1 to 25 of 48 Contract REST Jobs in London

Backend Developer (Azure)

Hiring Organisation
Amtis Professional Ltd
Location
London, Euston, United Kingdom
Employment Type
Contract
Contract Rate
£425 - £475/day OUTSIDE IR35
within a mature production database. Work on event-driven integrations using Azure Service Bus , including message ingestion, transformation and error handling. Design and consume REST APIs through Azure API Management . Write meaningful automated unit and integration tests as part of the development lifecycle. Own CI/CD pipelines ...

C# Developer

Hiring Organisation
CEI England Limited T/A CEI GB
Location
Isleworth, London, United Kingdom
Employment Type
Contract
Contract Rate
£380 per day
Java and/or C# (experience in both is highly desirable). Strong frontend development experience with ReactJS . Proven experience building and supporting REST APIs and microservices . Experience working with relational and NoSQL databases, particularly Oracle and Couchbase . Experience with messaging and event-driven technologies such ...

AI Engineer

Hiring Organisation
DCV Technologies
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £650/day
/Azure OpenAI Anthropic Claude APIs Agentic AI LangChain LangGraph CrewAI Software Engineering Strong development experience with Python, JavaScript/TypeScript, C# or Java REST APIs and microservices Software architecture and engineering best practices Desirable Skills Experience with any of the following would be advantageous but not essential : Azure ...

Dynamics 365 CE Developer

Hiring Organisation
Amtis Professional Ltd
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£400 - 500 per day
HTML and CSS Web APIs and integration services Azure Functions Azure Logic Apps Azure Service Bus Azure API Management Azure DevOps Git source control REST APIs and integration patterns Secure application development Unit testing frameworks SOLID principles and software design patterns Desirable Experience Healthcare or NHS environments Azure Health Data ...

API / Integration Developer (SC Cleared)

Hiring Organisation
ARM
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550/day Inside IR35
software development principles. Strong problem-solving and troubleshooting skills. Ability to work effectively within a collaborative Agile environment. Desirable Experience with Python . REST/SOAP APIs. Microservices and cloud-native development. Azure integration services. CI/CD and DevOps practices. Experience integrating legacy and modern systems. Experience working within ...

Software Engineer (SAR)

Hiring Organisation
Stott & May Professional Search Limited
Location
London, United Kingdom
Employment Type
Contract
/CD pipelines and frequent code integration. - Maintain accurate documentation and work tracking within Azure DevOps. Required Skills - Node.js & TypeScript - React & Express.js - REST APIs - Docker - Azure App Services & Azure Functions - Azure DevOps (Repos, Boards & Pipelines) - Azure Kubernetes Service (AKS) - Azure Container Registry - Cosmos DB - Kubernetes & Helm - Elasticsearch & Kibana - Infrastructure ...

Angular Developer, Hybrid

Hiring Organisation
Sanderson Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£300 - £350 per day + Hybrid
using Angular and .NET technologies. Key Skills Required Strong commercial experience with Angular Good knowledge of TypeScript, JavaScript, HTML and CSS Experience integrating with REST APIs Solid .NET/ASP.NET Core experience Experience with automated testing tools such as Playwright, Vitest, Cypress or Jest Experience using Claude Code or similar ...

Senior Java Architect - Payments

Hiring Organisation
Sanderson Recruitment
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £600 per day
knowledge of microservices architecture and distributed systems Experience designing event-driven solutions using Kafka or similar messaging technologies Strong understanding of API-first architecture, REST services, and enterprise integration patterns Experience working with cloud-native platforms and containerised environments Exposure to AWS, Azure, Kubernetes, Docker, and CI/CD pipelines ...

DevOps Engineer - SC Clear

Hiring Organisation
Hays Technology
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550/day £550 per day via UMB
SageMaker Python scripting and automation Container orchestration platforms Infrastructure security and hardening Cloud networking and connectivity Application Support Knowledge C# .NET JavaScript React REST APIs Microservices architecture COTS Product Experience Supporting Commercial Off-The-Shelf products within secure environments Troubleshooting intelligence, analytical or partner-provided systems Exposure to SOLAR ...

Automation Application Developer

Hiring Organisation
ARM
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £440/day
standards. Application Development & Integration Develop supporting applications, utilities and services using C#/.NET. Build and maintain integrations with internal and external platforms using REST APIs, web services and message-based interfaces. Design and develop SQL-based data processing, reporting and automation capabilities. Work with SQL Server and Oracle databases ...

Python Developer

Hiring Organisation
Synergize Consulting Limited
Location
South West London, London, United Kingdom
Employment Type
Contract
experience AWS Cloud Experience working with AWS services and AWS SDKs, particularly Python/boto3. Experience with Kubernetes, GIT, CI/CD Experience developing REST APIs, backend services or automation tooling Experience with HashiCorp Vault Experience with LDAP/Active Directory Experience working on large-scale public-sector technology programmes ...

Full Stack Java Developer

Hiring Organisation
McGregor Boyall Associates Limited
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£475 - £500 per day + PAYE holiday
accelerate development Contribute to continuous improvement and engineering best practice What we're looking for Strong commercial Java development experience Spring Boot and REST API development Object Oriented Design and Design Patterns SQL and relational database experience Angular, TypeScript, HTML and CSS (desirable) JUnit, BDD or automated testing frameworks Linux ...

Technical Architect

Hiring Organisation
CBSbutler Holdings Limited trading as CBSbutler
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £800/day
Node.js Strong hands-on TypeScript and Node.js development Ability to read, debug, review and write production-quality TypeScript API, integration service and serverless development REST API and third-party SaaS integrations Commercetools SDK experience highly desirable Microsoft Azure Strong experience supporting cloud-native applications on Azure Hands-on Azure Functions ...

Senior Developer

Hiring Organisation
SR2 - Socially Responsible Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 650 - 750 Daily
delivering software in MOD, Defence Intelligence, National Security or comparable secure environments Proven experience leading agile development teams Strong engineering background across Python, FastAPI, REST APIs, React and TypeScript Experience designing and delivering microservice architectures ...

FullStack Developer

Hiring Organisation
DNS Info Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £450/day
strong expertise in Python and React.js to design, develop, and maintain scalable web applications. The ideal candidate should have hands-on experience building microservices, REST APIs, cloud-native applications, and modern frontend solutions. Key Responsibilities Design, develop, and maintain web applications using Python and React. Build scalable RESTful APIs … within Agile/Scrum development environments. Troubleshoot and resolve production issues. Required Skills Backend Strong experience with Python Experience with FastAPI , Flask , or Django REST API and Microservices development Object-Oriented Programming (OOP) SQL and database design Frontend Strong knowledge of React.js JavaScript (ES6+), TypeScript HTML5, CSS3 Redux, React Hooks ...

Contract Principal Software Architect

Hiring Organisation
Spectrum IT Recruitment
Location
Uxbridge, London, United Kingdom
Employment Type
Contract
platforms incrementally, including working with legacy systems and technical debt. Technical Environment .NET/C# Microsoft Azure Python Node Distributed and service-based architectures REST APIs and integrations SQL and NoSQL data technologies Cloud infrastructure and platform services Modern DevOps and CI/CD practices GitHub Jira Confluence What ...

SAP Technical Architect - 12 Month Contract - Hybrid Manchester/London, 4 days onsite

Hiring Organisation
Hamilton Barnes
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
integration patterns across SAP and non-SAP systems (CRM, eCommerce, SCM, WMS, POS, Finance) using BTP Integration Suite (CPI), PI/PO, APIs (REST/SOAP/OData), IDocs, RFCs, and event-driven architectures What You Will Ideally Bring Strong hands-on experience designing and governing SAP S/4HANA ...

Python Developer

Hiring Organisation
NEEV LIMITED
Location
London, United Kingdom
Employment Type
Contract
security of backend systems. Databricks & Data Engineering Develop ETL pipelines and workflows using PySpark on Databricks. Work with Delta Lake, Unity Catalog, and Databricks REST APIs. Optimize queries and pipelines for cost efficiency in cloud environments (Azure/AWS). SQL Database Management Write and optimize complex SQL queries. Manage ...

SAP Technical Architect

Hiring Organisation
Project Recruit
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
database architecture, optimization, backup/restore strategies, and security. Expertise in SAP integration technologies: SAP BTP Integration Suite (CPI) SAP PI/PO APIs (REST, SOAP, OData) IDocs, RFCs, Event-driven architectures Ability to design end-to-end integration patterns across SAP and non-SAP systems (CRM, eCommerce ...

Lead Software Engineer / Technical Lead (Python & Django)

Hiring Organisation
NonStop Consulting
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£650 - £720/day
improvement (Technical Leads) Mentor developers and provide technical leadership across squads Essential Skills Strong commercial experience with Python Excellent hands-on experience with Django REST API development System design and software architecture experience Agile delivery experience Test-Driven Development (TDD) Cloud platform experience (AWS, Azure or GCP) Excellent communication ...

Guidewire Architect - London (hybrid) - Inside IR35

Hiring Organisation
iBSC
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
/or BillingCenter. Strong P&C/General Insurance experience across policy, underwriting, claims and/or billing. Strong integration architecture experience with REST/SOAP APIs, messaging and microservices. Experience with Guidewire Cloud, Azure and/or AWS . Knowledge of Agile, DevSecOps and CI/CD environments. Strong ...

AI Expert

Hiring Organisation
DCV Technologies
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £650/day - Inside IR35
testing, deployment, training, and documentation. Expertise in building responsive and scalable web applications using React, Next.js, Tailwind CSS, and ShadCN UI. Strong knowledge of REST APIs, GraphQL, API integrations, authentication, and serverless architectures. Experience integrating OpenAI, Azure OpenAI, Copilot Studio, LangChain, and AI Agent frameworks. Good understanding of RAG, vector ...

AWS Connect Developer - contract

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Contract
development/integration experience. Strong hands-on Amazon Connect development experience. Strong Contact Flow experience. Experience with AWS Lambda and AWS APIs. Experience with REST/API integrations. Experience with Amazon Connect Cases. Experience with Amazon Connect Tasks. Experience integrating Amazon Connect with external systems. Experience troubleshooting production contact-centre ...

Boomi Developer - Integration Engineer

Hiring Organisation
Krubera Group
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
Boomi AtomSphere. Previous or active SC (Security Check) Clearance. Experience with Boomi API Management, including the design and management of APIs. Strong knowledge of REST/SOAP APIs, JSON/XML, and SQL databases. Experience with Groovy and/or JavaScript, as well as integration patterns, troubleshooting and enterprise integration ...

Microsoft Power Platform CoPilot Architect

Hiring Organisation
Ixceed Solutions Ltd
Location
London, United Kingdom
Employment Type
Contract
calculated columns Apply ALM practices using ADOGitHub including solution packaging deployments Integrations Connectors Use custom connectors and Power Platform connectors to integrate backend systems REST APIs Azure Functions Dataverse Third party services SAP ServiceNow Salesforce etc Ensure secure authentication OAuth2Azure AD throttling management and robust exception handling Prompt Engineering ...