13 of 13 Contract API Development Jobs in the UK

Senior Java Backend Developer - API & Microservices Modernisation Location: Telford - minimum 2 days per month onsite, remaining time remote Contract Length: 12 months Rate: £550 per day IR35: Inside IR35 Start Date: Candidates must be available to start w/c 4 January 2027 Client: Central Government The Role … Java-based RESTful APIs and microservices, with a strong focus on scalability, resilience, maintainability and integration with existing systems. Essential Skills Java - Strong backend development experience. Spring Boot - RESTful API and microservices development. Microservices Design - Experience designing scalable, resilient and loosely coupled microservices, including service-to-service communication. ...

building and enhancing modern applications, APIs, and cloud-native services, whilst mentoring developers and promoting engineering best practice. Key Responsibilities Lead the design and development of robust, scalable software solutions Drive technical decision-making and provide guidance to development teams Develop and maintain RESTful APIs and microservices Build … quality, automated testing, and CI/CD best practices Support deployment, containerisation, and platform optimisation activities Essential Skills & Experience Strong commercial experience with Node.js API development using REST and OpenAPI Web application development using HAPI Database expertise across PostgreSQL , MongoDB , and Redis Unit testing with Jest ...

indices is a strong plus, as this role may support tooling and data platforms used by commodities trading, research, or risk functions. Key Responsibilities Development * Design, develop, and maintain backend services in Python, including asynchronous task processing using Celery, Redis (as broker/result backend), Celery Beat (scheduled/… throughout the project lifecycle. Testing & Quality Assurance * Write and maintain unit, integration, and end-to-end tests for both backend (Python/Celery/API) and front-end (React) code. * Validate asynchronous task pipelines for correctness, idempotency, retry behavior, and failure handling. * Participate in code reviews, ensuring adherence ...

Contract Type: Contract The Opportunity We are looking for a talented IdAM Application Developer to join our growing team and support the development, deployment, and operation of critical Identity and Access Management (IdAM) and data processing solutions. This is an exciting opportunity to work across a modern technology stack … looking for candidates with experience in: Python development. JavaScript development. Linux administration experience, particularly Red Hat Enterprise Linux (RHEL) or CentOS. Application development and deployment in enterprise environments. Troubleshooting and supporting applications in production. Working collaboratively within Agile or DevOps teams. Strong analytical, problem-solving, and communication skills. Desirable ...

ready solutions including testing, CI/CD, logging and documentation. - Provide technical leadership and mentorship to a junior engineer. Essential Skills & Experience - MCP server development and AI agent tooling - Azure OpenAI, Azure AI Search, RAG and prompt engineering - SharePoint Online and Microsoft Graph API - Hybrid semantic/vector … search - Enterprise API development and document processing - Azure (Functions and/or Container Apps) - Entra ID and OAuth/OIDC- CI/CD, testing and production support - Software engineering experience, ideally using Python and/or C#/.NET Desirable Skills - Microsoft 365 Copilot - Microsoft Purview - Enterprise knowledge ...

delivering enterprise-scale integration solutions. The individual should have extensive hands-on experience with Azure Integration Services, including Logic Apps, Azure Functions, Service Bus, API Management, and REST APIs, alongside a deep understanding of integration patterns and system-to-system connectivity. Key skills required include: * Azure Integration Services (Logic … Apps, Functions, Service Bus, Event Grid, API Management) * Enterprise integration architecture and design * API development, management and integration * System-to-system integration across complex application estates * Azure-native solution design and implementation * DevOps and CI/CD pipelines for automated deployment and release management * Strong troubleshooting ...

working on multiple contract opportunities within leading financial services environments, spanning trading, risk and full-stack engineering. If you have extensive Python development experience and a background in high-performance trading or financial services environments, we'd love to hear from you. The opportunities We're looking for experienced … supporting trading workflows and financial markets. Risk Engineering: Building Back End services and distributed systems for risk data processing, analytics and reporting. Full-Stack Development: Building scalable applications across Back End services, APIs and Front End technologies. Financial Platforms: Improving business-critical systems, data processing pipelines and enterprise-grade ...

looking for an experienced Scala Developer to support critical government technology services and high-priority national infrastructure projects. Key skills required: Strong commercial Scala development experience Functional programming principles Microservices and API development Play Framework experience desirable Agile delivery and live service support If this Scala Developer ...

experienced Oracle E-Business Suite (EBS) Technical lead with expertise in supporting and enhancing Oracle EBS R12 environments. Responsible for technical design, development, system integrations, application architecture, production support, upgrade initiatives, and API enablement using Oracle Integrated SOA Gateway (ISG). Key Responsibilities Design, develop, test, and deploy … Collaborate with business and functional teams to translate requirements into scalable technical solutions. Develop and support interfaces, conversions, reports, and custom extensions using Oracle development technologies. Build, expose, and support REST and SOAP APIs using Oracle Integrated SOA Gateway (ISG) to enable secure integration between Oracle EBS and external ...

first, occasional travel if needed Clearance: Active SC required We're looking for a senior Backend Engineer to act as technical lead for backend development within a delivery pod, working for a UK national law enforcement agency through a global IT services provider. You'll own the design … event-driven, CQRS-based systems that underpin critical national services. What you'll do Lead backend development within your pod, setting technical direction and standards. Design and build event-driven services using CQRS and Event Sourcing patterns. Develop APIs and distributed services on Azure, using Azure Service ...

Back End services Maintain high code quality through testing, reviews and best practices Mentor junior developers where required Required Skills Strong Core Python development experience Experience with enterprise trading and risk platforms (eg Quartz, SecDB, Athena, Kanon, Beacon or similar) Strong SQL and large-scale data handling expertise Pandas … NumPy for data processing and analytics REST API development using Flask, FastAPI or Django Strong understanding of performance optimisation and scalable systems Unix/Linux and Shell Scripting experience Domain Experience Investment Banking or Capital Markets background Experience across Market Risk, CCR, PnL, Trade Lifecycle and Reconciliations Knowledge ...

consumers, topics, partitions and consumer groups Cloud: AWS application deployment and support DevOps: CI/CD pipeline implementation and automation Containers: Docker APIs: RESTful API design and development using C# with Open API standard Source Control: GitHub and Azure DevOps Production Engineering: Troubleshooting, monitoring, logging and performance … optimization Highly Desirable Amazon MSK or managed Kafka experience AWS EKS/ECS Terraform/AWS CloudFormation AWS Lambda, API Gateway, SQS, SNS and EventBridge Redis and distributed caching CloudWatch, ELK/OpenSearch, Datadog, Prometheus, Grafana or Splunk OAuth 2.0/JWT and API security AWS certification Experience ...

consumers, topics, partitions and consumer groups Cloud: AWS application deployment and support DevOps: CI/CD pipeline implementation and automation Containers: Docker APIs: RESTful API design and development using C# with Open API standard Source Control: GitHub and Azure DevOps Production Engineering: Troubleshooting, monitoring, logging and performance … optimization Highly Desirable Amazon MSK or managed Kafka experience AWS EKS/ECS Terraform/AWS CloudFormation AWS Lambda, API Gateway, SQS, SNS and EventBridge Redis and distributed caching CloudWatch, ELK/OpenSearch, Datadog, Prometheus, Grafana or Splunk OAuth 2.0/JWT and API security AWS certification Experience ...