25 of 25 Contract OpenAPI Jobs

Lead Azure Engineer

Hiring Organisation
Teksystems
Location
Sheffield, South Yorkshire, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £550/day
operational readiness. Design, build, and operate back-end services using Java (Spring Boot) and/or Python (FastAPI/Flask), covering API design with OpenAPI, performance optimisation, and security controls. Develop modern user interfaces with React, focusing on accessible design, reusable components, and efficient state management. Design and maintain ...

Senior Java Developer

Hiring Organisation
TXP
Location
Telford, Shropshire, West Midlands, United Kingdom
Employment Type
Contract
Contract Rate
£0.00 - £550 per day
delivering solutions within complex enterprise environments Desirable Skills Experience with any of the following would be advantageous: JPA Kibana Maven Mockito AWS GitLab Helm OpenAPI SQL Shell Scripting Preferred Background Candidates from the following sectors are particularly welcome: Public Sector/Government Banking Financial Services Insurance Utilities Telecommunications Other ...

Senior Front End React Engineer

Hiring Organisation
Experis
Location
Nationwide, United Kingdom
Employment Type
Contract
Contract Rate
£450 - £470/day
environments. Adaptable and comfortable working across multiple priorities. Desirable Skills Java 17+ Spring Boot 3+ JPA/JDBC Kubernetes Microservices Helm AWS GraalVM Mockito OpenAPI gRPC/Protobuf Kibana & Grafana OAuth2/OpenID Connect WCAG Accessibility Standards Cucumber/Gherkin Selenium Sustainable Software Engineering practices If you receive suspicious ...

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 ...

Quality Engineer

Hiring Organisation
CBSbutler Holdings Limited trading as CBSbutler
Location
Telford, Shropshire, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £430/day
context switch across different priorities. Desirable JUnit Playwright/Selenium Cucumber/Gherkin Gatling OWASP ZAP SonarQube WireMock Kubernetes/Docker Microservices AWS OpenAPI WCAG/Axe/Wave GitHub Copilot Agile Scrum practices If this role is of interest apply now or email your ...

Quality Engineer

Hiring Organisation
Sanderson Government and Defence
Location
Telford, Shropshire, West Midlands, United Kingdom
Employment Type
Contract
communication skills Agile Scrum experience Quality-driven mindset Desirable Skills Playwright, JUnit, Selenium, Cucumber/Gherkin, OWASP ZAP, SonarQube, Kubernetes, Docker, AWS, Microservices, OpenAPI, WCAG and DevSecOps practices. What We're Looking For A proactive Quality Engineer who thrives in Defence environments, enjoys solving complex technical challenges ...

S/4HANA - Coupa Integration Architect

Hiring Organisation
Experis
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £598/day
challenging deadlines; credible, resilient, and comfortable challenging the status quo to drive the best integration outcomes. Technical: API Engineering (REST/OData), specification using OpenAPI/Swagger, Postman-based testing. SAP integration artefacts (IDoc types for vendor, PO, GR, invoice; BAPI/RFC; ALE; OData services). Coupa integration ...

Java Developer

Hiring Organisation
CBSbutler Holdings Limited
Location
Telford, Shropshire, West Midlands, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £425 per day
expected to grow significantly over the coming years. Key Skills Strong Java development experience Spring/Spring Boot Microservices Git SQL & MongoDB Swagger/OpenAPI Software testing and code quality Application monitoring and troubleshooting Shell scripting Kubernetes - desirable, but not essential This is a great opportunity for a Java ...

Java Engineer

Hiring Organisation
Experis
Location
Nationwide, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £620/day
Spring Boot JUnit Experience working within Agile development teams Strong understanding of software engineering best practices Desirable Skills JPA Maven Mockito GitLab AWS Helm OpenAPI SQL Shell Scripting Kibana If you receive suspicious outreach claiming to be from us, please contact us via the ManpowerGroup website. ...

Senior webMethods Integration Developer

Hiring Organisation
CBSbutler Holdings Limited trading as CBSbutler
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£625 - £645/day inside ir35
webMethods webMethods Flow Services 10.15+ webMethods Integration Server 10.15+ webMethods Designer Universal Messaging/JMS webMethods API Gateway 10.15+ REST/SOAP Swagger/OpenAPI AWS S3 connectors/file transfer Data & search SQL - Oracle, MSSQL or MySQL Elastic/OpenSearch Cloud & infrastructure Azure Kubernetes fundamentals - pods, services, ingress ...

API Gateway Engineer - Envoy

Hiring Organisation
Axiom Software Solutions Ltd
Location
Glasgow, Lanarkshire, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
Cloud-native operations: Practical, hands-on cloud-native experience. ENVOY: Professional experience with Envoy Proxy or Envoy Gateway. API design: Strong understanding of the OpenAPI Specification (OAS) for RESTful APIs. Authentication & authorization: Hands-on experience implementing authentication and authorization at the gateway, including OAuth 2.0, OpenID Connect (OIDC ...

Senior Software Engineer (AI, CoPilot Studio)

Hiring Organisation
Pontoon
Location
Dublin, City of Dublin, Republic of Ireland
Employment Type
Contract
Contract Rate
£474/day
delivering enterprise technology solutions. Strong expertise in Python development. Proven experience in designing and building REST APIs and system integrations. Familiarity with Swagger/OpenAPI specifications and API documentation. Solid understanding of JSON, web services, and modern integration patterns. Experience owning technical design for medium to large software delivery ...

Kong API Engineer (urgent start)

Hiring Organisation
Uniting People
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 440 Daily
Golang and/or Lua Hands-on experience with API Management platforms , ideally Kong API Gateway Strong understanding of RESTful APIs and the OpenAPI Specification (OAS) Hands-on API security experience, including: OAuth 2.0 OpenID Connect (OIDC) JWT validation Key Authentication Mutual TLS (mTLS) Strong cloud-native engineering experience ...

Front End Developer

Hiring Organisation
Experis
Location
Telford, Shropshire, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £579/day
component-library development using custom design patterns, encompassing MUI, Storybook and Figma. Runtime validation and contract-first API integration, for example Zod and OpenAPI-generated types. Authentication, authorisation and secure session management using OAuth 2.0/OpenID Connect. CI/CD, dependency management and frontend security practices. Experience working ...

Senior Integration Architect

Hiring Organisation
TXP
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£700/day
Skills & Experience Extensive experience in enterprise integration architecture and delivery within large-scale transformation or migration programmes. Strong expertise in API design, REST services, OpenAPI specifications, and modern integration patterns. Experience designing and implementing service-based and distributed architectures. Working knowledge of enterprise integration platforms such as SAP Integration ...

Software Developer C and Linux

Hiring Organisation
System Recruitment
Location
Lymington, Hampshire, South East, United Kingdom
Employment Type
Contract
Contract Rate
£60,000
level Understanding of secure configuration delivery and deployment auditability of newly provisioned systems API Design & Implementation (maybe): Experience/Familiarity with: Working with OpenAPI (Swagger) specifications to define service interfaces Implementing APIs in C or similarly low-level environments, without reliance on full-stack frameworks Designing for defensive input ...

SAP Integration Analyst

Hiring Organisation
TXP
Location
Telford, Shropshire, West Midlands, United Kingdom
Employment Type
Contract
Contract Rate
£0.00 - £500 per day
analytical approach with strong attention to detail. Desirable Experience API-led and event-driven integration architectures. REST, SOAP, messaging, and file-based integration technologies. OpenAPI specifications and API management platforms. Cloud migration, application modernisation, or data centre exit programmes. Dependency mapping and application portfolio assessment. Jira, Azure DevOps, Confluence ...

Java Engineer

Hiring Organisation
Sanderson Government and Defence
Location
Telford, Shropshire, West Midlands, United Kingdom
Employment Type
Contract
Contract Rate
Up to £620 per day + Inside IR35
contributing to the delivery of scalable and reliable applications. Required Skills Java Spring Boot JUnit Desirable Skills JPA Kibana Maven Mockito AWS GitLab Helm OpenAPI SQL Shell Scripting Reasonable Adjustments: Respect and equality are core values to us. We are proud of the diverse and inclusive community we have ...

Java Engineer

Hiring Organisation
Sanderson Government and Defence
Location
Telford, Shropshire, United Kingdom
Employment Type
Contract
Contract Rate
GBP 620 Daily
contributing to the delivery of scalable and reliable applications. Required Skills Java Spring Boot JUnit Desirable Skills JPA Kibana Maven Mockito AWS GitLab Helm OpenAPI S click apply for full job details ...

Data Security and Integration Architect - NPPV3 SC Cleared

Hiring Organisation
Synergize Consulting Limited
Location
United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£650 per day
federated or distributed data-access architectures where data remains under the control of the source organisation. Strong API architecture experience, including RESTful APIs, OpenAPI specifications, contract management, versioning, pagination and error handling. Experience designing common or canonical data models and mapping different source schemas into a consistent target model. ...

Product Manager

Hiring Organisation
Randstad Digital
Location
Manchester, North West, United Kingdom
Employment Type
Contract
Contract Rate
£70 - £75 per hour
microservices, ensuring high availability, speed, and scalability. Technical & AI Execution: Work with engineers and data teams to design data models, APIs (REST/OpenAPI), recommendation engines, and AI workflows. Data Governance: Build clear data policies and frameworks across multi-market products. Agile Delivery: Write clear user stories (BDD/… Requirements Experience: 8+ years as a Technical PM managing high-scale APIs, platforms, or data products. Technical Skills: Deep understanding of API design (OpenAPI/Swagger/Postman), system design, and database tools (SQL/Python basics). AI & Cloud: Exposure to cloud infrastructure (GCP/Azure/ ...

WebMethods Developer

Hiring Organisation
Opus Recruitment Solutions Ltd
Location
United Kingdom
Employment Type
Contract
Contract Rate
GBP 550 - 575 Daily
Role: webMethods Developer Type: Contract (Inside IR35) Duration: 6 months Location: London/Bristol (Twice a month) Clearance Required: Active SC Overview: Working within an agile integration delivery team developing and supporting a mission critical ...

WebMethods Developer

Hiring Organisation
Experis
Location
West End, London, Charing Cross, United Kingdom
Employment Type
Contract
Contract Rate
£650 - £690/day
WebMethods Developer Pay Rate: Up to £690 per day umbrella only Clearance Required: Active MOD SC Duration: 6 months Location: Hybrid - 1 day per week in the office in either Bristol or London Job Description ...

SAP Technical Architect

Hiring Organisation
TXP
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £625/day
practices for SAP integration delivery. What You'll Be Working On You'll help shape and deliver improvements across areas such as: SAP API & OpenAPI Enablement - accelerating API specification generation, validation, and governance. Documentation Automation - using AI and tooling to simplify and improve the creation of SAP technical … ability to demonstrate measurable business value. Desirable Skills & Experience Experience with SAP PI/PO, SAP Integration Suite, or similar integration platforms. Knowledge of OpenAPI specifications and contract-first API development. Experience with automated API testing and quality assurance tooling. Exposure to AI-assisted software development and engineering productivity ...