26 to 43 of 43 OpenAPI Jobs in the UK

with structured data formats (JSON, XML, CSV) Familiarity with synchronous/asynchronous architecture concepts Desirable: Exposure to programming languages (Java, JavaScript, Python, Go) Working knowledge of APIs (Swagger/OpenAPI 3), shell scripting, and AWS Experience with CloudFormation templates and AWS administration Previous involvement in technical authorship or documentation Security & Inclusivity Due to the nature of our clients, candidates More ❯

with structured data formats (JSON, XML, CSV) Familiarity with synchronous/asynchronous architecture concepts Desirable: Exposure to programming languages (Java, JavaScript, Python, Go) Working knowledge of APIs (Swagger/OpenAPI 3), shell scripting, and AWS Experience with CloudFormation templates and AWS administration Previous involvement in technical authorship or documentation Security & Inclusivity Due to the nature of our clients, candidates More ❯

with structured data formats (JSON, XML, CSV) Familiarity with synchronous/asynchronous architecture concepts Desirable: Exposure to programming languages (Java, JavaScript, Python, Go) Working knowledge of APIs (Swagger/OpenAPI 3), shell scripting, and AWS Experience with CloudFormation templates and AWS administration Previous involvement in technical authorship or documentation Security & Inclusivity Due to the nature of our clients, candidates More ❯

SaaS, APIs, cloud computing (AWS, Azure), and financial/accounting technologies. Experience with APIs, web services, middleware, and API tools and technologies such as GitHub, REST API, microservices, Postman, OpenAPI, etc. Capacity to create technical assets to improve team efficiency (e.g., Postman collections, automation scripts, web tools). Ability to work collaboratively across product and engineering teams to drive More ❯

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 ❯

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 ❯

of software architectures, networking, and data formats (JSON, XML, CSV) Experience with both synchronous and asynchronous systems Confident communicator with stakeholders at all levels Desirable: Knowledge of Swagger/OpenAPI 3 Experience with shell scripting, Terraform, Ansible Familiarity with AWS and infrastructure management Experience in technical authorship/documentation Why join TwinStream? We value deep thinking, real collaboration, and More ❯

technical documentation and API contracts What we're looking for; 1-2 years of hands-on Mulesoft Anypoint experience (or similar!)Strong understanding of API-led connectivity, RAML/OpenAPI, and RESTful APIsFamiliarity with tools like Postman, Git, CloudHub, Runtime Manager and DataWeaveA proactive communicator who enjoys working across technical and non-technical teams Nice-to-haves; Experience with More ❯

technical documentation and API contracts What we're looking for; 1-2 years of hands-on Mulesoft Anypoint experience (or similar!) Strong understanding of API-led connectivity, RAML/OpenAPI, and RESTful APIs Familiarity with tools like Postman, Git, CloudHub, Runtime Manager and DataWeave A proactive communicator who enjoys working across technical and non-technical teams Nice-to-haves More ❯

technical documentation and API contracts What we're looking for; 1-2 years of hands-on Mulesoft Anypoint experience (or similar!) Strong understanding of API-led connectivity, RAML/OpenAPI, and RESTful APIs Familiarity with tools like Postman, Git, CloudHub, Runtime Manager and DataWeave A proactive communicator who enjoys working across technical and non-technical teams Nice-to-haves More ❯

Experience with structured data formats (JSON, XML, CSV) Knowledge of synchronous/asynchronous architectures Desirable: Exposure to Java, JavaScript, Python, or Go Familiarity with API specifications (e.g. Swagger/OpenAPI 3) Experience with shell scripting or AWS administration Understanding of CloudFormation templates Background in technical authorship/documentation Security & Diversity Due to the nature of the work, this role More ❯

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 ❯

Creating and maintaining technical documentation and API contracts What we're looking for; 1-2 years of Integration exposure (or similar!)Strong understanding of API-led connectivity, RAML/OpenAPI, and RESTful APIsFamiliarity with tools like Postman, Git, CloudHub, Runtime Manager and DataWeaveA proactive communicator who enjoys working across technical and non-technical team Nice-to-haves; Experience with More ❯

Creating and maintaining technical documentation and API contracts What we're looking for; 1-2 years of Integration exposure (or similar!) Strong understanding of API-led connectivity, RAML/OpenAPI, and RESTful APIs Familiarity with tools like Postman, Git, CloudHub, Runtime Manager and DataWeave A proactive communicator who enjoys working across technical and non-technical team Nice-to-haves More ❯

and deployment of key applications. As a Node.js Developer, you will: • Design, develop, and maintain scalable and performant backend microservices using Node.js • Implement RESTful APIs and manage specifications using OpenAPI/YAML • Work with GCP-native technologies and containerised deployments in Docker/Kubernetes • Collaborate across DevOps teams on CI/CD pipelines and deployment automation • Develop API management … and Payments platforms • Identity and access management systems • Service Mesh technologies such as Istio • Experience with ESB/SOA , GraphQL, Gradle/Maven Nice to Have: • Knowledge of Swagger, OpenAPI 3.0, SOAP, MQ, JSON • Experience with performance optimisation and high-availability architecture • Exposure to CI/CD automation and testing frameworks Node.js Developer Key Benefits: • Competitive daily rate More ❯

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 ❯

APIs and services. Key Responsibilities: Design and build scalable APIs and microservices using Go Work with serverless technologies including AWS Lambda and SST Implement and document RESTful services using OpenAPI Work with both SQL and NoSQL data stores Contribute to a culture of clean code, testing, and continuous improvement Collaborate with cross-functional teams in an agile environment Were … working with a team that shares those values. You might have: Solid experience developing with Go Experience building serverless applications (AWS Lambda, SST) Familiarity with API-first design and OpenAPI documentation Knowledge of both SQL and NoSQL data storage solutions A proactive, collaborative approach to problem-solving Experience working in agile teams and delivering iteratively Why Join Us Work More ❯

APIs and services. Key Responsibilities: Design and build scalable APIs and microservices using Go Work with serverless technologies including AWS Lambda and SST Implement and document RESTful services using OpenAPI Work with both SQL and NoSQL data stores Contribute to a culture of clean code, testing, and continuous improvement Collaborate with cross-functional teams in an agile environment We … working with a team that shares those values. You might have: Solid experience developing with Go Experience building serverless applications (AWS Lambda, SST) Familiarity with API-first design and OpenAPI documentation Knowledge of both SQL and NoSQL data storage solutions A proactive, collaborative approach to problem-solving Experience working in agile teams and delivering iteratively Why Join Us Work More ❯