1 to 25 of 45 API Design Jobs in the South East

Kong API Gateway Specialist

Hiring Organisation
Infoplus Technologies UK Limited
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£400.00 - £450.00 per day
Summary We are seeking an experienced Kong API Gateway Specialist to lead the development, implementation, and governance of our enterprise API ecosystem. This role will be responsible for establishing API governance standards, designing and managing API lifecycle processes, and driving the adoption of best practices across … integration and middleware platforms. The ideal candidate will possess deep expertise in Kong API Gateway, API management, security, integration architecture, and governance frameworks. They will work closely with enterprise architects, development teams, security teams, and business stakeholders to ensure APIs are secure, scalable, reusable, and aligned with organizational ...

Technical Product Manager

Location
Milton Keynes, England, United Kingdom
Probation: 6 months About the role As a Technical Product Manager at HUKM, you will lead the development and delivery of backend and API-driven products. You will manage development pods, translate business requirements into technical solutions, and drive execution through agile delivery. This is a hands-on technical … development pods of 15 to 20 engineers, ensuring effective collaboration and delivery Define product roadmaps, prioritise features, and maintain product backlogs for backend and API initiatives Design and document API specifications, data models, and system architecture alongside engineering teams Run sprint planning, daily standups, sprint reviews ...

Integration Architect - Java, AWS, FS - OutsideIR35

Hiring Organisation
Sanderson
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£550.00 - £600.00 per day
connectivity across the clients core systems. Key Responsibilities: Own and evolve integration architecture aligned with enterprise standards Define and govern integration patterns across teams Design and deliver event-driven, API-first, and messaging solutions (NATS, REST) Lead end-to-end integration delivery, including hands-on development (Java/… Spring) Ensure scalable, cloud-native solutions on AWS Produce architecture artefacts (blueprints, contracts, ADRs) Guide teams on best practices, API governance, and event design Engage stakeholders and align cross-team integration efforts Primary Skills: Event-driven architecture and messaging systems (NATS, pub/sub, async patterns) API ...

Solution Architect - Data & AI Specialist

Hiring Organisation
ITH Pharma
Location
Park Royal, London, Middlesex, United Kingdom
Employment Type
Permanent
Salary
£75000 - £85000/annum
experienced AI Architect who enjoys solving complex technical problems while staying close to delivery. This is a genuinely hands on role where you will design enterprise AI solutions, partner with senior stakeholders across the business and work alongside engineering teams to bring modern AI capabilities into production. … role where you can combine deep technical expertise with meaningful business impact, we would love to hear from you. ----------------------------------------- Key Responsibilities Architect Agentic Solutions: Design enterprise cloud applications, specializing in agentic AI platform components (orchestration, memory, tool integration, identity, guardrails, observability) and emerging Agentic Commerce. Lead Clients & Drive Growth ...

Senior Platform Engineer

Location
Reigate, England, United Kingdom
technical input, guidance and leadership to the team (including code quality, best practices, processes, some aspects of release management, etc.). Assist in the design and documenting of solutions meeting functional and non-functional requirements. Lead by example getting directly involved in the day-to-day delivery of work … bring Platform and controlplane engineering Practical experience designing and developing management and controlplane capabilities for lineofbusiness or SaaS applications, including stack/environment management, API design for platform services, and developer/operator UX. Experience working with or designing Azure stamp-based or scale‐unit architectures, including multi ...

Senior Software Engineer

Hiring Organisation
The Portfolio Group
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£90,000 per annum
integration layer behind a new generation of AI-powered products. This is a genuinely full-stack engineering role, combining production-grade backend development, API design, AI integrations and frontend engineering. You'll work across the full application lifecycle, designing the services and interfaces that connect AI capabilities … products customers and colleagues use every day. You'll play a key role in building MCP integrations, agent-to-agent connectivity and robust API services, while also developing responsive, accessible interfaces in React and TypeScript. What you'll be doing Own the application and integration layer of AI products ...

Principal Software Engineer

Hiring Organisation
Epicor Software Corporation
Location
Bracknell, Berkshire, UK
Employment Type
Full-time
innovative AI concepts into enterprise-grade products trusted by enterprise customers. This is a hands-on engineering role, not a management position. You will design and build, set the technical bar for production quality, and provide the architectural judgement needed to take AI-driven products from promising prototype … designing for the incident nobody planned. This matters to us more than any specific framework. Distributed-systems fluency: service boundaries, transactional thinking, multi-tenant design, API design and versioning. Strong architectural communication - able to explain, document, and defend design decisions across teams, and to review others ...

Kong API Management

Hiring Organisation
E-Solutions IT Services UK Ltd
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£400.00 - £450.00 per day
Kong API Management/API Engineer London - 5 days/week onsite Required qualifications, capabilities, and skills · Programming languages: Advanced proficiency in one or more programming languages - Golang or Lua Script. · Cloud-native operations: Practical, hands-on cloud-native experience. · API management: Professional experience with API … management technologies (e.g., Apigee, Kong, or MuleSoft). · API design: Strong understanding of the OpenAPI Specification (OAS) for RESTful APIs. · API security: Hands-on experience securing APIs at the gateway, including OAuth 2.0, OpenID Connect (OIDC), JWT validation, key-auth, and mutual TLS (mTLS). · DevOps toolchain ...

Senior Software Engineer

Location
Reading, England, United Kingdom
Engineering Lead, and fellow engineers to look after the shared in‐house components consumed by other development squads — including auth, audit, developer portal, and API gateway. You’ll be joining us at a pivotal moment! We're transitioning to a product‐driven culture where your voice and expertise will … networking) Focuses on usability, adoption, reliability, and long‐term evolution As a Senior Software Engineer, you will combine technical depth, product thinking, and systems design to ensure these shared services are robust, scalable and developer‐friendly. Product & Ownership Design, build and evolve shared application services used across multiple ...

Backend Developer

Location
Oxford, England, United Kingdom
role and a brief description of some of the key tasks to be performed. This list is not totally exhaustive. Major Responsibilities Design, develop, and maintain scalable back-end services, APIs, integration platforms, databases, and Microsoft Azure cloud-native solutions to deliver defined requirements across regulated and non-regulated … modern development tooling to maintain code quality and consistency. Develop unit, integration, and automated tests and contribute to verification evidence, code quality, and design reviews. Participate in daily stand-ups, design reviews, and collaborative team activities with internal and external teams, supporting Product Owners and Business Analysts ...

Software Engineer

Location
Milton Keynes, England, United Kingdom
building its Payment Facilitator (PayFac)/Acquiring platform and is looking for a hands-on, experienced Software Engineer to take full ownership across design, build, and delivery. This is not a traditional engineering role — there is no rigid separation between engineering and product. You will work directly alongside … product instinct to define scope and prioritise work independently. Payments or fintech exposure is required; what matters is your ability to design and build reliable, scalable systems and to move fast without sacrificing quality. A generalist mindset — able to deliver in key areas, learn others, outsource/work with ...

Full Stack Software Engineer (Senior)

Location
Bracknell, England, United Kingdom
This Role We're hiring a senior full-stack engineer who owns real problems end-to-end and shapes how the team builds, from API design and frontend experience through to backend services, 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 platform across the stack, and lead delivery of customer-facing features as Xe rebuilds its platform layer. You’ll work in a small engineering team with direct access to product, design ...

Software Architect (UK)

Location
Horsham, England, United Kingdom
negotiable depending on experience) Responsibilities and Duties The Software Architect role requires a professional who combines deep technical expertise with strategic vision to design and guide the implementation of scalable, maintainable software systems. They will be responsible for defining architectural standards, evaluating technology choices, and ensuring development teams have … software development Strong expertise in .NET development, C#, and Visual Studio Experience developing .NET based web services and distributed systems Demonstrated ability to design and implement scalable, maintainable software architectures Experience with architectural patterns (microservices, event‐driven, layered architecture, etc.) Strong understanding of software design principles (SOLID ...

Solution Architect

Hiring Organisation
Sustain Recruit
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 per annum
background and has moved into Solution Architecture over the last few years. You will work at the intersection of business and technology, helping to design practical, scalable and secure solutions across a complex enterprise application landscape. This is a hands-on architecture role where you will work closely with … practical implementation. This role would particularly suit someone with approximately 2–3 years' experience in Solution Architecture, Technical Architecture or a senior technical design role , supported by a previous career in software engineering or development. Key Responsibilities Translate business requirements into clear and practical technical solution designs. Produce architecture ...

Senior Software Engineer

Hiring Organisation
Lynx Recruitment Ltd
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£75,000 - £105,000 per annum
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 ...

C# Software Engineer / Team Lead

Hiring Organisation
Client Server
Location
Bracknell, Berkshire, South East, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£95,000
development, delivery and production operations whilst remaining hands-on, writing production code and tackling the most technically complex problems. You'll own system architecture, API design, technical decisions, design reviews and code quality and partner with Product Managers on roadmaps, delivery plans and priorities. Providing technical leadership … within a software engineering team You have strong backend development skills with C# .Net (would also consider other OO languages) You have strong system design experience, particularly distributed systems and microservices You have frontend experience with Vue.js, React or modern Angular You have a good knowledge ...

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 ...

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 ...

Infrastructure Developer

Hiring Organisation
Ncounter
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£110,000 - £130,000 per annum
services and automation that connect complex infrastructure environments. The wider goal is to remove manual infrastructure processes and replace them with reliable, self-service, API-driven services. You will design and develop integrations across areas including bare-metal compute, networking, storage, cloud and workload platforms. A major part … role will involve building API services around a central CMDB, creating a reliable source of truth that can drive automated provisioning, configuration and infrastructure lifecycle management. Responsibilities will include: • Building production-grade services and automation primarily in Python • Designing REST APIs and integration layers across infrastructure platforms • Developing CMDB ...

Senior Ruby on Rails Developer

Hiring Organisation
Run-Time Group Ltd
Location
Reading, Berkshire, South East, United Kingdom
Employment Type
Permanent
fast-moving, product-centric environments. Key requirements: Ruby & Ruby on Rails Full-Stack Engineering: JavaScript, TypeScript, React, Hotwire, Stimulus Node.js & React exposure beneficial API Design: REST, GraphQL, external integrations Data Stores: PostgreSQL, MySQL, Redis, Elasticsearch Async Processing: Sidekiq, Resque Cloud & DevOps: AWS, Heroku, Docker, CI/CD pipelines … Testing & Quality: RSpec, Capybara, TDD methodologies Security, performance tuning, and system hardening AI & LLMs: API integration, prompt engineering, AI-enhanced features and developer tooling Responsibilities: Owns end-to-end system architecture, ensuring solutions are scalable, maintainable, and delivered at pace. Partners closely with Product, Design, and Commercial teams ...

Senior Software Engineer - Cloud, APIs & Microservices

Location
Crawley, England, United Kingdom
role focuses on building cloud and on-premises services, containerised, service-oriented and event-driven systems within a high-performing scrum team. You will design REST and gRPC APIs, implement microservices, improve CI/CD with Docker, Kubernetes and Azure DevOps, and mentor junior engineers while advancing APIdesign, data solutions and frontend integration using #J-18808-Ljbffr ...

Software Engineer III - Data Engineering- Corporate Know Your Customer

Location
Milton Keynes, England, United Kingdom
software development and data engineering Support a culture of innovation, inclusion, and continuous improvement Required qualifications, capabilities, and skills Hands-on experience delivering system design, application development, testing, and operational stability at enterprise scale Expertise in Python and/or PySpark Knowledge of software application development and technical processes … with depth in disciplines such as cloud, AI/ML, or data engineering Experience in large-scale data processing, microservices, API design, Kafka, Redis, MemCached, observability tools (Dynatrace, Splunk, Grafana), and orchestration frameworks (Airflow, Temporal) Advanced working knowledge of relational and NoSQL databases, vector stores, data lake architectures ...

Experienced .NET Engineer

Location
Maidstone, England, United Kingdom
change where relevant. Offer technical assistance and support across the company. Liaise with third‐party software providers throughout the lifecycle of projects, from design and development to support and maintenance. Required Skills & Experience Proven leadership skills with the ability to support, guide, and delegate effectively. Strong communication and interpersonal … ability to adapt and fix legacy code. Experience planning, coordinating, and delivering testable software in scaled Agile environments. Solid knowledge of software structures, architectures, design patterns, and modern development processes. Minimum 5 years’ experience in C# development. Hands‐on expertise in the following: .NET Core 3.1 ASP.NET MVC (Core ...

Senior Developer

Location
Stansted Mountfitchet, England, United Kingdom
senior hands‐on developer within the ROAM Technical Services team, delivering robust C#/.NET solutions. Own complex development tasks from analysis and design through implementation, testing, deployment and support. Provide technical guidance, code review and mentoring for junior and intermediate developers. Improve software quality through maintainable architecture, automated … development. Qualifications/Requirements: 5+ years’ professional software development experience, with strong commercial experience in C# and .NET/.NET Core. Proven ability to design, build, test and maintain production‐grade services, APIs and integrations. Strong understanding of REST API design, service‐oriented architecture, data modelling ...

Senior Software Engineer

Location
Reading, England, United Kingdom
Ideally with 2+ years with Go but open to similar programming experience) Solid grounding in Kubernetes, Docker, and CI/CD Comfortable with REST API design, SQL, and microservices architecture Experience with test automation, unit and end-to-end testing Cloud experience (any major provider), Git, and Agile ...