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124 API jobs in The City, City of London + 20 miles
720 exact matches jobs are outside your preferred location
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£45,000 - 55,000 GBP - Onsite WORKING - Location: Stevenage, Cambridge, East of England - United Kingdom Type: Permanent - Data Engineer - Generative AI | Defence Technology - A leading international defence organisation is seeking an experienced Data Engineer with a focus on Generative AI to join their IM GenAI Delivery Office in the UK. You will play a pivotal role in designing, managing, and optimising datasets that support advanced defence systems and critical internal projects. * Develop and maintain robust, secure, and high-integrity datasets for internal defence applications. * Design and optimise data pipelines to ensure reliable, compliant, and scalable solutions. * Apply your expertise in Generative AI, NLP, and OCR to enhance and automate data processes. * Build ETL workflows, APIs, and other data integration solutions tailored for mission-critical environm
£45,000 - 55,000 GBP - Onsite WORKING - Location: Stevenage, Cambridge, East of England - United Kingdom Type: Permanent - Data Engineer - Generative AI | Defence Technology - A leading international defence organisation is seeking an experienced Data Engineer with a focus on Generative AI to join their IM GenAI Delivery Office in the UK. You will play a pivotal role in designing, managing, and optimising datasets that support advanced defence systems and critical internal projects. * Develop and maintain robust, secure, and high-integrity datasets for internal defence applications. * Design and optimise data pipelines to ensure reliable, compliant, and scalable solutions. * Apply your expertise in Generative AI, NLP, and OCR to enhance and automate data processes. * Build ETL workflows, APIs, and other data integration solutions tailored for mission-critical environm
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Software Support Engineer
Software Support Engineer
S-SA Digital Recruitment Ltd
MK41, Bedford
From £32,000 to £38,000 per annum Excellent Benefits
Bedford Hybrid (1 day a week office) £3038k + Benefits UK Only (ILR or above due to clearance) Join a leading SaaS company as a Software Support Engineer, helping customers get the best from their low-code, SaaS platform. Youll be the bridge between development and clients solving issues, supporting workflows, and delivering excellent service. * Software/Application Support experience (or relevant degree) * Knowledge of JavaScript, HTML, CSS, APIs * Strong communication & problem-solving skills * Customer-focused, logical, calm under pressure Nice to have: Low-Code, SaaS, DevOps, ITIL, Software Testing This is an exciting chance to build your career in tech with clear progression in a fast-growing SaaS business, offering hybrid working with 1 day a week in the office. Apply now with your CV for immediate interview!
Bedford Hybrid (1 day a week office) £3038k + Benefits UK Only (ILR or above due to clearance) Join a leading SaaS company as a Software Support Engineer, helping customers get the best from their low-code, SaaS platform. Youll be the bridge between development and clients solving issues, supporting workflows, and delivering excellent service. * Software/Application Support experience (or relevant degree) * Knowledge of JavaScript, HTML, CSS, APIs * Strong communication & problem-solving skills * Customer-focused, logical, calm under pressure Nice to have: Low-Code, SaaS, DevOps, ITIL, Software Testing This is an exciting chance to build your career in tech with clear progression in a fast-growing SaaS business, offering hybrid working with 1 day a week in the office. Apply now with your CV for immediate interview!
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Data Consultant
Data Consultant
Fortice Ltd
London
From £45,000 to £80,000 per annum Open to candidates of all experience
London | Hybrid Working - Chance to join a specialist consultancy working with organisations across the UK Public Sector to deliver impactful digital transformation. We are looking for a talented Data Consultant with hands-on expertise in AWS and Python to join our growing London team. The Role - As a Data Consultant, you will work with public sector clients to design, build and deliver innovative data solutions. Youll help organisations harness their data through scalable cloud platforms, modern data engineering practices, and insightful analytics. This role combines technical delivery with stakeholder engagement, making it ideal for consultants who enjoy bridging the gap between data and strategy. Key Responsibilities * Design and implement data pipelines and architectures in AWS. * Develop solutions using Python for data integration, analysis, and automation.
London | Hybrid Working - Chance to join a specialist consultancy working with organisations across the UK Public Sector to deliver impactful digital transformation. We are looking for a talented Data Consultant with hands-on expertise in AWS and Python to join our growing London team. The Role - As a Data Consultant, you will work with public sector clients to design, build and deliver innovative data solutions. Youll help organisations harness their data through scalable cloud platforms, modern data engineering practices, and insightful analytics. This role combines technical delivery with stakeholder engagement, making it ideal for consultants who enjoy bridging the gap between data and strategy. Key Responsibilities * Design and implement data pipelines and architectures in AWS. * Develop solutions using Python for data integration, analysis, and automation.
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NEW CONTRACT iOS DEVELOPER ROLE AVAILABLE - REMOTE (UK/EU-BASED) * Outside IR35 * 9-12 Month Initial Contract | Start ASAP | Likely Extension - A new contract opportunity for a skilled iOS Developer to build and deploy AI-powered fintech mobile apps. You will work on secure, high-quality solutions while integrating machine learning features such as NLP and recommendation systems. * Develop and deploy iOS apps (Swift / Objective-C, iOS SDK, App Store). * Integrate RESTful APIs and backend services into iOS applications. * Embed AI/ML features (NLP, recommendation engines) into mobile workflows. * Deliver compliant and secure fintech solutions (GDPR, OAuth, encryption). * Experience managing projects end-to-end (greenfield exp.) * Strong expertise in iOS development (Swift / Objective-C, iOS SDK, App Store deployment)
NEW CONTRACT iOS DEVELOPER ROLE AVAILABLE - REMOTE (UK/EU-BASED) * Outside IR35 * 9-12 Month Initial Contract | Start ASAP | Likely Extension - A new contract opportunity for a skilled iOS Developer to build and deploy AI-powered fintech mobile apps. You will work on secure, high-quality solutions while integrating machine learning features such as NLP and recommendation systems. * Develop and deploy iOS apps (Swift / Objective-C, iOS SDK, App Store). * Integrate RESTful APIs and backend services into iOS applications. * Embed AI/ML features (NLP, recommendation engines) into mobile workflows. * Deliver compliant and secure fintech solutions (GDPR, OAuth, encryption). * Experience managing projects end-to-end (greenfield exp.) * Strong expertise in iOS development (Swift / Objective-C, iOS SDK, App Store deployment)
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Front End Games Developer - Hybrid Remote
Front End Games Developer - Hybrid Remote
VERTECH GROUP (UK) LTD
OX4, Oxford
From £55,000 to £75,000 per annum + Bonus + Benefits
Front End Game Developer - Location:Home Based / 1 day per week in Oxford - Salary:Circa 55K 75K + Bonus + Benefits - Senior Front End Games Developerrequired by fast-growing, Top Tech Company! This is a diverse, challenging role in a talented team where youll be building cutting-edge casino slot games, driving feature development, shaping the architecture, and mentoring junior developers * At least 5yrs development experience * Games development experience * Mobile-first mindset * HTML5, TypeScript * PixiJS, Phaser or similar * WebGL or Canvas 2D APIs * Git or similar * Maths, statistics, or physics background * 3D development experience - Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where youll be able to bring ideas, keep up-to-date with the latest technologies and enjoy a healthy work/life balance!
Front End Game Developer - Location:Home Based / 1 day per week in Oxford - Salary:Circa 55K 75K + Bonus + Benefits - Senior Front End Games Developerrequired by fast-growing, Top Tech Company! This is a diverse, challenging role in a talented team where youll be building cutting-edge casino slot games, driving feature development, shaping the architecture, and mentoring junior developers * At least 5yrs development experience * Games development experience * Mobile-first mindset * HTML5, TypeScript * PixiJS, Phaser or similar * WebGL or Canvas 2D APIs * Git or similar * Maths, statistics, or physics background * 3D development experience - Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where youll be able to bring ideas, keep up-to-date with the latest technologies and enjoy a healthy work/life balance!
FEATURED
Senior Full Stack C# .Net Developer - Hybrid Remote
Senior Full Stack C# .Net Developer - Hybrid Remote
VERTECH GROUP (UK) LTD
OX4, Oxford
From £70,000 to £85,000 per annum + Bonus + Benefits
Senior Full Stack C# .Net Developer - Location:Home based / 1 day per month in Oxford - Salary:Circa 70K 85K DOE + Benefits - Senior Full Stack C# .Net Developerrequired by a well-established and fast-growing Top Tech company! This is a varied, challenging role building mission-critical, user-facing applications used at scale. Youll be developing new features, contribute to key technical decisions, and helping to shape the quality of code across the team * At least 5yrs development experience * Experience with high-traffic, responsive apps and sites * Expertise in C# .Net Core * RESTful APIs * TypeScript &JavaScript * Frameworks: Angular, Vue, or React * HTML5 and CSS3 * Familiarity with CI/CD tools * Version control: Git or similar * SQL Server & MySQL - Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where
Senior Full Stack C# .Net Developer - Location:Home based / 1 day per month in Oxford - Salary:Circa 70K 85K DOE + Benefits - Senior Full Stack C# .Net Developerrequired by a well-established and fast-growing Top Tech company! This is a varied, challenging role building mission-critical, user-facing applications used at scale. Youll be developing new features, contribute to key technical decisions, and helping to shape the quality of code across the team * At least 5yrs development experience * Experience with high-traffic, responsive apps and sites * Expertise in C# .Net Core * RESTful APIs * TypeScript &JavaScript * Frameworks: Angular, Vue, or React * HTML5 and CSS3 * Familiarity with CI/CD tools * Version control: Git or similar * SQL Server & MySQL - Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where
FEATURED
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Proven track record in API design and development.
Proven track record in API design and development.
Were looking for an Interim API Integrations Specialist to join our team on an initial 3-month contract with the potential for extension based on project requirements . * Design, develop, and maintain API integrations between internal systems & external SaaS platforms * Build & maintain API documentation & support internal teams with integration best practices * Minimum of 5 years experience in software development or system integration, including at least 2 years in API design, or technical architecture * Strong understanding of cybersecurity principles, data protection, and global compliance, with familiarity in security best practices, common controls, and OAuth2 / API authentication methods * Hands-on experience with RESTful API design and integration, workflow au
Were looking for an Interim API Integrations Specialist to join our team on an initial 3-month contract with the potential for extension based on project requirements . * Design, develop, and maintain API integrations between internal systems & external SaaS platforms * Build & maintain API documentation & support internal teams with integration best practices * Minimum of 5 years experience in software development or system integration, including at least 2 years in API design, or technical architecture * Strong understanding of cybersecurity principles, data protection, and global compliance, with familiarity in security best practices, common controls, and OAuth2 / API authentication methods * Hands-on experience with RESTful API design and integration, workflow au
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As our API Integration Specialist, you will support and help to grow our brand universe. * Around 2-3 years in API integration domain
As our API Integration Specialist, you will support and help to grow our brand universe. * Around 2-3 years in API integration domain
We are looking for a Staff Software Engineer to join Datadog's API Platform group. This team owns the infrastructure and tooling behind our public API surface, which spans more than 7,000 endpoints and supports a vast range of customers and integrations. As a Staff Engineer, you will have the opportunity to contribute to a broad set of projects across multiple teams that support API routing, reliability, web frameworks, and large-scale automation. You will collaborate with teams that build and evolve internal frameworks, traffic shaping and routing logic, reliability tooling, and developer enablement for API infrastructure. * Lead technical direction across multiple teams spanning API routing, rate limiting, frameworks, reliability tooling, and infrastructure automation. * Help define
We are looking for a Staff Software Engineer to join Datadog's API Platform group. This team owns the infrastructure and tooling behind our public API surface, which spans more than 7,000 endpoints and supports a vast range of customers and integrations. As a Staff Engineer, you will have the opportunity to contribute to a broad set of projects across multiple teams that support API routing, reliability, web frameworks, and large-scale automation. You will collaborate with teams that build and evolve internal frameworks, traffic shaping and routing logic, reliability tooling, and developer enablement for API infrastructure. * Lead technical direction across multiple teams spanning API routing, rate limiting, frameworks, reliability tooling, and infrastructure automation. * Help define
Work closely with the team to develop new features, such as better interpretation layers, enhanced data decoding, and improved API coverage for various blockchain data.
Work closely with the team to develop new features, such as better interpretation layers, enhanced data decoding, and improved API coverage for various blockchain data.
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Java Tech Lead Role (2+ years exp in Tech Lead Role) -Java 8+, Spring MVC, SpringBoot, REST API, AWS -Award-Winning UK based FinTech Company -Surrey- Hybrid - 4 days onsite / 1 day WFH -£80,000 - £90,000 (Depending on Experience) I am looking for an Experienced Java Tech Lead who has been leading successful Java teams and is looking for a new challenge - the core tech stack is: Java 8+, Spring MVC, SpringBoot, REST API's and using build tools such as Maven/Gradle.
Java Tech Lead Role (2+ years exp in Tech Lead Role) -Java 8+, Spring MVC, SpringBoot, REST API, AWS -Award-Winning UK based FinTech Company -Surrey- Hybrid - 4 days onsite / 1 day WFH -£80,000 - £90,000 (Depending on Experience) I am looking for an Experienced Java Tech Lead who has been leading successful Java teams and is looking for a new challenge - the core tech stack is: Java 8+, Spring MVC, SpringBoot, REST API's and using build tools such as Maven/Gradle.
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Experience with MuleSoft and API Gateways.
Experience with MuleSoft and API Gateways.
Proficiency as a full stack Software Engineer, including front-end web development (CSS, HTML) and backend API design.
Proficiency as a full stack Software Engineer, including front-end web development (CSS, HTML) and backend API design.
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Experience with Power Automate and API development is a plus.
Experience with Power Automate and API development is a plus.
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Rest API's and Microservice architecture * Restful API Design and development fundamentals * Good SQL knowledge
Rest API's and Microservice architecture * Restful API Design and development fundamentals * Good SQL knowledge
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Rest API's and Microservice architecture * Restful API Design and development fundamentals * Good SQL knowledge
Rest API's and Microservice architecture * Restful API Design and development fundamentals * Good SQL knowledge
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Title: Senior Software Engineer (Driver/API)
Title: Senior Software Engineer (Driver/API)
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REST API development
REST API development
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Background in API design and automated testing frameworks.
Background in API design and automated testing frameworks.
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Hands-on experience integrating external data sources into internal systems using ETL pipelines and API-driven data exchange.
Hands-on experience integrating external data sources into internal systems using ETL pipelines and API-driven data exchange.
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Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
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Knowledge of the following tools Cucumber Godog or other BDD tools Kubernetes Docker Rest Assured Rest or other REST API testing tools Wiremock Mountebank or other HTTP stubbing tools
Knowledge of the following tools Cucumber Godog or other BDD tools Kubernetes Docker Rest Assured Rest or other REST API testing tools Wiremock Mountebank or other HTTP stubbing tools
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4+ years automation testing skills (Selenium, Katalon, GT-UI, GT-API). * Web services testing / API testing skills is a plus.
4+ years automation testing skills (Selenium, Katalon, GT-UI, GT-API). * Web services testing / API testing skills is a plus.
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Experience with API design and development for both internal and external use cases
Experience with API design and development for both internal and external use cases
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