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51 Contract API jobs in Holborn, Central London + 20 miles
205 exact matches jobs are outside your preferred location
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Thales people architect identity management and data protection solutions at the heart of digital security. Business and governments rely on us to bring trust to the billons of digital interactions they have with people. Our technologies and services help banks exchange funds, people cross borders, energy become smarter and much more. More than 30,000 organizations already rely on us to verify the identities of people and things, grant access to digital services, analyze vast quantities of information and encrypt data to make the connected world more secure. Together we offer fantastic opportunities for committed employees to learn and develop their career with us. At Thales UK, we research, develop, and supply technology and services that impact the lives of millions of people each day to make life better, and keep us safer.
Thales people architect identity management and data protection solutions at the heart of digital security. Business and governments rely on us to bring trust to the billons of digital interactions they have with people. Our technologies and services help banks exchange funds, people cross borders, energy become smarter and much more. More than 30,000 organizations already rely on us to verify the identities of people and things, grant access to digital services, analyze vast quantities of information and encrypt data to make the connected world more secure. Together we offer fantastic opportunities for committed employees to learn and develop their career with us. At Thales UK, we research, develop, and supply technology and services that impact the lives of millions of people each day to make life better, and keep us safer.
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Solution Architect - (HCM) SC Cleared
Solution Architect - (HCM) SC Cleared
Henderson Scott
London
£700 - £800 per day + Umbrella rate (inside IR35)
Solution Architect - Active SC Cleared - Location: Hybrid (20% in London or Glasgow) | Engagement: Contract - Inside IR35 | Duration: Initial 6 Months | Clearance: SC Clearance Essential - Our client requires a high-calibre Solution Architect with extensive HCM (Workday / Oracle HCM / Successfactors) experince to establish and deliver the integrations sub-workstream from the ground up. This role is critical for technical readiness, involving the design of integration patterns that will connect the new HCM with crucial internal and external systems across HR, Finance, and Payroll. The Role: End-to-End Integration Strategy & Delivery - You will report directly to the Senior Technical Delivery Manager, acting as the primary authority for all Workday integration design and delivery. * Integration Strategy: Define, develop, and own the Workday integration strategy and road
Solution Architect - Active SC Cleared - Location: Hybrid (20% in London or Glasgow) | Engagement: Contract - Inside IR35 | Duration: Initial 6 Months | Clearance: SC Clearance Essential - Our client requires a high-calibre Solution Architect with extensive HCM (Workday / Oracle HCM / Successfactors) experince to establish and deliver the integrations sub-workstream from the ground up. This role is critical for technical readiness, involving the design of integration patterns that will connect the new HCM with crucial internal and external systems across HR, Finance, and Payroll. The Role: End-to-End Integration Strategy & Delivery - You will report directly to the Senior Technical Delivery Manager, acting as the primary authority for all Workday integration design and delivery. * Integration Strategy: Define, develop, and own the Workday integration strategy and road
FEATURED
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Strong focus on optimizing inference performance and cost (e.g., model compression, quantization, API optimization).
Strong focus on optimizing inference performance and cost (e.g., model compression, quantization, API optimization).
FEATURED
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Secure-Linux tools & API libraries.
Secure-Linux tools & API libraries.
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Job Title:Salesforce Tech Lead - Location:Windsor, UK (1 day a week) Job Purpose and Primary Objectives:Salesforce Tech Lead - Key Responsibilities (Please specify if the position is an individual one or part of a team) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving.
Job Title:Salesforce Tech Lead - Location:Windsor, UK (1 day a week) Job Purpose and Primary Objectives:Salesforce Tech Lead - Key Responsibilities (Please specify if the position is an individual one or part of a team) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving.
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Windsor, UK - Will the role be 100% remote, Hybrid or 100% office? (Mandatory) Hybrid (visit to office once every week) to begin with - Is BGC required to completed before joining?(Y/N) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving. * At least 5+ years Salesforce, both declarative and programmatic * Sales an
Windsor, UK - Will the role be 100% remote, Hybrid or 100% office? (Mandatory) Hybrid (visit to office once every week) to begin with - Is BGC required to completed before joining?(Y/N) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving. * At least 5+ years Salesforce, both declarative and programmatic * Sales an
Play a significant role in the design and development of our full system with embedded HSMs, client-side tools & API libraries * Familiarity with full-stack from device drivers, to client-side tools & API libraries. (Some knowledge of hardware protocols.)
Play a significant role in the design and development of our full system with embedded HSMs, client-side tools & API libraries * Familiarity with full-stack from device drivers, to client-side tools & API libraries. (Some knowledge of hardware protocols.)
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Responsibilities include API development, system integration, dataoptimization, and performance tuning.
Responsibilities include API development, system integration, dataoptimization, and performance tuning.
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Remote Head of AI Software Development - Python, Azure, AI Platform
Remote Head of AI Software Development - Python, Azure, AI Platform
Recruitment Revolution
Reading (RG1), RG1
Competitive Salary Plus Benefits
• Shape the platform architecture, ensuring scalable, secure, cloud-native design across AI, data, and API layers.
• Shape the platform architecture, ensuring scalable, secure, cloud-native design across AI, data, and API layers.
Familiarity with distributed systems and API design
Familiarity with distributed systems and API design
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Knowledge of automation and digital tools such as Dynamo, Power BI, Python, or Revit API is desirable.
Knowledge of automation and digital tools such as Dynamo, Power BI, Python, or Revit API is desirable.
Experience developing a commercial/external software product with external API consumers
Experience developing a commercial/external software product with external API consumers
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In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices
In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices
AWS for underlying infrastructure (Aurora, Redis, Dynamo, S3, SNS, SQS, CloudFront, API Gateway, etc.)
AWS for underlying infrastructure (Aurora, Redis, Dynamo, S3, SNS, SQS, CloudFront, API Gateway, etc.)
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AVEVA is creating software trusted by over 90% of leading industrial companies. Job Title: Senior Software Developer - Location: Cambridge, United Kingdom (Hybrid) Employment Type: Full-time - The job - As part of our Industrial Platform Group, you will join a talented team of software engineers dedicated to designing, developing, and evolving CONNECT - the core industrial intelligence platform at AVEVA. CONNECT powers a diverse range of digital solutions deployed across global industries by AVEVA and our partners. In this role, youll work closely with internal stakeholders and engineering teams to understand requirements, shape system architecture, and deliver scalable platform capabilities. Your contributions will directly impact how CONNECT supports our customers digital transformation journeys and ensures long-term value for partners and the wider AVEVA ecosystem.
AVEVA is creating software trusted by over 90% of leading industrial companies. Job Title: Senior Software Developer - Location: Cambridge, United Kingdom (Hybrid) Employment Type: Full-time - The job - As part of our Industrial Platform Group, you will join a talented team of software engineers dedicated to designing, developing, and evolving CONNECT - the core industrial intelligence platform at AVEVA. CONNECT powers a diverse range of digital solutions deployed across global industries by AVEVA and our partners. In this role, youll work closely with internal stakeholders and engineering teams to understand requirements, shape system architecture, and deliver scalable platform capabilities. Your contributions will directly impact how CONNECT supports our customers digital transformation journeys and ensures long-term value for partners and the wider AVEVA ecosystem.
NEW
Position: Backend Engineer - Location: Remote (UK) Work Type: Contract - Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
Position: Backend Engineer - Location: Remote (UK) Work Type: Contract - Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
FEATURED
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Location/s: London - Recruiter contact: Nikki George - Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices. We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual. Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, youre surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee-owned business, we benefit our clients, our communities, a
Location/s: London - Recruiter contact: Nikki George - Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices. We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual. Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, youre surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee-owned business, we benefit our clients, our communities, a
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Gatwick (1-2 days per week in office) £65-75k + Benefits. Your new company - This leading financial and consulting business are looking to bolster their engineering team with a Senior Full Stack .Net Developer to join their core team of 16 Devs. You will be working in their state-of-the-art offices near to Gatwick/Crawley and will be required to work 1-2 days per week in the office. Your new role - This is a full-stack, full software lifecycle role where Devs are encouraged to bring ideas to the table and challenge the status quo. From architecture and development through to deployment you'll play a key role in building cutting-edge solutions by developing .NET microservices and dynamic Angular front-end applications (we can consider React cross-training to Angular). Working in a collaborative Agile environment, you'll partner with product owners, QA engineers, and fe
Gatwick (1-2 days per week in office) £65-75k + Benefits. Your new company - This leading financial and consulting business are looking to bolster their engineering team with a Senior Full Stack .Net Developer to join their core team of 16 Devs. You will be working in their state-of-the-art offices near to Gatwick/Crawley and will be required to work 1-2 days per week in the office. Your new role - This is a full-stack, full software lifecycle role where Devs are encouraged to bring ideas to the table and challenge the status quo. From architecture and development through to deployment you'll play a key role in building cutting-edge solutions by developing .NET microservices and dynamic Angular front-end applications (we can consider React cross-training to Angular). Working in a collaborative Agile environment, you'll partner with product owners, QA engineers, and fe
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London, UK - Up to £60/hour Outside IR35 - Active SC Clearance required - iO Associates have aligned exclusively with a multi-nation defence alliance to find an MS Dynamics Developer. The ideal candidate would have extensive hands-on experience across the full Dynamics 365 F&O lifecycle, with strong skills in customisation, integrations, automation, Power Platform development, AI-led enhancements, and stakeholder engagement. * Lead customisation, configuration, and enhancement of Dynamics 365 F&O, ensuring scalable, maintainable solutions. * Drive end-to-end delivery across the full ERP lifecycle, including development, integrations, testing, deployment, and post-go-live support. * Build automated workflows and integrations using Power Platform, REST APIs, and low-code tools to improve business processes.
London, UK - Up to £60/hour Outside IR35 - Active SC Clearance required - iO Associates have aligned exclusively with a multi-nation defence alliance to find an MS Dynamics Developer. The ideal candidate would have extensive hands-on experience across the full Dynamics 365 F&O lifecycle, with strong skills in customisation, integrations, automation, Power Platform development, AI-led enhancements, and stakeholder engagement. * Lead customisation, configuration, and enhancement of Dynamics 365 F&O, ensuring scalable, maintainable solutions. * Drive end-to-end delivery across the full ERP lifecycle, including development, integrations, testing, deployment, and post-go-live support. * Build automated workflows and integrations using Power Platform, REST APIs, and low-code tools to improve business processes.
FEATURED
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Our Purpose - Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary - Overview - We are looking for a software engineer to join an award winning team with a proven track record of combining data science techniques with an intimate knowledge of payments data to aid Financial Institutions in their fight against money laundering and fraud. Headquartered in The City of London, we craft bespoke services that help our clien
Our Purpose - Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary - Overview - We are looking for a software engineer to join an award winning team with a proven track record of combining data science techniques with an intimate knowledge of payments data to aid Financial Institutions in their fight against money laundering and fraud. Headquartered in The City of London, we craft bespoke services that help our clien
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Senior Front End Engineer Vue.js
Senior Front End Engineer Vue.js
Client Server
Arundel Heights, Billericay (CM12), CM12 0EQ
£65000 - £75000 per annum
Senior Front End Engineer / Developer (Vue 3) Billericay / WFH to £75k - Are you a JavaScript web technologist seeking an opportunity to work with a modern tech stack on Greenfield projects? You could be progressing your career in a senior, hands-on role at an eCommerce payments solutions provider that has experienced great success in the last year and is growing as a result. As a Senior JavaScript Developer you will take ownership of projects within an Agile development environment, with a focus on Vue 3 front end development to help evolve and scale the existing platforms as well as working on new Greenfield projects; you'll be able to take project ownership and manage all aspects of the frontend stack to produce white labelled Progressive Web Applications and Websites of the highest quality for a broad range of big name retail clients.
Senior Front End Engineer / Developer (Vue 3) Billericay / WFH to £75k - Are you a JavaScript web technologist seeking an opportunity to work with a modern tech stack on Greenfield projects? You could be progressing your career in a senior, hands-on role at an eCommerce payments solutions provider that has experienced great success in the last year and is growing as a result. As a Senior JavaScript Developer you will take ownership of projects within an Agile development environment, with a focus on Vue 3 front end development to help evolve and scale the existing platforms as well as working on new Greenfield projects; you'll be able to take project ownership and manage all aspects of the frontend stack to produce white labelled Progressive Web Applications and Websites of the highest quality for a broad range of big name retail clients.
PREMIUM
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Why Faculty? We established Faculty in 2014 because we thought that AI would be the most important technology of our time. Since then, weve worked with over 350 global customers to transform their performance through human-centric AI. You can read about our real-world impact here. We dont chase hype cycles. We innovate, build and deploy responsible AI which moves the needle - and we know a thing or two about doing it well. We bring an unparalleled depth of technical, product and delivery expertise to our clients who span government, finance, retail, energy, life sciences and defence. Our business, and reputation, is growing fast and were always on the lookout for individuals who share our intellectual curiosity and desire to build a positive legacy through technology. AI is an epoch-defining technology, join a company where youll be empowered to envision its most powe
Why Faculty? We established Faculty in 2014 because we thought that AI would be the most important technology of our time. Since then, weve worked with over 350 global customers to transform their performance through human-centric AI. You can read about our real-world impact here. We dont chase hype cycles. We innovate, build and deploy responsible AI which moves the needle - and we know a thing or two about doing it well. We bring an unparalleled depth of technical, product and delivery expertise to our clients who span government, finance, retail, energy, life sciences and defence. Our business, and reputation, is growing fast and were always on the lookout for individuals who share our intellectual curiosity and desire to build a positive legacy through technology. AI is an epoch-defining technology, join a company where youll be empowered to envision its most powe
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Full Stack .Net Developer (Angular v20/.Net 8 Microservices)
Full Stack .Net Developer (Angular v20/.Net 8 Microservices)
Hays
Gatwick (RH6)
£40000 - £55000 per annum + £40-55k + Benefits
Full Stack .Net Developer (Angular v20 and .NET 8 Microservices) Gatwick (2 days per week in office) £40-55k + Benefits. Your new company - This leading financial and consulting business are looking to bolster their engineering team with a Full Stack .Net Developer to join their core team of 16 Devs. You will be working in their state-of-the-art offices near to Gatwick/Crawley and will be required to work 2 days per week in the office. Your new role - This is a full-stack, full software lifecycle role where Devs are encouraged to bring ideas to the table and challenge the status quo. From architecture and development through to deployment you'll play a key role in building cutting-edge solutions by developing .NET microservices and dynamic Angular front-end applications. Working in a collaborative Agile environment, you'll partner with product owners, QA engineers, an
Full Stack .Net Developer (Angular v20 and .NET 8 Microservices) Gatwick (2 days per week in office) £40-55k + Benefits. Your new company - This leading financial and consulting business are looking to bolster their engineering team with a Full Stack .Net Developer to join their core team of 16 Devs. You will be working in their state-of-the-art offices near to Gatwick/Crawley and will be required to work 2 days per week in the office. Your new role - This is a full-stack, full software lifecycle role where Devs are encouraged to bring ideas to the table and challenge the status quo. From architecture and development through to deployment you'll play a key role in building cutting-edge solutions by developing .NET microservices and dynamic Angular front-end applications. Working in a collaborative Agile environment, you'll partner with product owners, QA engineers, an
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Software Engineer
Software Engineer
EMBL-EBI
Hinxton, Saffron Walden (CB10), CB10 1SD
From £43,015 to £72,738 per annum based on experience and family
We are looking for a Developer with a strong record in software development and interest in developing AI-based systems for one of the most internationally used data resources in biological science, UniProt. Our team is very dynamic and interdisciplinary, comprising talented and enthusiastic software engineers and bioinformaticians working closely together with biologists and scientists. The UniProt resource is one of the most internationally used resources for protein sequence and functional annotation, providing comprehensive, high-quality, and freely accessible data to a large and diverse research community in genomics, proteins and proteomics. As part of the Computational Annotation team in UniProt, you will be working in the design, development and maintenance of systems that automatically assign high-quality functional annotations to millions of unreviewed prote
We are looking for a Developer with a strong record in software development and interest in developing AI-based systems for one of the most internationally used data resources in biological science, UniProt. Our team is very dynamic and interdisciplinary, comprising talented and enthusiastic software engineers and bioinformaticians working closely together with biologists and scientists. The UniProt resource is one of the most internationally used resources for protein sequence and functional annotation, providing comprehensive, high-quality, and freely accessible data to a large and diverse research community in genomics, proteins and proteomics. As part of the Computational Annotation team in UniProt, you will be working in the design, development and maintenance of systems that automatically assign high-quality functional annotations to millions of unreviewed prote
PREMIUM
Software Engineer
Software Engineer
EMBL-EBI
Hinxton, Saffron Walden (CB10), CB10 1SD
From £43,015 to £72,738 per annum based on experience and family
About the Team - We are looking for a Software engineer with strong record in software development and interested in developing services for one of the most internationally used data resources in biological science, UniProt. Our team is very dynamic and interdisciplinary comprising talented and enthusiastic software engineers and bioinformaticians working closely together with biologists and scientists. The UniProt resource is one of the most internationally used protein databases serving a large and diverse research community in genomics, proteins and proteomics. Duties & Responsibilities - As part of your daily work, you will be designing and developing software and APIs for the UniProt data services and website, providing protein information to the scientific community and computational biologists.
About the Team - We are looking for a Software engineer with strong record in software development and interested in developing services for one of the most internationally used data resources in biological science, UniProt. Our team is very dynamic and interdisciplinary comprising talented and enthusiastic software engineers and bioinformaticians working closely together with biologists and scientists. The UniProt resource is one of the most internationally used protein databases serving a large and diverse research community in genomics, proteins and proteomics. Duties & Responsibilities - As part of your daily work, you will be designing and developing software and APIs for the UniProt data services and website, providing protein information to the scientific community and computational biologists.
PREMIUM
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