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37 Contract API jobs in Welwyn Garden City + 20 miles
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A top-tier defense organization is looking for an experienced Axway API Developer / Administrator to join their team on a 6-month contract. * Axway's core products: Policy Studio, API Gateway, and API Manager. If you are an experienced professional with a background in API, MFT, or secure file transfers, this could be the perfect opportunity for you.
A top-tier defense organization is looking for an experienced Axway API Developer / Administrator to join their team on a 6-month contract. * Axway's core products: Policy Studio, API Gateway, and API Manager. If you are an experienced professional with a background in API, MFT, or secure file transfers, this could be the perfect opportunity for you.
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In this critical role, youll develop and maintain REST API over serverless functions using TypeScript; youll also design and implement scalable PostgreSQL schemas and data models. Other organisations may call this role Software Engineer, Software Developer, Back End Software Engineer, Server-Side Developer, Full Stack Developer, or API Developer.
In this critical role, youll develop and maintain REST API over serverless functions using TypeScript; youll also design and implement scalable PostgreSQL schemas and data models. Other organisations may call this role Software Engineer, Software Developer, Back End Software Engineer, Server-Side Developer, Full Stack Developer, or API Developer.
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Azure Solutions Architect Inside IR35
Azure Solutions Architect Inside IR35
Henderson Scott
Euston, NW1 2DU
£700 - £850 per day + INSIDE IR35, Hybrid
Integration design (API standards, naming conventions)
Integration design (API standards, naming conventions)
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API Integration
API Integration
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Champion best practices across testing disciplines including unit, integration, UI, API, and performance * Knowledge of web, mobile, API/microservices testing and contract testing (e.g. PACT)
Champion best practices across testing disciplines including unit, integration, UI, API, and performance * Knowledge of web, mobile, API/microservices testing and contract testing (e.g. PACT)
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QA Specialist - Hybrid Remote
QA Specialist - Hybrid Remote
VERTECH GROUP (UK) LTD
NW3, North West London
From £50,000 to £55,000 per annum + Benefits
Experience with API testing and familiarity with tools like Postman, SoapUI, or similar
Experience with API testing and familiarity with tools like Postman, SoapUI, or similar
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Senior/Lead Full Stack Developer (React / Python) AI Start up!
Senior/Lead Full Stack Developer (React / Python) AI Start up!
Robert Half
EC1, City of London
Negotiable
API & database experience
API & database experience
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Integrate M365 using Graph API, EWS, SOAP, and REST. * Hands-on with Microsoft Graph API, EWS, SOAP, and REST for M365 integration.
Integrate M365 using Graph API, EWS, SOAP, and REST. * Hands-on with Microsoft Graph API, EWS, SOAP, and REST for M365 integration.
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Experience testing interfaces (inbound/outbound), including file-based and API integrations.
Experience testing interfaces (inbound/outbound), including file-based and API integrations.
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Data security, encryption standards, secure API architecture and GDPR compliance
Data security, encryption standards, secure API architecture and GDPR compliance
Strong background in software architecture, microservices, and API design.
Strong background in software architecture, microservices, and API design.
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Senior Data Engineer SQL BigQuery GCP
Senior Data Engineer SQL BigQuery GCP
Client Server
EC2A, City of London
£90000 - £110000 per annum + benefits
Are you a data technologist with Media Streaming experience? You could be progressing your career in a senor, hands-on role at one of Europe's most successful streaming and social media platforms. * Salary to £110k * Employee stock options plan * Flexible vacation and public holidays allowing you 35 days of annual leave * Creativity and Wellness package covering everything from gym memberships, photography, language courses, books * Professional development allowance covering things like books, conferences and training * Remote working most of the time if desired (x1 month in London) * A sociable office environment with free snacks, drinks and lunch if you are in the office - As a Senior Data Engineer you'll design, build and maintain high-performance services for content modelling, serving and integration, develop data pipelines (both batch and streaming) using cloud
Are you a data technologist with Media Streaming experience? You could be progressing your career in a senor, hands-on role at one of Europe's most successful streaming and social media platforms. * Salary to £110k * Employee stock options plan * Flexible vacation and public holidays allowing you 35 days of annual leave * Creativity and Wellness package covering everything from gym memberships, photography, language courses, books * Professional development allowance covering things like books, conferences and training * Remote working most of the time if desired (x1 month in London) * A sociable office environment with free snacks, drinks and lunch if you are in the office - As a Senior Data Engineer you'll design, build and maintain high-performance services for content modelling, serving and integration, develop data pipelines (both batch and streaming) using cloud
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Sr. Network Engineer (Juniper Mist)
Sr. Network Engineer (Juniper Mist)
IO Associates
AL7, Welwyn Garden City
£450 - £500 per day + Outside IR35
Senior Network Engineer - Juniper Mist & AI Specialist - Location: Welwyn Garden City, UK () Type: 6-Month Outside IR35 Contract - Rate: £500 per day - Experience: 7+ years - Join a global technology solutions partner that excels in delivering enterprise-level digital transformation and workflow automation across industries. Renowned for driving operational excellence through advanced IT service management and system integration, this organization partners with clients to enhance performance, streamline processes, and accelerate innovation through cutting-edge cloud and automation platforms. Step into a role where cutting-edge AI meets enterprise networking excellence. We're seeking a seasoned Senior Network Engineer with deep Juniper expertise and a passion for AI-driven network optimisation. This is your chance to shape next-gen connectivity using Mist AI to deliver
Senior Network Engineer - Juniper Mist & AI Specialist - Location: Welwyn Garden City, UK () Type: 6-Month Outside IR35 Contract - Rate: £500 per day - Experience: 7+ years - Join a global technology solutions partner that excels in delivering enterprise-level digital transformation and workflow automation across industries. Renowned for driving operational excellence through advanced IT service management and system integration, this organization partners with clients to enhance performance, streamline processes, and accelerate innovation through cutting-edge cloud and automation platforms. Step into a role where cutting-edge AI meets enterprise networking excellence. We're seeking a seasoned Senior Network Engineer with deep Juniper expertise and a passion for AI-driven network optimisation. This is your chance to shape next-gen connectivity using Mist AI to deliver
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We have a current opportunity for a C# Full Stack Developer on a contract basis at a well known Investment Bank in the City of London. For further information about this position please apply. * Full stack development with a focus on .NET * Proficiency in ASP.NET Core MVC, C#, and Entity Framework * Strong front-end skills in HTML5, CSS3, JavaScript, and modern frameworks (React, Angular, or Vue.js) * Hands-on development experience with SQL Server or other relational databases * Knowledge of SQL programming and ability to write and simplify complex queries, improve query performance, etc. * Design and implement RESTful APIs * Understanding of DevOps practices and CI/CD pipelines * Experience with cloud technologies (AWS, Azure, GCP * Professional Experience working in Investment banking is preferred
We have a current opportunity for a C# Full Stack Developer on a contract basis at a well known Investment Bank in the City of London. For further information about this position please apply. * Full stack development with a focus on .NET * Proficiency in ASP.NET Core MVC, C#, and Entity Framework * Strong front-end skills in HTML5, CSS3, JavaScript, and modern frameworks (React, Angular, or Vue.js) * Hands-on development experience with SQL Server or other relational databases * Knowledge of SQL programming and ability to write and simplify complex queries, improve query performance, etc. * Design and implement RESTful APIs * Understanding of DevOps practices and CI/CD pipelines * Experience with cloud technologies (AWS, Azure, GCP * Professional Experience working in Investment banking is preferred
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Senior Backend Engineer TypeScript Node.js
Senior Backend Engineer TypeScript Node.js
Client Server
EC2A, City of London
£65000 - £80000 per annum + benefits
Senior Backend Engineer / Developer (TypeScript Node.js) Remote UK to £80k - Are you a senior, hands-on Backend Engineer looking for an opportunity to take ownership and progress your career at a scaling tech company? You could be joining a growing games company that combines state of the art technology, gaming and luxury fashion. As a Senior Backend Engineer you'll join the team as they scale the product to support millions of users. You'll design and deliver high-quality, maintainable backend code and features using TypeScript and Node.js that is aligned with established codebase architectural standards and covered by tests as well as supporting backend system performance and reliability, helping to maintain 99% uptime SLA. You'll design, implement and extend robust APIs and microservices supporting gameplay, user management, platform and content management systems,
Senior Backend Engineer / Developer (TypeScript Node.js) Remote UK to £80k - Are you a senior, hands-on Backend Engineer looking for an opportunity to take ownership and progress your career at a scaling tech company? You could be joining a growing games company that combines state of the art technology, gaming and luxury fashion. As a Senior Backend Engineer you'll join the team as they scale the product to support millions of users. You'll design and deliver high-quality, maintainable backend code and features using TypeScript and Node.js that is aligned with established codebase architectural standards and covered by tests as well as supporting backend system performance and reliability, helping to maintain 99% uptime SLA. You'll design, implement and extend robust APIs and microservices supporting gameplay, user management, platform and content management systems,
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CRM Configuration Specialist - Remote UK - Curo, Xplan, Intelligent Office
CRM Configuration Specialist - Remote UK - Curo, Xplan, Intelligent Office
Hireful
Euston, NW1
50 - 60K + Bonus + Equity + 25 Days + 5% Pension + Health
Want to become a go-to CRM configuration specialist, while working remotely with equity upside? Great opportunity to join rapidly growing consultancy delivering to the Wealth Management / IFA space. A company that believes in developing its people and focuses on delivery rather than presenteeism. Role CRM Configuration Specialist aka CRM Consultant, CRM Analyst, Implementation Consultant - Location Remote UK, Flex Start / Finish times - Salary 50 - 60K, Bonus, Equity, 5% Pension, 25 Days, Health plan - We’re seeking a Configuration Specialist to configure and optimise platforms such as Curo Xplan, Intelligent Office or Plannr helping financial services firms streamline operations and deliver impact. * Hands-on experience configuring CRM systems - Ideally in Wealth Management * Strong analytical skills to translate business needs into solutions
Want to become a go-to CRM configuration specialist, while working remotely with equity upside? Great opportunity to join rapidly growing consultancy delivering to the Wealth Management / IFA space. A company that believes in developing its people and focuses on delivery rather than presenteeism. Role CRM Configuration Specialist aka CRM Consultant, CRM Analyst, Implementation Consultant - Location Remote UK, Flex Start / Finish times - Salary 50 - 60K, Bonus, Equity, 5% Pension, 25 Days, Health plan - We’re seeking a Configuration Specialist to configure and optimise platforms such as Curo Xplan, Intelligent Office or Plannr helping financial services firms streamline operations and deliver impact. * Hands-on experience configuring CRM systems - Ideally in Wealth Management * Strong analytical skills to translate business needs into solutions
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Enterprise Solution Architect - London Insurance Markets
Enterprise Solution Architect - London Insurance Markets
Sanderson Recruitment
EC1, City of London
£485 - £950 per day + Umbrella Engagement
Senior Solution Architect / Enterprise Solutuion Architect - Our client operate within the London Market insurance industry, recognised for its innovation, scale, and commitment to digital transformation. The organisation is undertaking a multi-year technology modernisation initiative aimed at enhancing core underwriting, claims, and broking platforms - and this role plays a pivotal part in shaping that future. The Opportunity - We've had a brilliant brief for a Senior Solution / Enterprise Architect to join a well-known brand within the London Market. You'll work closely with the Head of Architecture and a talented team of Enterprise and Senior Solution Architects to help define and evolve the organisation's strategic technology roadmap. This is a software and application-focused role, ideal for someone who brings deep London Market insurance domain expertise and a s
Senior Solution Architect / Enterprise Solutuion Architect - Our client operate within the London Market insurance industry, recognised for its innovation, scale, and commitment to digital transformation. The organisation is undertaking a multi-year technology modernisation initiative aimed at enhancing core underwriting, claims, and broking platforms - and this role plays a pivotal part in shaping that future. The Opportunity - We've had a brilliant brief for a Senior Solution / Enterprise Architect to join a well-known brand within the London Market. You'll work closely with the Head of Architecture and a talented team of Enterprise and Senior Solution Architects to help define and evolve the organisation's strategic technology roadmap. This is a software and application-focused role, ideal for someone who brings deep London Market insurance domain expertise and a s
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Front End Developer
Front End Developer
Sanderson Government and Defence
EC1, City of London
£400 - £500 per day + outside IR35
Details - Clearance required: SC Cleared - IR35 Status: Outside IR35 - Start date: 01/12/2025 - Pay rate: 400-500/d - We are forming a new Data Team to deliver a unified, user-friendly interface that consolidates dashboards, reports, and analytical outputs from across the organisation. This 'single pane of glass' will serve as the central hub for stakeholders to explore data, monitor performance, and make informed decisions. As the Front-End Developer, you will play a pivotal role in designing and building this interface from the ground up. You'll work closely with Data Analysts, Data Scientists, Engineers, and Business Analysts to understand their outputs and translate them into intuitive, dynamic visual experiences. Your work will directly influence how data is consumed and acted upon across the organisation. Responsibilities
Details - Clearance required: SC Cleared - IR35 Status: Outside IR35 - Start date: 01/12/2025 - Pay rate: 400-500/d - We are forming a new Data Team to deliver a unified, user-friendly interface that consolidates dashboards, reports, and analytical outputs from across the organisation. This 'single pane of glass' will serve as the central hub for stakeholders to explore data, monitor performance, and make informed decisions. As the Front-End Developer, you will play a pivotal role in designing and building this interface from the ground up. You'll work closely with Data Analysts, Data Scientists, Engineers, and Business Analysts to understand their outputs and translate them into intuitive, dynamic visual experiences. Your work will directly influence how data is consumed and acted upon across the organisation. Responsibilities
FEATURED
AI Python Developer - Fully Remote
AI Python Developer - Fully Remote
VERTECH GROUP (UK) LTD
N7, North London
From £100,000 to £110,000 per annum + Benefits
AI Python Developer - Location: Fully Remote - Salary: Circa 100K 110K + Benefits - AI Python Developer required by a fast-growing, revolutionary Tech Company! You'll play a key role in integrating AI functionality into production systems, working closely with other developers to deliver scalable, reliable, and well-structured solutions * At least 4 years backend development experience * Strong expertise inPython(FastAPI, Flask, or Django) * Good understanding of backend architecture, APIs, and cloud environments (AWS, Azure, or GCP) * Experience integratingAI or LLM APIsand open-source models into live products * Hands-on experience building or maintainingRetrieval-Augmented Generation (RAG)pipelines - Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where you'll be able to bring ideas, stay up to date with
AI Python Developer - Location: Fully Remote - Salary: Circa 100K 110K + Benefits - AI Python Developer required by a fast-growing, revolutionary Tech Company! You'll play a key role in integrating AI functionality into production systems, working closely with other developers to deliver scalable, reliable, and well-structured solutions * At least 4 years backend development experience * Strong expertise inPython(FastAPI, Flask, or Django) * Good understanding of backend architecture, APIs, and cloud environments (AWS, Azure, or GCP) * Experience integratingAI or LLM APIsand open-source models into live products * Hands-on experience building or maintainingRetrieval-Augmented Generation (RAG)pipelines - Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where you'll be able to bring ideas, stay up to date with
Head of Product - Platform - Digital Channels - FS
Head of Product - Platform - Digital Channels - FS
Sanderson Recruitment
EC1, City of London
£750 - £850 per day
Head of Product / Head of Product Platforms / Head of Digital Product - We're looking for a strategic and delivery-focused Head of Product to lead the ongoing development and optimisation of the organisation's core digital customer platform. This platform serves as a key touchpoint for millions of customers, enabling seamless access to products, services, and personalised experiences across all digital channels. As Head of Product, you will be responsible for defining the vision, driving operational excellence, and ensuring effective leadership across a team of five Senior Product Owners. You'll collaborate closely with engineering, design, data, and commercial teams to deliver a world-class digital experience that strengthens engagement and supports the organisation's strategic objectives. Key Responsibilities - Leadership & Strategy
Head of Product / Head of Product Platforms / Head of Digital Product - We're looking for a strategic and delivery-focused Head of Product to lead the ongoing development and optimisation of the organisation's core digital customer platform. This platform serves as a key touchpoint for millions of customers, enabling seamless access to products, services, and personalised experiences across all digital channels. As Head of Product, you will be responsible for defining the vision, driving operational excellence, and ensuring effective leadership across a team of five Senior Product Owners. You'll collaborate closely with engineering, design, data, and commercial teams to deliver a world-class digital experience that strengthens engagement and supports the organisation's strategic objectives. Key Responsibilities - Leadership & Strategy
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Job Title: AI Engineer (Media) Location: London (Farringdon - 3 days a week onsite) Salary: £55,000 - £70,000 - About Us - We are more than just a media agency; we are people people. At our core lies a commitment to understanding, trust, integrity, and delivering results. With a focus on data-driven decision-making, we have built a reputation for driving tangible outcomes for our clients. As an employee-owned organisation, we value our team members' contributions and provide them with opportunities to shape the company's future. Join us, and let's create meaningful change together. The Role - As an AI Engineer, you will head up the design, build, and optimisation of our data infrastructure, automation solutions, and AI-driven tools. Leading Data Architecture, MarTech, AI & Automation, you will ensure that data flows seamlessly across the business and is harnessed effe
Job Title: AI Engineer (Media) Location: London (Farringdon - 3 days a week onsite) Salary: £55,000 - £70,000 - About Us - We are more than just a media agency; we are people people. At our core lies a commitment to understanding, trust, integrity, and delivering results. With a focus on data-driven decision-making, we have built a reputation for driving tangible outcomes for our clients. As an employee-owned organisation, we value our team members' contributions and provide them with opportunities to shape the company's future. Join us, and let's create meaningful change together. The Role - As an AI Engineer, you will head up the design, build, and optimisation of our data infrastructure, automation solutions, and AI-driven tools. Leading Data Architecture, MarTech, AI & Automation, you will ensure that data flows seamlessly across the business and is harnessed effe
Data Engineer - AI Projects
Data Engineer - AI Projects
Henderson Scott
Stevenage, Hertfordshire, SG1 2DA
£50000.00 - £55000.00 per annum + Bonus, + Substantial Benefits
Data Engineer - Generative AI Projects?? Hybrid | 2-3 Days On-Site | Up to £55,000 + Bonus + Package?? British Citizens Only | BPSS Clearance Required - We're hiring a Data Engineer with a passion for automation, clean pipelines, and the future of AI. This is your chance to shape how data powers Generative AI and NLP tools in a secure, high-tech organisation working on projects that matter. If you're keen to work on innovative internal use-cases - from AI assistants to intelligent search and document automation - this is the perfect next step. What You'll Be Doing * Building and maintaining data pipelines across structured & unstructured sources * Collaborating with internal teams to support Generative AI and NLP projects * Ensuring data is secure, compliant, high-quality, and easy to access * Bringing your ideas to the table as we explore new tools and technologies
Data Engineer - Generative AI Projects?? Hybrid | 2-3 Days On-Site | Up to £55,000 + Bonus + Package?? British Citizens Only | BPSS Clearance Required - We're hiring a Data Engineer with a passion for automation, clean pipelines, and the future of AI. This is your chance to shape how data powers Generative AI and NLP tools in a secure, high-tech organisation working on projects that matter. If you're keen to work on innovative internal use-cases - from AI assistants to intelligent search and document automation - this is the perfect next step. What You'll Be Doing * Building and maintaining data pipelines across structured & unstructured sources * Collaborating with internal teams to support Generative AI and NLP projects * Ensuring data is secure, compliant, high-quality, and easy to access * Bringing your ideas to the table as we explore new tools and technologies
FEATURED
Senior Security Engineer CIAM
Senior Security Engineer CIAM
Sanderson Recruitment
EC1, City of London
£100000 - £120000 per annum + Bonus and benefits
Job Role: Senior Security Engineer - CIAM - Location: Hybrid - City of London - Salary: £100,000 - £120,000 + Bonus - Are you an experienced Security Engineer with a passion for safeguarding systems and driving innovation in identity and access management? Do you thrive in complex environments where you can solve critical security challenges and influence long-term strategy? If you're driven by excellence, collaboration, and the opportunity to make an impact on a global financial institution, this could be the perfect role for you. Join us as a Senior Security Engineer, where you'll help shape a market-leading digital platform and deliver secure, cutting-edge customer experiences. * Strong hands-on expertise with Hardware Security Modules (HSM), AWS Secrets Manager, and certificate lifecycle management (rotation, revocation, automation)
Job Role: Senior Security Engineer - CIAM - Location: Hybrid - City of London - Salary: £100,000 - £120,000 + Bonus - Are you an experienced Security Engineer with a passion for safeguarding systems and driving innovation in identity and access management? Do you thrive in complex environments where you can solve critical security challenges and influence long-term strategy? If you're driven by excellence, collaboration, and the opportunity to make an impact on a global financial institution, this could be the perfect role for you. Join us as a Senior Security Engineer, where you'll help shape a market-leading digital platform and deliver secure, cutting-edge customer experiences. * Strong hands-on expertise with Hardware Security Modules (HSM), AWS Secrets Manager, and certificate lifecycle management (rotation, revocation, automation)
FEATURED
We are delighted to be partnering with a successful technology consultancy that is expanding its Software Development team. This is an excellent opportunity for a proactive and committed Software Developer with expertise in .NET (C# / ASP.NET), modern JavaScript frameworks, and SQL to contribute to impactful projects across a diverse client base. About the role - As a Software Developer, you will be working on the development, and maintenance of their internal software product, ensuring seamless integrations into their clients systems. You'll also get involved with external projects, collaborating closely with clients to understand their needs, and design effective solutions. This role blends hands-on technical work with client interaction, giving you the chance to make a visible impact. Key Responsibilities
We are delighted to be partnering with a successful technology consultancy that is expanding its Software Development team. This is an excellent opportunity for a proactive and committed Software Developer with expertise in .NET (C# / ASP.NET), modern JavaScript frameworks, and SQL to contribute to impactful projects across a diverse client base. About the role - As a Software Developer, you will be working on the development, and maintenance of their internal software product, ensuring seamless integrations into their clients systems. You'll also get involved with external projects, collaborating closely with clients to understand their needs, and design effective solutions. This role blends hands-on technical work with client interaction, giving you the chance to make a visible impact. Key Responsibilities
FEATURED
Applied AI Software Engineer - Python, Fast API, AWS, LLMs - Strong skills with Python & Fast API
Applied AI Software Engineer - Python, Fast API, AWS, LLMs - Strong skills with Python & Fast API