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6 Permanent API jobs in Chelmsford + 20 miles
390 exact matches jobs are outside your preferred location
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Front End Developer - DV Cleared - Hybrid - Various Locations
Front End Developer - DV Cleared - Hybrid - Various Locations
Experis
UK
£70000 - £120000 per annum + Excellent Benefits
Front End Developer - Must have an Active DV Clearance - Hybrid - Location: Bristol, London, Manchester or Cambridge - Salary: £70,000 - £120,000 (depending on experience) We're looking for a skilled and motivated Front End Developer to help deliver modern, user-focused digital services for clients in the Defence sector. This is an exciting opportunity to join a multi-disciplinary team transforming the way Defence users interact with critical systems. You'll work closely with designers, UX specialists, back-end developers and stakeholders to bring ideas to life through intuitive and responsive interfaces. You'll be key to developing new applications, optimising performance, and shaping the digital journey from prototype through to production. * Building responsive, high-quality web applications and user interfaces using HTML, CSS and JavaScript
Front End Developer - Must have an Active DV Clearance - Hybrid - Location: Bristol, London, Manchester or Cambridge - Salary: £70,000 - £120,000 (depending on experience) We're looking for a skilled and motivated Front End Developer to help deliver modern, user-focused digital services for clients in the Defence sector. This is an exciting opportunity to join a multi-disciplinary team transforming the way Defence users interact with critical systems. You'll work closely with designers, UX specialists, back-end developers and stakeholders to bring ideas to life through intuitive and responsive interfaces. You'll be key to developing new applications, optimising performance, and shaping the digital journey from prototype through to production. * Building responsive, high-quality web applications and user interfaces using HTML, CSS and JavaScript
FEATURED
Full Stack Developer - DV Cleared - Hybrid - Various Locations
Full Stack Developer - DV Cleared - Hybrid - Various Locations
Experis
UK
£60000 - £120000 per annum + Excellent Benefits
Full Stack Developer - Must have an Active DV Clearance - Hybrid - Location: Bristol, London, Manchester or Cambridge - Salary: £70,000 - £120,000 (depending on experience and clearance) We are looking for a Full Stack Developer to join a growing public sector team delivering secure, high-impact digital services across Defence & Security. This is a unique opportunity to use your development expertise to help solve real-world challenges for government and national security clients. You'll work on meaningful projects in an agile environment, applying your skills across the full software development lifecycle - from design through to deployment. You'll be part of a collaborative and supportive engineering team, working alongside technical leads, project managers, and stakeholders to deliver robust and scalable solutions.
Full Stack Developer - Must have an Active DV Clearance - Hybrid - Location: Bristol, London, Manchester or Cambridge - Salary: £70,000 - £120,000 (depending on experience and clearance) We are looking for a Full Stack Developer to join a growing public sector team delivering secure, high-impact digital services across Defence & Security. This is a unique opportunity to use your development expertise to help solve real-world challenges for government and national security clients. You'll work on meaningful projects in an agile environment, applying your skills across the full software development lifecycle - from design through to deployment. You'll be part of a collaborative and supportive engineering team, working alongside technical leads, project managers, and stakeholders to deliver robust and scalable solutions.
FEATURED
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Do you want to be the engineer who builds Arms first AI infrastructure for predictive product quality insights and risk identification? Are you excited by the idea of taking full ownership of development while working with data and ML experts across the company? If so, this role is for you! About the Role - Were looking for a confident leader who can guide ambitious results collaboratively. As the sole developer in the team, youll collaborate with multiple data groups at Arm, creating automation workflows, APIs, and applications that connect datasets with ML models including innovative chat-to-data solutions. What Youll Do * Design and develop applications that integrate data pipelines, ML models, and user-friendly interfaces. * Build APIs and automation workflows using Databricks and related tools. * Apply Process Mining methods to uncover quality and risk insights.
Do you want to be the engineer who builds Arms first AI infrastructure for predictive product quality insights and risk identification? Are you excited by the idea of taking full ownership of development while working with data and ML experts across the company? If so, this role is for you! About the Role - Were looking for a confident leader who can guide ambitious results collaboratively. As the sole developer in the team, youll collaborate with multiple data groups at Arm, creating automation workflows, APIs, and applications that connect datasets with ML models including innovative chat-to-data solutions. What Youll Do * Design and develop applications that integrate data pipelines, ML models, and user-friendly interfaces. * Build APIs and automation workflows using Databricks and related tools. * Apply Process Mining methods to uncover quality and risk insights.
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Location -We are flexible: onsite, hybrid or fully remote, depending on what works for you and the client, UK or Netherlands based. What you will actually be doing - This is not a role where you build clever models that never get used. Your focus is on creating measurable value for clients using data science, machine learning and GenAI, in a consulting and advisory context. You will own work from the very beginning, asking questions like "What value are we trying to create here?" and "Is this the right problem to solve?" through to "It is live, stakeholders are using it and we can see the impact in the numbers." You will work fairly independently and you will also be someone that more junior team members look to for help and direction. A big part of the job is taking messy, ambiguous business and technical problems and turning them into clear, valuable solutions that
Location -We are flexible: onsite, hybrid or fully remote, depending on what works for you and the client, UK or Netherlands based. What you will actually be doing - This is not a role where you build clever models that never get used. Your focus is on creating measurable value for clients using data science, machine learning and GenAI, in a consulting and advisory context. You will own work from the very beginning, asking questions like "What value are we trying to create here?" and "Is this the right problem to solve?" through to "It is live, stakeholders are using it and we can see the impact in the numbers." You will work fairly independently and you will also be someone that more junior team members look to for help and direction. A big part of the job is taking messy, ambiguous business and technical problems and turning them into clear, valuable solutions that
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My client are seeking a talentedScala Developerto join their engineering team and contribute to the design and development ofscalable, high-performance applications. This role involves working on modern distributed systems, building APIs, and collaborating with cross-functional teams to deliver enterprise-grade solutions. * Design, develop and maintain backend services and APIs usingScalaandPlay Framework. * Implement RESTful endpoints, manage request/response lifecycle, and handle authentication/authorization flows. * Write well-structured, idiomatic Scala and use functional programming patterns where appropriate. * Build and maintain automated tests (unit, integration), and support test automation efforts. * Collaborate with product owners, UX, QA, and other engineers in an Agile environment (Scrum/Kanban).
My client are seeking a talentedScala Developerto join their engineering team and contribute to the design and development ofscalable, high-performance applications. This role involves working on modern distributed systems, building APIs, and collaborating with cross-functional teams to deliver enterprise-grade solutions. * Design, develop and maintain backend services and APIs usingScalaandPlay Framework. * Implement RESTful endpoints, manage request/response lifecycle, and handle authentication/authorization flows. * Write well-structured, idiomatic Scala and use functional programming patterns where appropriate. * Build and maintain automated tests (unit, integration), and support test automation efforts. * Collaborate with product owners, UX, QA, and other engineers in an Agile environment (Scrum/Kanban).
Palantir Foundry Lead Consultant - Lead architect and hands-on technical owner for Palantir Foundry implementations. You will design and build production-grade data and application workflows on Foundry, own technical decisions end-to-end and work directly with senior stakeholders while mentoring engineering teams. Core Responsibilities - Foundry Solution Architecture & Build - o Data integration (Pipeline Builder/code-based pipelines, connectors, incremental loads). o Ontology modelling (object/relationship design, semantics, versioning). o Application layer (Workshop, Code Repositories, OSDK/APIs, Actions, AIP/agentic workflows). * Define and implement patterns for data modelling, transformation, and lineage tracking. * Design permission models (RBAC/ABAC), object-level security and auditability. * Implement CI/CD and environment promotion strategies for Foundry arte
Palantir Foundry Lead Consultant - Lead architect and hands-on technical owner for Palantir Foundry implementations. You will design and build production-grade data and application workflows on Foundry, own technical decisions end-to-end and work directly with senior stakeholders while mentoring engineering teams. Core Responsibilities - Foundry Solution Architecture & Build - o Data integration (Pipeline Builder/code-based pipelines, connectors, incremental loads). o Ontology modelling (object/relationship design, semantics, versioning). o Application layer (Workshop, Code Repositories, OSDK/APIs, Actions, AIP/agentic workflows). * Define and implement patterns for data modelling, transformation, and lineage tracking. * Design permission models (RBAC/ABAC), object-level security and auditability. * Implement CI/CD and environment promotion strategies for Foundry arte
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Implement single sign-on and API authentication in WorkForces suite and on-premises environments.
Implement single sign-on and API authentication in WorkForces suite and on-premises environments.
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ServiceNow Architect – Full Time Onsite (Abu Dhabi) Relocation from UK
ServiceNow Architect – Full Time Onsite (Abu Dhabi) Relocation from UK
NST Recruitment Ltd
UK
From £100,000 to £110,000 per annum GBP equivalent to AED - tax free (
The ServiceNow Architect needs good REST API knowledge as well as licence management.
The ServiceNow Architect needs good REST API knowledge as well as licence management.
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A good understanding of API design (REST or GraphQL) and relational databases
A good understanding of API design (REST or GraphQL) and relational databases
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The role bridges business goals with technical execution, leading client engagements from pre-sales through delivery, while also contributing directly as a software engineer on scalable geospatial components, API and data pipelines.
The role bridges business goals with technical execution, leading client engagements from pre-sales through delivery, while also contributing directly as a software engineer on scalable geospatial components, API and data pipelines.
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Experience in scripting in (i.e., PowerShell, REST API, PowerShell, JSON).
Experience in scripting in (i.e., PowerShell, REST API, PowerShell, JSON).
NEWPREMIUM
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Solid knowledge: REST API, SSL/TLS, IPv4, JSON, LDAP, Proxies
Solid knowledge: REST API, SSL/TLS, IPv4, JSON, LDAP, Proxies
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Strong systems and distributed design skills: concurrency, performance, resiliency, API design, and fault isolation.
Strong systems and distributed design skills: concurrency, performance, resiliency, API design, and fault isolation.
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Commercial experience of penetration testing including Web Applications and API. * Postman or SOAP UI for API testing with a security focus (e.g. injection, authorisation, token misuse).
Commercial experience of penetration testing including Web Applications and API. * Postman or SOAP UI for API testing with a security focus (e.g. injection, authorisation, token misuse).
Implement single sign-on and API authentication in WorkForces suite and on-premises environments.
Implement single sign-on and API authentication in WorkForces suite and on-premises environments.
Expert knowledge of HTML, CSS, JavaScript Experience developing Frontend Application using Modern Javascript frameworks like React/Vue/Svelte/Angular Writing unit tests with modern front end testing frameworks like Jest Experience of consuming and modifying CI/CD pipelines Experience working with API of varying types and integrating with backend data Experience of working with cloud technologies (Azure/AWS) Capable of teaching/mentoring/pair-programming with other members of the team - Experience of Docker Experience of working in a Continuous Delivery or Deployment environment Experience of developing any backend API frameworks * Experience working with API of varying types and integrating with backend data * Experience of developing any backend API frameworks
Expert knowledge of HTML, CSS, JavaScript Experience developing Frontend Application using Modern Javascript frameworks like React/Vue/Svelte/Angular Writing unit tests with modern front end testing frameworks like Jest Experience of consuming and modifying CI/CD pipelines Experience working with API of varying types and integrating with backend data Experience of working with cloud technologies (Azure/AWS) Capable of teaching/mentoring/pair-programming with other members of the team - Experience of Docker Experience of working in a Continuous Delivery or Deployment environment Experience of developing any backend API frameworks * Experience working with API of varying types and integrating with backend data * Experience of developing any backend API frameworks
United Kingdom , LondonApply Now - Our Professional Services organization is expanding, and we are looking for an experienced Solution Architect to join our growing team. You'll also collaborate closely with our Builders (Product and R&D) to architect comprehensive and scalable client solutions that help clients unlock the full value of our platform. Please note this role requires attending our London office 3 days a week* About The Role * Support new deals through discovery, requirements gathering, and solution design to post-sale delivery, collaborating closely with Sales, Partners, and Customer Success teams * Lead technical consulting engagements for customers, applying industry knowledge in the areas of system scale, security, user governance, and data architecture * Produce solution design documents, system architecture diagrams, and workflow diagrams that bridg
United Kingdom , LondonApply Now - Our Professional Services organization is expanding, and we are looking for an experienced Solution Architect to join our growing team. You'll also collaborate closely with our Builders (Product and R&D) to architect comprehensive and scalable client solutions that help clients unlock the full value of our platform. Please note this role requires attending our London office 3 days a week* About The Role * Support new deals through discovery, requirements gathering, and solution design to post-sale delivery, collaborating closely with Sales, Partners, and Customer Success teams * Lead technical consulting engagements for customers, applying industry knowledge in the areas of system scale, security, user governance, and data architecture * Produce solution design documents, system architecture diagrams, and workflow diagrams that bridg
The Solutions Architect organization has responsibility for pre- and post-sales client service and is the primary contact of end users of Channels Data Delivery Solutions products (Xpressfeed, API, Cloud Services).
The Solutions Architect organization has responsibility for pre- and post-sales client service and is the primary contact of end users of Channels Data Delivery Solutions products (Xpressfeed, API, Cloud Services).
Proven experience with API development and integration
Proven experience with API development and integration
The Senior Product Manager - NDC, will be versed in NDC order technology, specifically content that enables end-to-end capabilities through API and agency point of sale.
The Senior Product Manager - NDC, will be versed in NDC order technology, specifically content that enables end-to-end capabilities through API and agency point of sale.
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APIs: Understanding of RESTful API design and development.
APIs: Understanding of RESTful API design and development.
Create and maintain API and data integrations between ServiceNow and other services.
Create and maintain API and data integrations between ServiceNow and other services.
Software Consulting Engineer – T&D Configuration Systems & Software Solutions
Software Consulting Engineer – T&D Configuration Systems & Software Solutions
GE Vernova
UK
Competitive
Drive the integration IEC 61850 engineering workflows (SCL-based ICD, SCD, SSD) into intuitive, automated tooling ecosystems aligned with modern UI/UX, API design, and utility integration requirements. * Knowledge of data modeling, API integration, network communications, and cybersecurity practices.
Drive the integration IEC 61850 engineering workflows (SCL-based ICD, SCD, SSD) into intuitive, automated tooling ecosystems aligned with modern UI/UX, API design, and utility integration requirements. * Knowledge of data modeling, API integration, network communications, and cybersecurity practices.
AWS API Gateway
AWS API Gateway
Welcome to Haleon. Were a purpose-driven, world-class consumer company putting everyday health in the hands of millions. In just three years since our launch, weve grown, evolved and are now entering an exciting new chapter one filled with bold ambitions and enormous opportunity. Our trusted portfolio of brands including Sensodyne, Panadol, Advil, Voltaren, Theraflu, Otrivin, and Centrum lead in resilient and growing categories. What sets us apart is our unique blend of deep human understanding and trusted science. Now its time to fully realise the full potential of our business and our people. We do this through our Win as One strategy. It puts our purpose to deliver better everyday health with humanity at the heart of everything we do. It unites us, inspires us, and challenges us to be better every day, driven by our agile, performance-focused culture. About the rol
Welcome to Haleon. Were a purpose-driven, world-class consumer company putting everyday health in the hands of millions. In just three years since our launch, weve grown, evolved and are now entering an exciting new chapter one filled with bold ambitions and enormous opportunity. Our trusted portfolio of brands including Sensodyne, Panadol, Advil, Voltaren, Theraflu, Otrivin, and Centrum lead in resilient and growing categories. What sets us apart is our unique blend of deep human understanding and trusted science. Now its time to fully realise the full potential of our business and our people. We do this through our Win as One strategy. It puts our purpose to deliver better everyday health with humanity at the heart of everything we do. It unites us, inspires us, and challenges us to be better every day, driven by our agile, performance-focused culture. About the rol