201 to 225 of 289 API Design Jobs in the UK

team of engineers, helping them grow technically and professionally Owning delivery of critical platform services that power Suits Me's financial products Overseeing the full development lifecycle, from architectural design and planning to deployment, observability, and continuous improvement Establishing engineering standards, including code quality, CI/CD, testing, and documentation practices Driving adoption of best practices around API design, data modelling, and event-driven architectures Partnering with Product, Platform, and Security teams to ensure our systems are robust, scalable, and compliant Managing technical priorities, resource planning, and delivery schedules in line with strategic goals Contributing to longer-term technology strategy and roadmap evolution What you’ll bring to Suits Me Proven experience managing or technically leading … a backend or platform engineering team Strong foundation in modern backend technologies - ideally including Node.js/TypeScript, containers, and serverless architectures Deep understanding of system design, distributed systems, and operational reliability Familiarity with cloud-native development (AWS preferred) Excellent communication skills and the ability to align technical delivery with business objectives A collaborative, supportive leadership style that promotes autonomy More ❯

team of engineers, helping them grow technically and professionally Owning delivery of critical platform services that power Suits Me's financial products Overseeing the full development lifecycle, from architectural design and planning to deployment, observability, and continuous improvement Establishing engineering standards, including code quality, CI/CD, testing, and documentation practices Driving adoption of best practices around API design, data modelling, and event-driven architectures Partnering with Product, Platform, and Security teams to ensure our systems are robust, scalable, and compliant Managing technical priorities, resource planning, and delivery schedules in line with strategic goals Contributing to longer-term technology strategy and roadmap evolution What you’ll bring to Suits Me Proven experience managing or technically leading … a backend or platform engineering team Strong foundation in modern backend technologies - ideally including Node.js/TypeScript, containers, and serverless architectures Deep understanding of system design, distributed systems, and operational reliability Familiarity with cloud-native development (AWS preferred) Excellent communication skills and the ability to align technical delivery with business objectives A collaborative, supportive leadership style that promotes autonomy More ❯

vision. Other Highly Desirable, But Not Essential Skills Are Background in Software development, data science, or data engineering. Exposure to cloud platforms (e.g., AWS, Azure, GCP). Understanding of API design, microservices architecture, or event-driven systems. Experience in B2B enterprise software environments with complex stakeholder landscapes. Product management certification (e.g., CSPO, Pragmatic Institute, AIPMM). Degree-educated More ❯

Strong ability to integrate with REST APIs, manage secure authentication flows, and handle offline scenarios Basic understanding of backend systems (e.g. Node.js, AWS) to debug issues and contribute to API design discussions Proficient in Git, with best practices for branching, tagging, and changelogs Comfortable using tools like Jira, TestRail, and writing technical documentation Experience working in cross-functional More ❯

ASAP What we're looking for: 4+ years' experience in software engineering (SaaS or start-up background preferred) Strong proficiency in Python and C#, with hands-on experience in API design and cloud architecture (Azure). Experience with Excel add-ins or Office JavaScript APIs is highly desirable. Exposure to vectorization, RAG (Retrieval-Augmented Generation), or AI-driven … Background or interest in commercial real estate technology. Self-starter with excellent communication skills and the ability to operate autonomously in a dynamic, growing business. What you'll do: Design & Develop: Build and maintain robust back-end services and APIs powering the company's automation suite. Integrate Smartly: Enhance and expand integrations across Microsoft 365 applications (Excel, Word, PowerPoint … . Architect Systems: Help design scalable, secure, and high-performance data infrastructure. Collaborate: Partner closely with the founding team and business stakeholders to translate complex workflows into elegant technical solutions. Lead by Example: Take control of the project, uphold code quality, and drive best practices across the stack. Shape the Future: Contribute to the long-term technical roadmap and More ❯

ASAP What we're looking for: 4+ years' experience in software engineering (SaaS or start-up background preferred) Strong proficiency in Python and C#, with hands-on experience in API design and cloud architecture (Azure). Experience with Excel add-ins or Office JavaScript APIs is highly desirable. Exposure to vectorization, RAG (Retrieval-Augmented Generation), or AI-driven … Background or interest in commercial real estate technology. Self-starter with excellent communication skills and the ability to operate autonomously in a dynamic, growing business. What you'll do: Design & Develop: Build and maintain robust back-end services and APIs powering the company's automation suite. Integrate Smartly: Enhance and expand integrations across Microsoft 365 applications (Excel, Word, PowerPoint … . Architect Systems: Help design scalable, secure, and high-performance data infrastructure. Collaborate: Partner closely with the founding team and business stakeholders to translate complex workflows into elegant technical solutions. Lead by Example: Take control of the project, uphold code quality, and drive best practices across the stack. Shape the Future: Contribute to the long-term technical roadmap and More ❯

hands-on role, with a mix of product development and application support. Responsible for configuring, supporting and fixing live products. Internally, we call this role Python Developer. Your responsibilities Design, develop, and maintain high-quality software applications using Python, Django and related technologies. Application Support development. Collaborate with the business, to translate business, stakeholder and user needs into deliverable … least 2 years' development experience with Python. Strong SQL experience, preferably MySQL or PostgresSQL. Front-end experience with HTML, CSS & JavaScript. A good understanding of software development principles, software design patterns, and best practices. Advantageous Technical skills Experience with Django Experience and understanding of service architectures, such as micro service architecture/composable architectures. Experience of API design More ❯

mass manufacturing system. This is a unique opportunity to contribute to the future of additive manufacturing. The Role As a Software Engineer, you’ll work across the stack to design and deliver high-performance systems used in production environments worldwide. You’ll collaborate with hardware, R&D, and product teams to build operator-facing UIs, scalable back-end services … ideas and feedback to the technical roadmap About You Background as a full-stack engineer, ideally in an industrial or product-led environment Experience delivering complex software systems from design through deployment Hands-on expertise in TypeScript, Node.js, and a front-end framework (ideally Angular) Understanding of API design and operator-facing UI development Strong debugging, problem … solving, and system design skills Excellent communication and collaboration skills with R&D and hardware teams What’s on Offer Salary: £60,000 – £65,000 DOE Enhanced pension contribution 24+ days holiday entitlement Electric vehicle and cycle schemes with free on-site charging Free on-site gym access State-of-the-art 3D printing and prototyping facilities A collaborative More ❯

mass manufacturing system. This is a unique opportunity to contribute to the future of additive manufacturing. The Role As a Software Engineer, you’ll work across the stack to design and deliver high-performance systems used in production environments worldwide. You’ll collaborate with hardware, R&D, and product teams to build operator-facing UIs, scalable back-end services … ideas and feedback to the technical roadmap About You Background as a full-stack engineer, ideally in an industrial or product-led environment Experience delivering complex software systems from design through deployment Hands-on expertise in TypeScript, Node.js, and a front-end framework (ideally Angular) Understanding of API design and operator-facing UI development Strong debugging, problem … solving, and system design skills Excellent communication and collaboration skills with R&D and hardware teams What’s on Offer Salary: £60,000 – £65,000 DOE Enhanced pension contribution 24+ days holiday entitlement Electric vehicle and cycle schemes with free on-site charging Free on-site gym access State-of-the-art 3D printing and prototyping facilities A collaborative More ❯

mass manufacturing system. This is a unique opportunity to contribute to the future of additive manufacturing. The Role As a Software Engineer, you’ll work across the stack to design and deliver high-performance systems used in production environments worldwide. You’ll collaborate with hardware, R&D, and product teams to build operator-facing UIs, scalable back-end services … ideas and feedback to the technical roadmap About You Background as a full-stack engineer, ideally in an industrial or product-led environment Experience delivering complex software systems from design through deployment Hands-on expertise in TypeScript, Node.js, and a front-end framework (ideally Angular) Understanding of API design and operator-facing UI development Strong debugging, problem … solving, and system design skills Excellent communication and collaboration skills with R&D and hardware teams What’s on Offer Salary: £60,000 – £65,000 DOE Enhanced pension contribution 24+ days holiday entitlement Electric vehicle and cycle schemes with free on-site charging Free on-site gym access State-of-the-art 3D printing and prototyping facilities A collaborative More ❯

role in our success. Your Role: Bridging Development & Customer Success As a Firmware Support Engineer, you will be responsible for the end-to-end lifecycle of our firmware, from design and development to post-deployment support. Your expertise in Modbus RTU/TCP and M-Bus will be critical. Key Responsibilities: Design & Development: Create, develop, and test firmware … Customer-Facing Support: Act as the primary technical contact for customers, providing clear, expert support on our products and protocols. Hardware Collaboration: Work with hardware teams; knowledge of PCB design and assembly is a plus for effective troubleshooting. Full Lifecycle Involvement: Participate in requirements definition, unit testing, API design, and maintaining documentation in Confluence. What We're … debugging complex system issues. Strong communication skills, with the ability to explain technical concepts clearly to customers and colleagues. Desirable Skills: Experience with IoT device development. Familiarity with PCB design, assembly, and troubleshooting. Knowledge of test automation frameworks. What We Offer You: Competitive Salary: A competitive package of up to £50,000, dependent on your experience. Specialist Role: Become More ❯

environments, enjoy mentoring engineers, and have a solution-focused mindset? Were partnering with a leading global consulting and technology firm to find a Technical Architect who will: Lead the design and delivery of backend services and APIs Mentor and manage a team of 3+ junior engineers Drive best practices in CI/CD, DevOps, and observability Collaborate across product … frontend, and data teams to deliver end-to-end solutions What were looking for: Strong backend experience: .NET, Java, Node.js, or Python Proven API design, database, and cloud platform skills Hands-on leadership and team management experience Experience in startup or high-growth environments is a big plus Why this role? Join a global consulting & technology leader Be More ❯

enjoy mentoring engineers, and have a solution-focused mindset? We’re partnering with a leading global consulting and technology firm to find a Technical Architect who will: Lead the design and delivery of backend services and APIs Mentor and manage a team of 3+ junior engineers Drive best practices in CI/CD, DevOps, and observability Collaborate across product … frontend, and data teams to deliver end-to-end solutions What we’re looking for: Strong backend experience: .NET, Java, Node.js, or Python Proven API design, database, and cloud platform skills Hands-on leadership and team management experience Experience in startup or high-growth environments is a big plus Why this role? Join a global consulting & technology leader More ❯

the business. Responsibilities: Provide project and delivery assurance across key technology and business initiatives Evaluate strategic alignment and ensure execution aligns with business intent Assess third-party risks, including API design, governance, and integration points Review and challenge SLAs and performance measures to ensure commercial relevance Lead assurance reviews over technology platforms, applications, and infrastructure Apply data analytics … outcomes Technically curious and confident engaging with engineers, data scientists, and delivery leads Familiar with Agile, DevOps, project governance, and third-party management Knowledgeable about performance measurement frameworks and API-related risks Experienced in (or curious about) agentic AI, data visualisation, and analytics If you are ready to combine technical depth with strategic impact and provide insights that drive More ❯

the business. Responsibilities: Provide project and delivery assurance across key technology and business initiatives Evaluate strategic alignment and ensure execution aligns with business intent Assess third-party risks, including API design, governance, and integration points Review and challenge SLAs and performance measures to ensure commercial relevance Lead assurance reviews over technology platforms, applications, and infrastructure Apply data analytics … outcomes Technically curious and confident engaging with engineers, data scientists, and delivery leads Familiar with Agile, DevOps, project governance, and third-party management Knowledgeable about performance measurement frameworks and API-related risks Experienced in (or curious about) agentic AI, data visualisation, and analytics If you are ready to combine technical depth with strategic impact and provide insights that drive More ❯

the business. Responsibilities: Provide project and delivery assurance across key technology and business initiatives Evaluate strategic alignment and ensure execution aligns with business intent Assess third-party risks, including API design, governance, and integration points Review and challenge SLAs and performance measures to ensure commercial relevance Lead assurance reviews over technology platforms, applications, and infrastructure Apply data analytics … outcomes Technically curious and confident engaging with engineers, data scientists, and delivery leads Familiar with Agile, DevOps, project governance, and third-party management Knowledgeable about performance measurement frameworks and API-related risks Experienced in (or curious about) agentic AI, data visualisation, and analytics If you are ready to combine technical depth with strategic impact and provide insights that drive More ❯

fast to take things to the next level. Youll join as a Senior Backend Engineer , taking ownership of complex Python/Django services that power enterprise decarbonisation. Expect to design elegant APIs, tackle data-heavy challenges, and collaborate closely with sustainability experts and product teams. What makes this special? High-performance engineering team smart, passionate, and collaborative Big mission …/CD, and plenty of greenfield challenges Youll be a great fit if you bring: 7+ years backend experience (Python expertise essential) Strong knowledge of Django (or similar) and API design Experience scaling apps, with an eye for performance and reliability A proactive, problem-solving mindset and love for collaboration Enjoy a collaborative, chic, and modern office environment More ❯

in tight cycles. This is an early-stage, hands-on role with significant autonomy and responsibility to drive backend product development, collaborating closely with founders, creators, and product/design to turn lean specs into reliable, scalable services. Responsibilities Implement features end-to-end on the backend (APIs → data models → integrations) and maintain quality while moving fast. Run tight … safety guardrails). Essential Requirements 2–4+ years building production backends/services , with shipped work and clear ownership. Strong Python (FastAPI) and database skills ( PostgreSQL/MongoDB ); solid API design fundamentals. Familiarity with AWS serverless patterns and Docker for bespoke services; basic CI/CD concepts. Comfortable with Redis (caching/sessions) and common queue/messaging More ❯

in tight cycles. This is an early-stage, hands-on role with significant autonomy and responsibility to drive backend product development, collaborating closely with founders, creators, and product/design to turn lean specs into reliable, scalable services. Responsibilities Implement features end-to-end on the backend (APIs → data models → integrations) and maintain quality while moving fast. Run tight … safety guardrails). Essential Requirements 2–4+ years building production backends/services , with shipped work and clear ownership. Strong Python (FastAPI) and database skills ( PostgreSQL/MongoDB ); solid API design fundamentals. Familiarity with AWS serverless patterns and Docker for bespoke services; basic CI/CD concepts. Comfortable with Redis (caching/sessions) and common queue/messaging More ❯

in tight cycles. This is an early-stage, hands-on role with significant autonomy and responsibility to drive backend product development, collaborating closely with founders, creators, and product/design to turn lean specs into reliable, scalable services. Responsibilities Implement features end-to-end on the backend (APIs → data models → integrations) and maintain quality while moving fast. Run tight … safety guardrails). Essential Requirements 2–4+ years building production backends/services , with shipped work and clear ownership. Strong Python (FastAPI) and database skills ( PostgreSQL/MongoDB ); solid API design fundamentals. Familiarity with AWS serverless patterns and Docker for bespoke services; basic CI/CD concepts. Comfortable with Redis (caching/sessions) and common queue/messaging More ❯

in tight cycles. This is an early-stage, hands-on role with significant autonomy and responsibility to drive backend product development, collaborating closely with founders, creators, and product/design to turn lean specs into reliable, scalable services. Responsibilities Implement features end-to-end on the backend (APIs → data models → integrations) and maintain quality while moving fast. Run tight … safety guardrails). Essential Requirements 2–4+ years building production backends/services , with shipped work and clear ownership. Strong Python (FastAPI) and database skills ( PostgreSQL/MongoDB ); solid API design fundamentals. Familiarity with AWS serverless patterns and Docker for bespoke services; basic CI/CD concepts. Comfortable with Redis (caching/sessions) and common queue/messaging More ❯

in tight cycles. This is an early-stage, hands-on role with significant autonomy and responsibility to drive backend product development, collaborating closely with founders, creators, and product/design to turn lean specs into reliable, scalable services. Responsibilities Implement features end-to-end on the backend (APIs → data models → integrations) and maintain quality while moving fast. Run tight … safety guardrails). Essential Requirements 2–4+ years building production backends/services , with shipped work and clear ownership. Strong Python (FastAPI) and database skills ( PostgreSQL/MongoDB ); solid API design fundamentals. Familiarity with AWS serverless patterns and Docker for bespoke services; basic CI/CD concepts. Comfortable with Redis (caching/sessions) and common queue/messaging More ❯

Manchester) Up to £160,000 + benefits/Bonus Join a leading financial technology and trading organisation driving innovation in electronic markets. As an eFX Software Engineer, you'll design and deliver high-performance, low-latency trading solutions that underpin mission-critical systems. This role offers the chance to work on cutting-edge technology where speed, scalability, and resilience … are key. About the Role Lead the design and development of secure, high-performance eFX systems Define and evolve Java patterns and techniques optimised for ultra-low latency (<40s) Architect fault-tolerant, scalable trading systems Influence technical strategy, architecture, and product roadmaps Collaborate with multiple teams to deliver best-in-class E-trading platforms Ensure all solutions meet security … compliance, and performance standards What You'll Bring Strong experience in software engineering, architecture, and database design Expert-level Java development, including low-GC and lock-free patterns Proven background in FX trading systems, pricing, and risk management Deep understanding of CPU architecture, cache optimisation, and Linux performance tuning Expertise in networking and messaging (TCP, UDP, Multicast, FIX) Knowledge More ❯

Manchester)Up to £160,000 + benefits/Bonus Join a leading financial technology and trading organisation driving innovation in electronic markets. As an eFX Software Engineer, you'll design and deliver high-performance, low-latency trading solutions that underpin mission-critical systems. This role offers the chance to work on cutting-edge technology where speed, scalability, and resilience … are key. About the Role Lead the design and development of secure, high-performance eFX systems Define and evolve Java patterns and techniques optimised for ultra-low latency (<40μs) Architect fault-tolerant, scalable trading systems Influence technical strategy, architecture, and product roadmaps Collaborate with multiple teams to deliver best-in-class E-trading platforms Ensure all solutions meet security … compliance, and performance standards What You'll Bring Strong experience in software engineering, architecture, and database design Expert-level Java development, including low-GC and lock-free patterns Proven background in FX trading systems, pricing, and risk management Deep understanding of CPU architecture, cache optimisation, and Linux performance tuning Expertise in networking and messaging (TCP, UDP, Multicast, FIX) Knowledge More ❯

a regular on-site presence (2 days onsite). Key Skills: - 5 years professional experience with TypeScript, JavaScript, and Node.js - Experience with frameworks such as React and NextJS, and API Design - Excellent communication skills with stakeholders and team members - Solid understanding of web development fundamentals and performance optimisation techniques - Ability to design, develop, test, deploy, and continuously More ❯