26 to 50 of 143 API Design Jobs in the UK excluding London

Lead Application Architect

Hiring Organisation
BESTWAY WHOLESALE LIMITED
Location
North West London, London, United Kingdom
Employment Type
Permanent
Bestway is modernising its application estate towards cloud-native architecture. We are looking for a hands-on Lead Application Architect to own application-level design, define our engineering standards, and introduce AI-assisted development practices across the team. You will sit between our Solution Architects, who define high-level … designs, and the development team, who deliver them. You will turn HLDs into well-documented, implementable designs (Low-Level Design) and make sure the code that results is consistent, secure and maintainable. About Bestway Bestway Group is a diversified multinational family owned business with annualised turnover in excess ...

AWS Integration Architect

Location
Birmingham, England, United Kingdom
Identity, Gateway): deploying and securing MCP servers and agents Agent governance: AgentCore Registry, AgentCore Policy and Amazon Verified Permissions, including Cedar policy authoring Amazon API Gateway and AWS Lambda: API design, usage plans, API keys, throttling Containers: Docker, Amazon ECS on Fargate and Amazon ECR Data … integration via OData services experience Amazon Quick Suite and/or Microsoft Copilot Studio as agent clients Strands Agents SDK and AgentCore Memory API developer portal #J-18808-Ljbffr ...

Lead Backend Engineer (Python) New Exeter, Bristol

Location
Exeter, England, United Kingdom
most impactful problems. The role The Lead Engineer role is centred on deep expertise in Python and leadership. The core focus is driving the design and development of our backend systems, establishing and maintaining engineering standards, and supporting a high-performing team. This position operates within a fast-paced … machine-learning-driven environments. What you’ll do As a Lead Engineer (Backend) at digiLab, you will be responsible for: Leading the architectural design, development, testing, and deployment of backend services for current and future products Taking ownership of backend system design, ensuring scalability, security, robustness, and maintainability. ...

Senior Full Stack Developer

Location
Leeds, England, United Kingdom
Overview Senior Full Stack Developer role in Leeds. Hybrid work arrangement with two days in the office each week. You will design, build, and deliver high-quality solutions across the full technology stack in a cloud-native environment, collaborating with Product, Delivery, and Platform teams to enable secure, scalable … user-focused applications. Responsibilities Design, develop, and maintain scalable full-stack applications across the front end, back end, APIs, and data integrations. Lead the end-to-end delivery of features from technical design and architecture through development, testing, and deployment. Produce clean, maintainable, and well-tested code following ...

Senior Software Engineer, Reference Data Platform (Python/Oracle) - AVP

Location
Belfast City District, Northern Ireland, United Kingdom
Senior Programmer Analyst (C12/AVP) to join our Master Reference Data (MRD) technology organization. In this role, you will be responsible for the design, development, testing and implementation of the Operating Model & Aritifical Intelligence (OMAI) Fusion application - a critical enterprise platform responsible for centralizing, mastering and distributing high … performance data processing pipelines, optimize complex database architectures and deliver resilient software solutions that support mission-critical enterprise operations. Key Responsibilities Application & Pipeline Development: Design, code, test and implement robust backend services, ETL data pipelines and batch/real-time processing components for the Fusion platform using Python. Database ...

Senior Fullstack Engineer (Go/React)

Location
Leeds, England, United Kingdom
openly, and taking pride in delivering software that makes a real business impact. What You’ll Do As a Senior Fullstack Engineer, you will: Design, build and maintain scalable, secure and resilient backend systems using Go, alongside rich, responsive frontends built with React. Lead technical design and architectural … Data access in Go using tools such as database/sql, sqlx, sqlc or GORM Authentication and authorisation including OAuth2, OIDC and JWT REST API design and implementation, with exposure to gRPC and Protocol Buffers Microservices and distributed system design SQL databases with strong query optimisation skills ...

Senior Fullstack Engineer (Go/React)

Location
Manchester, England, United Kingdom
openly, and taking pride in delivering software that makes a real business impact. What You’ll Do As a Senior Fullstack Engineer, you will: Design, build and maintain scalable, secure and resilient backend systems using Go, alongside rich, responsive frontends built with React. Lead technical design and architectural … Data access in Go using tools such as database/sql, sqlx, sqlc or GORM Authentication and authorisation including OAuth2, OIDC and JWT REST API design and implementation, with exposure to gRPC and Protocol Buffers Microservices and distributed system design SQL databases with strong query optimisation skills ...

Senior Fullstack Engineer (Go/React)

Location
City of Edinburgh, Scotland, United Kingdom
openly, and taking pride in delivering software that makes a real business impact. What You’ll Do As a Senior Fullstack Engineer, you will: Design, build and maintain scalable, secure and resilient backend systems using Go, alongside rich, responsive frontends built with React. Lead technical design and architectural … Data access in Go using tools such as database/sql, sqlx, sqlc or GORM Authentication and authorisation including OAuth2, OIDC and JWT REST API design and implementation, with exposure to gRPC and Protocol Buffers Microservices and distributed system design SQL databases with strong query optimisation skills ...

Senior Cloud Software Developer

Location
Cambridge, England, United Kingdom
industrial companies. Job Title: Senior Cloud Software Developer Location: Cambridge, United Kingdom (Hybrid) Employment Type: Full-time Join AVEVA’s Core Services team to design and implement secure, resilient cloud platform capabilities using Microsoft Azure. This Senior-level role is suited to an experienced developer with a strong record … delivering complex technical solutions and an interest in cloud development. You will work as part of an agile team, contribute to design decisions, build high-quality services, and use modern engineering practices, including AI-assisted development tools, to improve productivity and software quality. Key responsibilities Design, develop ...

Lead Software Developer

Location
Leatherhead, England, United Kingdom
sustainability PURPOSE OF JOB: We are looking for a proactive, product-minded C# Developer to join our small, agile engineering team. The role will design, build and support secure, scalable applications across the full technology stack, with a strong focus on clean architecture, test-driven development and reliable delivery. … hats, learning new technologies and collaborating closely with product managers, designers and engineers to deliver user-centred solutions and drive technical excellence. KEY RESPONSIBILITIES: Design & Develop: Build and maintain backend services in C# using .NET Core/.NET 9, with a focus on clean architecture, scalability and maintainability. Full ...

Solutions Architect

Hiring Organisation
Euro Car Parks
Location
Islington, Norfolk, UK
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 ...

Platform Lead – Data Availability, API & Integration

Location
Luton, England, United Kingdom
Description - Platform Lead – Data Availability, API & Integration (17454) Job Description Platform Lead – Data Availability, API & Integration ( 17454 ) Description At easyJet, we are transforming Airline Operations through modern product-led technology, operational excellence, automation, data, and AI-enabled capabilities. The Airline Operations Platform serves as the single point … critical crew, flight planning, network control, and engineering systems like AIMS, TOPS, LIDO, and AMOS. We are seeking a visionary Platform Lead – Data Availability, API & Integration to join our platform leadership team. In this critical role, you will own the integration strategy and data availability capability end to end. ...

Full Stack Software Engineer

Location
Royston, England, United Kingdom
software for bioprocessing products used by pharmaceutical and biotechnology customers. You will contribute across the software development lifecycle, from requirements gathering and prototyping through design, development, testing, documentation, and release, helping to create solutions that support better health for more people. Based at our site in Royston (Hertfordshire), with … software functionality in collaboration with Product Management, customer feedback and internal development teams Translate requirements into sustainable software solutions through prototyping, clear software design and active participation in design reviews Architect and develop modern software applications and web components using technologies such as C#, .NET, TypeScript and React ...

Sr. Software Engineer

Location
Glasgow, Scotland, United Kingdom
engineering team, which builds the shared technology layer behind Barclays digital experiences. We are building a UI platform that is AI-native by design, where components, tokens, and patterns are delivered through tooling and APIs, not just code. This role leads the team shaping how digital experiences are built … Engineer - UI Platform Lead, you must have the following essential skills; React and TypeScript in a library or platform context (not just application code Design token architectures (DTCG, Style Dictionary, or similar) and the tooling that transforms tokens across platforms Building integrations between a platform and external tools (design ...

Senior Technical Manager (External Manufacturing)

Location
Ware, England, United Kingdom
approaches for re-use across products, sites and external partners. The role leads end-to-end outcomes from opportunity shaping and business case through design, delivery, adoption, transition to service and value realisation. Location: The successful applicant can be based at GSK HQ (London) or at the Ware (Hertfordshire … wide benefits and life at GSK we would suggest looking at our webpage Life at GSK | GSK. AGTech Skills Application Integrations Application Programming Interface (API) Security CI/CD Cloud Engineering Configuration Management (CM) Database Management Data Engineering Data Integration Front-End Development Internet of Things (IoT) Mobile Development ...

Senior Technical Manager (External Manufacturing)

Hiring Organisation
GSK
Location
Hertfordshire, United Kingdom
Employment Type
Full Time
approaches for re-use across products, sites and external partners. The role leads end-to-end outcomes from opportunity shaping and business case through design, delivery, adoption, transition to service and value realisation. Key Responsibilities (include..,): Lead the global External Manufacturing digital & technology roadmap, aligning CMC/NPI, technology … benefits and life at GSK we would suggest looking at our webpage Life at GSK | GSK . #AGTech Skills Application Integrations, Application Programming Interface (API) Security, CI/CD, Cloud Engineering, Configuration Management (CM), Database Management, Data Engineering, Data Integration, Front-End Development, Internet of Things (IoT), Mobile Development ...

Junior Solution Architect

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
sector clients, helping to deliver our client services to the highest standard. The role will involve working with multiple business stakeholders, helping them to design business solutions which will then be implemented by the delivery teams. As a Junior Solution Architect, you will undertake structured analysis of technical issues … translating this analysis into designs that describe a solution. You will be consulted on design and can provide design patterns. You will identify the deeper issues that need fixing and look for opportunities to collaborate and reuse components, communicating with both technical and non-technical stakeholders. You will ...

Software Engineer (Golang/iOS)

Hiring Organisation
ARM
Location
Bristol, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £800/day Inside IR35 (Negotiable Market rate)
scale. This role combines backend engineering, cloud-native development and iOS framework development, giving engineers the opportunity to work across Go microservices, Kubernetes infrastructure, API platforms and reusable iOS SDKs. On the job responsibilities Designing and developing REST and gRPC APIs used by digital products. Building scalable microservices using … across the wider business. Supporting engineering best practice, code quality and technical standards. Key Skills Backend Development Golang (Go) REST APIs gRPC Microservices architecture API design and versioning iOS Development Swift iOS Frameworks SDK Development Swift Package Manager Mobile security and accessibility Cloud & Platform Engineering Kubernetes Docker Helm ...

Senior Backend Engineer Node.js & AI

Hiring Organisation
Adria Solutions
Location
Manchester, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£85,000
platform itself, with opportunities to deliver features such as intelligent assistants, process automation and document processing. Youll take ownership of features from design through to production, working closely with product, design and engineering colleagues. Key responsibilities Build and maintain backend applications using Node.js. Develop APIs, database services … customer experiences and business processes. Own implementation, testing, deployment and ongoing support. Contribute to architecture, code reviews and engineering standards. Work collaboratively across product, design, platform and payments teams. What were looking for At least five years commercial software development experience. Strong experience developing Node.js backend systems. Proven API ...

Back End Developer (Java)

Location
Ipswich, England, United Kingdom
will develop secure, scalable, and high-performance backend systems that enable seamless integration with MACH’s cutting-edge solutions. Expertise in backend development, API design, and blockchain technologies will be critical to your success. Responsibilities include Design, develop, and maintain robust backend systems for MACH’s blockchain ...

Lead Software Engineer - Java & Go - Chief Technology Office

Location
Glasgow, Scotland, United Kingdom
technology solutions across multiple technical areas within various business functions in support of the firm's business objectives. Job responsibilities Execute creative software solutions, design, development, and technical troubleshooting with the ability to think beyond routine or conventional approaches to build solutions or break down technical problems Develop secure … respect Required qualifications, capabilities, and skills Formal training or certification on software engineering concepts and advanced applied experience Hands-on practical experience delivering system design, application development, testing, and operational stability Demonstrated proficiency in software applications and technical processes within a technical discipline (e.g., cloud, artificial intelligence, machine learning ...

Mobile Senior Lead Software Engineer

Location
Glasgow, Scotland, United Kingdom
Senior Lead Mobile Software Engineer at JPMorganChase within Asset & Wealth Management's International Private Bank Technology organisation, based in Glasgow, you will design, build and improve the observability foundations of native iOS and Android applications for J.P. Morgan Online International. You will bring advanced technical expertise in mobile engineering … agreed technical direction. This is a hands-on technical leadership role. You will contribute directly to production code across both mobile platforms, solve difficult design and operational problems related to app health, performance and reliability, and guide other engineers through substantive technical feedback. Working with engineering leadership, business ...

Senior AI Software Engineer

Location
Knutsford, England, United Kingdom
Description Purpose of the role To design, develop and improve software, utilising various engineering methodologies, that provides business, platform, and technology capabilities for our customers and colleagues. Accountabilities Development and delivery of high-quality software solutions by using industry aligned programming languages, frameworks, and tools. Ensuring that code … secure coding practices to mitigate vulnerabilities, protect sensitive data, and ensure secure software solutions. Implementation of effective unit testing practices to ensure proper code design, readability, and reliability. Vice President Expectations Vice President Expectations To contribute or set strategy, drive requirements and make recommendations for change. Plan resources, budgets ...

Senior Software Engineer, Core AI Services

Location
Cambridge, England, United Kingdom
passionate Senior Software Engineer to join our Core AI Services team at the forefront of industrial AI Innovation. In this role, you will help design, develop, and scale AI-enabling platform services, agentic workflows, and public APIs that are secure, reliable, and cloud-native. These services will … passion for keeping up with the latest AI engineering patterns and practices, eager to translate emerging tech into reliable, enterprise-ready software. Key Responsibilities: Design, build, and maintain scalable, fault-tolerant cloud-native services on Microsoft Azure. Develop secure, well-documented public APIs and SDKs for consumption by internal ...

Senior Software Engineer - Python New Exeter, Bristol

Location
Exeter, England, United Kingdom
environment. The role: As a Senior Software Engineer (Backend) at digiLab, responsibilities include:: Collaborate with a cross-functional team to help lead on the design, development, and maintenance of high-quality software solutions Contribute to architectural design, development, testing, and deployment of software applications Utilise expertise in Python … build scalable, secure systems Apply security best practices throughout the software development lifecycle Foster a collaborative, learning-oriented environment within the team Implement software design patterns, SOLID principles, and architectural best practices Demonstrate a deep understanding of CI/CD pipelines and ensure efficient deployment processes Apply site reliability ...