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7 Permanent API jobs in Saffron Walden + 20 miles
204 exact matches jobs are outside your preferred location
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A World-Changing Company - Palantir builds the worlds leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and more. The Role - Palantir Foundry is an end-to-end platform for data-driven decision-making. We're transforming the way organisations securely integrate their data, so they can then build reliable, critical applications atop that unified foundation. Our customers use Foundry to perform rich analyses that drive core operations within their organisations. They can also build sophisticated, full-fledged programs, such as common operating pictures, alert-triaging inboxes, and resource allocation planning tools driven by rich-ML models.
A World-Changing Company - Palantir builds the worlds leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and more. The Role - Palantir Foundry is an end-to-end platform for data-driven decision-making. We're transforming the way organisations securely integrate their data, so they can then build reliable, critical applications atop that unified foundation. Our customers use Foundry to perform rich analyses that drive core operations within their organisations. They can also build sophisticated, full-fledged programs, such as common operating pictures, alert-triaging inboxes, and resource allocation planning tools driven by rich-ML models.
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Location: London (Hybrid - 2 days in office) Permanent - Availability: Immediate Joiner - About the Role - We're seeking a highly skilled Linux Administrator with strong Red Hat Enterprise Linux (RHEL) experience to join our infrastructure engineering team. The ideal candidate will bring hands-on expertise in system administration, automation, and virtualization, while maintaining a proactive engineering mindset focused on continuous improvement and efficiency. Key Responsibilities * Install, configure, and manage Red Hat Satellite servers. * Perform server implementation, upgrades, maintenance, and monitoring across environments. * Develop and maintain automation solutions using Ansible and Ansible Automation Platform (AAP). * Manage and upgrade VMware environments. * Troubleshoot and resolve system, platform, and network issues with minimal supervision.
Location: London (Hybrid - 2 days in office) Permanent - Availability: Immediate Joiner - About the Role - We're seeking a highly skilled Linux Administrator with strong Red Hat Enterprise Linux (RHEL) experience to join our infrastructure engineering team. The ideal candidate will bring hands-on expertise in system administration, automation, and virtualization, while maintaining a proactive engineering mindset focused on continuous improvement and efficiency. Key Responsibilities * Install, configure, and manage Red Hat Satellite servers. * Perform server implementation, upgrades, maintenance, and monitoring across environments. * Develop and maintain automation solutions using Ansible and Ansible Automation Platform (AAP). * Manage and upgrade VMware environments. * Troubleshoot and resolve system, platform, and network issues with minimal supervision.
FEATURED
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Senior Backend Engineer
Senior Backend Engineer
Plexus Resource Solutions Ltd
City of London (EC1)
From £110,000 to £150,000 per annum
Web3 / Social Product / Blockchain Infrastructure - Remote - 110k-150k - Plexus is partnering with a leading Web3 innovator building the next-generation social platform powered by blockchain. Theyre seeking a Senior Backend Engineer to architect scalable systems and help bring seamless, on-chain social experiences to life. The candidate will lead backend architecture and development for the companys social platform. Responsibilities - Design, develop, and maintain scalable backend systems and APIs. Collaborate with frontend engineers to deliver seamless user experiences. Integrate web3 technologies via third-party APIs or in-house solutions. Continuously improve infrastructure, monitoring, and engineering processes. Requirements - 4+ years of production software engineering experience, ideally at scale. Strong proficiency with TypeScript, Node.js, and AWS.
Web3 / Social Product / Blockchain Infrastructure - Remote - 110k-150k - Plexus is partnering with a leading Web3 innovator building the next-generation social platform powered by blockchain. Theyre seeking a Senior Backend Engineer to architect scalable systems and help bring seamless, on-chain social experiences to life. The candidate will lead backend architecture and development for the companys social platform. Responsibilities - Design, develop, and maintain scalable backend systems and APIs. Collaborate with frontend engineers to deliver seamless user experiences. Integrate web3 technologies via third-party APIs or in-house solutions. Continuously improve infrastructure, monitoring, and engineering processes. Requirements - 4+ years of production software engineering experience, ideally at scale. Strong proficiency with TypeScript, Node.js, and AWS.
LSEG is seeking a Senior Vulnerability Management Engineer to join our internal offensive security team with focus on driving closure of penetration testing findings. This role bridges offensive security and engineering by translating penetration test results into clear, actionable remediation guidance and partnering with application and platform teams to implement secure fixes. The successful candidate has a strong penetration testing or application security background, hands on remediation experience, and the ability to coordinate multiple collaborators to reduce risk at scale. This is a highly technical, delivery focused role with responsibility for both individual findings and systemic improvements. Key Responsibilities * Analyze and review penetration test reports to understand technical impact, exploitability, and business risk.
LSEG is seeking a Senior Vulnerability Management Engineer to join our internal offensive security team with focus on driving closure of penetration testing findings. This role bridges offensive security and engineering by translating penetration test results into clear, actionable remediation guidance and partnering with application and platform teams to implement secure fixes. The successful candidate has a strong penetration testing or application security background, hands on remediation experience, and the ability to coordinate multiple collaborators to reduce risk at scale. This is a highly technical, delivery focused role with responsibility for both individual findings and systemic improvements. Key Responsibilities * Analyze and review penetration test reports to understand technical impact, exploitability, and business risk.
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Location: London - 1x a month - Salary: Up to £120,000 (D.O.E) + benefits - Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance. It's an ideal role for a driven Lead Engineer who thrives in ambitious environments and wants to make a tangible impact. As a Lead Backend Engineer, you'll take ownership of designing and scaling cloud-native backend systems. You'll work primarily with Python (FastAPI) and play a key role in shaping the architecture of microservices that support millions of users. Beyond hands-on development, you'll provide technical leadership, mentor team members, and influence strategic engineering decisions.
Location: London - 1x a month - Salary: Up to £120,000 (D.O.E) + benefits - Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance. It's an ideal role for a driven Lead Engineer who thrives in ambitious environments and wants to make a tangible impact. As a Lead Backend Engineer, you'll take ownership of designing and scaling cloud-native backend systems. You'll work primarily with Python (FastAPI) and play a key role in shaping the architecture of microservices that support millions of users. Beyond hands-on development, you'll provide technical leadership, mentor team members, and influence strategic engineering decisions.
Location: London - 1x a month - Salary: Up to £95,000 (D.O.E) + benefits - Fruition Group working with a leading Insurtech unicorn on a mission to transform the insurance industry. Their products have already generated millions in revenue, and now they're investing heavily in new innovations that will shape the sector for years to come. This is an exciting opportunity for a motivated Senior Engineer who wants to grow in a high-performing, forward-thinking business. As a Senior Backend Engineer, you'll play a central role in building and scaling the systems that power their insurance platform. You'll focus on developing Python-based cloud microservices (FastAPI preferred), contributing to the architecture of resilient, high-performance systems, and collaborating with a cross-functional team to deliver features at pace.
Location: London - 1x a month - Salary: Up to £95,000 (D.O.E) + benefits - Fruition Group working with a leading Insurtech unicorn on a mission to transform the insurance industry. Their products have already generated millions in revenue, and now they're investing heavily in new innovations that will shape the sector for years to come. This is an exciting opportunity for a motivated Senior Engineer who wants to grow in a high-performing, forward-thinking business. As a Senior Backend Engineer, you'll play a central role in building and scaling the systems that power their insurance platform. You'll focus on developing Python-based cloud microservices (FastAPI preferred), contributing to the architecture of resilient, high-performance systems, and collaborating with a cross-functional team to deliver features at pace.
We are seeking an experienced Front-end Engineer to help build and evolve a web-based platform for reinforcement learning (RL) training and RLOps. You will design, implement, and optimise user-facing interfaces and front-end systems that support large-scale RL model development and deployment. Responsibilities * Develop scalable, reliable front-end architecture for an RL training and management platform * Translate requirements into high-quality user interfaces and workflows * Collaborate with designers and engineers to implement visual design within brand guidelines * Ensure cross-browser and cross-device compatibility, resolving UI/UX issues * Optimise performance, including load times and runtime efficiency * Ensure accessibility compliance (e.g., WCAG) * Identify and resolve user-facing bugs and usability issues
We are seeking an experienced Front-end Engineer to help build and evolve a web-based platform for reinforcement learning (RL) training and RLOps. You will design, implement, and optimise user-facing interfaces and front-end systems that support large-scale RL model development and deployment. Responsibilities * Develop scalable, reliable front-end architecture for an RL training and management platform * Translate requirements into high-quality user interfaces and workflows * Collaborate with designers and engineers to implement visual design within brand guidelines * Ensure cross-browser and cross-device compatibility, resolving UI/UX issues * Optimise performance, including load times and runtime efficiency * Ensure accessibility compliance (e.g., WCAG) * Identify and resolve user-facing bugs and usability issues
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We're seeking an experienced Senior Full Stack Developer to join our clients expanding technology team. In this role, you'll be instrumental in designing, developing, and maintaining high-quality, scalable web applications. You'll work across the full stack, collaborating closely with colleagues to deliver impactful, user-focused solutions. Key Responsibilities * Develop and maintain modern web applications using C# .NET (Core/Framework) and React. * Work with cross-functional teams to define requirements and deliver new features. * Write clean, scalable, and well-tested code. * Diagnose and resolve application issues to ensure optimal performance. You will have - * 3+ years' experience as a Full Stack Developer. * Strong hands-on expertise with C# .NET (Core) and React. * Good understanding of REST APIs, SQL/NoSQL databases, and Git version control.
We're seeking an experienced Senior Full Stack Developer to join our clients expanding technology team. In this role, you'll be instrumental in designing, developing, and maintaining high-quality, scalable web applications. You'll work across the full stack, collaborating closely with colleagues to deliver impactful, user-focused solutions. Key Responsibilities * Develop and maintain modern web applications using C# .NET (Core/Framework) and React. * Work with cross-functional teams to define requirements and deliver new features. * Write clean, scalable, and well-tested code. * Diagnose and resolve application issues to ensure optimal performance. You will have - * 3+ years' experience as a Full Stack Developer. * Strong hands-on expertise with C# .NET (Core) and React. * Good understanding of REST APIs, SQL/NoSQL databases, and Git version control.
We're seeking an experienced Senior Full Stack Developer to join our clients expanding technology team. In this role, you'll be instrumental in designing, developing, and maintaining high-quality, scalable web applications. You'll work across the full stack, collaborating closely with colleagues to deliver impactful, user-focused solutions. Key Responsibilities * Develop and maintain modern web applications using C# .NET (Core/Framework) and React. * Work with cross-functional teams to define requirements and deliver new features. * Write clean, scalable, and well-tested code. * Diagnose and resolve application issues to ensure optimal performance. You will have - * 3+ years' experience as a Full Stack Developer. * Strong hands-on expertise with C# .NET (Core) and React. * Good understanding of REST APIs, SQL/NoSQL databases, and Git version control.
We're seeking an experienced Senior Full Stack Developer to join our clients expanding technology team. In this role, you'll be instrumental in designing, developing, and maintaining high-quality, scalable web applications. You'll work across the full stack, collaborating closely with colleagues to deliver impactful, user-focused solutions. Key Responsibilities * Develop and maintain modern web applications using C# .NET (Core/Framework) and React. * Work with cross-functional teams to define requirements and deliver new features. * Write clean, scalable, and well-tested code. * Diagnose and resolve application issues to ensure optimal performance. You will have - * 3+ years' experience as a Full Stack Developer. * Strong hands-on expertise with C# .NET (Core) and React. * Good understanding of REST APIs, SQL/NoSQL databases, and Git version control.
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Job Title: Observability Developer / Engineer - Location: Hybrid (UK, with travel as required) Employment Type: Full-time - This role is with Morela please respond to for further informaiton - Do you want to be part of something special? Morela is proud to represent our exclusive client, a fast-growing start-up transforming Service Operations. Led by industry leaders with a proven track record of building and scaling successful businesses, this company is redefining how enterprises monitor, manage, and optimise IT operations. This is your chance to join a team shaping the future of observability and operational intelligence from the ground up. We are seeking a skilled Observability Developer to design, build, and optimise observability solutions that help enterprise clients gain actionable insights from their logs, metrics, traces, and events.
Job Title: Observability Developer / Engineer - Location: Hybrid (UK, with travel as required) Employment Type: Full-time - This role is with Morela please respond to for further informaiton - Do you want to be part of something special? Morela is proud to represent our exclusive client, a fast-growing start-up transforming Service Operations. Led by industry leaders with a proven track record of building and scaling successful businesses, this company is redefining how enterprises monitor, manage, and optimise IT operations. This is your chance to join a team shaping the future of observability and operational intelligence from the ground up. We are seeking a skilled Observability Developer to design, build, and optimise observability solutions that help enterprise clients gain actionable insights from their logs, metrics, traces, and events.
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Solution Architect
Solution Architect
Henderson Scott
North West London, London, NW1 7AW
£70000.00 - £75000.00 per annum + Highly Remote, 30 days AL+BH
Maintain and enforce standards for API design, integration patterns, data schemas (including Medallion architecture), and security (RBAC, data classification).
Maintain and enforce standards for API design, integration patterns, data schemas (including Medallion architecture), and security (RBAC, data classification).
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The successful applicant will have comprehensive expertise in Microsoft Azure services, Web API, Azure App Service, .NET Core, and Visual Studio. * Design and implement scalable cloud solutions utilizing Azure App Service, Web API, and .NET Core. * Define architecture patterns for microservices, API management, and integration with enterprise systems. * Utilize Azure Functions, Azure Logic Apps, Azure API Management, and Azure Storage to develop robust applications. * Expertise in Microsoft Azure services, including App Service, Functions, API Management, Storage, and Networking. * Strong knowledge of .NET Core, Web API, C#, and Visual Studio.
The successful applicant will have comprehensive expertise in Microsoft Azure services, Web API, Azure App Service, .NET Core, and Visual Studio. * Design and implement scalable cloud solutions utilizing Azure App Service, Web API, and .NET Core. * Define architecture patterns for microservices, API management, and integration with enterprise systems. * Utilize Azure Functions, Azure Logic Apps, Azure API Management, and Azure Storage to develop robust applications. * Expertise in Microsoft Azure services, including App Service, Functions, API Management, Storage, and Networking. * Strong knowledge of .NET Core, Web API, C#, and Visual Studio.
Senior Backend Engineer
Senior Backend Engineer
Plexus Resource Solutions Ltd
City of London (EC1)
From £60,000 to £100,000 per annum
Use Rest API with Python
Use Rest API with Python
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Expertise in system and API design, scalability, and performance tuning
Expertise in system and API design, scalability, and performance tuning
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Senior Frontend Developer
Senior Frontend Developer
Pathfinder Business Solutions Ltd
Milton Keynes (MK9), MK9 3QA
From £50,000 to £60,000 per annum Full Benefits Pack
REST-based API development
REST-based API development
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Senior Full Stack Engineer
Senior Full Stack Engineer
McGregor Boyall Associates Limited
City of London (EC1)
£80000 - £120000 per annum + bonus
Strong knowledge of system design principles, scalable architecture patterns, and API design.
Strong knowledge of system design principles, scalable architecture patterns, and API design.
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Integration & API Testing - proficiency with REST/OData service testing using tools like Postman or SoapUI
Integration & API Testing - proficiency with REST/OData service testing using tools like Postman or SoapUI
Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
Familiarity with REST API and Soap Services
Familiarity with REST API and Soap Services
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Microservices architecture, API-first approach, containerisation (Docker/Kubernetes), CI/CD pipelines * Knowledge of integration patterns, API gateways, and cloud-native deployments
Microservices architecture, API-first approach, containerisation (Docker/Kubernetes), CI/CD pipelines * Knowledge of integration patterns, API gateways, and cloud-native deployments
Machine Learning Engineer (Reinforcement Learning)
Machine Learning Engineer (Reinforcement Learning)
FBI &TMT
City of London, London
Up to £85000.00 per annum
Familiarity with model deployment and management, including API development, deployment pipelines, and performance optimisation.
Familiarity with model deployment and management, including API development, deployment pipelines, and performance optimisation.
API Management gateways
API Management gateways
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Data exchange and processing skills (e.g. ETL, ESB, API...)
Data exchange and processing skills (e.g. ETL, ESB, API...)
FEATURED
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Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid
Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid
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Design, develop, and deliver custom solutions within Planon's API framework.
Design, develop, and deliver custom solutions within Planon's API framework.
FEATURED
Related Jobs
Locations
- Shoreditch
- The City, City (EC4)
- Hinxton
- Southwark
- The City, City (EC3)
- Arundel Heights
- Burton End
- Covent Garden
- Datchet Common
- Euston
- City of London
- Milton Keynes
- Central London
- West End
- South East London
- Cambridge
- East London
- Stevenage
- North West London
- Borehamwood
- London
- Buckinghamshire
- Hertfordshire
- Cambridgeshire
- Essex
- Berkshire
- Lincolnshire
- Northamptonshire
- Suffolk
- South East
- East Anglia
- East Midlands
- Midlands