126 to 150 of 395 API Design Jobs in England

Lead Java Modernization Engineer - London, Wembley

Hiring Organisation
Adecco
Location
Wembley, London, United Kingdom
Employment Type
Permanent
Salary
£75000 - £85000/annum + Benefits
just familiarity, but production ownership. Azure Integration: Proven experience building applications that consume Azure-native services, including Azure Key Vault for secrets, Azure Storage API, and Azure Service Bus for event-driven messaging. DevOps Mindset: Solid understanding of the full CI/CD lifecycle; comfortable reading and contributing … Dockerfiles and GitHub Actions YAML workflows - not as a DevOps engineer, but as a developer who understands the pipeline their code flows through. API Mastery: Deep expertise in RESTful API design principles, OAuth2 authentication flows (including FusionAuth integration), and DMARC-compliant transactional email logic via SendGrid. Duties ...

Senior Software Engineer, Python/Typescript

Location
Cambridge, England, United Kingdom
drive an agent, validate its output, and ramp on an unfamiliar codebase with an agent helping you. What are the responsibilities of the role? Design and build full stack web applications to support end-to-end automation and test infrastructure Integrate AI capabilities including LLM-driven experiences in existing … cases Collaborate with cross-functional teams to define and deliver external partner-facing and internal tooling Architect and own technical solutions and designs, evaluating design alternatives and trade-offs to deliver pragmatic, scalable, reliable, and maintainable solutions Create and maintain requirement and technical documentation, clearly defining user requirements, expected ...

Remote Backend API Engineer - Python, Cloud PBX

Location
West of England, England, United Kingdom
Intermedia is seeking a Backend API Services Developer to design and implement scalable backend services for our cloud-hosted PBX platform. The role blends pragmatic problem solving with strong API design, focusing on reliability and observability. The role is primarily remote with occasional visits to Bristol … London. You will work in a Dev & Engineering team responsible for API and database backends, with opportunities to influence architecture and wire up CI/CD and test automation across #J-18808-Ljbffr ...

Senior Java Software Engineer

Location
Wakefield, England, United Kingdom
some of the largest and most respected players across the wealth management industry. What You’ll Do Build Agentic Systems Contribute to the design and delivery of agentic systems: workflows where AI plans, executes, and iterates toward outcomes rather than simply responding to requests Build and ship production-quality … solutions as part of a squad working on real efficiency and automation problems with direct business impact Participate in the full delivery lifecycle: design discussions, development, testing, deployment, and iteration Apply AI-Native Development Practices Use AI-assisted development tools, including code generation, prompt engineering, and agentic frameworks ...

Senior Software Engineer- Python

Location
Manchester, England, United Kingdom
Raising the bar across software (typing, testing, observability, tooling, and thoughtful refactors), tooling, and ways of working What you'll do Design, build and operate the Python backend services behind Asset Backed Trading Own event driven flows from trigger to dispatch: queues, lambdas, events, and the Flex API … these areas will help. Core skills Strong Python experience Experience building and operating backend services in production Comfort with cloud platforms, ideally AWS (Lambda, API Gateway, SQS, EventBridge, DynamoDB, S3) API design and domain modelling for complex business workflows Writing robust, typed, well tested code (pytest ...

Cloud Software Engineer

Location
Mansfield, England, United Kingdom
Deep Sea Electronics is a global leader in the design and manufacture of generator controllers, automatic transfer switch controllers, battery chargers, and vehicle and off-highway control systems. With over 200 employees across four continents, we supply our products to customers in more than 150 countries, both directly from … tooling in one or more of PHP, Golang, NodeJS (TypeScript) or C# Maintain and extend WebNet's MQTT broker infrastructure and WebSocket/HTTP API layers With a focus on IoT protocols and technologies, remain up to date with the latest developments and bring forward suggestions where relevant ...

Lead Full Stack Engineer

Location
Greater London, England, United Kingdom
engineering capability. Set and influence technical direction across the application stack, making pragmatic architectural decisions around areas such as SSR vs client-side rendering, API design and application architecture. Work closely with the Architecture team on low-level solution design, translating complex requirements into practical and deliverable … team members. Lead the responsible adoption of AI-assisted development tools, identifying opportunities where AI can genuinely improve engineering productivity while establishing appropriate guardrails. Design and manage Azure cloud infrastructure, working with technologies including Kubernetes, Service Bus, APIM and Key Vault. Manage Infrastructure as Code using Terraform or Pulumi. ...

Senior Engineering Manager, SVP

Location
Greater London, England, United Kingdom
Senior Engineering Manager to lead the Loan Portfolio Mitigation Application (IRIS). The successful candidate will lead a team of software developers, overseeing the design, development, and implementation of sophisticated credit risk hedge decision systems. This leadership role requires a deep understanding of financial markets, quantitative methodologies, robust software … grade solutions at scale. The ideal candidate is a practitioner-leader who does not just direct from the sidelines, but actively engages in technical design, architectural decision-making, and hands-on development. You will serve as the definitive technology authority for IRIS, owning end-to-end solutioning from requirements ...

Senior Software Developer

Location
City Of London, England, United Kingdom
senior engineering role and you'll be joining at a point where the architecture, delivery approach and product direction still matter. You'll design and ship production services, contribute to a structured strangler-fig migration, and use AI-assisted development tools such as Cursor and Claude Code as part … suit an experienced Senior Developer, or a strong Developer ready to step up in a collaborative, senior-led environment. What You'll Be Doing Design, build and support cloud-based services in .NET 10 across Azure API Management, Azure SQL and the wider Azure platform. Help modernise ...

Senior Software Developer

Hiring Organisation
Young's Employment Services Ltd
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£65,000 - £75,000 per annum, Negotiable
senior engineering role and you'll be joining at a point where the architecture, delivery approach and product direction still matter. You'll design and ship production services, contribute to a structured strangler-fig migration, and use AI-assisted development tools such as Cursor and Claude Code as part … suit an experienced Senior Developer, or a strong Developer ready to step up in a collaborative, senior-led environment. What You'll Be Doing Design, build and support cloud-based services in .NET 10 across Azure API Management, Azure SQL and the wider Azure platform. Help modernise ...

Senior Software Developer

Hiring Organisation
Youngs Employment Services
Location
WC2H, Covent Garden, Greater London, United Kingdom
Employment Type
Permanent
Salary
£65000 - £75000/annum Bonus
senior engineering role and you'll be joining at a point where the architecture, delivery approach and product direction still matter. You'll design and ship production services, contribute to a structured strangler-fig migration, and use AI-assisted development tools such as Cursor and Claude Code as part … suit an experienced Senior Developer, or a strong Developer ready to step up in a collaborative, senior-led environment. What You'll Be Doing Design, build and support cloud-based services in .NET 10 across Azure API Management, Azure SQL and the wider Azure platform. Help modernise ...

Software Engineer (Cloud)

Location
Greater London, England, United Kingdom
will develop our suite of security-focused cloud services and infrastructure. You’ll have the opportunity to learn, grow, and directly contribute to the design and implementation of scalable, reliable, and secure systems. You’ll collaborate closely with the rest of our engineering team to design APIs, build … ideal for an early-career engineer with a few years of industry experience who is interested in a high-growth environment. Key Responsibilities Design, build, and maintain cloud infrastructure and cloud-based services and APIs to support the functionality and scalability of our platform Contribute to the development ...

Product Engineer (Internal tools & apps)

Hiring Organisation
Hackajob Ltd
Location
London, United Kingdom
Employment Type
Permanent
Slack and React: the agents people talk to and the apps they click through, built in TypeScript. And you don't stop there. From API and MCP design to infrastructure on Vercel, AWS, Supabase, and BigQuery, plus the agents that work across the stack, you own complete features … software factory. What you'll bring 5+ years of experience building applications or tooling that automate human workflows Full-stack experience across the board: API design, databases, async workflows and background jobs on the backend, and clean, user-friendly UX on the frontend. Being AI-native. An early ...

Legal Solutions Architect

Location
Boston, England, United Kingdom
based in any of our U.S. offices and consideration given for 100% remote candidates . Orrick Labs is seeking a Legal Solutions Architect to design, develop, and deploy custom software solutions that support legal workflows across the firm. This role will serve as Orrick Labs' primary pro-code development … objectives. Responsibilities Determine when a business problem is best solved through custom software development, low-code technologies, AI agents, or a hybrid approach, and design solutions accordingly. Build and deploy Model Context Protocol (MCP) servers that securely expose firm tools and data as needed to the firm’s internal ...

SVP - GenAI Full-Stack Engineer Lead

Location
Greater London, England, United Kingdom
organisation to build scalable developer platforms, influence engineering strategy and drive the adoption of Generative AI and modern engineering practices.### Key Responsibilities* Drive the design and delivery of enterprise-scale applications supporting critical business functions and large user populations.* Remain hands-on with software architecture, system design, code … containers, microservices and event-driven architectures.* Strong understanding of distributed systems, resiliency patterns, scalability and performance engineering.* Strong knowledge of SQL and NoSQL technologies, API design and integration patterns.* Excellent communication and stakeholder management skills with the ability to influence technology decisions across numerous teams and organisations.* Growth ...

Senior Full-Stack Engineer

Location
Greater London, England, United Kingdom
engineering hires. You will report directly to the CTO and work alongside a small group of senior engineers. The work as it is today Design, build and ship features end to end, from data model and API design through to frontend implementation. Design and build robust … ideally in TypeScript, Node.js and React. We are open to adjacent stacks where the fundamentals are strong. Substantial experience of system design and architecture, including systems that have been in production long enough to show their weaknesses. We will ask you to talk us through something you have designed ...

Product Manager

Hiring Organisation
Randstad Technologies
Location
Manchester, Lancashire, United Kingdom
Employment Type
Full-Time
Salary
£70.00 - £75.00 per hour
Lead Product Manager - API & Platforms Location: Manchester, UK, Only 1 or 2 days to office Role Overview We are looking for a Lead Product Manager to own and scale our core API platforms, backend microservices, and data tools. You will lead cross-functional engineering teams to build high … performance systems, improve developer experience, and integrate AI/data solutions across our global platform. Key Responsibilities Platform & API Strategy: Own the roadmap and backlog for core APIs and microservices, ensuring high availability, speed, and scalability. Technical & AI Execution: Work with engineers and data teams to design data ...

Senior Full-stack Engineer, Core AI Services

Location
Cambridge, England, United Kingdom
/Full-stack Engineers 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 and maintain clean, responsive web user interfaces and developer tools using ...

Back-end Engineer (Senior)

Location
Bracknell, England, United Kingdom
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 ...

Software Engineering Manager

Location
Bristol, England, United Kingdom
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 ...

Software Engineer

Hiring Organisation
Hackajob Ltd
Location
Knutsford, Cheshire, North West, United Kingdom
Employment Type
Permanent
enterprise adoption. Contributing to event standards, patterns, and best practices, enabling teams across the organisation to build confidently on the platform. Making considered design choices that balance scalability, resilience, security, and developer experience. Close collaboration with product, architecture, and engineering teams to align platform capabilities with business and regulatory … deployment pipelines. Some other highly valued skills may include: Hands-on Java engineering experience, building high-quality, maintainable, and well-tested systems, including the design and delivery of distributed systems using event-driven and asynchronous communication patterns. Practical experience with microservices and API design, with a clear ...

Senior Kotlin Developer

Hiring Organisation
Hackajob Ltd
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
using Kotlin and Javaon the AWS Cloud platform, following best practice. In addition to Kotlin, this project utilises Typescript/Node.js using the GOV.UK Design System.Kubernetes and Docker to schedule and run services hosted on AWS Cloud. You'll join a Scrum Team of cross-functional skills working … 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 principals Hands-on developing/coding role ...

Hybrid API & Java Microservices Engineer - Spring Boot

Location
Leeds, England, United Kingdom
Yorkshire Building Society Group is seeking a Software Development Engineer for API & Microservices to design, develop and test Java Spring Boot microservices that support digital platforms in a hybrid Leeds/Bradford environment. You will work with API design, pipelines, and monitoring while collaborating with tech ...

Senior Product Engineer

Location
Greater London, England, United Kingdom
customer moments where AI can create magic, prototype them, and bring them to life. Own delivery end-to-end. Pick up a problem, design the solution, ship the work wherever the feature lives, and see it through to production. Own on-call. Be on the rotation, and stand behind … just code. You measure your work by what changed for the customer, not the lines of code shipped. Production minded. Solid grasp of API design, observability, scaling, reliability, and security. Care about craft. Clean APIs, attention to detail, and how the system feels to work in. Comfortable ...

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 ...