101 to 125 of 234 API Design Jobs in England

decision-making — bringing clarity and cohesion to a complex technology landscape. What you’ll be doing Designing and delivering enterprise-grade SaaS architectures for performance, scalability, and security. Leading design discussions, setting standards, and ensuring alignment across multiple product teams. Driving the modernisation of legacy systems and enabling reusable, API-first architectures. Partnering with engineering, product, and security … Architect or Principal Engineer within a complex, large-scale software environment. Strong background in .NET, cloud-native development (AWS or Azure) , and event-driven microservices . Deep understanding of API design, containerisation (Docker/Kubernetes) , and SQL/NoSQL database technologies. A passion for simplification, scalability, and pragmatic delivery. Strong stakeholder management and communication skills across technical and … business audiences. Hands-on, delivery-focused approach — you take ownership from design through to production. Why join? This is an opportunity to make a tangible impact within an established, well-funded organisation undergoing a significant technical transformation. Our client offers a collaborative, engineering-led culture where architecture has influence, innovation is encouraged, and delivery excellence is expected. If you More ❯

decision-making — bringing clarity and cohesion to a complex technology landscape. What you’ll be doing Designing and delivering enterprise-grade SaaS architectures for performance, scalability, and security. Leading design discussions, setting standards, and ensuring alignment across multiple product teams. Driving the modernisation of legacy systems and enabling reusable, API-first architectures. Partnering with engineering, product, and security … Architect or Principal Engineer within a complex, large-scale software environment. Strong background in .NET, cloud-native development (AWS or Azure) , and event-driven microservices . Deep understanding of API design, containerisation (Docker/Kubernetes) , and SQL/NoSQL database technologies. A passion for simplification, scalability, and pragmatic delivery. Strong stakeholder management and communication skills across technical and … business audiences. Hands-on, delivery-focused approach — you take ownership from design through to production. Why join? This is an opportunity to make a tangible impact within an established, well-funded organisation undergoing a significant technical transformation. Our client offers a collaborative, engineering-led culture where architecture has influence, innovation is encouraged, and delivery excellence is expected. If you More ❯

We are seeking a highly skilled and experienced Lead Mulesoft Developer to architect, design, and implement integration solutions using MuleSoft Anypoint Platform. The ideal candidate will have strong experience in Salesforce integration, SaaS platforms, and leading development teams in enterprise environments. Project Start Date : Dec'25/Jan'26 Key Responsibilities: Lead the design and development of integration … solutions using MuleSoft. Collaborate with cross-functional teams including Salesforce developers, architects, and business stakeholders. Develop APIs, orchestrations, and data transformations using MuleSoft Anypoint Studio. Ensure best practices in API design, security, and performance. Manage and mentor junior developers and provide technical guidance. Integrate various SaaS platforms and on-premise systems. Conduct code reviews, unit testing, and performance … documentation and support deployment processes. Required Skills: 8+ years of experience in integration development, with at least 5 years in MuleSoft. Strong hands-on experience with MuleSoft Anypoint Platform , API Manager , and Runtime Manager . Proven experience integrating Salesforce with other systems using MuleSoft. Deep understanding of RESTful APIs , SOAP , RAML , and JSON/XML . Experience with CI More ❯

We are seeking a highly skilled and experienced Lead Mulesoft Developer to architect, design, and implement integration solutions using MuleSoft Anypoint Platform. The ideal candidate will have strong experience in Salesforce integration, SaaS platforms, and leading development teams in enterprise environments. Project Start Date : Dec'25/Jan'26 Key Responsibilities: Lead the design and development of integration … solutions using MuleSoft. Collaborate with cross-functional teams including Salesforce developers, architects, and business stakeholders. Develop APIs, orchestrations, and data transformations using MuleSoft Anypoint Studio. Ensure best practices in API design, security, and performance. Manage and mentor junior developers and provide technical guidance. Integrate various SaaS platforms and on-premise systems. Conduct code reviews, unit testing, and performance … documentation and support deployment processes. Required Skills: 8+ years of experience in integration development, with at least 5 years in MuleSoft. Strong hands-on experience with MuleSoft Anypoint Platform , API Manager , and Runtime Manager . Proven experience integrating Salesforce with other systems using MuleSoft. Deep understanding of RESTful APIs , SOAP , RAML , and JSON/XML . Experience with CI More ❯

Solutions Architect (Integration | API Design)St Albans (Hybrid) Compensation: £95,000 +Bonus +Equity Method Resourcing are proud to be partnering with a fast-growing, international technology business delivering critical services across multiple high-reliability sectors. They're seeking a Solutions Architect to lead the end-to-end technical design of mission-critical platforms and services. The Role … We're seeking an experienced Solution Architect to design scalable, secure, and efficient technology solutions that support a major systems consolidation and migration programme. You will be responsible for planning and documenting the decommissioning of up to 30 disparate systems, and overseeing their seamless migration to a new, unified platform - ensuring zero downtime throughout. In addition, you'll lead … Review implementations to ensure compliance with technical standards Drive innovation through prototyping and evaluation of emerging technologies What We're Looking For: Proven experience in Solution Architecture or Solution Design, ideally in environments involving systems consolidation or major technology transformations Proficiency in cloud platforms, API development, message buses, DevOps practices, and languages such as C#, Python, or PHP More ❯

Solutions Architect (Integration | API Design) St Albans (Hybrid) Compensation: £95,000 +Bonus +Equity Method Resourcing are proud to be partnering with a fast-growing, international technology business delivering critical services across multiple high-reliability sectors. They're seeking a Solutions Architect to lead the end-to-end technical design of mission-critical platforms and services. The Role … We're seeking an experienced Solution Architect to design scalable, secure, and efficient technology solutions that support a major systems consolidation and migration programme. You will be responsible for planning and documenting the decommissioning of up to 30 disparate systems, and overseeing their seamless migration to a new, unified platform - ensuring zero downtime throughout. In addition, you'll lead … Review implementations to ensure compliance with technical standards Drive innovation through prototyping and evaluation of emerging technologies What We're Looking For: Proven experience in Solution Architecture or Solution Design, ideally in environments involving systems consolidation or major technology transformations Proficiency in cloud platforms, API development, message buses, DevOps practices, and languages such as C#, Python, or PHP More ❯

Solutions Architect (Integration | API Design) St Albans (Hybrid) £90,000 + Bonus + Lucrative Shares Scheme Method Resourcing are proud to be partnering with a fast-growing, international technology business delivering critical services across multiple high-reliability sectors. They’re seeking a Solutions Architect to lead the end-to-end technical design of mission-critical platforms and … services. The Role: We’re seeking an experienced Solution Architect to design scalable, secure, and efficient technology solutions that support a major systems consolidation and migration programme. You will be responsible for planning and documenting the decommissioning of up to 30 disparate systems, and overseeing their seamless migration to a new, unified platform — ensuring zero downtime throughout. In addition … Review implementations to ensure compliance with technical standards Drive innovation through prototyping and evaluation of emerging technologies What We’re Looking For: Proven experience in Solution Architecture or Solution Design, ideally in environments involving systems consolidation or major technology transformations Proficiency in cloud platforms, API development, message buses, DevOps practices, and languages such as C#, Python, or PHP More ❯

Solutions Architect (Integration | API Design) St Albans (Hybrid) £90,000 + Bonus + Lucrative Shares Scheme Method Resourcing are proud to be partnering with a fast-growing, international technology business delivering critical services across multiple high-reliability sectors. They’re seeking a Solutions Architect to lead the end-to-end technical design of mission-critical platforms and … services. The Role: We’re seeking an experienced Solution Architect to design scalable, secure, and efficient technology solutions that support a major systems consolidation and migration programme. You will be responsible for planning and documenting the decommissioning of up to 30 disparate systems, and overseeing their seamless migration to a new, unified platform — ensuring zero downtime throughout. In addition … Review implementations to ensure compliance with technical standards Drive innovation through prototyping and evaluation of emerging technologies What We’re Looking For: Proven experience in Solution Architecture or Solution Design, ideally in environments involving systems consolidation or major technology transformations Proficiency in cloud platforms, API development, message buses, DevOps practices, and languages such as C#, Python, or PHP More ❯

influence: you’ll own the internal AI stack, mentor other engineers, and help define how AI and automation are adopted across the company. What You’ll Do Lead the design, architecture, and implementation of internal AI/ML systems for business intelligence. Build robust APIs, microservices, and data pipelines to power intelligent, data-driven tools. Develop retrieval-augmented generation … in Python plus at least one other backend language (TypeScript or Java preferred). Proven experience with AWS , containerisation, and infrastructure as code (Terraform, Docker). Solid understanding of API design, data modelling, and microservice architecture. Excellent communication skills, with the ability to translate technical outcomes into business impact. Tech Environment Languages: Python, TypeScript, Java AI/LLM More ❯

influence: you’ll own the internal AI stack, mentor other engineers, and help define how AI and automation are adopted across the company. What You’ll Do Lead the design, architecture, and implementation of internal AI/ML systems for business intelligence. Build robust APIs, microservices, and data pipelines to power intelligent, data-driven tools. Develop retrieval-augmented generation … in Python plus at least one other backend language (TypeScript or Java preferred). Proven experience with AWS , containerisation, and infrastructure as code (Terraform, Docker). Solid understanding of API design, data modelling, and microservice architecture. Excellent communication skills, with the ability to translate technical outcomes into business impact. Tech Environment Languages: Python, TypeScript, Java AI/LLM More ❯

influence: you’ll own the internal AI stack, mentor other engineers, and help define how AI and automation are adopted across the company. What You’ll Do Lead the design, architecture, and implementation of internal AI/ML systems for business intelligence. Build robust APIs, microservices, and data pipelines to power intelligent, data-driven tools. Develop retrieval-augmented generation … in Python plus at least one other backend language (TypeScript or Java preferred). Proven experience with AWS , containerisation, and infrastructure as code (Terraform, Docker). Solid understanding of API design, data modelling, and microservice architecture. Excellent communication skills, with the ability to translate technical outcomes into business impact. Tech Environment Languages: Python, TypeScript, Java AI/LLM More ❯

influence: you’ll own the internal AI stack, mentor other engineers, and help define how AI and automation are adopted across the company. What You’ll Do Lead the design, architecture, and implementation of internal AI/ML systems for business intelligence. Build robust APIs, microservices, and data pipelines to power intelligent, data-driven tools. Develop retrieval-augmented generation … in Python plus at least one other backend language (TypeScript or Java preferred). Proven experience with AWS , containerisation, and infrastructure as code (Terraform, Docker). Solid understanding of API design, data modelling, and microservice architecture. Excellent communication skills, with the ability to translate technical outcomes into business impact. Tech Environment Languages: Python, TypeScript, Java AI/LLM More ❯

influence: you’ll own the internal AI stack, mentor other engineers, and help define how AI and automation are adopted across the company. What You’ll Do Lead the design, architecture, and implementation of internal AI/ML systems for business intelligence. Build robust APIs, microservices, and data pipelines to power intelligent, data-driven tools. Develop retrieval-augmented generation … in Python plus at least one other backend language (TypeScript or Java preferred). Proven experience with AWS , containerisation, and infrastructure as code (Terraform, Docker). Solid understanding of API design, data modelling, and microservice architecture. Excellent communication skills, with the ability to translate technical outcomes into business impact. Tech Environment Languages: Python, TypeScript, Java AI/LLM More ❯

innovative organisation in the exciting Energy sector. The company is passionate about harnessing technology to drive efficiency and innovation across all of its business. Description Understand business processes and design solutions that improve efficiency, reduce manual effort, and create measurable impact. Build and maintain web applications using ASP.NET (C#) backend and React/Next.js frontend. Connect core systems and … backend and React/Next.js frontend development. Strong understanding of business process improvement and ability to think beyond "just building features". Experience with Azure cloud services. Familiarity with API design, RESTful services, JSON, and data integration patterns. Ability to flex across front-end, middleware, backend, and low/no-code development. Problem-solving mindset: capable of balancing More ❯

Skills & Experience: Strong experience with Node.js, React, and Next.js. Professional experience with cloud platforms (AWS preferred). Experience with automated testing and CI/CD pipelines. Understanding of RESTful API design, microservices, and modern web application architecture. Excellent collaboration, problem-solving, and communication skills, with the ability to work independently and in a team. This is a full More ❯

scale, regulated environments - ideally in Investment, Asset or Wealth Management. Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services. Experience in Java and Spring Boot, or iOS (Swift) or Android (Kotlin) along with exposure to Figma and Vercel is a big plus. Capable More ❯

of demonstrations and documentation. You would contribute positively to all of these activities. You will work with senior members of the team to ensure your solutions conform to Klipboard design standards and technical solution stack. The role reports to the Delivery Manager of the relevant R&D team. We operate a hybrid working policy on completion of probation. The … Knowledge And Experience Preferred, 2:1 Upper second-degree Bachelors in a relevant discipline. 2:2 Lower second will also be considered if evidenced project Demonstrates suitable technical and design abilities. Experience of agile approaches to engineering solutions would be an advantage. Experience in the following, or similar, would be an advantage: A good understanding of VB, or the … React framework. REST-API design .NET 4.5.2+, ASP.NET, C# or similar React/JavaScript/TypeScript/Xamarin/PHP, Restful Service Design, WebAPI Skills & Qualities A true team worker with a constant focus on the goals and objectives of the team. Good problem solving and troubleshooting skills Able to communicate both verbally and in writing, articulating More ❯

the Software Engineering group. In addition to contributing to feature development, you will play a role in shaping the technology and process strategies, and occasionally lead innovation or software design initiatives. Key Responsibilities: Develop new features with a strong focus on high-quality code. Conduct peer code reviews to ensure quality and adherence to best practices. Participate in daily … organization's objectives. Work closely with tech leads, engineers, testers, and other personnel to deliver high-quality products. Take ownership of initiatives related to innovation or addressing technical debt. Design, document, and communicate system solutions with a balanced focus on time, quality, cost, and performance. Collaborate with colleagues across the organization to gain buy-in and feedback on proposals … Required Knowledge & Experience: Essential: Strong proficiency in C# at a commercial level. Solid experience with .NET Core and related open-source technologies. Knowledge of Object Orientation, SOA, and relevant design patterns. Experience with modern software development practices, including agile methodologies , version control, code reviews, and continuous integration. Understanding of concurrency, asynchrony, and parallelism. Experience with Test Driven Development (TDD More ❯

the Software Engineering group. In addition to contributing to feature development, you will play a role in shaping the technology and process strategies, and occasionally lead innovation or software design initiatives. Key Responsibilities: Develop new features with a strong focus on high-quality code. Conduct peer code reviews to ensure quality and adherence to best practices. Participate in daily … organization's objectives. Work closely with tech leads, engineers, testers, and other personnel to deliver high-quality products. Take ownership of initiatives related to innovation or addressing technical debt. Design, document, and communicate system solutions with a balanced focus on time, quality, cost, and performance. Collaborate with colleagues across the organization to gain buy-in and feedback on proposals … Required Knowledge & Experience: Essential: Strong proficiency in C# at a commercial level. Solid experience with .NET Core and related open-source technologies. Knowledge of Object Orientation, SOA, and relevant design patterns. Experience with modern software development practices, including agile methodologies , version control, code reviews, and continuous integration. Understanding of concurrency, asynchrony, and parallelism. Experience with Test Driven Development (TDD More ❯

every year of education • At least 8-10 years of experience with Information Technology Key Responsibilities • Develop and maintain enterprise-scale .NET applications using ASP.NET Core 9.0 and C# • Design and implement RESTful APIs for biogas trading, inventory management, and regulatory reporting • Build complex business logic for RINS credit calculations, LCFS compliance, and carbon credit trading • Work with PostgreSQL … and Microsoft Identity Platform • Develop email workflow systems and automated reporting for regulatory compliance • Create scheduled background jobs using Quartz.NET for data processing and calculations • Integrate with Microsoft Graph API for SharePoint document management via Azure MS Graph • Build real-time features using SignalR for live trading updates • Implement data validation using FluentValidation • Work with Docker and OpenShift for … containerized deployments Required Technical Skills • 5+ years of experience with .NET development (C#, ASP.NET Core) • Strong experience with Entity Framework Core and PostgreSQL • Proficiency in RESTful API design and OpenAPI/Swagger documentation • Experience with authentication systems (OAuth2, JWT, Azure AD) • Knowledge of containerization (Docker) and Kubernetes/OpenShift • Experience with background job processing and scheduled tasks • Understanding More ❯

Proven ability to lead technically by example while remaining hands-on in delivery Strong background in cloud (AWS) and infrastructure as code (Terraform) Solid understanding of SQL and database design Experience with modern frontend stacks and API design Enthusiasm for mentoring, collaboration and delivering software with impact If you’re looking for a role that blends technical More ❯

such as Git. Strong problem-solving skills and a detail-oriented mindset. Ability to work independently and as part of a team. Excellent communication skills. Desirable: Experience with RESTful API design and development. Knowledge of cloud platforms like AWS or Azure. Familiarity with Agile/Scrum methodologies. Experience with DevOps tools and practices. Benefits: Excellent opportunities for development More ❯

to help lead the next phase of growth. The Role We’re looking for an experienced Full Stack Engineer to take ownership of full lifecycle development — from architecture and design through to deployment and optimisation. You’ll be working across both the front and back end, collaborating with a multi-disciplinary team to build products that directly impact the … This is a hands-on, high-impact role with real autonomy and room to grow. Key Responsibilities Build and Own Develop scalable web applications using React, Next.js, and Node.js Design and maintain secure, high-performance RESTful APIs Lead architectural decisions across the full stack Own features end-to-end, from planning through to production Collaborate Work closely with UI … current with industry trends and recommend new technologies What We’re Looking For Strong commercial experience with React, Next.js, Node.js, and JavaScript Solid understanding of back-end development and API design Experience working with cloud platforms (preferably AWS) Familiarity with both SQL and NoSQL databases (e.g. PostgreSQL, MongoDB) Understanding of Git, CI/CD pipelines, and secure coding More ❯

and services. Responsibilities: Build and maintain software using C# and .NET Core/Framework . Develop cloud solutions using Microsoft Azure , including Azure Functions, Blob Storage, Cosmos DB, and API Management. Implement secure and scalable services using REST APIs and Azure AD. Work with both relational and NoSQL databases; familiarity with Entity Framework is desirable. Use version control (e.g. … integration tests. Use container tools like Docker; Kubernetes experience is a plus. Requirements: Strong C# and .NET development experience. Practical knowledge of Azure services and cloud architecture. Comfort with API design, data access, and integration. Experience with automated testing frameworks (e.g. xUnit, NUnit). Understanding of DevOps workflows and version control. More ❯

and Spring Boot experience, solid understanding of Kubernetes and AWS services, and hands-on database development with SQL-based systems. Familiarity with mobile integrations (iOS/Android native), RESTful API design, and Agile delivery methodologies will be highly beneficial. This is an exciting opportunity to work in a dynamic FinTech environment where innovation, quality, and performance are at More ❯