25 of 25 Permanent OpenAPI Jobs in England

and maintainability. +Practical experience working with AWS cloud environments (e.g., EC2) and a solid understanding of container orchestration using Kubernetes (K8s). +Extensive background in developing RESTful APIs, including OpenAPI/Swagger-driven interface design and implementation. +Familiar with CI/CD practices, pipeline automation, and test-driven development approaches. +Strong command of SQL databases, including schema migrations (e.g. More ❯

code quality and maintainability. Strong knowledge of DevOps and Git best practices. Experience automating version control, testing, and releases, preferably with GitHub Actions. Nice-to-haves: 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 and ML tools (e.g., NumPy, pandas More ❯

code quality and maintainability. Strong knowledge of DevOps and Git best practices. Experience automating version control, testing, and releases, preferably with GitHub Actions. Nice-to-haves: 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 and ML tools (e.g., NumPy, pandas More ❯

improvement of the development process Essential Technical Skills Language - JavaScript, NodeJS, Typescript Framework - NestJS/Express/Microservices Testing - Jest/Mocha/Cypress/React testing Library API – OpenAPI/GraphQL/GRPC Messaging - AMQP/RabbitMQ/Kafka Data Storage - MongoDB/Mongoose Web UI - Angular/ReactJS/Svelte/Webpack/HTML/CSS Security More ❯

improvement of the development process Essential Technical Skills Language - JavaScript, NodeJS, Typescript Framework - NestJS/Express/Microservices Testing - Jest/Mocha/Cypress/React testing Library API – OpenAPI/GraphQL/GRPC Messaging - AMQP/RabbitMQ/Kafka Data Storage - MongoDB/Mongoose Web UI - Angular/ReactJS/Svelte/Webpack/HTML/CSS Security More ❯

with in-store content personalisation 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-time insights into user flows More ❯

with in-store content personalisation 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-time insights into user flows More ❯

in: .NET (C#) Unit & integration testing CI/CD pipeline development (GitHub or similar) AWS services (IAM, Lambda, API Gateway) Angular, REST APIs, Web API development SpecFlow (BDD), Postman, OpenAPI MS SQL Server (SQL) & MongoDB (NoSQL) Docker Experience with CQRS and Event Bus architecture is highly desirable Responsibilities for Software Engineering Team Leader Lead, mentor, and support a team More ❯

Great In this role, you’ll get to: Design scalable backend architecture using FastAPI and Python for high-performance workloads Build and maintain robust APIs following RESTful conventions and OpenAPI/Swagger standards Own the performance of PostgreSQL databases , including partitioning, indexing, and horizontal scaling strategies Secure and optimise infrastructure using Docker, AWS, and infrastructure-as-code (IaC) tools More ❯

Building front-end applications with Angular and developing RESTful APIs/Web APIs Implementing Behaviour-Driven Development (BDD) using SpecFlow API testing and validation with Postman Implementing and maintaining OpenAPI specifications Database experience: MS SQL Server (SQL) MongoDB (NoSQL) Containerization and deployment using Docker Location: BuckinghamshireSalary: £65,000 - £75,000C# - .Net - Angular - CI/CD - AWS - Postman - Docker - Rest More ❯

Infrastructure-as-Code (Terraform) and CI/CD systems. Deep knowledge of containers, orchestration (Kubernetes), and service-mesh patterns (Istio). Strong API design and security skills (REST/OpenAPI, authN/Z, mTLS, certificate lifecycle). Scripting proficiency in Bash, PowerShell, or Python. Depth in either Azure or GCP, with readiness to cross-train: Azure: ARM/Bicep More ❯

logging and alerting tools. What We're Looking For 5+ years of AWS integration experience, including secure deployments on Lambda and EKS . Strong API design and security expertise (OpenAPI, OAuth2, JWT). Proven integration experience with SAP, Salesforce, Oracle . Proficiency in Flask, FastAPI , or similar frameworks in cloud-native environments. Experience with event-driven patterns and AWS More ❯

are looking for the following experience: 5+ years' AWS integration experience, including secure deployments on Lambda and Kubernetes (EKS). Expertise in API design and security using API Gateway, OpenAPI, OAuth2, JWT, and service policies. Strong integration background with platforms like SAP, Salesforce, and Oracle ERP. Proficiency in Flask, FastAPI, or similar frameworks, deployed in cloud-native environments. Experience More ❯

data analysis within an IT or technical environment. Strong proficiency in SQL and scripting languages including Python or R. Practical experience with RESTful API design, documentation (e.g. Swagger/OpenAPI), and testing tools (e.g. Postman). Working knowledge of cloud platforms (primarily Azure) and associated data services. Strong understanding of data modelling, ETL workflows, and system integration. Services offered More ❯

data analysis within an IT or technical environment. Strong proficiency in SQL and scripting languages including Python or R. Practical experience with RESTful API design, documentation (e.g. Swagger/OpenAPI), and testing tools (e.g. Postman). Working knowledge of cloud platforms (primarily Azure) and associated data services. Strong understanding of data modelling, ETL workflows, and system integration. Services offered More ❯

logging, monitoring, and observability practices. Fluent in English - comfortable working with global stakeholders and clients. Bonus Skills Experience integrating with financial or ERP systems . Knowledge of Swagger/OpenAPI documentation for public APIs. Familiarity with Azure services and automation tools such as Power Automate or Zapier . Exposure to IoT or Telematics platforms . Awareness of ISO More ❯

developer experience across different industries Good understanding of GitOps Good understanding of Container deployments Good understating of CI/CD pipelines Demonstratable knowledge of the Public Cloud Working with OpenAPI specifications and APIs generally Linux system admin and network operations Desirable Good understanding of IP Networking IPv4 and IPv6 stack Awareness of Telco/ISP networking IP stack e.g. More ❯

authentication, encryption, GDPR). Great communication skills—because explaining tech shouldn’t feel like decoding hieroglyphics. Bonus points if you’ve: Worked with financial or ERP systems. Swagger/OpenAPI experience. Played around with Azure or automation tools like Power Automate/Zapier. Dabbled in IoT or telematics. To find out more feel free to reach out to me More ❯

authentication, encryption, GDPR). Great communication skills—because explaining tech shouldn’t feel like decoding hieroglyphics. Bonus points if you’ve: Worked with financial or ERP systems. Swagger/OpenAPI experience. Played around with Azure or automation tools like Power Automate/Zapier. Dabbled in IoT or telematics. To find out more feel free to reach out to me More ❯

architectural standards and best practices. Key Skills & Experience: Proven experience in a Data Analyst or similar technical role. Strong hands-on experience with RESTful API design , documentation (Swagger/OpenAPI), and testing tools (e.g. Postman). Proficiency in SQL and scripting languages such as Python or R . Solid understanding of data modelling, ETL processes , and system integration . More ❯

documentation. Experience with monitoring, logging , and maintaining observable integration environments. Desirable Experience Prior experience integrating with financial or ERP systems. Hands-on development of Open APIs with Swagger/OpenAPI documentation. Familiarity with Azure services and cloud-based automation tools (e.g., Power Automate, Zapier). Exposure to IoT or Telematics platforms and data handling. Awareness of standards like ISO More ❯

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, and helping engineering teams deliver More ❯

at Performativ, you'll lead the design and implementation of robust, high-throughput APIs and backend systems. Everything we build is grounded in open web standards -HTTP, JSON, webhooks, OpenAPI -and built for scale, reliability, and clear interoperability. You'll work on the core systems that power mission-critical financial infrastructure for institutions across Europe. What you'll do … Design and implement modern, standards-based APIs using REST and OpenAPI specifications Build scalable backend systems that handle millions of HTTP/JSON transactions daily with low latency Develop and maintain secure, event-driven integrations via webhooks and callback mechanisms Lead the backend design of new products and services, ensuring interoperability and long-term maintainability Optimize for resilience, observability … re looking for 10+ years of backend engineering experience, with a strong focus on API development and integration Deep understanding of open web standards including HTTP, JSON, webhooks, and OpenAPI Track record of building reliable, low-latency systems at scale handling millions of daily API calls Experience with backend languages like Go, TypeScript (Node.js), Python, or PHP in production More ❯

approximately once a fortnight. Key Responsibilities: Design and deliver high-performance, public-facing REST APIs and system integrations within a modern Azure environment. Produce API documentation that adheres to OpenAPI 3.x standards. Lead and mentor a small, focused development team, promoting collaboration, code quality, and technical excellence. Modernise legacy systems and drive the development of next-generation, cloud-native … across Azure SQL, Cosmos DB, Service Bus, Function Apps, APIM, Front Door, Auth0, and WebSockets. Proven ability to design APIs from the ground up that follow REST principles and OpenAPI 3.x standards. Hands-on experience with Azure DevOps pipelines, automation, and performance tuning. A mindset focused on continuous improvement, security-first design, and delivery excellence. Degree in Computer Science More ❯

Development & Integration Build production-grade APIs using C# .NET, SQL, and Azure services Develop event-driven architectures and asynchronous communication patterns where appropriate Ensure APIs are well-documented using OpenAPI/Swagger standards Build and maintain a developer portal for internal and external API consumers Quality & Operations Implement comprehensive observability including logging, monitoring, and alerting Design for reliability, fault … similar services Authentication & authorization expertise with OAuth 2.0, JWT, API keys, and modern security patterns Testing mindset - you write unit tests and understand integration testing API documentation experience using OpenAPI/Swagger and maintaining developer portals Production systems mindset covering observability, reliability, and operational excellence Architectural thinking - ability to design systems for scale, security, and evolution Keywords RESTful APIs … C# .Net Azure AI LLM ML Machine Learning SaaS Scale Up OAuth 2.0 Service Bus OpenAPI Swagger More ❯