournemouth, Central London, Greater London - United Kingdom Type: Permanent - Location: Cheltenham, London, Bournemouth - Consultative travel required - Clearance: Must be a sole British National, elligable or holding SC or DV - Salary: £60,000 - £110,000 (Depandant on grade) A leading digital consultancy is looking for a Senior Data Scientist to lead and deliver cutting-edge AI/ML solutions for clients across UK defence and public sector. This is a hands-on, strategic position for someone who thrives at the intersection of data science, client delivery, and software product design. What You'll Be Doing * Lead technical project delivery and shape data science strategy across multiple client engagements * Define and implement bespoke machine learning algorithms to solve real-world defence
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        PREMIUM
        Sanderson are working closely with a SME based in the London who are looking to grow their Java Developer capability. The company are looking to modernise how organisations manage and derive data. They are fast growing and looking for dynamics people to help them grow the business and capability. * Strong experience in Java software engineering. Experience with Spring Boot, REST APIs, and microservice architectures * Knowledge of Docker and Kubernetes for containerisation * Exposure to cloud platforms such as AWS - This role will require eligibility to be clearable to SC level. If you're interested in the above, apply or reach out to - Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives.
        Sanderson are working closely with a SME based in the London who are looking to grow their Java Developer capability. The company are looking to modernise how organisations manage and derive data. They are fast growing and looking for dynamics people to help them grow the business and capability. * Strong experience in Java software engineering. Experience with Spring Boot, REST APIs, and microservice architectures * Knowledge of Docker and Kubernetes for containerisation * Exposure to cloud platforms such as AWS - This role will require eligibility to be clearable to SC level. If you're interested in the above, apply or reach out to - Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives.
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        FEATURED
        Fuse are working with a global FTSE 250 organisation to recruti a Full Stack Developer into the team. You would play a key role in building and optimising cloud-based applications on Microsoft Azure. This is an exciting opportunity to work on transformative projects across the EME region. * Design, develop and maintain .NET Core and ASP.NET applications on Azure * Build and integrate RESTful APIs and microservices * Collaborate with architects and stakeholders to deliver scalable, secure solutions * Implement DevOps practices with CI/CD pipelines using Azure DevOps * Ensure performance, security and code quality standards are met * 5+ years' experience in .NET development * Strong knowledge of Azure services and cloud architecture * Proficiency with DevOps tools (Azure DevOps, Git) * Solid understanding of APIs, SQL/NoSQL databases and Agile methodologies
        Fuse are working with a global FTSE 250 organisation to recruti a Full Stack Developer into the team. You would play a key role in building and optimising cloud-based applications on Microsoft Azure. This is an exciting opportunity to work on transformative projects across the EME region. * Design, develop and maintain .NET Core and ASP.NET applications on Azure * Build and integrate RESTful APIs and microservices * Collaborate with architects and stakeholders to deliver scalable, secure solutions * Implement DevOps practices with CI/CD pipelines using Azure DevOps * Ensure performance, security and code quality standards are met * 5+ years' experience in .NET development * Strong knowledge of Azure services and cloud architecture * Proficiency with DevOps tools (Azure DevOps, Git) * Solid understanding of APIs, SQL/NoSQL databases and Agile methodologies
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        FEATURED
        Rate - £500 / £525 Outside IR35 - Duration - 3 months - Location - Fully remote - Sanderson is currently working with an organisation who require a D365 Business Central/Shopify Support Engineer to bridge ERP and e-commerce platforms, ensuring seamless integration, smooth operations and excellent support for business users. The ideal candidate will have strong technical expertise, problem solving skills and a customer focused mindset. Key Responsibilities * Provide technical support for Microsoft Dynamics 365 Business Central and Shopify platforms * Troubleshoot and resolve issues related to system integrations, data synchronisation and workflows * Liaise with support partners for issues that require 2nd/ 3rd line support and coordinate activities between partners where required * Collaborate with internal teams to analyse business requirements and implement solutions
        Rate - £500 / £525 Outside IR35 - Duration - 3 months - Location - Fully remote - Sanderson is currently working with an organisation who require a D365 Business Central/Shopify Support Engineer to bridge ERP and e-commerce platforms, ensuring seamless integration, smooth operations and excellent support for business users. The ideal candidate will have strong technical expertise, problem solving skills and a customer focused mindset. Key Responsibilities * Provide technical support for Microsoft Dynamics 365 Business Central and Shopify platforms * Troubleshoot and resolve issues related to system integrations, data synchronisation and workflows * Liaise with support partners for issues that require 2nd/ 3rd line support and coordinate activities between partners where required * Collaborate with internal teams to analyse business requirements and implement solutions
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        FEATURED

        Product Owner - Shopify

        INFUSED SOLUTIONS LIMITED
        London
        £400 - £500 per day + market rate
        We are seeking a skilled and motivated Product Owner with hands-on experience in Shopify and e-commerce to join a rapidly expanding client. This is an exciting opportunity for a driven professional to take ownership of our platforms and contribute to the growth and innovation of our digital business. Key Responsibilities * Lead the development and enhancement of Shopify-based e-commerce solutions. * Define and prioritise product features, ensuring alignment with business goals and customer needs. * Collaborate with cross-functional teams, including development, design, marketing, and sales, to deliver best-in-class digital experiences. * Analyse market trends and customer feedback to inform product strategy and roadmap. * Oversee the product lifecycle, from inception through launch and ongoing optimisation.
        We are seeking a skilled and motivated Product Owner with hands-on experience in Shopify and e-commerce to join a rapidly expanding client. This is an exciting opportunity for a driven professional to take ownership of our platforms and contribute to the growth and innovation of our digital business. Key Responsibilities * Lead the development and enhancement of Shopify-based e-commerce solutions. * Define and prioritise product features, ensuring alignment with business goals and customer needs. * Collaborate with cross-functional teams, including development, design, marketing, and sales, to deliver best-in-class digital experiences. * Analyse market trends and customer feedback to inform product strategy and roadmap. * Oversee the product lifecycle, from inception through launch and ongoing optimisation.
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        AI Engineer

        Sanderson Recruitment
        London
        £70000 - £80000 per annum + Benefits
        Job Role: AI Engineer - Working Model: Permanent - Location: Hybrid - London - Salary: Up to £80,000 + Benefits - Are you a hands-on AI engineer looking to build, deploy, and optimize AI-driven solutions? Do you want to work with Generative AI, LLMs, and cloud deployments in a collaborative, fast-moving environment? This is an exciting opportunity to join a growing AI team, contribute to cutting-edge projects, and develop your skills with mentorship from senior engineers. You'll work on AI-powered applications, RAG pipelines, and model fine-tuning, solving real business problems. About the Role * Design, implement, and fine-tune LLMs and generative AI solutions (OpenAI, Anthropic Claude, Gemini, open-source models) * Build and optimize RAG pipelines, vector databases, and prompt engineering strategies * Develop AI-powered applications integrating LLMs with APIs, agent
        Job Role: AI Engineer - Working Model: Permanent - Location: Hybrid - London - Salary: Up to £80,000 + Benefits - Are you a hands-on AI engineer looking to build, deploy, and optimize AI-driven solutions? Do you want to work with Generative AI, LLMs, and cloud deployments in a collaborative, fast-moving environment? This is an exciting opportunity to join a growing AI team, contribute to cutting-edge projects, and develop your skills with mentorship from senior engineers. You'll work on AI-powered applications, RAG pipelines, and model fine-tuning, solving real business problems. About the Role * Design, implement, and fine-tune LLMs and generative AI solutions (OpenAI, Anthropic Claude, Gemini, open-source models) * Build and optimize RAG pipelines, vector databases, and prompt engineering strategies * Develop AI-powered applications integrating LLMs with APIs, agent
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        FEATURED

        AI Lead

        Sanderson Recruitment
        London
        £95000 - £100000 per annum + benefits
        Job Role: AI Lead - Working Model: Permanent - Location: Hybrid - London - Salary: up to £100,000 - Are you a hands-on AI Lead passionate about Generative AI, LLMs, and cloud deployments? Do you enjoy designing, developing, and deploying AI-driven solutions that solve real business problems? This is an exciting opportunity to join a dynamic AI team and contribute to cutting-edge projects in Insurtech and Fintech. You'll work closely with cross-functional teams to build scalable AI applications, fine-tune LLMs, and integrate AI capabilities across platforms. About the Role * Lead the design, implementation, and fine-tuning of LLMs and generative AI solutions (OpenAI, Anthropic Claude, Gemini, open-source models). * Build and optimize RAG pipelines, vector databases, and prompt engineering strategies. * Develop AI-powered applications integrating LLMs with APIs, agents,
        Job Role: AI Lead - Working Model: Permanent - Location: Hybrid - London - Salary: up to £100,000 - Are you a hands-on AI Lead passionate about Generative AI, LLMs, and cloud deployments? Do you enjoy designing, developing, and deploying AI-driven solutions that solve real business problems? This is an exciting opportunity to join a dynamic AI team and contribute to cutting-edge projects in Insurtech and Fintech. You'll work closely with cross-functional teams to build scalable AI applications, fine-tune LLMs, and integrate AI capabilities across platforms. About the Role * Lead the design, implementation, and fine-tuning of LLMs and generative AI solutions (OpenAI, Anthropic Claude, Gemini, open-source models). * Build and optimize RAG pipelines, vector databases, and prompt engineering strategies. * Develop AI-powered applications integrating LLMs with APIs, agents,
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        FEATURED
        Expertise in Pentaho Data Integration for ETL processes. Strong understanding of data warehousing concepts, data modelling, and schema design. Experience with other ETL tools (Informatica, Talend, SSIS) is a plus. Advanced SQL for querying and data manipulation. Familiarity with Java, Python, or VBA for scripting and automation. Knowledge of RESTful APIs and various database systems. Skills in data profiling, data analysis, and ensuring data quality. Experience 612 years in Data Integration and ETL development. Minimum 35 years of hands-on Pentaho experience. Leading complex ETL projects and working with cross-functional teams. Exposure to Banking/Financial Services domain is a plus. Preferred Qualifications Certifications in Pentaho, Big Data, or Cloud Platforms (AWS/GCP/Azure). Experience with Big Data technologies (Hadoop, Spark) and cloud data services.
        Expertise in Pentaho Data Integration for ETL processes. Strong understanding of data warehousing concepts, data modelling, and schema design. Experience with other ETL tools (Informatica, Talend, SSIS) is a plus. Advanced SQL for querying and data manipulation. Familiarity with Java, Python, or VBA for scripting and automation. Knowledge of RESTful APIs and various database systems. Skills in data profiling, data analysis, and ensuring data quality. Experience 612 years in Data Integration and ETL development. Minimum 35 years of hands-on Pentaho experience. Leading complex ETL projects and working with cross-functional teams. Exposure to Banking/Financial Services domain is a plus. Preferred Qualifications Certifications in Pentaho, Big Data, or Cloud Platforms (AWS/GCP/Azure). Experience with Big Data technologies (Hadoop, Spark) and cloud data services.
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        Technical Lead

        83zero Limited
        London
        £90000 - £110000 per annum + Plus benefits
        83zero is proud to partner with a high-growth startup that's redefining the B2B2C social media space. They're building a next-generation Platform-as-a-Service already making waves across global media ecosystems - and now they need a DevOps Leader to help scale it to the next level. Why This Role? This isn't just another leadership position. You'll own the technical vision for a serverless, event-driven, globally distributed platform on AWS. You'll lead a talented, distributed engineering team, shape high-performance APIs, and build systems that scale fast and run clean. What's On Offer * Competitive salary + performance bonus * Meaningful equity - build it, own it, grow with it * Hybrid/remote-first working culture * A seat at the decision-making table in a fast-scaling SaaS business * Real autonomy, rapid progression, and zero bureaucracy
        83zero is proud to partner with a high-growth startup that's redefining the B2B2C social media space. They're building a next-generation Platform-as-a-Service already making waves across global media ecosystems - and now they need a DevOps Leader to help scale it to the next level. Why This Role? This isn't just another leadership position. You'll own the technical vision for a serverless, event-driven, globally distributed platform on AWS. You'll lead a talented, distributed engineering team, shape high-performance APIs, and build systems that scale fast and run clean. What's On Offer * Competitive salary + performance bonus * Meaningful equity - build it, own it, grow with it * Hybrid/remote-first working culture * A seat at the decision-making table in a fast-scaling SaaS business * Real autonomy, rapid progression, and zero bureaucracy
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        We are looking for Developers to build powerful solutions across Salesforce, SFI Insurance Cloud, and Omnistudio. Lead Salesforce & SFI Insurance Cloud implementations Build with OmniStudio (DataRaptor, FlexCards, OmniScript) Guide teams & work directly with clients Drive end-to-end solution design, delivery & integration 5+ yrs experience (Salesforce + SFI) Strong LWC, Apex, APIs, Agile background Insurance Cloud expertise (Quoting, Policy Admin, FNOL, Claims) Salesforce & SFI certifications Excellent communication + leadership skills If you're a tech leader ready to deliver innovative cloud solutions, we want to meet you!
        We are looking for Developers to build powerful solutions across Salesforce, SFI Insurance Cloud, and Omnistudio. Lead Salesforce & SFI Insurance Cloud implementations Build with OmniStudio (DataRaptor, FlexCards, OmniScript) Guide teams & work directly with clients Drive end-to-end solution design, delivery & integration 5+ yrs experience (Salesforce + SFI) Strong LWC, Apex, APIs, Agile background Insurance Cloud expertise (Quoting, Policy Admin, FNOL, Claims) Salesforce & SFI certifications Excellent communication + leadership skills If you're a tech leader ready to deliver innovative cloud solutions, we want to meet you!
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        WordPress Developer

        C&C Consulting Limited
        Colchester (CO2)
        From £35,000 to £50,000 per annum
        This leading creative marketing agency is looking for a WordPress Developer to work with cutting-edge WordPress technologies, in a fast-growing agency environment. You will be developing custom WordPress themes and plugins from scratch; Maintaining and enhancing existing WordPress websites; Implementing responsive designs that work across all devices and browsers Experience necessary - * 3+ years WordPress development experience * Experience of PHP 8.2+ and object-oriented programming and MySQL/MariaDB experience * GitHub/BitBucket * WordPress REST APIs, hooks and filters. * Experience with the Gutenberg Block Editor would be superb. * SASS/SCSS preprocessors * Build tools i.e. Webpack, Gulp, or similar * WordPress CLI (WP-CLI)
        This leading creative marketing agency is looking for a WordPress Developer to work with cutting-edge WordPress technologies, in a fast-growing agency environment. You will be developing custom WordPress themes and plugins from scratch; Maintaining and enhancing existing WordPress websites; Implementing responsive designs that work across all devices and browsers Experience necessary - * 3+ years WordPress development experience * Experience of PHP 8.2+ and object-oriented programming and MySQL/MariaDB experience * GitHub/BitBucket * WordPress REST APIs, hooks and filters. * Experience with the Gutenberg Block Editor would be superb. * SASS/SCSS preprocessors * Build tools i.e. Webpack, Gulp, or similar * WordPress CLI (WP-CLI)
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        Rate - £475 - £500 Outside IR35 - Duration - 3 months - Location - Fully remote - We're seeking a Business Central and Shopify Support Engineer to join a client of ours growing at a substantial rate! This role bridges ERP and e-commerce platforms, ensuring seamless integration, smooth operations and excellent support for our business users. The ideal candidate will have strong technical expertise, problem solving skills and a customer focused mindset. Key Responsibilities * Provide technical support for Microsoft Dynamics 365 Business Central and Shopify platforms * Troubleshoot and resolve issues related to system integration's, data synchronisation and workflows * Liaise with support partners for issues that require 2nd/ 3rd line support and coordinate activities between partners where required * Collaborate with internal teams to analyse business requirements and i
        Rate - £475 - £500 Outside IR35 - Duration - 3 months - Location - Fully remote - We're seeking a Business Central and Shopify Support Engineer to join a client of ours growing at a substantial rate! This role bridges ERP and e-commerce platforms, ensuring seamless integration, smooth operations and excellent support for our business users. The ideal candidate will have strong technical expertise, problem solving skills and a customer focused mindset. Key Responsibilities * Provide technical support for Microsoft Dynamics 365 Business Central and Shopify platforms * Troubleshoot and resolve issues related to system integration's, data synchronisation and workflows * Liaise with support partners for issues that require 2nd/ 3rd line support and coordinate activities between partners where required * Collaborate with internal teams to analyse business requirements and i
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        FEATURED
        AI Developer - Generative AI Specialist - 3 months+ - Hybrid - Rate circa £500-£650 - We are looking for an experienced AI Developer to join a team developing cutting edge AI solutions who will either have current and active SC clearance or have the ability to be able to obtain SC clearance. You will provide solutions across both Azure and AWS technologies and importantly have a demonstrable background in C#.Net . This will be a very much collaborative role working with a range of domain experts. Being the AI SME you will provide technical expertise on GenAI capabilities and its limitations to the non-technical people. What you will bring to the team * Fine-tune Large Language Models (LLMs) and other generative architectures. * Optimise pre-trained models (OpenAI, Anthropic, or open-source LLMs) for business use cases using prompt engineering and reinforcement learnin
        AI Developer - Generative AI Specialist - 3 months+ - Hybrid - Rate circa £500-£650 - We are looking for an experienced AI Developer to join a team developing cutting edge AI solutions who will either have current and active SC clearance or have the ability to be able to obtain SC clearance. You will provide solutions across both Azure and AWS technologies and importantly have a demonstrable background in C#.Net . This will be a very much collaborative role working with a range of domain experts. Being the AI SME you will provide technical expertise on GenAI capabilities and its limitations to the non-technical people. What you will bring to the team * Fine-tune Large Language Models (LLMs) and other generative architectures. * Optimise pre-trained models (OpenAI, Anthropic, or open-source LLMs) for business use cases using prompt engineering and reinforcement learnin
        more
        Technically sharpAI Prompt Engineer - Youll design and optimize prompts, build LLM-powered applications, and deploy scalable GenAI solutions that connect people and intelligent systems in new ways. What Youll Do * Design, test, and refine prompts for leading LLMs (GPT-4/5, Claude, Gemini, Mistral, LLaMA, Cohere). * Experiment with advanced prompting techniques; Chain-of-Thought, ReAct, Tree-of-Thoughts, and more. * Deploy AI/ML pipelines using Azure ML, AWS SageMaker, Vertex AI, or Databricks. * Integrate LLMs into production apps using LangChain, LlamaIndex, and RAG architectures. * Build APIs and microservices for scalable AI deployment. * Use AI-powered dev tools like GitHub Copilot, Cursor, and Codeium to speed up iteration. * Apply MLOps/LLMOps practices with MLflow, Weights & Biases, and Kubeflow. Youll Bring
        Technically sharpAI Prompt Engineer - Youll design and optimize prompts, build LLM-powered applications, and deploy scalable GenAI solutions that connect people and intelligent systems in new ways. What Youll Do * Design, test, and refine prompts for leading LLMs (GPT-4/5, Claude, Gemini, Mistral, LLaMA, Cohere). * Experiment with advanced prompting techniques; Chain-of-Thought, ReAct, Tree-of-Thoughts, and more. * Deploy AI/ML pipelines using Azure ML, AWS SageMaker, Vertex AI, or Databricks. * Integrate LLMs into production apps using LangChain, LlamaIndex, and RAG architectures. * Build APIs and microservices for scalable AI deployment. * Use AI-powered dev tools like GitHub Copilot, Cursor, and Codeium to speed up iteration. * Apply MLOps/LLMOps practices with MLflow, Weights & Biases, and Kubeflow. Youll Bring
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        Full Stack Developer

        Platform Recruitment Limited
        Reading (RG1)
        From £40,000 to £70,000 per annum
        Software Engineer Robotics & Industrial AI Platform - Location:Reading (Hybrid, 23 days onsite) Salary:£40,000£70,000 DOE - An exciting opportunity for a Software Engineer to join a growing tech company developing a cloud platform used to manage autonomous robotic inspections and transform sensor data into actionable insights for industrial clients. Youll work across backend, frontend, and data services, contributing to new features, improving existing systems, and supporting integrations with robotics and AI tools. Ideal for someone with 23 years experience who wants to develop full-stack skills and work with cutting-edge technologies. * Develop features across backend and frontend systems * Build and maintain APIs, data pipelines, and UI components * Write clean, maintainable code following best practices * Support cloud deployment (AWS experience beneficial)
        Software Engineer Robotics & Industrial AI Platform - Location:Reading (Hybrid, 23 days onsite) Salary:£40,000£70,000 DOE - An exciting opportunity for a Software Engineer to join a growing tech company developing a cloud platform used to manage autonomous robotic inspections and transform sensor data into actionable insights for industrial clients. Youll work across backend, frontend, and data services, contributing to new features, improving existing systems, and supporting integrations with robotics and AI tools. Ideal for someone with 23 years experience who wants to develop full-stack skills and work with cutting-edge technologies. * Develop features across backend and frontend systems * Build and maintain APIs, data pipelines, and UI components * Write clean, maintainable code following best practices * Support cloud deployment (AWS experience beneficial)
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        Job Title: Marketing Automation & AI Engineer (Remote) Salary: £70k open to negotiation DOE - Location: Remote-first role with a preference for London proximity - A fast-growing B2B FinTech scale-up (modular banking & payments infrastructure) is building a brand-new function at the intersection of Marketing, AI, and Automation, and they're looking for the engineer who will help shape it from day one. What You'll Work On * Architect and optimise n8n / Zapier / Make workflows that power the marketing engine * Build AI-driven agents, automations, and internal tools that improve traffic, conversions, and lead flow * Turn insights ? hypotheses ? experiments ? measurable outcomes * Spot signals in noisy data and connect them into actionable patterns * Explore emerging AI/automation tools and apply them to real go-to-market systems
        Job Title: Marketing Automation & AI Engineer (Remote) Salary: £70k open to negotiation DOE - Location: Remote-first role with a preference for London proximity - A fast-growing B2B FinTech scale-up (modular banking & payments infrastructure) is building a brand-new function at the intersection of Marketing, AI, and Automation, and they're looking for the engineer who will help shape it from day one. What You'll Work On * Architect and optimise n8n / Zapier / Make workflows that power the marketing engine * Build AI-driven agents, automations, and internal tools that improve traffic, conversions, and lead flow * Turn insights ? hypotheses ? experiments ? measurable outcomes * Spot signals in noisy data and connect them into actionable patterns * Explore emerging AI/automation tools and apply them to real go-to-market systems
        more

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        What is the average salary for API in Hertfordshire?

        Average salary per year
        £62,499

        The average salary for a API in Hertfordshire is £62,499. API in Hertfordshire salaries range from £47,499 to £67,499.

        Frequently Asked Questions

        How many contract API jobs are there in Hertfordshire?
        There are 169 contract API jobs within 20 miles of Hertfordshire available on CWJobs right now.

        What other similar jobs are there to contract API jobs in Hertfordshire?
        As well as contract API jobs in Hertfordshire, you can find contract Qa Automation, Quality Assurance, QA Analyst, amongst many others.