76 to 100 of 227 API Design Jobs in the UK

have the opportunity to work across a modern engineering environment, collaborate with agile product teams, and contribute to a high-traffic platform used by millions of customers. Key Responsibilities: Design, build, and maintain scalable, high-performance services using Kotlin or Java Provide technical leadership and mentoring to other engineers in the team Contribute to solution architecture and strategic technical … Skills & Experience 5+ years of back-end development experience using Kotlin or modern Java Expertise in microservice architectures and frameworks like Spring Boot or http4k Deep understanding of RESTful API design and integration Proven experience mentoring engineers and contributing to high-performing teams Familiarity with Agile (Scrum or Kanban), TDD, and pair programming practices Experience with CI/ More ❯

secure, and privacy-compliant solutions that deliver measurable impact across the organization. A strong technical background is essential to understand and leverage the latest advancements in technology. Key Responsibilities: Design: Develop and document high-quality end-to-end solutions that meet internal requirements, ensuring they are fit for purpose, compliant, scalable, and secure. Innovation: Stay abreast of emerging technologies … and analyse data to support decision-making processes. Implement data governance frameworks and ensure data integrity, security, and compliance. This should include relational, graph, key-value and streaming data design constraints. Infrastructure Expertise: Design, deploy (using GitOps & IaC), and manage solutions on Azure and Kubernetes, ensuring high availability, scalability, and security. Risk Management: Identify and mitigate risks associated … with solution design and delivery, ensuring robust and resilient architectures. Mentor and develop technical talent, promoting a culture of learning and growth. Requirements: Proven experience in a senior leadership role driving innovation in complex, data-driven environments. Deep understanding of cloud infrastructure, data orchestration, and AI/ML applications in operational contexts. Strong business acumen with the ability to More ❯

secure, and privacy-compliant solutions that deliver measurable impact across the organization. A strong technical background is essential to understand and leverage the latest advancements in technology. Key Responsibilities: Design: Develop and document high-quality end-to-end solutions that meet internal requirements, ensuring they are fit for purpose, compliant, scalable, and secure. Innovation: Stay abreast of emerging technologies … and analyse data to support decision-making processes. Implement data governance frameworks and ensure data integrity, security, and compliance. This should include relational, graph, key-value and streaming data design constraints. Infrastructure Expertise: Design, deploy (using GitOps & IaC), and manage solutions on Azure and Kubernetes, ensuring high availability, scalability, and security. Risk Management: Identify and mitigate risks associated … with solution design and delivery, ensuring robust and resilient architectures. Mentor and develop technical talent, promoting a culture of learning and growth. Requirements: Proven experience in a senior leadership role driving innovation in complex, data-driven environments. Deep understanding of cloud infrastructure, data orchestration, and AI/ML applications in operational contexts. Strong business acumen with the ability to More ❯

PHP Full-Stack Developer (Mid-Level). Impact Technology Transformation, Modernisation, and Scalability. Size Medium-sized team, part of an exciting in-house engineering transformation. Skills PHP (Laravel), JQuery, API Development, MySQL, SOLID Principles, and modern DevOps tools. Location London, UK. Hybrid Flexible working policy with a collaborative office culture. Offer £50,000 - £60,000 Benefits Private medical, dental … part of a motivated and collaborative development team, you'll play a pivotal role in enhancing and modernising the company's tech stack. This involves building a robust backend API, integrating third-party platforms, and rolling out innovative features to enhance customer experience and operational efficiency. This is a PHP Laravel-focused position, but it also offers the opportunity … high-performing, scalable, and secure platform. What makes you a great fit: You're an experienced PHP developer with strong Laravel skills. You have a solid grasp of SOLID design principles , enjoy working in a fast-paced environment, and have experience building robust, well-optimised APIs. Bonus points if you have worked with DevOps practices or modern tools like More ❯

with our mission. This role is ideal for someone who thrives in a hands-on technical leadership position and is passionate about building impactful solutions. Key Responsibilities: Lead the design, development, and deployment of scalable, robust, and secure backend systems using Python. Collaborate with cross-functional teams to define technical requirements and drive product innovation. Oversee and contribute to … continuously improve our platform. Required Skills and Qualifications: 5+ years of professional experience in Python development. Strong experience with Django, Flask, or similar Python web frameworks. Proven ability to design and implement scalable, cloud-based solutions (e.g., AWS, Azure, or GCP). Proficiency in relational and non-relational databases (e.g., PostgreSQL, MongoDB). Hands-on experience with RESTful API design and implementation. Solid understanding of software architecture, design patterns, and best practices. Experience with CI/CD pipelines and DevOps practices. Strong problem-solving skills and a proactive attitude. Excellent communication and leadership abilities. What We Offer: Opportunity to make a meaningful impact by improving accessibility for millions of users. Salary + Equity + Bonus Remote More ❯

Principal Engineer - Law Firm 3 days pw in London Lead the design, architecture, and development of innovative technical solutions, with a focus on Microsoft Azure, cloud-native technologies, and microservices architecture.Act as an internal SME across complex business and technology projects, providing expert third-line support and driving resolution of critical incidents.Own and evolve our approach to disaster recovery … experience with a broad tech stack including: C#, JavaScript, Python Azure, Terraform, Kubernetes, Docker CI/CD pipelines (Azure DevOps, GitHub Actions, etc.) Front End frameworks (React, Vue, ASP.NET) API design (REST, JSON, XML) Database experience: SQL, NoSQL, vector databases AI integration: OpenAI, Gemini, and other LLMs Strong knowledge of agile, lean, and DevOps best practices.A collaborative, commercial More ❯

Principal Engineer - Law Firm 3 days pw in London Lead the design, architecture, and development of innovative technical solutions, with a focus on Microsoft Azure, cloud-native technologies, and microservices architecture.Act as an internal SME across complex business and technology projects, providing expert third-line support and driving resolution of critical incidents.Own and evolve our approach to disaster recovery … experience with a broad tech stack including: C#, JavaScript, Python Azure, Terraform, Kubernetes, Docker CI/CD pipelines (Azure DevOps, GitHub Actions, etc.) Front End frameworks (React, Vue, ASP.NET) API design (REST, JSON, XML) Database experience: SQL, NoSQL, vector databases AI integration: OpenAI, Gemini, and other LLMs Strong knowledge of agile, lean, and DevOps best practices.A collaborative, commercial More ❯

Principal Engineer - Law Firm 3 days pw in London Lead the design, architecture, and development of innovative technical solutions, with a focus on Microsoft Azure, cloud-native technologies, and microservices architecture.Act as an internal SME across complex business and technology projects, providing expert third-line support and driving resolution of critical incidents.Own and evolve our approach to disaster recovery … experience with a broad tech stack including: C#, JavaScript, Python Azure, Terraform, Kubernetes, Docker CI/CD pipelines (Azure DevOps, GitHub Actions, etc.) Front End frameworks (React, Vue, ASP.NET) API design (REST, JSON, XML) Database experience: SQL, NoSQL, vector databases AI integration: OpenAI, Gemini, and other LLMs Strong knowledge of agile, lean, and DevOps best practices.A collaborative, commercial More ❯

Automotive Technology Solutions Client : Major automotive industry leader via global consultancy partnership Technical Requirements Backend Development C# .NET Framework/Core - Extensive experience developing robust, scalable backend services RESTful API Development - Design and implementation of web APIs Microservices Architecture - Understanding of distributed systems and service-oriented architecture Frontend Development Blazor - Proficiency in Blazor Server and/or Blazor … Strong experience including hooks, state management, and modern development practices JavaScript/TypeScript - Advanced knowledge of modern JavaScript and TypeScript HTML5/CSS3 - Solid understanding of web standards, responsive design, and cross-browser compatibility Database Technologies Oracle (Preferred) - Database development, PL/SQL, and performance optimization SQL Server (Alternative) - T-SQL and database design experience acceptable Entity Framework … driven development (TDD) Performance optimization and scalability techniques Content Management Systems knowledge Key Responsibilities Develop and maintain full stack applications using C# .NET backend with Blazor/React frontend Design and implement database solutions using Oracle/SQL Server Collaborate with cross-functional teams including UX/UI designers and business analysts Participate in code reviews and maintain high More ❯

Automotive Technology Solutions Client : Major automotive industry leader via global consultancy partnership Technical Requirements Backend Development C# .NET Framework/Core - Extensive experience developing robust, scalable backend services RESTful API Development - Design and implementation of web APIs Microservices Architecture - Understanding of distributed systems and service-oriented architecture Frontend Development Blazor - Proficiency in Blazor Server and/or Blazor … Strong experience including hooks, state management, and modern development practices JavaScript/TypeScript - Advanced knowledge of modern JavaScript and TypeScript HTML5/CSS3 - Solid understanding of web standards, responsive design, and cross-browser compatibility Database Technologies Oracle (Preferred) - Database development, PL/SQL, and performance optimization SQL Server (Alternative) - T-SQL and database design experience acceptable Entity Framework … driven development (TDD) Performance optimization and scalability techniques Content Management Systems knowledge Key Responsibilities Develop and maintain full stack applications using C# .NET backend with Blazor/React frontend Design and implement database solutions using Oracle/SQL Server Collaborate with cross-functional teams including UX/UI designers and business analysts Participate in code reviews and maintain high More ❯

Automotive Technology Solutions Client : Major automotive industry leader via global consultancy partnership Technical Requirements Backend Development C# .NET Framework/Core - Extensive experience developing robust, scalable backend services RESTful API Development - Design and implementation of web APIs Microservices Architecture - Understanding of distributed systems and service-oriented architecture Frontend Development Blazor - Proficiency in Blazor Server and/or Blazor … Strong experience including hooks, state management, and modern development practices JavaScript/TypeScript - Advanced knowledge of modern JavaScript and TypeScript HTML5/CSS3 - Solid understanding of web standards, responsive design, and cross-browser compatibility Database Technologies Oracle (Preferred) - Database development, PL/SQL, and performance optimization SQL Server (Alternative) - T-SQL and database design experience acceptable Entity Framework … driven development (TDD) Performance optimization and scalability techniques Content Management Systems knowledge Key Responsibilities Develop and maintain full stack applications using C# .NET backend with Blazor/React frontend Design and implement database solutions using Oracle/SQL Server Collaborate with cross-functional teams including UX/UI designers and business analysts Participate in code reviews and maintain high More ❯

our agentic AI products. This role involves bringing our agentic workers to a diverse user base across the procurement and supply chain industry. You'll own everything from infrastructure design and automated delivery pipelines to observability and security, ensuring our systems are resilient, scalable, and cost-efficient for the world's largest supply-chain organisations. Tasks In this role … you will: Design and evolve our multi-cloud platform (Azure and AWS) using infrastructure-as-code and GitOps best practices. Build and maintain high-throughput Kubernetes clusters (EKS) with secure networking, service mesh, policy enforcement, and self-service tooling for application teams. Craft robust CI/CD pipelines that deliver containerised services from commit to production with automated testing … in Python, Go, or Java with clean code principles, test coverage, and performance awareness. Service Architecture : experience building and operating high-availability, distributed systems (microservices and event-driven). API Design : REST and gRPC, with versioning, throttling, auth, and schema validation (OpenAPI, Pydantic, Protobuf). Datastores : deep knowledge of RDBMS (PostgreSQL/MySQL), NoSQL (DynamoDB, Redis, Cassandra), and More ❯

has been making waves by providing a simple solution to a universal problem: achieving incredible video quality for meetings, streaming, and recording. We've been nominated for an Apple Design Award, featured in Microsoft's Build keynotes, and earned rave reviews from users and tech publications alike. At Reincubate, we're proud to work with a broad range of … high-quality products Value collaboration and communicate effectively within and across teams Bonus points: Experience with front-end development and web technologies, including the latest (meta)frameworks, tooling, and design principles Knowledge of API design, edge deployment architecture, and related back-end development best-practices Familiarity with CI/CD and hosting platforms, such as GCP, Cloudflare … GitHub, Azure DevOps, etc. Hands-on experience with design tools like Figma To Apply: Submit a CV that showcases your experience and personality Share a cover letter that highlights your passion for great products and why you think you'd be a good fit Tell us about what you'd want to achieve in the role and how you More ❯

practices (code quality, CI/CD, security etc). Working within a project management/agile delivery methodology. Experience in technical ownership for a product or software solution, covering design, estimation, shaping and user story/requirement creation. Documentation of solutions (e.g. architecture, configuration, release, support-handover). Collaborate and liaise with other Version 1 and customer stakeholders/… practices and modern architectural patterns, including microservices and message-driven architectures. NFR/Non-Functional requirement understanding and experience developing applications with this in mind. Application/Digital Services Design experience. Experience in software engineering practices like Code Reviews, CI/CD Pipelines and SOLID/DRY principles. Hands-on developing/coding role using the following technologies: Frontend … JavaScript/TypeScript or Angular or React or Node). Backend (Java, SpringBoot, Hibernate, Kotlin). Experience in estimation and sizing. Integration experience. API Design experience. Cloud experience. Appetite to work with emerging AI technologies. SC Eligible. Additional Information Why Version 1? At Version 1, we believe in providing our employees with a comprehensive benefits package that prioritises More ❯

features and help us responsibly weave AI (LLMs, RAG) into the user experiencealongside peers who already experiment with Pinecone, LangChain and VertexAI. As a senior fullstack engineer you will design, build and operate userfacing features endtoendUI components, APIs, data models and infrawhile mentoring teammates and shaping architecture. Roughly 7080% of your time will focus on core product work; the … empowered to own code, propose improvements and understand how your work impacts our users. You will be: Writing TypeScript dailyUI, serverside APIs, tests and DevOps scripts. Designing data models, API contracts and caching strategies. Investigating user issues, profiling performance and automating fixes. Exploring AI techniques (prompt design, retrieval strategies) as part of feature work. You wont be: Peoplemanaging … metrics. About you This is a great fit if you Have 6+years building production web apps (React + Node) with strong testing and TypeScript skills. Enjoy endtoend ownershipUI polish, API design, data modelling and deployment. Are curious about LLMs/agentic workflows and have tinkered or shipped small features already. Value pragmatic solutions, measurable impact and clean, maintainable More ❯

You will contribute to architectural decisions, and help scale a data-intensive, high-impact product. Key Responsibilities Architect, build, and maintain web applications and APIs using Go , and Python Design scalable backend systems to process data from various integrations. Lead technical decisions and contribute to software architecture planning Build secure, high-performance cloud-native services (preferably on GCP ) Implement … engineering best practices, code quality standards, and development processes Required Qualifications 3+ years of full stack development experience in production environments Advanced proficiency inReact, Typescript,GoorPython Deep understanding of API design (REST, SOAP) Experience working withcloud platforms-GCP strongly preferred, AWS or Azure acceptable Strong database knowledge (PostgreSQL, Firestore, MongoDB, BigQuery, or similar) Demonstrated experience scaling distributed systems More ❯

and production-grade digital solutions for the financial services sector. This is a hands-on engineering role ideal for someone with deep expertise in Java, Spring Boot, and secure API design , and who thrives in fast-paced, client-facing environments. The successful candidate will play a key role in shaping backend architecture, driving secure service delivery, and contributing … to engineering standards across engagements. Key Responsibilities Design and develop backend services using Java and Spring Boot Architect and implement secure APIs using OAuth2, FAPI, OpenID Connect Ensure backend services are performant, scalable, and resilient Collaborate with frontend, DevOps, and QA teams to deliver integrated solutions Participate in architecture reviews, technical design sessions, and stakeholder workshops Champion modern … architectures and messaging systems (e.g., Kafka) Exposure to Infrastructure as Code (e.g., Terraform, Ansible) Familiarity with observability tools and performance tuning Ability to mentor junior engineers and lead backend design initiatives Engagement Model Outside IR35 12-month initial contract with potential for extension or permanent employment Hybrid working model: minimum 2 days onsite in London, with flexibility to travel More ❯

styles. You've used tools like React Testing Library, Vitest, and Playwright to write reliable, maintainable tests for front-end applications. You're well-versed in software architecture and API design, and capable of delivering secure, scalable, and high-performance systems. You understand development frameworks, tooling, and best practices across the stack. You apply software principles and design More ❯

and manufacturing across advanced industries. By enabling high-fidelity, multi-physics simulation through AI inference across the entire engineering lifecycle, PhysicsX unlocks new levels of optimization and automation in design, manufacturing, and operations empowering engineers to push the boundaries of possibility. Our customers include leading innovators in Aerospace & Defense, Materials, Energy, Semiconductors, and Automotive. We are about to take … and career goals.What you will do Work closely with our simulation engineers, data scientists and customers to develop an understanding of the physics and engineering challenges we are solving Design, build and test data pipelines for machine learning that are reliable, scalable and easily deployable Explore and manipulate 3D point cloud & mesh data Own the delivery of technical workstreams … Create analytics environments and resources in the cloud or on premise, spanning data engineering and science Identify the best libraries, frameworks and tools for a given task, make product design decisions to set us up for success Work at the intersection of data science and software engineering to translate the results of our R&D and projects into re More ❯

Join Rainbird as a Software Engineer and become the critical link between cutting-edge AI technology and real-world business impact. You'll design and deliver seamless integrations between our award-winning low-code SaaS platform and diverse client ecosystems, rapidly transforming complex challenges into tangible AI-driven solutions. If you thrive in dynamic environments and want to shape … hybrid Neuro-Symbolic AI model. You will be part of a fast-moving agile team that ships production code regularly and values engineering excellence and continuous learning. You will: Design, develop, and maintain scalable features for the Rainbird platform Work across our frontend (React) and backend (Node.js, Go) codebases while exercising autonomy in technical decision-making and task prioritisation … Contribute to DevOps practices, improving CI/CD pipelines and IaC deployment processes Collaborate with product and design functions to deliver intuitive user experiences Participate in code reviews and architecture discussions to uphold engineering best practices Help troubleshoot platform issues and assist in resolving infrastructure incidents Continuously seek ways to improve system performance, stability, and security Support internal innovation More ❯

take ideas from concept to production with ownership and autonomy. If you're excited about problem-solving and working on tools developers love, this role is for you. Responsibilities Design, develop, and maintain full stack applications using modern frontend and backend technologies. Build, deploy, and manage backend services using Appwrite, including databases, authentication, file storage, and functions. Develop responsive … technologies relevant to the role, especially within the Appwrite ecosystem. Requirements 3+ years of experience in full stack development. Hands-on experience with backend platforms or services, including setup, API integration, database management, and serverless/cloud functions. Proficiency in at least one modern frontend framework: React, Vue.js, or Angular. Experience with Node.js, Express, or similar backend runtimes. Familiarity … with Docker, Kubernetes, serverless environments, and container orchestration (optional but a plus). Experience with Git/GitHub and agile development workflows. Strong understanding of RESTful API design, authentication mechanisms (OAuth, JWT), and security best practices. Excellent problem-solving skills and a proactive mindset. 100% Remote Our entire company is distributed, so we take remote work seriously. If 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 ❯

organisation, and ecosystems to make an impact that matters to our clients and to society. We're a new type of creative digital consultancy that fuses strategy, tech and design to identify where businesses need to be, then get them there. Fast. Want to help us shape the future? We're looking for experienced engineers to work with our … it mattersmost . Connect to your opportunity As a technical architect, you will play a crucial role in our agile project delivery by collaborating with cross-functional teams to design and implement flexible, scalable, and secure technical solutions. You will work closely with client stakeholders to understand requirements, provide technical leadership, and ensure that the architecture aligns with agile … shape the future. Willing and eligible to apply and obtain UK security clearance to Security Check (SC) level, if not holding an existing clearance Extensive experience in digital architecture design and implementation Strong knowledge of public sector regulations and compliance requirements Proficiency in cloud technologies and architecture (e.g. AWS, Azure, Google Cloud) Expertise in software development methodologies and best More ❯

organisation, and ecosystems to make an impact that matters to our clients and to society. We're a new type of creative digital consultancy that fuses strategy, tech and design to identify where businesses need to be, then get them there. Fast. Want to help us shape the future? We're looking for experienced engineers to work with our … it mattersmost . Connect to your opportunity As a technical architect, you will play a crucial role in our agile project delivery by collaborating with cross-functional teams to design and implement flexible, scalable, and secure technical solutions. You will work closely with client stakeholders to understand requirements, provide technical leadership, and ensure that the architecture aligns with agile … shape the future. Willing and eligible to apply and obtain UK security clearance to Security Check (SC) level, if not holding an existing clearance Extensive experience in digital architecture design and implementation Strong knowledge of public sector regulations and compliance requirements Proficiency in cloud technologies and architecture (e.g. AWS, Azure, Google Cloud) Expertise in software development methodologies and best More ❯