26 to 50 of 94 API Design Jobs in the UK

Java / Cloud Technical Lead - London, Wembley

Hiring Organisation
Adecco
Location
London, United Kingdom
Employment Type
Permanent
Salary
£75000 - £80000/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 ...

Lead Java Modernization Engineer - London, Wembley

Hiring Organisation
Adecco
Location
London, United Kingdom
Employment Type
Permanent
Salary
£75000 - £80000/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 ...

Technical Architect - must be SC cleared

Hiring Organisation
Initialize IT
Location
United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
complex digital or enterprise environments. Strong software engineering foundation, with practical knowledge of modern application architectures (eg, microservices, APIs, frameworks). Proven ability to design and document architectures using visual modelling techniques such as C4, UML, and data flow diagrams. Hands-on experience with at least one major cloud … provider, ideally AWS, including Infrastructure as Code, platform services, networking, and security controls. Deep understanding of secure and resilient system design, including authentication patterns, threat modelling, performance considerations, and observability. Familiarity with modern development practices such as CI/CD, TDD, and containerisation. Strong understanding of data modelling, integration ...

Senior Python Engineer (Django / DevOps / IaC)

Hiring Organisation
Pontoon
Location
Welwyn Garden City, Hertfordshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£850 per day
cloud-native systems across the business by making security tooling fast, reliable, and seamless for every development team. You will be responsible for Design, develop, and maintain scalable REST APIs using Django. Build and operate asynchronous task pipelines (Celery/Redis) that orchestrate security scanning at scale. Ensure best … practices for code quality, performance, and security. Integrate robust security practices into all API layers, including authentication, authorisation, data validation, and protection against vulnerabilities. Develop and manage CI/CD pipelines for automated testing, deployment, and monitoring. Work closely with core devops teams or independently handle infrastructure and deployment ...

Senior Python Engineer (Django / DevOps / IaC)

Hiring Organisation
Pontoon
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£850 per day
cloud-native systems across the business by making security tooling fast, reliable, and seamless for every development team. You will be responsible for Design, develop, and maintain scalable REST APIs using Django. Build and operate asynchronous task pipelines (Celery/Redis) that orchestrate security scanning at scale. Ensure best … practices for code quality, performance, and security. Integrate robust security practices into all API layers, including authentication, authorisation, data validation, and protection against vulnerabilities. Develop and manage CI/CD pipelines for automated testing, deployment, and monitoring. Work closely with core devops teams or independently handle infrastructure and deployment ...

Principal Artificial Intelligence (AI) Platform Engineer/Architect

Hiring Organisation
WTW
Location
Greater London, United Kingdom
Employment Type
Full Time
their development workflows safely and seamlessly. Acting as both architect and hands-on builder, you will articulate our vision for AI-accelerated development practices, design platforms that embed AI at every phase of the SDLC, and champion adoption across our organization. We are seeking a highly skilled engineer … model) The Role Define and evolve the vision for AI-enabled SDLC practices, translating business and technical strategy into concrete platform capabilities and processes Design and implement scalable AI platform infrastructure (SDKs, frameworks, deployment pipelines) that enables rapid, safe integration of AI into all phases of development—from coding ...

Integration Developer FTC

Hiring Organisation
itecopeople
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£60,000
using modern cloud-native and streaming technologies. Key Responsibilities Develop event-driven integrations and backend services Build connectors, event-processing services, and data pipelines Design scalable integration patterns, schemas, and event flows Develop CDC pipelines and resilient messaging solutions Improve observability through logging, metrics, and tracing Deploy containerised services … Grafana Required Skills Strong software engineering background Experience building integration or event-driven platforms Kafka, Redpanda, or similar streaming technologies Enterprise system integrations and API design Agile development experience Strong communication and collaboration skills Desirable Skills Go and/or Python CDC pipeline development Azure cloud experience Observability ...

AI Platform/ DevOps Engineer

Hiring Organisation
The Portfolio Group
Location
City of London, London, Castle Baynard, United Kingdom
Employment Type
Permanent
Salary
£70000 - £80000/annum + Benefits
secure, and cost-efficient platform infrastructure that enables AI engineering teams to ship and operate AI products reliably in production. What you'll do Design, build, and operate cloud-native AI platform infrastructure across AWS (Lambda, API Gateway, DynamoDB, S3, CloudWatch) and Databricks Deploy and operate containerised services … workflows, and RAG components Implement observability across AI workloads using CloudWatch, MLflow, and OpenTelemetry - covering latency, throughput, cost, and system health Apply secure-by-design principles including IAM, encryption, network controls, and audit logging Work closely with AI engineers to translate prototypes and proof-of-concepts into production-ready ...

Development Manager

Hiring Organisation
Eclipse IT Recruitment
Location
Bradford, West Yorkshire, United Kingdom
Employment Type
Permanent
Salary
£50000 - £60000/annum Plus bens
transition of legacy systems into more flexible, web-based platforms using APIs and industry-standard practices. Technical & Architectural Skills Software architecture and system design Application modernization (legacy-to-web/platform transformation) API design and integration (REST, GraphQL, etc.) Database design and performance optimization Cloud platforms … manage the software development team (including contractors) in collaboration with the current Development Manager, fostering a collaborative and high-performing environment. Architect and design modern, scalable applications and integrations, with a focus on transitioning from legacy platforms to modern solutions. Collaborate with stakeholders and change management teams to gather ...

Cloud Engineer

Hiring Organisation
BAE Systems
Location
City and Borough of Leeds, United Kingdom
Employment Type
Full Time
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/ ...

Technical Product Manager

Hiring Organisation
WTW
Location
Surrey, United Kingdom
Employment Type
Full Time
vision. Highly Desirable: • Background in Software development, data science, or data engineering. • Exposure to cloud platforms (e.g., AWS, Azure, GCP). • Understanding of API design, microservices architecture, or event-driven systems. • Experience in B2B enterprise software environments with complex stakeholder landscapes. • Product management certification (e.g., CSPO, Pragmatic Institute ...

Senior Software Engineer Java

Hiring Organisation
Get2Talent
Location
Manchester, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
scalable cloud-native platforms, modern web applications, APIs, and digital services that support meaningful and high-impact programmes. What Youll Be Doing Leading the design, development, and delivery of secure full-stack applications using Java, React, and modern web technologies Building scalable back-end services, APIs, and distributed systems … Java and modern front-end frameworks such as React Previous experience operating at Senior, Lead, or Principal Engineer level Strong understanding of software architecture, API design, and scalable distributed systems Experience building cloud-native applications and working within AWS, Azure, or similar cloud environments Strong knowledge of DevOps ...

Java Full Stack Developer

Hiring Organisation
Get2Talent
Location
Cheltenham, Gloucestershire, South West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
scalable cloud-native platforms, modern web applications, APIs, and digital services that support meaningful and high-impact programmes. What Youll Be Doing Leading the design, development, and delivery of secure full-stack applications using Java, React, and modern web technologies Building scalable back-end services, APIs, and distributed systems … Java and modern front-end frameworks such as React Previous experience operating at Senior, Lead, or Principal Engineer level Strong understanding of software architecture, API design, and scalable distributed systems Experience building cloud-native applications and working within AWS, Azure, or similar cloud environments Strong knowledge of DevOps ...

Full Stack Developer Java

Hiring Organisation
Get2Talent
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
scalable cloud-native platforms, modern web applications, APIs, and digital services that support meaningful and high-impact programmes. What Youll Be Doing Leading the design, development, and delivery of secure full-stack applications using Java, React, and modern web technologies Building scalable back-end services, APIs, and distributed systems … Java and modern front-end frameworks such as React Previous experience operating at Senior, Lead, or Principal Engineer level Strong understanding of software architecture, API design, and scalable distributed systems Experience building cloud-native applications and working within AWS, Azure, or similar cloud environments Strong knowledge of DevOps ...

Java Full Stack Developer

Hiring Organisation
Get2Talent
Location
Cardiff, South Glamorgan, Wales, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
scalable cloud-native platforms, modern web applications, APIs, and digital services that support meaningful and high-impact programmes. What Youll Be Doing Leading the design, development, and delivery of secure full-stack applications using Java, React, and modern web technologies Building scalable back-end services, APIs, and distributed systems … Java and modern front-end frameworks such as React Previous experience operating at Senior, Lead, or Principal Engineer level Strong understanding of software architecture, API design, and scalable distributed systems Experience building cloud-native applications and working within AWS, Azure, or similar cloud environments Strong knowledge of DevOps ...

Senior Solutions Engineer

Hiring Organisation
Wise
Location
Greater London, United Kingdom
Employment Type
Full Time
Salary
87500 to 111000 GBP Annually
team works with top tier global financial institutions and major tech companies to offer Wise products and services directly to their customers. Through our API, we help partners to architect and build integrations to our world class-leading international finance products, which in turn improves Wise Platform by increasing … improve turnaround times. Designing and developing innovative new features that expand the functionality of Wise's services and exposing these features through the public API, enabling seamless integration with partner systems and empowering them to leverage the full potential of Wise's platform. Diagnosing and resolving complex technical issues ...

Software Engineer - Transfers (Client Journeys)

Hiring Organisation
Hargreaves Lansdown
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Permanent
requirements Participate in code reviews and contribute to team engineering standards Required Skills & Experience Backend/BFF Node.js with TypeScript AWS Lambda handler development API Gateway - routing, authorizers, request/response handling Middleware patterns for Lambda handlers (e.g. Middy) Working with DynamoDB, Secrets Manager, and SSM Parameter Store RESTful … API design AWS & Infrastructure AWS CDK or SST for infrastructure as code Familiarity with core AWS services: Lambda, API Gateway, DynamoDB, IAM, VPC, SNS Basic understanding of VPC networking - Lambda in VPC, security groups Comfortable reading and modifying existing IaC stacks Testing Unit and integration testing with ...

Solution Architect Martech

Hiring Organisation
Robert Walters
Location
Manchester, Lancashire, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
Computer Applications (B.E./B.Tech or BCA) from a recognised institution; MBA preferred. Strong expertise in enterprise architecture, system integration and scalable solution design across cloud platforms (AWS, Azure, GCP), microservices, API design and DevOps practices. Hands on experience with conversational AI (Kore.AI and similar platforms), intelligent ...

Senior Full Stack Developer

Hiring Organisation
BAE Systems
Location
Gloucestershire, United Kingdom
Employment Type
Full Time
support their core mission capabilities. You’ll work as part of agile teams with regular contact with end-users to flexibly and efficiently understand, design, develop, deploy and maintain secure applications and services. You’ll be encouraged to identify new ways of solving problems and have the potential … work in a range of different teams across our customer organisations. Key Responsibilities Design and implement robust, scalable, and secure back-end services using Node.js Build dynamic, responsive, and user-friendly front-end interfaces using React.js Develop and integrate APIs (GraphQL etc.) Collaborate with product managers, and other engineers ...

Senior Applied AI Engineer (.NET)

Hiring Organisation
Adria Solutions
Location
Warrington, Cheshire, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£75,000
Senior Applied AI Engineer (.NET) Were looking for a Senior Applied AI Engineer to design and deliver production-grade AI-powered features within a modern .NET product environment. This is a hands-on engineering role focused on applying AI in real systems not training models. Youll work with commercial … role suits someone who has already successfully integrated AI into production products and can bring proven patterns into a growing team. What Youll Do Design and build AI-powered product features within a C#/.NET ecosystem Integrate commercial AI APIs into production systems with a focus on reliability ...

Senior Software Developer

Hiring Organisation
Oscar Associates (UK) Limited
Location
Warrington, Cheshire, North West, United Kingdom
Employment Type
Permanent
Salary
£70,000
working with an exciting organisation that is looking to appoint a Senior Full Stack Developer to help design and deliver secure, cloud-native applications within a modern Microsoft and Azure ecosystem. This is an excellent opportunity for an experienced full-stack engineer who thrives in structured architectural environments … maintaining unit and frontend tests (NUnit and ViTest) Contributing to CI/CD pipeline improvements and secure deployment practices Participating in architecture and technical design reviews Ensuring all development aligns with OWASP security best practices Tech Stack & Environment Core technologies: .NET 10/ASP.NET Core Angular 21 (mandatory) DevExpress ...

Full Stack Developer

Hiring Organisation
Robert Half
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
this is an opportunity to help shape the future of a rapidly evolving platform. Role The Full Stack Developer will contribute to full-stack design and development across the platform. Design, develop, and maintain both front-end user interfaces and back-end services, APIs, and databases. Monitor platform … strong focus on backend development. Bachelor's or Master's degree in Computer Science, Engineering, or a related discipline. Strong understanding of database design, data modelling, and optimisation, particularly using SQL. Hands-on experience working with Google Cloud Platform (GCP) services. Experience monitoring production systems, triaging issues, and distinguishing ...

Lead Developer

Hiring Organisation
Oscar Associates (UK) Limited
Location
Warrington, Cheshire, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£80,000
manual test strategies Documenting architectural decisions (ADRs) and maintaining clear technical communication Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (offline-first mobile design) Microsoft Azure (App Services, Azure SQL, Blob Storage, Key Vault, Application Insights … They're Looking For 7+ years' commercial software development experience At least 2 years in a leadership position Strong expertise in modern .NET and API design Proven Angular experience (v15+) Hands-on Azure architecture and deployment experience Strong understanding of CI/CD and enterprise DevOps practices Experience ...

Senior Ruby Engineer - £110K

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: Provides hands-on technical leadership to engineering teams (515 people), including mentoring, code review, and architectural direction. Owns end-to-end system architecture, ensuring ...

Manager - Lead AI Engineer

Hiring Organisation
Anson Mccade
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
building and knowledge-sharing initiatives Skills & Experience Required Significant senior backend development experience with strong Python proficiency (async programming, concurrency, multithreading) Expertise in RESTful API design, OpenAPI/Swagger documentation and API lifecycle best practices Hands-on experience with ML libraries: PyTorch, PySpark, scikit-learn, Hugging Face … machine learning, cloud computing or data engineering highly advantageous Professional accounting qualification desirable but not required Nice to Have Experience with Microsoft Graph API Background in audit, financial services or regulated industry technology What's on Offer A competitive salary and benefits package, flexible hybrid working across 20+ ...