76 to 100 of 276 API Design Jobs in the UK

Title: Java Developer Rate: £400 (Inside IR35) Duration: 12 Months Location: Remote Clearance: BPSS Stages: 1 Stage Must Have Government Experience Key Responsibilities Design and develop high-quality Java applications and microservices. Build and maintain RESTful APIs and Back End services. Collaborate with architects, business analysts, testers, and DevOps … engineers. Contribute to technical design discussions and architectural decisions. Implement automated testing and support a TDD approach. Participate in code reviews and promote engineering best practices. Develop and deploy applications using cloud-native technologies. Troubleshoot and resolve production issues. Ensure solutions meet security, performance, and accessibility requirements. Essential Skills ...

technologies, cloud‐native engineering, and microservices architecture. The successful candidate will contribute across the full software development lifecycle, working within agile feature teams to design, build, test and deploy scalable applications supporting critical business services. Responsibilities: Design, develop and maintain scalable full-stack applications. Build high-quality RESTful … Stack Engineering. 5+ years' experience with Java development. 5+ years' experience with React and/or React Native. Strong experience with Spring Boot. REST API design and development. Microservices architecture. SQL and database technologies. TDD, BDD and integration testing practices. CI/CD pipeline implementation. AWS cloud engineering. ...

built to last and built to scale.* **Drive Scalability & Reliability.** Lead the engineering effort to make RoD elastically scalable and enterprise-grade reliable. Design for high availability, graceful degradation, and zero-downtime deployments. Define SLOs, own the SRE practice for the platform, and be accountable when things need fixing. … fully understood at all times. You will set the standard and ensure the team can operate with confidence.* **Establish End-to-End Testing.** Design and champion a robust E2E testing strategy across the platform. From contract testing at service boundaries to full integration and regression suites, you will ensure ...

core requirement is someone who understands what engineering for performance actually means and has the track record to prove it. Key Responsibilities - Design, build and deliver high-performance Java microservices using Spring Boot in a production cloud environment - Architect and evolve event-driven and low-latency system components, including … messaging and data pipeline design - Own technical decision-making across your domain, from API design and data modelling through testing, observability and production deployment - Integrate with AWS cloud infrastructure SQS, SNS, Lambda, S3 and related services, with hands-on infrastructure ownership - Drive engineering quality through code review ...

Treasury foundation that can scale with us. 🎯 Your Responsibilities in this Role Own key architecture and implementation decisions for the collections & treasury foundation Lead design work (RFCs, diagrams, API and system specs) to align on solutions before building Partner with PMs and stakeholders to translate business intent into … technically sound requirements Design and build customer-facing and internal APIs to support collections and payment strategies Build reliable infrastructure for vIBAN provisioning and collections orchestration Drive engineering quality across API standards, testing strategy, code review bar, and maintainability Manage delivery by breaking down complex work, sequencing milestones ...

deliver the roadmap for horizontal platform capabilities serving all private markets asset classes - including core data services, cross-fund analytics, workflow automation, and API infrastructure. Lead initiatives in AI/ML-enabled product features, including document extraction (e.g., fund documents, LP agreements, investment memos), NLP-powered search, and intelligent … reporting cycles. Demonstrated experience owning platform-level or infrastructure product workstreams with high technical complexity. Familiarity with data architecture concepts: data modeling, ETL pipelines, API design, and event-driven systems. Experience with agile development methodologies; strong proficiency with product management tools (Jira, Confluence, Productboard, or similar). Exceptional ...

Ireland providing specialist services to a wide range of blue-chip clients. The role We are seeking technical polyglots who enjoy both technical architectural design, hands-on coding and peer reviews, though also like the idea of the equally important social/client-facing aspect of the role. … development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority (TDA) for delivery of technical stories and produce technical documentation artefacts to support the delivery process. Main Responsibilities Duties will include: The design ...

remote engineering team focused on building scalable, high-performance backend solutions that power modern software products. In this role, you will contribute to the design, development, and optimization of distributed systems while delivering features that have a direct impact on end users. You'll collaborate with experienced engineers … excellent opportunity for engineers who enjoy solving complex technical challenges, embracing modern development practices, and working across the full software development lifecycle. Accountabilities Design, develop, and maintain scalable backend services, microservices, and RESTful APIs capable of handling production workloads with high reliability and performance. Deliver features from initial design ...

services effectively. The role will be working closely alongside the SPM business team and technology vendors to engineer solutions supporting their strategic roadmap. Responsibilities: Design, build, and improve modern application services that support a strategic business platform, focusing on quality, maintainability, and performance. Develop backend services and APIs supporting … strong track record of delivering production systems. Strong experience building backend applications and APIs, ideally in Java. Practical experience across service‐based architecture, API design, integration patterns, and modern web application delivery. Experience contributing to modernisation or platform evolution initiatives is strongly desirable. Strong engineering discipline across testing ...

build. The Role We’re looking for Full Stack Engineers who care deeply about the craft of building software: strong typing, thoughtful API design, robust data modeling, and interfaces that are a pleasure for both users and other engineers to work with. You won’t be building … rather build something thoughtfully than ship something fragile, and we treat velocity and quality as complementary, not competing. What You’ll Do Design and build platform systems in Python (FastAPI) – from API contracts to database schema and infrastructure – and high‐quality user‐facing experiences in TypeScript and React ...

work: billing, payments, subscriber management, RADIUS‐based network authentication, and integrations with ISP billing systems and mobile money providers. We are replacing legacy, non‐API systems with a modern API platform, and real money is already flowing through the system. This is a small, high‐intensity engineering team … when they hit technical walls. You will not manage people. You will build systems. What you will own Payments domain: SasaPay collections integration (C2B API, STK push, IPN handling), revenue split engine (per‐partner, per‐BNG percentage logic), ChoiceBank treasury operations (withdrawals, internal transfers, OTP flows), and the payment ...

role offers the opportunity to build modern software solutions while leveraging AI-assisted development tools to accelerate engineering workflows. You will contribute to the design, development, testing, and deployment of scalable full-stack applications. The position combines backend engineering, frontend development, cloud technologies, automation, and AI-powered coding practices. … Development will be responsible for designing, developing, and maintaining reliable software solutions while using AI-assisted tools to improve productivity, quality, and engineering efficiency. Design, develop, test, deploy, and maintain scalable web applications using technologies such as Python, FastAPI, React, JavaScript, TypeScript, and Node.js. Build and maintain REST ...

occasional out-of-hours support. Ensure unit tests are implemented and fit for purpose. Research and evaluate new technologies that could benefit the organisation. Design and develop high-quality Python software that meets complex business needs. Ensure code, documentation, and testing align with engineering standards. Deliver solutions that meet … expectations, and operational reliability. Integrate products with monitoring and support tooling. Experience/Skills required: Experienced Python Developer who can make sound trade-offs, design for scale, and contribute to complex systems without over-engineering. Strong engineering judgement and real-world delivery experience. Senior-level experience designing and building ...

lineage and enabling self‐service analytics safely Enterprise SaaS integration across domains with Salesforce CRM, Dynamics 365 F&O & SAP Success Factors Strong integration design capability: Domain Driven Design, event‐based integration, API design principles, resilience patterns, operational considerations (SLAs, observability, incident readiness) Excellent stakeholder management ...

depth in fraud prevention, abuse detection, rate limiting, or bot protection to guide architectural decisions across a complex, multi‐layered fraud stack. Distributed systems design: Proven experience designing, building, and operating scalable, highly available distributed systems in a cloud‐native environment. Modern tech stack experience: Demonstrable experience with cloud … platforms (preferably AWS), containerisation (Docker, Kubernetes), and API design (gRPC, REST). Database expertise: Hands‐on experience with both relational and NoSQL databases. A people‐first approach: Deep commitment to the growth and well‐being of your team, with proven experience in coaching, mentorship, and performance management. Commercial ...

depth in fraud prevention, abuse detection, rate limiting, or bot protection to guide architectural decisions across a complex, multi-layered fraud stack. Distributed systems design: Proven experience designing, building, and operating scalable, highly available distributed systems in a cloud-native environment. Modern tech stack experience: Demonstrable experience with cloud … platforms (preferably AWS), containerisation (Docker, Kubernetes), and API design (gRPC, REST). Database expertise: Hands-on experience with both relational and NoSQL databases. A people-first approach: Deep commitment to the growth and well-being of your team, with proven experience in coaching, mentorship, and performance management. Commercial ...

across Scotland. The Role You'll play a key role in developing and supporting modern digital services, working within high-performing Agile teams to design, build and enhance secure, resilient and user-focused applications. Key responsibilities include: Developing and supporting modern software solutions using Java, Spring Boot and React. … pipelines and cloud-native deployments. Designing and implementing scalable technical solutions aligned to Digital First and GDS standards. Building reusable UI components and maintaining design systems. Developing automated testing using TDD, Playwright and Consumer-Driven Contract Testing. Troubleshooting issues across cloud-native platforms and legacy environments. Participating in code ...

Gartner® Magic QuadrantTM Leader , on a mission to govern the world’s intelligence . We deliver the industry’s most advanced platform for Any API, Any Event, and Any AI Agent , trusted by global leaders like Michelin, Roche, and Blue Yonder. Why join us? The Mission … first to bridge traditional API Management with the new frontier of AI Agent Security The Momentum : A high-growth Leader - combining market credibility with startup speed The DNA : We hire people who Hold Nothing Back - passionate builders who want to redefine digital infrastructure Don’t just watch ...

efficiency and improve transparency within the firm and across our broad community of investors and portfolio companies.BXTI is nimble and entrepreneurial – our open, iterative design processes and rapid pace of development mean that everyone on the team has the opportunity to make an impact from day one. … proficiency in C#, JavaScript (React and/or Angular), Typescript, databases (relational and/or NoSQL), and cloud technologies, preferably AWS.* Experience with RESTful API design, development, and scalable microservice architectures* Ability to develop scalable, secure, and maintainable code, with a strong background in object-oriented programming* Excellent ...

Title: Senior Cloud Software Engineer Location: Cambridge, UK - Hybrid Employment Type: Full-time Key Responsibilities Design, develop, and maintain secure, resilient features for AVEVA CONNECT Core Services Contribute to technical design and implementation decisions across cloud and service-based architectures Build and improve services using modern engineering practices … engineering productivity, code quality, and delivery Work collaboratively in an agile development team and share knowledge on cloud technologies and practices Essential Requirements Strong design and coding skills, with a record of delivering high-quality technical outcomes Experience developing microservice or service-oriented architectures Good understanding of REST API ...

core mission capabilities. You’ll work as part of empowered, autonomous DevOps teams with regular contact with end‐users to flexibly and efficiently understand, design, develop, deploy and maintain applications and services on AWS. You’ll be encouraged to identify new ways of solving problems and get to work … help you with them AWS Certification at Associate level eg Solution Architect, Developer or DevOps Expertise in microservices and API design Docker, and container runtime platforms such as Kubernetes, EKS, ECS etc Strong understand of operational concepts on AWS, particularly monitoring and observability, FinOps Utilising CI/ ...

applications while collaborating with architects, engineers and stakeholders to deliver innovative digital solutions. The Role As a Senior Software Engineer, you'll lead the design and development of modern cloud-native applications, working closely with clients to understand business requirements and translate them into robust technical solutions. … contribute to solution design, mentor other engineers, promote engineering best practices, and help shape scalable, resilient platforms built on Microsoft Azure. What You'll Be Doing Design, develop and deliver modern cloud-native applications. Build scalable, secure and resilient event-driven solutions. Develop production-quality software using .NET ...

This Role We’re hiring a senior back-end engineer who owns real problems end-to-end and shapes how the team builds, from API design and data modeling through to service implementation, production reliability, and launch. You already use AI as part of how you think, build … test, and ship. You’ll write code that moves money in production, design and modernize the backend services the platform runs on, and lead delivery of new capability as Xe rebuilds its platform layer. You’ll work in a small team with direct access to product, compliance, and operations ...

flow metrics, communicating timelines, dependencies, and risks early and transparently. Establish engineering guardrails across scope, quality, and non-functional requirements, enabling teams to design optimal solutions within them. Champion observability and operational excellence, ensuring system health, SLOs, and alerting are visible and actively managed. Partner with Tech Leads … Architects on system design and evolution, bringing structured thinking to complex, distributed environments. Foster a culture of ownership, collaboration, and continuous improvement, helping teams navigate technical and product challenges with clarity and purpose. Grow and develop engineers through coaching, feedback, hiring, and creating an environment that supports autonomy, mastery ...

contexts Use customer feedback, analytics, and direct user insights to inform technical decisions, prioritise improvements, and validate that shipped features deliver measurable value Design and implement complex data flows, API integrations, and background processing systems that handle high-volume operations reliably while maintaining system performance and data integrity … Partner with product, design, and customers to shape solutions early, translating business requirements into technical architecture while surfacing risks and opportunities that impact customer outcomes Mentor and coach other engineers, raising the bar for technical excellence through code reviews, pair programming, and architectural guidance Beyond the tech ...