OpenAPI Jobs in London

1 to 25 of 26 OpenAPI Jobs in London

Full Stack Developer (Java/Angular)

London Area, United Kingdom
CACI Ltd
/CD: TeamCity Desirable Skills: Docker and Containerization Monitoring and Logging (e.g., Prometheus, Grafana, ELK Stack) Cloud Platforms (AWS, Azure, Google Cloud) Security and Compliance API Documentation (e.g., Swagger, OpenAPI) Code Quality Tools (e.g., SonarQube) Agile Methodologies (Scrum or Kanban) Soft Skills: Team Collaboration : Ability to work effectively with cross-functional teams, sharing knowledge and expertise. Proactive Approach : Anticipate More ❯
Posted:

Full Stack Developer (Java/Angular)

City of London, London, United Kingdom
CACI Ltd
/CD: TeamCity Desirable Skills: Docker and Containerization Monitoring and Logging (e.g., Prometheus, Grafana, ELK Stack) Cloud Platforms (AWS, Azure, Google Cloud) Security and Compliance API Documentation (e.g., Swagger, OpenAPI) Code Quality Tools (e.g., SonarQube) Agile Methodologies (Scrum or Kanban) Soft Skills: Team Collaboration : Ability to work effectively with cross-functional teams, sharing knowledge and expertise. Proactive Approach : Anticipate More ❯
Posted:

Lead Engineer, Back End, Agentic intelligence

London, United Kingdom
Group M Worldwide Inc
You have a passion for improving coding and development practices. You have worked with microservices communicating over a range of interfaces. You understand how the web works, REST APIs, OpenAPI spec/Swagger, GraphQL, and the difference between REST and RPCs. You understand TDD, BDD, unit testing, integration testing and when to use them. You are familiar with trunk More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Software Engineer Consultant

London, United Kingdom
Hybrid / WFH Options
Different Technologies Pty Ltd
a consultancy or industry setting Experience with multiple programming languages, including Python, Java, C++, Rust, or Go Experience with associated software development frameworks and tools such as pytest and OpenAPI Experience working in Unix/Linux environments Knowledge of database systems and proficiency in database query languages/tools Familiarity with software development methodologies, such as Agile or Scrum. More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Front End Developer

London, South East, England, United Kingdom
Hybrid / WFH Options
FDM Group
willingness to undergo Non-Police Personnel Vetting (NPPV3) Proven experience across the full software development lifecycle Strong front-end development skills, with a particular specialism in React Experience implementing OpenAPI specifications and developing mock services Ability to lead a development team and coordinate the work of junior developers and designers Practical coding experience in live projects — ideally as a More ❯
Employment Type: Contractor
Rate: £50,000 - £60,000 per annum
Posted:

Mulesoft Architect

London, United Kingdom
Hybrid / WFH Options
N Consulting Limited
Required Skills & Experience: 8+ years of experience in integration architecture with at least 4+ years of hands-on MuleSoft experience. Strong expertise in API design (RESTful APIs, RAML/OpenAPI) and API Management. Experience working with MuleSoft Anypoint Studio, Runtime, API Manager, and Exchange . Proficiency in DataWeave , Mule connectors , and custom policies. Solid understanding of MongoDB and its More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Frontend Engineer (UK Loans)

London, United Kingdom
Hybrid / WFH Options
Lendable
such as Server Components , and the NextJS app folder, and have a good understanding of how you would approach a migration toward this new architecture. You've worked with OpenAPI/Swagger specifications to help define API requirements and contracts, collaborating with backend developers to agree on best approaches when scoping work that requires new and updated schemas. You More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Sr. AI Systems Engineer

London, United Kingdom
Cervin
master's degree in computer science or a related field 6+ years of experience as a Software Engineer Extensive experience in Python Proven experience working with RESTful APIs and OpenAPI, gRPC, and Protobuf, with knowledge of their design best practices and common libraries Proven experience interfacing with AI projects, with a focus on computer vision and geometry Proven experience More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Software Engineer (Fullstack) London, Greater London, England, United Kingdom

London, United Kingdom
Zuora Inc
development Enthusiasm for using AI tooling to aid development Proven experience deploying, monitoring, and troubleshooting microservices in a production environment at scale. Designing quality APIs (like REST, gRPC, GraphQL, OpenAPI etc.) and integrating with 3rd party APIs. API Security (OAuth2, SAML, JWT etc) Strong at the usual best practices stuff: git, TDD, OOP principles (SOLID, design patterns etc) A More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Lead Front End Engineer(Agentic Intelligence)

London, United Kingdom
Group M Worldwide Inc
developers Working in a CI/CD environment Using containers/Docker Atomic or material design Agile/Scrum Sound understanding of coding standards and conventions Documentation Familiarity with OpenAPI Web Accessibility (specifically WAI-ARIA) Familiarity with Python and Go HATEOAS/Hypermedia API Life at WPP Media & Benefits Our passion for shaping the next era of media includes More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Software Engineer (Golang)

London, United Kingdom
Different Technologies Pty Ltd
3. Good understanding of GitOps 4. Good understanding of Container deployments 5. Good understating of CI/CD pipelines 6. Demonstratable knowledge of the Public Cloud 7. Working with OpenAPI specifications and APIs generally 8. Linux system admin and network operations Desirable 9. Good understanding of IP Networking IPv4 and IPv6 stack 10. Awareness of Telco/ISP networking More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Full Stack Dot Net Software Developer

West London, Greater London
Nexus Jobs Limited
Azure cloud services & setting up/managing resources/deploying apps Experience in implementing business process automation Capable of working with (and developing) multiple (REST) APIs documented with e.g. OpenAPI/swagger PowerBI, PowerQuery, Dax & M Other API messaging formats e.g. JSON, XML, SOAP Experience of structured testing and quality assurance approaches (e.g. Test Driven Development and Behaviour Driven More ❯
Employment Type: Permanent
Posted:

Full Stack .Net Software Developer

West London, Greater London
Nexus Jobs Limited
Azure cloud services & setting up/managing resources/deploying apps Experience in implementing business process automation Capable of working with (and developing) multiple (REST) APIs documented with e.g. OpenAPI/swagger PowerBI, PowerQuery, Dax & M Other API messaging formats e.g. JSON, XML, SOAP Experience of structured testing and quality assurance approaches (e.g. Test Driven Development and Behaviour Driven More ❯
Employment Type: Permanent
Posted:

Front and Backend C# Dot Net Javascript Software Developer with Umbraco

West London, Greater London
Nexus Jobs Limited
Azure cloud services & setting up/managing resources/deploying apps Experience in implementing business process automation Capable of working with (and developing) multiple (REST) APIs documented with e.g. OpenAPI/swagger PowerBI, PowerQuery, Dax & M Other API messaging formats e.g. JSON, XML, SOAP Experience of structured testing and quality assurance approaches (e.g. Test Driven Development and Behaviour Driven More ❯
Employment Type: Permanent
Posted:

C# Software Engineer

London, United Kingdom
Hybrid / WFH Options
Endeavour Recruitment Solutions
/or Kanban. Experience with XML development: XSD and XSLT (hands-on experience in XSLTs, DTD, XSDs). Experience with HTML DOM manipulation Familiarity with WSDL and Swagger/OpenApi web service definition formats. Experience working with stakeholders and business analysts to gather business requirements to derive functional and non-functional requirements. More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Business Analyst- Banking

London, United Kingdom
N Consulting Limited
payments, lending, treasury, or risk. Technical expertise in: SQL, data analysis, and data visualization tools (Power BI/Tableau/Qlik) APIs (knowledge of JSON, RESTful services, Swagger/OpenAPI specs) Excel, ETL tools, and basic scripting (Python is a plus) Experience working in Agile/Scrum environments. Strong documentation and communication skills. Ability to collaborate with cross-functional More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Backend Engineer

London, United Kingdom
Motorway
and caching strategies as our platform scales. Build highly maintainable, reusable, scalable, and reliable code (because nobody likes a code-astrophe!). Design sync and async APIs. We use OpenAPI and JSON Schema to bring a schema-first approach to our services. Manage our AWS infrastructure to ensure it's performing at its best, and keep a close eye More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Solution Architect - Engine by Starling

London, United Kingdom
Hybrid / WFH Options
Starling Bank
through technical guidance and troubleshooting, working closely with engineering and client success teams. Must Have Experience in software engineering and solution architecture throughout the delivery lifecycle Experience with APIs, OpenAPI, and sequence diagrams Client-facing experience and stakeholder relationship skills Strong communication skills for technical and non-technical audiences Nice to Have Experience in banking, payments, or related fields More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Business Systems Analyst

London, United Kingdom
Pontoon
services, payments, or fintech environment. Strong knowledge of API-based systems (REST, JSON, XML) and how to document and validate API requirements. Familiarity with tools like Postman, Swagger/OpenAPI, or similar for API analysis and testing. Experience working with Agile methodologies (SAFe preferred) and tools like Jira or Rally. Knowledge of systems development life cycles (waterfall, Agile, hybrid More ❯
Employment Type: Contract
Rate: £650 - £700/day
Posted:

Business Systems Analyst

London, South East, England, United Kingdom
Pontoon
services, payments, or fintech environment. Strong knowledge of API-based systems (REST, JSON, XML) and how to document and validate API requirements. Familiarity with tools like Postman, Swagger/OpenAPI, or similar for API analysis and testing. Experience working with Agile methodologies (SAFe preferred) and tools like Jira or Rally. Knowledge of systems development life cycles (waterfall, Agile, hybrid More ❯
Employment Type: Contractor
Rate: £650 - £700 per day
Posted:

Senior Product Manager

London, United Kingdom
CUBE Content Governance Global Limited
experience in design, testing (e.g. Postman), and integration workflows. Solid understanding of API security and authentication protocols (e.g. OAuth, API keys). Familiarity with API documentation frameworks (Swagger/OpenAPI) and developer portal best practices. Comfortable leading cross functional teams through technical discovery and user research. Proven ability to work through ambiguity, prioritise effectively, and deliver in fast-paced More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Technical Business Analyst

London, United Kingdom
Hybrid / WFH Options
N Consulting Limited
We are seeking a Technical Business Analyst with strong experience in capturing business and technical requirements and translating them into detailed API specifications, particularly using JSON and Swagger/OpenAPI . The ideal candidate will act as a bridge between business stakeholders and development teams, ensuring clear, accurate, and testable interfaces for service integration and system communication. Key Responsibilities … Work closely with stakeholders (product owners, developers, QA, and solution architects) to gather and document detailed functional and non-functional requirements. Create and manage API documentation using Swagger/OpenAPI standards. Design and review JSON-based interfaces for RESTful APIs and system integrations. Facilitate workshops and requirement-gathering sessions with technical and non-technical teams. Translate business needs into … Key Skills & Qualifications: Proven experience as a Technical Business Analyst , Systems Analyst, or API Business Analyst in Agile environments. Strong knowledge of RESTful API standards , JSON , and Swagger/OpenAPI specifications. Ability to write and review YAML or JSON-based Swagger files manually or using tools (e.g., SwaggerHub, Postman, Stoplight). Familiarity with API management platforms (e.g., Apigee, Azure More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Integration Lead

City, London, United Kingdom
Alexander Mann Solutions - Public Sector Resourcing
in a multi-supplier environment. Key Responsibilities . Lead the design and implementation of scalable integration solutions across enterprise systems. . Define and enforce API design standards (RESTful APIs, OpenAPI) and integration best practices. . Collaborate with cross-functional teams to map data flows and ensure accurate data transformation. . Evaluate and implement integration tools (API gateways, message brokers … a focus on root cause analysis. . Continuously assess and improve integration performance, scalability, and reliability. Essential skills . In-depth knowledge of API design principles including RESTful APIs, OpenAPI, and JSON/XML schemas. . Strong understanding of data mapping techniques and transformation logic. . Hands-on experience with integration technologies such as MuleSoft, Apache Kafka, Azure Logic More ❯
Employment Type: Contract
Rate: GBP Annual
Posted:

WebMethods Software Engineer

London, United Kingdom
Hybrid / WFH Options
Capgemini
Flat File adapters for seamless integration with external systems and databases. • API Management and Web Services -creating and consuming RESTful and SOAP-based web services, including WSDL, Swagger/OpenAPI specifications, and API Gateway configurations. • Error Handling and Logging Frameworks You can bring your whole self to work. At Capgemini, stiving for equity, diversity and inclusion is part of … adapters for seamless integration with external systems and databases. API Management and Web Services Skilled in creating and consuming RESTful and SOAP-based web services, including WSDL, Swagger/OpenAPI specifications, and API Gateway configurations. Your Security Clearance To be successfully appointed to this role, it is a requirement to obtain Security Check (SC) clearance. To obtain SC clearance More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Engineer, Application Support

London, United Kingdom
Consilio LLC
Monitor application health, performance, and availability levaraging observability platforms like Grafana and Kibana. Test and interact with API endpoints, documenting and validating their functionality using tools like Swagger/OpenAPI and Postman. Respond to support tickets promptly within defined SLAs, providing clear, timely updates and effective solutions to keep our users happy. Collaborate closely with cross functional teams, including … and performance tuning. Containerization : Hands on experience with Docker and Kubernetes, including pod management and log retrieval. APIs : Skilled in interacting with and testing RESTful APIs using Swagger/OpenAPI and Postman. Elastic Stack : Familiarity with Elasticsearch for log aggregation, indexing, and querying. Observability : Good understanding of monitoring and visualization concepts; experience with Grafana Scripting & Automation : Automation-first mindset More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:
OpenAPI
London
25th Percentile
£56,250
Median
£57,500
75th Percentile
£77,500