13 of 13 Contract API Design Jobs in London

role involves architecting and implementing enterprise-grade solutions using MuleSoft's Anypoint Platform , closely collaborating with architecture, development, and business stakeholders. Youll play a lead role in designing scalable API-led integrations and mentoring the development team to deliver production-ready, secure, and performant solutions. What You'll Be Doing Architect and implement integration solutions using MuleSoft Anypoint Platform … Lead and guide technical teams across design, development, and deployment phases Collaborate with functional and architecture teams to define reusable assets Ensure API design aligns with RAML standards , policies, and best practices Work across all API layers (system, process, and experience) as per API-led connectivity Provide hands-on guidance on error handling, deployment, debugging … containers for hybrid deployments Support Agile/DevOps lifecycle and CI/CD pipelines Ideal Candidate Profile 3+ years of experience with MuleSoft Anypoint Platform 8+ years in integration design and architecture Strong knowledge of API-led architecture , RAML, SLA policies Familiarity with core Mule connectors (batch, for-each, scatter-gather, etc.) Skilled in error handling, deployment pipelines More ❯

forward digital transformation in the industry. In this role, you will work closely with subject matter experts, product owners, technical leads, designers, and fellow architects to re-architect and design innovative solutions aligned with both business and technology strategies. A deep understanding of energy trading and risk management processes across front, middle, and Back Office functions-particularly within physical … trading-is essential. Your Responsibilities: Design and document the architecture of bespoke, modern energy trading systems. Lead functional and technical requirement gathering, analysis, and architectural design. Serve as a thought leader and advisor throughout delivery and design reviews. Communicate effectively across stakeholders, business functions, vendors, and consulting teams. Manage business change and stakeholder expectations with clarity and confidence. … reporting, MongoDB, data migration, reconciliation. Technical Architecture - Hands-on with C#/Java, microservices, containerization (Docker, OpenShift, Kubernetes), React, AWS, Terraform. Integration - Expertise in Real Time messaging (eg, AMQ), API design (JSON, Swagger), and batch processes. Infrastructure & Operations - DevOps practices, CI/CD pipelines, Git, Ansible, cloud elasticity, cost optimization, and grid computing. Delivery Approach: Deep familiarity with More ❯

and developments needed to support our participation in PharosAI, which will involve close collaboration with that project on a daily basis. In addition, the Lead Cloud Engineer will plan, design and organize customizations of the SDE for researchers and clinicians to support approved projects by working with teams of contractors. You will be continually evaluating the suitability and integrating … individual tasks from the team. Experience in developing and delivering technical training around the use of a data analysis environment to researchers and clinicians. Experience in leading architectural cloud design processes leading to the operation and delivery of large-scale complex cloud solutions (including public, private and hybrid platforms) through a team. Experience in interpreting complex policies, potentially from … for IT services, with a demonstratable record of communicating these within a team. Experience in using an agile methodology to deliver projects within an organization that uses a structured design methodology. Demonstrable scripting or programming skills (e.g., Python, BASH, Terraform, GitHub, etc.) Ability to use continuous integration and distribution pipelines (DevOps) to deploy applications using Infrastructure as Code model More ❯

About the Job:In this contract role, you will design, develop, deploy, and document secure and functional APIs that integrate Employment Hero's HR and Payroll modules with third-party client platforms (such as timesheet and finance systems). You'll work day-to-day with our clients and partners, acting as the technical expert who architects API solutions based on client requirements and Employment Hero's documentation. You will manage the full API lifecycle, liaise with third-party vendors, contribute to solution design workshops, and ensure the integration meets performance, security, anddocumentation standards. Your work will make a direct impact by enabling clients to use automated HR and Payroll processes efficiently. Responsibilities and Duties … API Solution Design & Development Architect and implement secure, scalable RESTful APIs to integrate Employment Hero with external platforms Implement OAuth 2.0 and token-based authentication for API access. Manage the API lifecycle including testing, deployment, version control, logging, and monitoring. Use Python (e.g. FastAPI) and Azure services (e.g. Azure Functions, Microsoft Fabric pipelines) for development and More ❯

About the Job: In this contract role, you will design, develop, deploy, and document secure and functional APIs that integrate Employment Hero's HR and Payroll modules with third-party client platforms (such as timesheet and finance systems). You'll work day-to-day with our clients and partners, acting as the technical expert who architects API solutions based on client requirements and Employment Hero's documentation. You will manage the full API lifecycle, liaise with third-party vendors, contribute to solution design workshops, and ensure the integration meets performance, security, and documentation standards. Your work will make a direct impact by enabling clients to use automated HR and Payroll processes efficiently. Responsibilities and … Duties: API Solution Design & Development Architect and implement secure, scalable RESTful APIs to integrate Employment Hero with external platforms Implement OAuth 2.0 and token-based authentication for API access. Manage the API lifecycle including testing, deployment, version control, logging, and monitoring. Use Python (e.g. FastAPI) and Azure services (e.g. Azure Functions, Microsoft Fabric pipelines) for development More ❯

to £520 per day via an approved umbrella company Job Overview We are seeking a highly experienced with strong expertise in MuleSoft, Apache Camel, and RabbitMQ to lead the design, development, and deployment of enterprise-grade integration solutions. The ideal candidate will have a solid grasp of event-driven architecture, enterprise integration patterns, and secure, scalable message-driven solutions … coupled with hands-on experience in DevOps and CI/CD. Key Responsibilities Architecture & Design Architect scalable, secure, and high-performance integration solutions using MuleSoft, Camel, and RabbitMQ. Define reusable patterns and integration frameworks based on EIP (Enterprise Integration Patterns). Lead API and messaging solution designs adhering to RESTful/SOAP standards and AMQP best practices. Design and implement event-driven architectures, pub-sub models, and asynchronous message flows. Development & Implementation Build and maintain Mule flows, subflows, and message processors using Anypoint Studio and Platform. Design complex DataWeave transformations and data enrichment pipelines. Configure and manage RabbitMQ clusters, exchanges, queues, bindings, and vhosts. Develop Apache Camel routes and leverage EIPs like WireTap, Enricher, Splitter/ More ❯

sectors. Key Responsibilities: Full stack developer with around 8-10 years development experience, working in a agile development team to deliver robust enterprise-wide solutions utilising industry standard practices Design, develop, enhance and maintain applications using agreed coding standards and quality targets. Ensure quality via code reviews and thorough unit testing. Liaise with immediate scrum team, other scrum/… Experience and expertise with the following technical stack Angular 13+ with DevExtreme UI library desirable Playwright, ReadyAPI and Specflow. Jira, Github, Confluenc Nice to have - C# and .NET6+ Rest API's and Microservice architecture SQL Server Database, NHibernate or Entity Framework Demonstrate expertise of: Building modern-web applications Modern UI design principles. i.e. Able to take initial design direction and interpret those guidelines to finalise the design through to a solution Restful API Design and development fundamentals Good SQL knowledge Test case preparation and execution EDUCATION & EXPERIENCE REQUIREMENTS 8-10 years' experience designing and developing applications both individually and as part of a team Familiarity with energy or financial trading environment Strong inter-personal More ❯

join a Business Banking Technology team within a leading Tier 1 financial institution. You'll play a key role in enhancing and scaling their digital banking platform. Key Responsibilities Design, build, and maintain robust, scalable applications using Java, Spring Boot, and Angular or React. Collaborate with cross-functional teams to deliver seamless end-to-end features, from user interfaces … Messaging: PostgreSQL, Oracle, MongoDB (optional) Kafka, Redis (for messaging and caching) Requirements Extensive experience in full-stack development with strong expertise in Java and Angular. Solid understanding of REST API design, microservices architecture, and cloud-native development. Hands-on experience with CI/CD pipelines, containerization, and infrastructure as code. Strong grasp of Agile methodologies and collaborative team More ❯

AI Agents Solution Architect - Future Talent (Q2/Q3 opportunities) for leading GSI in the software engineering market AI Solution Architect to design and implement AI-driven agent solutions for the online commerce space. Deep understanding of AI/ML models, cloud computing, and scalable system architecture. This role requires expertise in architecting intelligent agents, optimizing cloud-based deployments … and integrating AI services into enterprise applications. Key Responsibilities: Architect and design AI-powered agent solutions that integrate with enterprise systems and cloud platforms. Develop and optimize RESTful and GraphQL APIs to facilitate AI-driven interactions. Utilize AWS services (Lambda, S3, API Gateway, SageMaker, DynamoDB, ECS, etc.) to deploy scalable AI solutions. Implement Full Stack JavaScript (Node.js, React.js … Work closely with data scientists and ML engineers to integrate machine learning models into cloud-native applications. Ensure security, scalability, and reliability of AI agent solutions in production environments. Design event-driven and serverless architectures to enhance AI agent performance. Lead proof-of-concept (PoC) developments for AI-based automation and intelligent process optimization. Define best practices for AI More ❯

Architect joint solutions and conduct technical audits Build applications, prototypes, and POCs Create enablement content: code samples, documentation, tutorials Provide ongoing support including bug resolution and performance optimization Influence API design and contribute feedback to product roadmaps Requirements: BS/MS in Computer Science or equivalent work experience 5+ years in web, software, or mobile app development Proficiency More ❯

a key role in designing, building, and deploying high-assurance software systems. The work is varied, fast-paced, and requires close collaboration with technical teams and stakeholders. Key Responsibilities Design, develop, and deliver secure and scalable software solutions. Work in collaboration with stakeholders to understand requirements and deliver fit-for-purpose solutions. Operate within an Agile delivery environment, using … modern development practices including CI/CD pipelines. Ensure all software developed adheres to secure development principles. Essential Skills and Experience Strong experience in RESTful API design and development. Proficiency in the Spring Framework. Solid understanding of data modelling. Experience working in Agile delivery teams. Understanding of secure software engineering principles. This role offers the opportunity to contribute More ❯

a key role in designing, building, and deploying high-assurance software systems. The work is varied, fast-paced, and requires close collaboration with technical teams and stakeholders. Key Responsibilities Design, develop, and deliver secure and scalable software solutions. Work in collaboration with stakeholders to understand requirements and deliver fit-for-purpose solutions. Operate within an Agile delivery environment, using … modern development practices including CI/CD pipelines. Ensure all software developed adheres to secure development principles. Essential Skills and Experience Strong experience in RESTful API design and development. Proficiency in the Spring Framework. Solid understanding of data modelling. Experience working in Agile delivery teams. Understanding of secure software engineering principles. This role offers the opportunity to contribute More ❯

Authentication likely to be Azure B2C Develop a future-proofed content architecture that works with tomorrow's technology Role The Full Stack Developer will be responsible for the architecture, design, develop and deploy a secure, scalable, and maintainable website. Content to be provided by headless CMS with a suitable preview platform. Build CI/CD pipelines using Azure ADO … management, CI/CD pipelines, serverless architecture, Infrastructure as Code (IaC), containerisation, automated deployment strategies, microservices architecture, Azure AD, Azure B2C, cloud security, monitoring, and logging. Full stack architecture, design and development, modern web frameworks, API design, frontend and backend integration, performance optimisation, and accessibility standards. Lean and Agile methodology, automated testing, code review, technical documentation, security More ❯