20 of 20 OpenAPI Jobs in the UK

Fullstack Developer

Hiring Organisation
Damia Group Ltd
Location
Newcastle Upon Tyne, Tyne and Wear, North East, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £500 per day
principles and Test-Driven Development (TDD) . Experience working with both relational databases (e.g., Postgres) and NoSQL Understanding of REST API design patterns and OpenAPI specifications . Hands-on experience with the AWS Cloud Platform . Knowledge of GitHub and CI/CD pipelines using GitHub Actions . Experience ...

Senior Frontend Developer

Hiring Organisation
Montash
Location
United Kingdom
pipelines such as Jenkins Experience working with test-driven development and modern testing frameworks Desirable Skills: API specification standards such as Swagger/OpenAPI Gradle build tooling Database migration tooling such as Liquibase Event streaming technologies such as Kafka Java or Spring Boot experience ...

Java Software Engineer

Hiring Organisation
Montash
Location
United Kingdom
/CD pipelines (Jenkins or similar) Experience working with microservice architecture in an agile environment Desirable Skills: API specification tools such as Swagger/OpenAPI Gradle build tooling Database migration tooling such as Liquibase Experience with Kafka Frontend exposure with React or Typescript ...

Backend Software Engineer

Hiring Organisation
Hays
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500.0 - £550.0 per day + up to £550pd (inside IR35)
pipeline tooling Flexibility working in agile teams and collaborating closely with engineers, product, and design colleagues Nice to have: API Specification using Swagger/OpenAPI Gradle build systems Liquibase (or similar) for database versioning/migrations Kafka or similar event-streaming platforms React and Typescript If you're interested ...

Front End Developer - Active SC

Hiring Organisation
Hays
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500.0 - £550.0 per day + Up to £550 per day - Inside IR35
Liquibase exposure beneficial). Experienced with CI/CD pipelines and modern DevOps practices (e.g., Jenkins or similar tooling). Familiarity with Swagger/OpenAPI, Gradle, Liquibase, Kafka, Java (Spring Boot). Comfortable working in Agile environments and collaborating across multidisciplinary teams. Excellent communication skills. Nice to have: Active ...

Software Engineer

Hiring Organisation
Raytheon
Location
Gloucester, Gloucestershire, South West, United Kingdom
Employment Type
Permanent, Work From Home
within your team Required Skills and Experience Full-stack experience across a selection of JavaScript frameworks (React, NextJS), TypeScript, Python, Java REST API development & OpenAPI/Swagger Cloud services (AWS or Azure) Containerisation & Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Relational Databases (e.g. PostgreSQL) Elasticsearch/Opensearch ...

Java Software Engineer

Hiring Organisation
Sanderson
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
containerisation CI/CD pipelines (Jenkins or similar) Working in agile, multi-disciplinary teams Desirable experience Kafka Liquibase or similar migration tooling Swagger/OpenAPI Gradle React TypeScript Reasonable Adjustments: Respect and equality are core values to us. We are proud of the diverse and inclusive community we have ...

Principal Software Engineer

Hiring Organisation
Raytheon
Location
Manchester, North West, United Kingdom
Employment Type
Permanent, Work From Home
within your team Required Skills and Experience Full-stack experience across a selection of JavaScript frameworks (React, NextJS), TypeScript, Python, Java REST API development & OpenAPI/Swagger Cloud services (AWS or Azure) Containerisation & Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Relational Databases (e.g. PostgreSQL) Elasticsearch/Opensearch ...

Software Developer - SC Eligible

Hiring Organisation
Eurobase People
Location
Leeds, Yorkshire, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
following would be very beneficial: Experience working in Agile teams/managing releases/DevOps/governance GDS NextJS/SSR AWS Amplify OpenAPI Specification authoring RESTful API design with JSON:API Any experience with Apigee Experience working fullstack Github and/or Gitlab actions/runners experience ...

Python Developer

Hiring Organisation
Stackstudio Digital Ltd
Location
Wokingham, Berkshire, South East, United Kingdom
Employment Type
Contract
Contract Rate
From £300 to £340 per day
type hints, OOP, and data structure design. Build scalable algorithms and write clean, maintainable, and well-structured code. Develop and maintain RESTful APIs using OpenAPI/Swagger, Connexion, or FastAPI. Work with Python web frameworks such as Flask, Django, FastAPI, and Jinja2. Data, Analytics & Databases Perform data manipulation ...

Software Engineer (Serverless AWS, TypeScript, React)

Hiring Organisation
Xpertise
Location
Leeds, Yorkshire, United Kingdom
Employment Type
Contract
Contract Rate
GBP 300 - 400 Daily
automated testing Desirable Skills Agile, DevOps, release management NHS systems: PDS, MESH, NHS APIM NHS Frontend Library/GDS Next.js/SSR AWS Amplify OpenAPI, REST (JSON:API) Apigee Event-driven architectures (EventBridge, Kafka, Kinesis) CI/CD, GitHub/GitLab Actions Authentication/Authorisation Python Full-stack experience ...

Release Manager - Active SC, AWS

Hiring Organisation
Hays
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £500 per day - Inside IR35
criteria ahead of releases. Drive continual improvement in release processes, collaborating with agile delivery teams and leveraging knowledge of tools like Swagger/OpenAPI, Gradle, Liquibase, Kafka, React and Typescript. Nice to have: Immediate availability Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment ...

Card Solutions Architects - Contract role - Sheffield - Immediate

Hiring Organisation
StrategicsIQ Ltd
Location
Sheffield, South Yorkshire, Yorkshire, United Kingdom
Employment Type
Contract
engagement across business, engineering, and infrastructure teams Technical Skills Architecture & Design: Microservices, event-driven architecture, domain-driven design (DDD), layered architecture Integration: RESTful APIs, OpenAPI specs, messaging systems (Kafka, MQ), asynchronous processing Cloud & Infrastructure: Cloud-native design, containerisation (Docker, Kubernetes), CI/CD pipelines Data: Distributed data systems, RDBMS ...

C# Senior Software Developer

Hiring Organisation
Adria Solutions
Location
Manchester, North West, United Kingdom
Employment Type
Permanent
Salary
£75,000
Framework Core (DbContext, LINQ, Migrations) Debug and trace request flows from UI Controller API Database Response Maintain and publish API documentation via Swagger/OpenAPI Ensure API security, reliability, and performance (error handling, retry logic, logging, timeouts, CORS) Collaborate with database, infrastructure, and QA teams for portal ...

Lead Software Developer

Hiring Organisation
Oscar Associates (UK) Limited
Location
Warrington, Cheshire, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
Figma prototypes Maintaining high-quality technical documentation Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core Entity Framework Core RESTful API design/OpenAPI/Swagger Angular 21 (mandatory) TypeScript/RxJS DevExpress DevExtreme v25 (mandatory) Microsoft Azure (App Services, SQL, Storage) Azure Entra ID Azure Key Vault ...

Software Engineer

Hiring Organisation
Diamond Light Source
Location
Didcot, Oxfordshire, South East, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£50,000
Design tools (Figma, Sketch) Exposure to JavaScript testing frameworks e.g. Jest, Vitest, Cypress, Jasmine, etc. Knowledge of CI/CD techniques Experience with GraphQL, OpenAPi spec, JSON Schema & SQL/No SQL databases. Familiarity with MonoRepo project structures (TurboRepo) Development of APIs with Python Frameworks e.g. FastAPI Benefits Diamond ...

Senior Full Stack Engineer

Hiring Organisation
MarkIT Placements
Location
Didcot, Oxfordshire, South East, United Kingdom
Employment Type
Contract
Contract Rate
From £500 to £700 per day
focus) Design and evolve scalable backend services in Python using FastAPI for high-availability, high-throughput workloads. Build well-versioned RESTful APIs aligned to OpenAPI/Swagger, with strong conventions for consistency, idempotency, and backward compatibility. Implement authentication and authorization using OAuth2/OIDC, session management, and fine-grained … engineering, with a strong focus on backend development in Python and with event-driven architectures. Proven experience designing and operating production REST APIs with OpenAPI/Swagger. Comfortable working in a React/TypeScript codebase. Deep understanding of relational database design, indexing, performance tuning, and migrations (PostgreSQL). Proficiency ...

Data Analyst

Hiring Organisation
Tate Recruitment
Location
City of London, London, United Kingdom
REST, JSON . Experience with Azure and Microsoft data tools. Good SQL skills; some Python or R is a bonus. Familiarity with Swagger/OpenAPI or Postman . Understanding of data modelling, ETL concepts and system‐to‐system integrations. Comfortable working with both technical teams and business stakeholders. Clear ...

Integrations Lead

Hiring Organisation
Needl
Location
United Kingdom
manage multiple projects simultaneously and drive deliverables to completion Experience with basic SQL querying and JSON payload analysis Experience with APIs specs like OpenAPI, web development, and writing scripts to build internal tools (e.g., bash scripting, Python, SQL, Ruby, Golang, Postman ...

Technical Writer

Hiring Organisation
Prism Digital
Location
United Kingdom
APIs and API architecture Hands-on experience documenting endpoints, request/response schemas, authentication mechanisms, and error handling Ability to interpret code, Swagger/OpenAPI specs, or developer conversations without heavy hand-holding Experience structuring large documentation sets logically and independently Confidence operating autonomously in a fast-moving product … environment What You’ll Work With REST APIs and internal service architecture Endpoints, request/response models, authentication flows, and error handling frameworks OpenAPI/Swagger specifications Internal engineering teams across backend and platform Documentation repositories and knowledge management tools Release notes and developer-facing technical content Nice ...