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44 Contract API jobs in Hertfordshire + 20 miles
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Contract Golang Engineer AI for Defence £700800/day | Inside IR35 | Hybrid / Secure Site | SC/DV Cleared | UK Nationals Only - Initial 3-month contract (extensions expected up to 12 months) Join a ground-breaking AI programme delivering national security impact. Were working with a leading UK AI firm on a mission-critical Defence deployment. This greenfield build calls for a Golang specialist to help deliver backend systems that support real-time inference, transcription pipelines, and natural language interaction all under tight performance and security constraints. * Build high-performance services using Golang in secure environments * Develop ingestion and processing pipelines for transcription and structured/unstructured data * Contribute to intelligent data flows including graph-based and RAG inference pipelines
Contract Golang Engineer AI for Defence £700800/day | Inside IR35 | Hybrid / Secure Site | SC/DV Cleared | UK Nationals Only - Initial 3-month contract (extensions expected up to 12 months) Join a ground-breaking AI programme delivering national security impact. Were working with a leading UK AI firm on a mission-critical Defence deployment. This greenfield build calls for a Golang specialist to help deliver backend systems that support real-time inference, transcription pipelines, and natural language interaction all under tight performance and security constraints. * Build high-performance services using Golang in secure environments * Develop ingestion and processing pipelines for transcription and structured/unstructured data * Contribute to intelligent data flows including graph-based and RAG inference pipelines
Front-End Engineer (Contract) Secure AI Systems for Defence - Contract | Inside IR35 | £600£700/day | Hybrid / Secure Site | SC/DV Cleared | UK Nationals Only - Contract Length: Initial 3-month engagement (rolling), part of a 69 month roadmap - Were supporting a cutting-edge AI organisation delivering a government-funded mission into the Defence sector. Theyre seeking a talented Front-End Engineer to help build and iterate on user interfaces that bring complex machine learning outputs to life - transcription analysis, graph-based risk models, and natural-language interfaces for end users in secure, disconnected environments. This is not your typical dashboard gig. Its a chance to design and build offline-first, insight-rich tools that support real-world decision-makingwhere clarity and usability can have operational consequences. o Live and retrospective transcription
Front-End Engineer (Contract) Secure AI Systems for Defence - Contract | Inside IR35 | £600£700/day | Hybrid / Secure Site | SC/DV Cleared | UK Nationals Only - Contract Length: Initial 3-month engagement (rolling), part of a 69 month roadmap - Were supporting a cutting-edge AI organisation delivering a government-funded mission into the Defence sector. Theyre seeking a talented Front-End Engineer to help build and iterate on user interfaces that bring complex machine learning outputs to life - transcription analysis, graph-based risk models, and natural-language interfaces for end users in secure, disconnected environments. This is not your typical dashboard gig. Its a chance to design and build offline-first, insight-rich tools that support real-world decision-makingwhere clarity and usability can have operational consequences. o Live and retrospective transcription
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Programming in Azure / Microsoft capable languages, such as ARM / Bicep, PowerShell, yaml, Python and a understanding of Azure API's from the data plane
Programming in Azure / Microsoft capable languages, such as ARM / Bicep, PowerShell, yaml, Python and a understanding of Azure API's from the data plane
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TDD mindset & solid API design skills
TDD mindset & solid API design skills
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Implement schema registries, data contracts, and API-first data governance.
Implement schema registries, data contracts, and API-first data governance.
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PowerShell scripting and use of Microsoft Graph API
PowerShell scripting and use of Microsoft Graph API
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Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
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AMZN API, VMware automation, Puppet/Chef/Ansible, integration & automation expertise with orchestration
AMZN API, VMware automation, Puppet/Chef/Ansible, integration & automation expertise with orchestration
Hello! At MBC we keep growing and we are now looking for a Software Architect Analyst. About MBC - May Business Consulting is an international consulting firm offering advisory services in digital transformation, change management, efficiency and control. We have a customer-centric approach, getting 100% involved proactively to maximise our added value. We have offices in Spain and the United Kingdom. We work on international projects with financial institutions, fintechs and startups. About the role - We are looking for a Software Architect Analyst a professional who combines technical and analytical skills to design, evaluate and optimise software system architecture. This role is key to ensuring that technological solutions are scalable, secure, efficient and aligned with business goals. It is necessary to have previous experience in banking, especially in payments
Hello! At MBC we keep growing and we are now looking for a Software Architect Analyst. About MBC - May Business Consulting is an international consulting firm offering advisory services in digital transformation, change management, efficiency and control. We have a customer-centric approach, getting 100% involved proactively to maximise our added value. We have offices in Spain and the United Kingdom. We work on international projects with financial institutions, fintechs and startups. About the role - We are looking for a Software Architect Analyst a professional who combines technical and analytical skills to design, evaluate and optimise software system architecture. This role is key to ensuring that technological solutions are scalable, secure, efficient and aligned with business goals. It is necessary to have previous experience in banking, especially in payments
Experience with AWS and GCP cloud security services, including WAF, API gateways, key management services, and secret managers.
Experience with AWS and GCP cloud security services, including WAF, API gateways, key management services, and secret managers.
Lead .NET Engineer (Multi-Stack Oversight)
Lead .NET Engineer (Multi-Stack Oversight)
WITH INTELLIGENCE LIMITED
City of London, London
Competitive
About Us - With Intelligence is a leading provider of data and insights for the global asset management industry. We are scaling up our technological capabilities, harnessing the power of advanced data systems, AI, and modern cloud-based infrastructure to build a flexible, event-driven platform that supports our growing suite of digital products. We're assembling a top-tier London-based engineering team to lead this transformation. This role offers the opportunity to be a key contributor to our technology evolution, leveraging your deep .NET experience to influence product direction, mentor teams, and ensure our systems are robust, scalable, and modern. Role Overview - As a .Net Specialist you will be leading teams in the design, development, and implementation of software solutions using the .NET framework. You will act as a technical authority across multiple produc
About Us - With Intelligence is a leading provider of data and insights for the global asset management industry. We are scaling up our technological capabilities, harnessing the power of advanced data systems, AI, and modern cloud-based infrastructure to build a flexible, event-driven platform that supports our growing suite of digital products. We're assembling a top-tier London-based engineering team to lead this transformation. This role offers the opportunity to be a key contributor to our technology evolution, leveraging your deep .NET experience to influence product direction, mentor teams, and ensure our systems are robust, scalable, and modern. Role Overview - As a .Net Specialist you will be leading teams in the design, development, and implementation of software solutions using the .NET framework. You will act as a technical authority across multiple produc
Join the API Revolution at GraviteeWhere Innovation Meets Growth - Since our beginnings in 2015, Gravitee has grown into a global force, recognized as a 2024 Gartner Magic Quadrant Leader for API Management. What started with four developers challenging the complexities of APIs has evolved into a revolutionary platform powering API and event stream ecosystems worldwide. Be part of a team thats redefining whats possible in API management, and shaping the future of digital transformation. Gravitee.io is taking APIs to the next level we are the premier, open source API platform and we want everyone to know how amazing our software is. * Ability to work for one of the fastest-growing companies and alongside some of the most talented people in the API technology sector
Join the API Revolution at GraviteeWhere Innovation Meets Growth - Since our beginnings in 2015, Gravitee has grown into a global force, recognized as a 2024 Gartner Magic Quadrant Leader for API Management. What started with four developers challenging the complexities of APIs has evolved into a revolutionary platform powering API and event stream ecosystems worldwide. Be part of a team thats redefining whats possible in API management, and shaping the future of digital transformation. Gravitee.io is taking APIs to the next level we are the premier, open source API platform and we want everyone to know how amazing our software is. * Ability to work for one of the fastest-growing companies and alongside some of the most talented people in the API technology sector
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Exposure to CRM platforms and API integrations (e.g. Dynamics 365, Salesforce)
Exposure to CRM platforms and API integrations (e.g. Dynamics 365, Salesforce)
Work directly on the Market Data API, taking ownership around enhancements and liaising with business teams to understand new requirements. * API Knowledge: Understanding of API creation and processes.
Work directly on the Market Data API, taking ownership around enhancements and liaising with business teams to understand new requirements. * API Knowledge: Understanding of API creation and processes.
As an HL7 Integration Analyst, you will be responsible for the development, deployment, analysis, and maintenance of healthcare integration solutions. You will focus on delivering robust interoperability across systems by leveraging standards such as HL7 (v2 and FHIR), Rhapsody Integration Engine, APIs, and custom code solutions. In addition to developing and supporting integration points, you will play a critical role in conducting integration analysis to ensure clinical and operational requirements are accurately interpreted and met through technical delivery. This role requires an exceptionally high level of technical expertise. The post holder is expected to have the skill to routinely analyse and solve highly complex technical problems without the need to call upon others for advice, whilst providing technical guidance and sharing knowledge with other in-house ..
As an HL7 Integration Analyst, you will be responsible for the development, deployment, analysis, and maintenance of healthcare integration solutions. You will focus on delivering robust interoperability across systems by leveraging standards such as HL7 (v2 and FHIR), Rhapsody Integration Engine, APIs, and custom code solutions. In addition to developing and supporting integration points, you will play a critical role in conducting integration analysis to ensure clinical and operational requirements are accurately interpreted and met through technical delivery. This role requires an exceptionally high level of technical expertise. The post holder is expected to have the skill to routinely analyse and solve highly complex technical problems without the need to call upon others for advice, whilst providing technical guidance and sharing knowledge with other in-house ..
Graduate/Junior Web Developer Location: Head Office, The Stables, Chorley, PR7 4AT - A Glimpse into the Role awaiting You - At Glendale we are developing state-of-the-art technology leveraging the use of Google Cloud Platform. Combining, optimising and integrating various Google Cloud services such as Google App Engine, Google Cloud SQL, Google Compute Engine, Google Cloud Storage we have developed multiple solutions to assist all aspects of our business. We are looking for a Graduate / Junior developer to join our team based in our Head Office in Chorley, with the opportunity for hybrid / remote working. This position is a varied role supporting the business in continuously improving efficiency, productivity and safety through the implementation and optimisation of in-house software solutions. We're looking for a graduate or someone who has some programming experienc
Graduate/Junior Web Developer Location: Head Office, The Stables, Chorley, PR7 4AT - A Glimpse into the Role awaiting You - At Glendale we are developing state-of-the-art technology leveraging the use of Google Cloud Platform. Combining, optimising and integrating various Google Cloud services such as Google App Engine, Google Cloud SQL, Google Compute Engine, Google Cloud Storage we have developed multiple solutions to assist all aspects of our business. We are looking for a Graduate / Junior developer to join our team based in our Head Office in Chorley, with the opportunity for hybrid / remote working. This position is a varied role supporting the business in continuously improving efficiency, productivity and safety through the implementation and optimisation of in-house software solutions. We're looking for a graduate or someone who has some programming experienc
At T. Rowe Price, we identify and actively invest in opportunities to help people thrive in an evolving world. As a premier global asset management organization with more than 85 years of experience, we provide investment solutions and a broad range of equity, fixed income, and multi-asset capabilities to individuals, advisors, institutions, and retirement plan sponsors. We take an active, independent approach to investing, offering our dynamic perspective and meaningful partnership so our clients can feel more confident. We believe doing the right thing for our clients and our associates is good business. With a career at the firm, you can expect opportunities to create real impact at work and in your community. Youll enjoy resources to support your career path, as well as compensation, benefits, and flexibility to enrich your life.
At T. Rowe Price, we identify and actively invest in opportunities to help people thrive in an evolving world. As a premier global asset management organization with more than 85 years of experience, we provide investment solutions and a broad range of equity, fixed income, and multi-asset capabilities to individuals, advisors, institutions, and retirement plan sponsors. We take an active, independent approach to investing, offering our dynamic perspective and meaningful partnership so our clients can feel more confident. We believe doing the right thing for our clients and our associates is good business. With a career at the firm, you can expect opportunities to create real impact at work and in your community. Youll enjoy resources to support your career path, as well as compensation, benefits, and flexibility to enrich your life.
2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
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2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
354 exact matches jobs are outside your preferred location
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Senior API Technical Consultant (GraphQL Specialist)
Senior API Technical Consultant (GraphQL Specialist)
Staffworx Limited
London
market rates, outside IR35, 2 days on site
Lead the designand evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. * Expert levelGraphQL, including advanced API design, schema evolution, performance optimisation.
Lead the designand evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. * Expert levelGraphQL, including advanced API design, schema evolution, performance optimisation.
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Azure Analytics & Integration stack (e.g., Databricks, Synapse, Logic Apps, API Management) o API frameworks (SOAP, REST, WebSocket)
Azure Analytics & Integration stack (e.g., Databricks, Synapse, Logic Apps, API Management) o API frameworks (SOAP, REST, WebSocket)
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Strong knowledge of the API/integration lifecycle, including design, deployment, and enhancement. * Expertise in RESTful & SOAP API design, APIM policy, and transformations. * Skilled in API/Integration security protocols & best practices. * Practical experience with Postman, API monitoring, and documentation tools. * Knowledge of Open API Specification, WSDL, SOAP, XSLT. * Application Insight proficiency in .NET and .NET Core (Web, API) and working knowledge of VS Code with Azure.
Strong knowledge of the API/integration lifecycle, including design, deployment, and enhancement. * Expertise in RESTful & SOAP API design, APIM policy, and transformations. * Skilled in API/Integration security protocols & best practices. * Practical experience with Postman, API monitoring, and documentation tools. * Knowledge of Open API Specification, WSDL, SOAP, XSLT. * Application Insight proficiency in .NET and .NET Core (Web, API) and working knowledge of VS Code with Azure.
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Previous work in API integration
Previous work in API integration
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Provide technical direction on MuleSoft integrations and ensure robust API strategy and lifecycle management.
Provide technical direction on MuleSoft integrations and ensure robust API strategy and lifecycle management.
We're looking for a Senior AWS Platform Engineer to play a hands-on role in a major API infrastructure migration project. * Kong API Gateway (hybrid model) * Strong understanding of API gateways (Kong)
We're looking for a Senior AWS Platform Engineer to play a hands-on role in a major API infrastructure migration project. * Kong API Gateway (hybrid model) * Strong understanding of API gateways (Kong)
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