1 to 25 of 28 OpenAPI Jobs

Java Full stack Developer

Hiring Organisation
KBC Technologies UK LTD
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
Spring Boot Hands-on experience with Kafka and asynchronous messaging Experience with API Gateway solutions (Apigee preferred) Strong knowledge of REST APIs, JSON, OpenAPI/Swagger Experience with SQL/NoSQL databases (Oracle, PostgreSQL, MongoDB) Frontend experience with Angular or React Understanding of payment systems and financial services architecture ...

Python Developer - 6 months - Wokingham - Contract

Hiring Organisation
Hamilton Barnes
Location
Wokingham, Berkshire, United Kingdom
Employment Type
Contract
Contract Rate
GBP 340 - 375 Daily
scalable algorithms and write clean, maintainable, and well-structured Python code. Design and develop RESTful APIs using frameworks such as FastAPI, Flask, Django, and OpenAPI/Swagger. Perform data manipulation and analysis using Pandas and NumPy. Design, query, and maintain relational (eg PostgreSQL) and NoSQL databases (eg MongoDB). ...

Python Developer

Hiring Organisation
Stackstudio Digital Ltd
Location
United Kingdom
Employment Type
Permanent
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 ...

AI Automation Engineer

Hiring Organisation
McCabe & Barton
Location
Central London, London, United Kingdom
Employment Type
Permanent
Django REST Framework for exposing AI models and automation services. Experience with API authentication (OAuth, JWT), rate limiting, error handling, API documentation (Swagger/OpenAPI), webhooks, and integrating disparate systems to create seamless automated workflows. Document Processing & OCR - Experience implementing intelligent document processing solutions using OCR technologies (Tesseract, Azure ...

Lead Java Developer

Hiring Organisation
TXP Technology x People
Location
Telford, Shropshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£0 per annum
Required Skills Java , Spring Boot , JUnit , Kubernetes Experience working on Central Government projects Desirable Skills JPA, Maven, Mockito, AWS, GitLab CI/CD, Helm, OpenAPI, SQL, Kibana, Shell scripting ...

Senior Software Developer C# / Azure

Hiring Organisation
Greenfield I T Recruitment
Location
Liverpool, Merseyside, England, United Kingdom
Employment Type
Full-Time
Salary
£60,000 - £70,000 per annum
modern frontend integration Strong database design and optimisation skills (T-SQL and analytical data stores) Experience with API security and documentation (e.g. OAuth, OpenAPI/Swagger) Comfortable working in Agile teams and collaborative engineering environments Desirable Experience Terraform, Docker, and exposure to containerised environments Event-driven architectures, messaging ...

Senior Full Stack Engineer (Golang/Typescript/Kubernetes)

Hiring Organisation
Safe Intelligence
Location
City of London, London, United Kingdom
knowledge of DevOps and Git best practices. Experience automating version control, testing, and releases, preferably with GitHub Actions. Nice-to-have: Familiarity with the OpenAPI specification and code generation toolsets for API development. Some experience with Python, modern development techniques, and design patterns. Experience in data science tools ...

Java Developer

Hiring Organisation
TXP Technology x People
Location
Telford, Shropshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£0 per annum
quality solutions Required Skills Java , Spring Boot , JUnit , Kubernetes Experience working on Central Government projects Desirable Skills JPA, Kibana, Maven, Mockito, AWS, GitLab, Helm, OpenAPI, SQL, Shell scripting Why Apply? Long-term contract (12 months) Flexible working arrangements Opportunity to work on high-impact government modernisation projects ...

Senior Technical Lead

Hiring Organisation
Brightwork Ltd
Location
Glasgow, Lanarkshire, Scotland, United Kingdom
Employment Type
Permanent
Azure App Service, Container Services, and CI/CD pipelines Solid understanding of REST APIs, JSON, and microservice architecture Familiarity with Docker, Swagger/OpenAPI, and modern development practices Excellent communication and stakeholder management skills You'll join an environment that values autonomy, innovation and technical excellence, with ...

Full Stack Engineer

Hiring Organisation
algo1
Location
City of London, London, United Kingdom
Contribute to distributed, event-driven backend services connecting our web experience with information from remote devices and external data sources. Build and document APIs (OpenAPI/AsyncAPI) for mobile and web clients Model and manage structured and semi-structured data across storage layers Integrate AI-driven personalisation and real ...

Software Engineer

Hiring Organisation
MRJ Recruitment
Location
Northern Ireland, United Kingdom
secure authentication using OAuth, JWT and modern security patterns Exposing product capabilities for AI services and third-party integrations Producing clear API documentation using OpenAPI/Swagger Improving reliability with logging, monitoring and strong error handling Supporting CI/CD pipelines for automated testing and deployment Working closely with ...

Open Banking Solution Architect

Hiring Organisation
Stackstudio Digital Ltd
Location
Milton Keynes, Buckinghamshire, South East, United Kingdom
Employment Type
Contract
Contract Rate
From £550 to £600 per day
Deep understanding of OAuth 2.0, OpenID Connect, mutual TLS, certificates, token management, and consent-driven access control. Experience interpreting and applying standards such as OpenAPI, FAPI, and relevant regulatory technical standards. Architecture, Strategy, and Solution Design Significant experience operating as a Solution Architect in complex financial services environments. Proven ...

Mulesoft Architect

Hiring Organisation
167 Solutions Ltd
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
MuleSoft Anypoint Platform (Studio, API Manager, Runtime Manager) Solid understanding of API-led connectivity and enterprise integration patterns Experience with REST, SOAP, RAML/OpenAPI, JSON, XML Strong DataWeave development and transformation experience Familiarity with CI/CD pipelines and cloud deployment models Ability to manage both design-level ...

SC cleared .NET Engineer

Hiring Organisation
IO Associates
Location
United Kingdom
Employment Type
Contract
Contract Rate
£500 - £600 per day + Inside IR35
/JSON APIs Unit testing with MSTest Experience in requirements gathering and technical analysis Highly Desirable Docker Oracle SQL Postman and Swagger/OpenAPI PowerShell ...

Lead Solution Architect

Hiring Organisation
Anson Mccade
Location
Glasgow, Lanarkshire, Scotland, United Kingdom
Employment Type
Permanent, Work From Home
strategies across on-prem and cloud to optimise performance, resilience, cost, and security. API & Integration Architecture Lead the design of secure, scalable RESTful APIs (OpenAPI/Swagger). Define standards for API gateways, authentication (OAuth2, mTLS), traffic management, rate limiting, and observability. Design integration patterns connecting internal systems with ...

Technical Architect

Hiring Organisation
RCRTR
Location
Swansea, City and County of Swansea, West Glamorgan, United Kingdom
Employment Type
Contract
Contract Rate
£470 - £500/day
synchronous/asynchronous). Lead the design of distributed microservices, ensuring scalability, resilience, observability, and maintainability. Apply schema-driven design principles (e.g., JSON Schema, OpenAPI, AsyncAPI) to ensure consistent and reusable domain models. Cloud & Platform Engineering (AWS) Select and integrate AWS services (EC2, Lambda, API Gateway, S3, DynamoDB … experience with APIs (REST, event-driven, messaging), microservices, and distributed system design. Strong understanding of schema-driven design , using tools such as JSON Schema, OpenAPI, or AsyncAPI. Solid understanding of cloud security, identity and access management, and operational best practices. Experience working with Infrastructure-as-Code (Terraform, CloudFormation). ...

Fixed Incomes Data Engineer

Hiring Organisation
Bright Purple Resourcing
Location
Edinburgh, Midlothian, Scotland, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£80,000
Applying your industry know-how within financial data to ensure continual product development Tech youll work with: Functional programming i.e. Ruby, Python, Elixir PostgreSQL OpenAPI integrations Various data streaming and processing tools Whats in it for you: Fully remote working Flexible hours Trust and ownership Chance to build ...

Senior Azure API Engineer

Hiring Organisation
Vermillion Analytics
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £750/day
operationalise a lean, zero-trust API platform on Azure API Management Architect microservices and event-driven integration flows at scale Define API specifications using OpenAPI and implement modern integration patterns Drive CI/CD automation, monitoring, and operational excellence Mentor developers and champion best practices across the engineering team … that delight users What You Bring Essential: 10+ years software development, including 3+ years hands-on Azure Deep expertise in Azure API Management Strong OpenAPI, RESTful API design, and security protocols (OAuth 2.0, JWT, TLS) Proficiency in Node.js/Java/C# and modern integration patterns Experience with ...

Senior Azure API Engineer

Hiring Organisation
Vermillion Analytics
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£550 - £750 per day
operationalise a lean, zero-trust API platform on Azure API Management Architect microservices and event-driven integration flows at scale Define API specifications using OpenAPI and implement modern integration patterns Drive CI/CD automation, monitoring, and operational excellence Mentor developers and champion best practices across the engineering team … that delight users What You Bring Essential: 10+ years software development, including 3+ years hands-on Azure Deep expertise in Azure API Management Strong OpenAPI, RESTful API design, and security protocols (OAuth 2.0, JWT, TLS) Proficiency in Node.js/Java/C# and modern integration patterns Experience with ...

React Native developer

Hiring Organisation
Experis
Location
Knutsford, Cheshire, United Kingdom
Employment Type
Contract
Contract Rate
£430/day
performance, reliability, and maintainability Build and support Java-based backend services for enterprise-scale applications Design and implement RESTful APIs , including documentation using OpenAPI Specification (OAS)/YAML Apply Test-Driven Development (TDD) principles across frontend and backend components Write and maintain unit tests to ensure high levels … development Hands-on experience with TDD and automated testing practices Solid experience with GitLab , including CI/CD pipelines Experience producing and maintaining OpenAPI (OAS)/YAML specifications Strong understanding of unit testing frameworks and best practices Proven experience working in Agile/Scrum delivery environments ...

Java Developer

Hiring Organisation
Experis
Location
Knutsford, Cheshire, United Kingdom
Employment Type
Permanent
Salary
£44000 - £45000/annum
maintain RESTful APIs using Java Apply TDD and BDD practices to ensure high-quality, well-tested code Produce and maintain API specifications using OpenAPI (OAS)/YAML Collaborate with cross-functional Agile teams including QA, DevOps, and Product Contribute to CI/CD pipelines using GitLab Ensure code quality … with TDD (and ideally BDD ) - please highlight this clearly on your CV if applicable Proven experience designing and building RESTful APIs Experience working with OpenAPI Specification (OAS)/YAML Solid version control experience using GitLab Hands-on exposure to CI/CD pipelines Nice-to-Have/Desirable Skills ...

Staff Full Stack Engineer

Hiring Organisation
Addition
Location
Milton Keynes, England, United Kingdom
Technology is at the heart of this fast-growing digital bank — powering the systems that make business banking simpler, faster and smarter. This role is about setting the technical direction across payments, shaping scalable systems ...

QA Test Engineer

Hiring Organisation
Experis
Location
Northampton, Northamptonshire, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £401/day
decisioning components, and integration workflows. Conduct JSON schema validation, payload structure checks, and API contract verification. Review and validate API documentation using Swagger/OpenAPI specifications. Develop Python scripts for simulation, automation, and data validation. Prepare and maintain test plans, test cases, and use cases. Validate decision strategy outputs … Agile ceremonies and support performance/monitoring activities where required. Core Skills Testing: Manual, REST API, Automation Technologies: JSON, JSON Schema, Swagger/OpenAPI Tools: Python, Karate, Excel, LoadRunner, Insomnia/Bruno CI/CD: GitLab, Jenkins Monitoring: Kibana, AppDynamics Concepts: SDLC, TDD, OAuth, Authentication/Authorization, Tokenization/ ...

Quality Assurance Engineer

Hiring Organisation
MANNING SERVICES LIMITED
Location
Northampton, England, United Kingdom
decisioning components, and integration workflows. Conduct JSON schema validation , payload structure checks, and API contract verification. Review and validate API documentation using Swagger/OpenAPI specifications. Develop Python scripts for simulation, automation, and data validation. Prepare and maintain test plans, test cases, and use cases. Validate decision strategy outputs … Agile ceremonies and support performance/monitoring activities where required. Core Skills Testing: Manual, REST API, Automation Technologies: JSON, JSON Schema, Swagger/OpenAPI Tools: Python, Karate, Excel, LoadRunner, Insomnia/Bruno CI/CD: GitLab, Jenkins Monitoring: Kibana, AppDynamics Concepts: SDLC, TDD, OAuth, Authentication/Authorization, Tokenization/ ...

Salesforce Engineer

Hiring Organisation
Experis
Location
Knutsford, Cheshire, United Kingdom
Employment Type
Contract
consume RESTful APIs, ensuring robust and secure integrations Apply Test-Driven Development (TDD) and Behaviour-Driven Development (BDD) approaches where applicable Produce and maintain OpenAPI specifications using OAS/YAML Write comprehensive unit tests to ensure code quality and reliability Contribute to automated CI/CD pipelines using GitLab … years' experience with Java Strong, demonstrable experience with TDD (and BDD, where applicable) Proven experience designing and building RESTful APIs Hands-on experience with OpenAPI Specification (OAS)/YAML Solid understanding of unit testing frameworks Experience using GitLab for version control and CI/CD pipelines Strong understanding ...