16 of 16 Contract API Design Jobs

Solutions Architect – SC Cleared – Bristol – Contract Our client is looking to recruit an experienced Leader and Design Authority to fulfil the System Design Authority (SDA) role for a key Project. The Solutions Architect should bring leadership and governance to support the solution's development and ensure the design aligns with the strategic vision. The Solutions Architect will … in the disciplines involved in full lifecycle software and systems Engineering. In particular, you should have good experience in systems integration, with a strong emphasis on software-led integration, API design and implementation, and secure interoperability, alongside basic networking skills. What you will do: The Solutions Architect will be responsible for the end-to-end design and … implementation of a key software system. This will include analysis and design, assisting with and governing software development and hosting, and achieving successful IT health checks, testing, and deployment. About You: As an experienced Solutions Architect, you will have an outstanding range of knowledge and experience in integrating systems containing electronic, electrical, and mechanical components and sub-systems. Specific More ❯

Halian Technology are searching for an Interim API Integrations Specialist to join our client's forward-thinking technology team. Our client is a dynamic and rapidly growing energy supplier based in Oxfordshire, committed to driving business success through smart, reliable energy solutions. Our client challenges the existing marketplace with a tech-driven, customer-focused approach and foster a culture … designing cutting-edge integrations, delivering high-quality solutions, and want to work in a company where your expertise is valued and supportedthis is the role for you. Key Responsibilities: Design, develop, and maintain API integrations between internal systems and external SaaS platforms. Collaborate with product, data, and engineering teams to identify integration requirements and deliver robust solutions. Monitor … and troubleshoot integration workflows, ensuring data consistency across platforms. Translate business requirements into technical specifications for system connectivity. Build and maintain API documentation, providing guidance on integration best practices. Ensure all integrations meet compliance, security, and performance standards. Work closely with SaaS vendors and partners to coordinate technical efforts. Key Requirements: Essential: Strong expertise in digital engineering, CMS design More ❯

Senior API Technical Consultant (GraphQL Specialist) Design and build next generation of high-scale SaaS platforms. We're looking for a senior/lead engineering consultant with deep expertise in GraphQL to take a leading role in developing our robust TypeScript/Node.js backend. You will be instrumental in shaping our technical direction, driving the evolution of our … APIs, ensuring our services are resilient, scalable and secure within a cutting-edge, cloud-native environment (Helm, Kubernetes). The Deliverables Design and build sophisticated, scalable GraphQL APIs and backend services using TypeScript and Node.js. Lead the design and evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. Champion best … team to guide process improvements and make key architectural decisions. Experience Extensive production experience architecting and delivering complex applications with TypeScript and Node.js . Expert level GraphQL , including advanced API design, schema evolution, performance optimisation. Strong automated testing frameworks like Vitest and Playwright . Proficiency with modern DevOps tooling and cloud-native architecture, including Docker , Helm , Kubernetes . More ❯

the technical direction for our development teams. This role bridges development and operations while ensuring secure, scalable, and resilient systems. The ideal candidate will have deep experience in AWS, API management, infrastructure automation, and secure software development practices, combined with the ability to guide teams on security posture, vulnerability management, and compliance alignment. Key role and responsibilities Architecture & Technical … standards with a focus on security, resilience, and scalability. Provide technical direction and mentorship to development and DevOps teams. Drive adoption of secure coding practices, threat modelling, and resilient design patterns. Security & Compliance Implement and maintain security best practices across CI/CD pipelines and infrastructure. Lead vulnerability management, including scanning, remediation, and dependency upgrades. Ensure API security … using OAuth, JWT, API keys, and other mechanisms. Collaborate with InfoSec teams to align with organizational compliance frameworks. Platform Maintenance & Resilience Oversee regular upgrades of libraries, packages, and infrastructure components. Establish disaster recovery strategies, high availability configurations, and resilience testing. Automate upgrade workflows using Infrastructure-as-Code and CI/CD tools. Infrastructure & DevOps Design and manage secure More ❯

you can really make a difference. We have a great opportunity for an Apigee Java Developer to join the team. We are seeking a skilled Apigee Java Developer to design, develop, and maintain enterprise-grade APIs using Apigee Edge or Apigee X. The ideal candidate will have strong hands-on experience in Java, RESTful services, and API gateway … solutions. Key Responsibilities: Design and implement RESTful APIs using Java (Spring Boot, JAX-RS, Hibernate). Develop API proxies, policies, and shared flows in Apigee. Integrate Back End microservices with Apigee API Gateway. Ensure API security using OAuth2, JWT, API Keys, etc. Monitor and optimize API performance and scalability. Collaborate with cross-functional teams … for API life cycle management. Troubleshoot and resolve API-related issues. Document API designs, configurations, and development processes. Key Skills & Experience: Strong proficiency in Java, Spring Boot, and RESTful APIs. Ideally 2+ years of hands-on experience with Apigee Edge or Apigee X. Experience with API security standards (OAuth, JWT). Familiarity with CI/CD More ❯

and product owners to deliver reliable, production-grade systems. This is a 6-month contract role based in Leeds, UK , with a strong possibility of extension . Key Responsibilities: Design, develop, and deploy scalable backend microservices using Java 17 and Spring Boot . Configure and maintain DevOps pipelines on Google Cloud Platform (GCP) to support the credit decisioning engine. … and microservices architecture . Java 17: Hands-on experience is mandatory . DevOps & Cloud: Proven experience with GCP , AWS , or Azure , and familiarity with CI/CD pipelines . API Development: Expertise in RESTful API design and development. Frontend: Working knowledge of ReactJS or Angular . Testing: Strong background in automated testing , including JUnit . Mindset: Excellent More ❯

transformation programme, and are looking for an experienced Integration Architect to join on a 12-month contract . This role is ideal for someone who specialises in system integration, API design, and cloud-based architecture (Azure) and enjoys shaping strategy as well as guiding delivery teams. Key Responsibilities Define and deliver the integration architecture strategy for a group … wide transformation. Design and govern API-led integrations, interface specifications, message schemas, and data flows. Work closely with Solution Architects, Cloud Architects, Product Owners and delivery teams to ensure scalable, secure and future-proof integration solutions. Champion integration best practices, standardisation and reusability across programmes. Provide technical leadership, documentation, and mentorship to delivery teams. Ensure all integration solutions … data protection standards. What We're Looking For Proven experience as an Integration Architect/Solution Architect with strong integration focus Hands-on knowledge of Microsoft Azure integration services (API Management, Service Bus, Logic Apps, Event Grid, etc.) Strong understanding of enterprise integration patterns, API management platforms (Apigee/Azure API Mgmt) Experience working in agile delivery More ❯

every year of education • At least 8-10 years of experience with Information Technology Key Responsibilities • Develop and maintain enterprise-scale .NET applications using ASP.NET Core 9.0 and C# • Design and implement RESTful APIs for biogas trading, inventory management, and regulatory reporting • Build complex business logic for RINS credit calculations, LCFS compliance, and carbon credit trading • Work with PostgreSQL … and Microsoft Identity Platform • Develop email workflow systems and automated reporting for regulatory compliance • Create scheduled background jobs using Quartz.NET for data processing and calculations • Integrate with Microsoft Graph API for SharePoint document management via Azure MS Graph • Build real-time features using SignalR for live trading updates • Implement data validation using FluentValidation • Work with Docker and OpenShift for … containerized deployments Required Technical Skills • 5+ years of experience with .NET development (C#, ASP.NET Core) • Strong experience with Entity Framework Core and PostgreSQL • Proficiency in RESTful API design and OpenAPI/Swagger documentation • Experience with authentication systems (OAuth2, JWT, Azure AD) • Knowledge of containerization (Docker) and Kubernetes/OpenShift • Experience with background job processing and scheduled tasks • Understanding More ❯

based applications that leverage generative AI capabilities. This hands-on position requires deep technical expertise to translate business needs into robust, scalable, and intelligent software solutions. Your responsibilities: Software Design & Development: Design, develop, and maintain high-quality, scalable, and efficient software applications and services. Write clean, well-documented, and maintainable code following established best practices. Translate complex business … requirements into detailed technical specifications, architectural designs, and API contracts. Create and implement microservice architectures via APIs and services, ensuring seamless integration and data flow. GenAI Application Development: Develop and integrate advanced Generative AI models and Agentic AI approaches into new and existing applications. Optimize application code and architecture for performance, scalability, security, and cost-effectiveness. Work with data … engineers, to deliver features iteratively. Participate actively in agile ceremonies (e.g., stand-ups, sprint planning, retrospectives). Create and maintain comprehensive technical documentation, including code documentation, system designs, and API specifications. Security & Compliance (Application Layer): Ensure all software solutions adhere to secure coding practices, data privacy regulations, and compliance standards. Implement robust security measures within the application code, including More ❯

and Spring Boot experience, solid understanding of Kubernetes and AWS services, and hands-on database development with SQL-based systems. Familiarity with mobile integrations (iOS/Android native), RESTful API design, and Agile delivery methodologies will be highly beneficial. This is an exciting opportunity to work in a dynamic FinTech environment where innovation, quality, and performance are at More ❯

ll bring: Proven experience in software integration, with skills in Python, C, Powershell, and CI/CD pipelines Strong knowledge of architectural patterns such as SOA, Microservices, ESB, and API design Expertise in designing and implementing integration solutions for COTS and custom software Familiarity with containerisation (Docker), orchestration (Kubernetes), and virtualisation (VMware, IaaS tools like Ansible, Terraform) Excellent More ❯

backend expertise with Kotlin and Spring Boot (ESSENTIAL) Skilled in designing and maintaining microservices architectures . Confident working with SQL databases (PostgreSQL, MySQL or equivalent). Understanding of RESTful API design and third-party integrations. Experience with testing frameworks , debugging, and performance optimisation. Familiarity with AWS, Docker/Kubernetes and CI/CD pipelines (desirable) Key Responsibilities: Develop … and microservices . Build and optimise SQL schemas and queries for performance and scalability. Integrate APIs and third-party services into core systems. Collaborate with cross-functional teams to design scalable, maintainable software solutions . Participate in code reviews , contributing to team standards and documentation. Support production deployments, monitoring, and issue resolution. Continuously improve application performance, reliability, and user More ❯

Stack or Backend Developer to play a key role in shaping the backend of our next-generation B2C platform. You’ll work closely with our front-end team to design and deliver robust, scalable APIs and infrastructure that power our consumer experience. What You’ll Do: Develop and maintain production-grade APIs and backend systems using Node.js. Leverage AI … and security for scale. Collaborate with front-end engineers to integrate APIs seamlessly. What We’re Looking For: Extensive experience building high-traffic consumer applications. Strong understanding of RESTful API design, database optimization, and security. Proven AI-assisted development workflow. Ability to work autonomously within established technical frameworks. Nice to Have: React/Next.js, Azure, Payload CMS, microservices More ❯

ASAP What we're looking for: 4+ years' experience in software engineering (SaaS or start-up background preferred) Strong proficiency in Python and C#, with hands-on experience in API design and cloud architecture (Azure). Experience with Excel add-ins or Office JavaScript APIs is highly desirable. Exposure to vectorization, RAG (Retrieval-Augmented Generation), or AI-driven … Background or interest in commercial real estate technology. Self-starter with excellent communication skills and the ability to operate autonomously in a dynamic, growing business. What you'll do: Design & Develop: Build and maintain robust back-end services and APIs powering the company's automation suite. Integrate Smartly: Enhance and expand integrations across Microsoft 365 applications (Excel, Word, PowerPoint … . Architect Systems: Help design scalable, secure, and high-performance data infrastructure. Collaborate: Partner closely with the founding team and business stakeholders to translate complex workflows into elegant technical solutions. Lead by Example: Take control of the project, uphold code quality, and drive best practices across the stack. Shape the Future: Contribute to the long-term technical roadmap and More ❯

ASAP What we're looking for: 4+ years' experience in software engineering (SaaS or start-up background preferred) Strong proficiency in Python and C#, with hands-on experience in API design and cloud architecture (Azure). Experience with Excel add-ins or Office JavaScript APIs is highly desirable. Exposure to vectorization, RAG (Retrieval-Augmented Generation), or AI-driven … Background or interest in commercial real estate technology. Self-starter with excellent communication skills and the ability to operate autonomously in a dynamic, growing business. What you'll do: Design & Develop: Build and maintain robust back-end services and APIs powering the company's automation suite. Integrate Smartly: Enhance and expand integrations across Microsoft 365 applications (Excel, Word, PowerPoint … . Architect Systems: Help design scalable, secure, and high-performance data infrastructure. Collaborate: Partner closely with the founding team and business stakeholders to translate complex workflows into elegant technical solutions. Lead by Example: Take control of the project, uphold code quality, and drive best practices across the stack. Shape the Future: Contribute to the long-term technical roadmap and More ❯

days in-office per week, occasional on-site workshops Contract: Initial 6-month contract (potential for extension) Overview: We are seeking an experienced Solution Architect to lead the design and delivery of integration solutions within our Asset Management ecosystem. The successful candidate will play a key role in defining target architectures, delivering integration designs, and ensuring seamless interoperability between … technically adept, business-minded professional who can bridge operational and technology teams, deliver robust integration solutions, and communicate effectively with stakeholders across the organization. Key Responsibilities: Lead the Integration Design for a fault reporting solution, including ServiceNow and IBM Maximo integration. Define and document the Target Architecture for the wider Asset Management ecosystem. Collaborate with business, operational, and technical … years’ experience in Solution Architecture , ideally within large, complex corporate environments. Strong understanding of Asset Management Systems and associated data models. Proven experience with ServiceNow platform and integration design . Experience with IBM Maximo (or alternative EAM platforms such as IFS or Ultimo ). Proficiency in data integration , API design , and user interface considerations . Familiarity with More ❯