1 to 25 of 40 Contract REST Jobs in London

Software Engineer Java/Full Stack Contract-to-Perm London

Hiring Organisation
LMA Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £550 per day
Excellence: Promote code quality, security best practices, and knowledge sharing within internal tech communities. Technical Requirements Backend: Strong proficiency in Java 17+ , Spring Boot, REST APIs, and Microservices. Frontend: Experience with Angular (with an interest in React/TypeScript for future workstreams). Data: Solid SQL skills (PostgreSQL, MSSQL ...

Software Developer

Hiring Organisation
JAM Recruitment Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 595 Daily
proud of. What You'll Do Design, develop, and deliver high-quality software solutions in Java, React, PostGres, Kafka, ElasticSearch, AWS, Ansible, REST, Docker, API Gateways, JavaScript, Mongo, and SQL. Work hands-on across the full stack while ensuring delivery pipelines, NFRs, and industry best practices are met. Collaborate with ...

Software Developer

Hiring Organisation
JAM Recruitment Ltd
Location
South East London, London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £595 per day + Umbrella, inside IR35
proud of. What You'll Do Design, develop, and deliver high-quality software solutions in Java, React, PostGres, Kafka, ElasticSearch, AWS, Ansible, REST, Docker, API Gateways, JavaScript, Mongo, and SQL. Work hands-on across the full stack while ensuring delivery pipelines, NFRs, and industry best practices are met. Collaborate with ...

Developer (MS) (18 Months FTC)

Hiring Organisation
London Borough of Barnet
Location
Barnet, London, United Kingdom
Employment Type
Contract
Contract Rate
£56376 - £61653/annum
sources. - Knowledge of core development languages such as PowerShell, JavaScript, C#, Python or similar. - Experience working with data sources including MS SQL, Dataverse, APIs, REST services, JSON/XML and other integration methods. - Strong problemsolving skills and the ability to identify creative solutions to longstanding challenges. - Excellent communication skills, with ...

RPG Developer, Contract & Perm

Hiring Organisation
Hydrogen Group
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
experience with: ILE RPGRPG IV (free-form)CLSQLDeep understanding of IBM i environment structures, library management, and system utilitiesExperience developing and consuming SOAP/REST web services using Integrated Web Services (IWS)Strong knowledge of DB2 for i and advanced SQL techniquesDevOps & Tooling ExperienceHands-on experience with source control systems ...

Senior Full Stack Engineer

Hiring Organisation
Station Group International Limited
Location
West London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £450 to £500 per day
designing, building and maintaining scalable web applications using: .NET 6+/.NET Core (C#) Angular (modern versions) Azure PaaS (App Services, Functions, SQL, EntraID) REST APIs Azure DevOps CI/CD pipelines Youll be involved across the full lifecycle from technical design through to delivery working within an Agile team ...

PEGA Developer

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £450 to £500 per day
exception handling. Sound knowledge of Pega architecture and rule resolution, including class structure, rulesets, circumstancing, inheritance, and performance tuning. Experience in building integrations using REST/SOAP services, JSON/XML, and handling real-time and batch data exchanges with upstream/downstream systems. Strong understanding of data modelling ...

Lead React Native Engineer / Engineering manager

Hiring Organisation
Sanderson Recruitment
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £700 per day + Outside IR35
/Web and Mobile architecture approaches and design patterns including micro front ends, module federation, stateless, SPA and others Strong API/integration experience: REST/GraphQL, auth flows, contract design and resilience patterns Well versed in latest CI/CD practises and tools, deployment methodologies and experienced in tools ...

Director of Quality Engineering

Hiring Organisation
Infoplus Technologies UK Ltd
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £650 to £700 per day
Technical Expertise (Exceptional Level) 2025+ years in QE engineering, transformation, and automation leadership. Mastery of: o Playwright, Appium, Selenium, Cypress, Java o API Automation (REST Assured, Karate, Postman) o Performance (JMeter, LoadRunner) o Cloud native testing (Azure, AWS, GCP) o Test orchestration, CI/CD pipelines o TDM, environment strategy ...

Oracle FDI Reporting Lead - SC Cleared

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
environments. Hands-on experience with FDI implementation or support, including knowledge of FDI data structures. Experience building advanced BIP and OTBI reports. Experience with REST/SOAP Web Services. Experience supporting FDI in public sector environments. Guidant, Carbon60, Lorien & SRG - The Impellam Group Portfolio are acting as an Employment Business ...

Azure AI Architect

Hiring Organisation
Infoplus Technologies UK Ltd
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
controls) and completing architecture risk assessments. Proficiency in Python and/or C# for service integration, evaluation tooling, and adapters; solid understanding of REST APIs, JSON, and async patterns. Mode of working: Hybrid(3 days) Work locations: London, Tunbridge wells, Ipswich, Bolton ...

Software Test Automation Engineer

Hiring Organisation
GlobalTech Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
/CD integration for automated tests (Azure DevOps, GitHub Actions, Jenkins). Script creation, maintenance, and optimisation. API Testing Using tools like Postman, REST Assured, SoapUI. Validating response codes, payloads, headers, auth flows (OAuth2, tokens). Test Planning & Execution Test planning, strategic development & scope management Translating functional and non-functional ...

Software Test Automation Engineer

Hiring Organisation
GlobalTech Recruitment
Location
SW1A, Westminster Abbey, Greater London, United Kingdom
Employment Type
Contract, Temporary
/CD integration for automated tests (Azure DevOps, GitHub Actions, Jenkins). Script creation, maintenance, and optimisation. API Testing Using tools like Postman, REST Assured, SoapUI. Validating response codes, payloads, headers, auth flows (OAuth2, tokens). Test Planning & Execution Test planning, strategic development & scope management Translating functional and non-functional ...

Contract Threat Detection Engineer

Hiring Organisation
Dynamic Search Solutions Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £500 per day
automations Good understanding of common attack techniques, TTPs, and frameworks such as MITRE ATT&CK Scripting or automation capability (e.g., Python, PowerShell, JSON, REST APIs) Strong analytical and problem-solving skills with a methodical approach to engineering delivery Experience working in a SOC or MSSP environment Familiarity with EDR/ ...

Backend Engineer

Hiring Organisation
Skilliantech Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
Role: Backend Engineer (ATA) Location: United Kingdom (Remote work) Skills: Java, AWS, Spring Boot, REST APIs,MySQL Job Summary: We are looking for a Backend Engineer to join the Core Portal team and build scalable backend services for an enterprise discovery application click apply for full job details ...

Python Developer

Hiring Organisation
Parkside Office Professional
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£400 - £425 per day
Manipulate and analyse large datasets using pandas and numpy Build interactive dashboards using Plotly Dash Design modular, reusable and well-tested code Integrate with REST APIs and backend services Collaborate with commercial and technical stakeholders to translate requirements into scalable solutions This is a highly technical role suited to someone ...

SAP OTC Architect

Hiring Organisation
Eteam Workforce Limited
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
From £580 to £625 per day
Create reusable templates, documentation, and functional playbooks. Tools & Technologies SAP S/4HANA SD, SAP ECC SD IDoc/BAPI/OData/SOAP REST APIs Jira/ALM/Azure DevOps/ServiceNow SAP Fiori for SD& Sales Analytics EDI/3PL logistics interface integrations ...

SharePoint Developer / C# Developer

Hiring Organisation
MS Talent Ltd
Location
West London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£400 - £425 per day
Strong C#/.NET backend development Experience with React Experience with Azure technologies (Azure AI/Azure Foundry desirable) Experience integrating with MCP servers , REST APIs and Microsoft Graph API Strong SharePoint development knowledge (architecture, APIs, structure) Modern authentication experience (OAuth, Entra ID) Comfortable working in Agile, sprint-based teams. ...

Senior Analyst

Hiring Organisation
Salt Search
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£47,000 - £56,000 per annum
across projects and operational work Ensure secure, stable and scalable services across the learning systems landscape Technical environment Moodle VLE PHP JavaScript CSS NodeJS REST APIs Linux environments Integration with other enterprise systems Learning technology platforms such as lecture capture tools What they are looking for Strong Moodle development experience ...

Technical Architect

Hiring Organisation
Sanderson Government and Defence
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550 per day + Inside IR35
conversations across teams, within the organisation, and with third parties Solution Design: Experience translating requirements into technical solutions Integration Expertise: Hands-on experience with REST APIs, microservices, and integration patterns Communication: Excellent written and verbal communication skills with ability to engage diverse stakeholders Collaboration: Proven ability to work effectively ...

Front-End Engineer React / TypeScript

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£0 per annum
quality: performance profiling, code-splitting, hydration, SSR/ISR (Next.js). Responsibilities Deliver modular, well-tested SPA components/pages. Integrate with backend APIs (REST/GraphQL), auth flows (OAuth2/OIDC). Collaborate with designers and back-end/AI teams on end-to-end features. Ensure accessibility, performance ...

Oracle Cloud Integrations Specialist

Hiring Organisation
GTC RECRUITMENT LIMITED
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£650 per day
DeliverandenhanceintegrationsandcustomcomponentsusingOracleIntegrationCloud. Workthroughthefulldevelopmentlifecycletointegratenewfunctionalitywithexistingsystems. Maintainandbuildontopreviouslydeliveredintegrationworkstreams. TakeassignedSOWs/tasksandworkindependentlytodeliverhigh-qualityoutputs. Develop,validate,andreviewphysicalintegrationdesignsandproducerelatedtechnicaldocumentation. DeployVBCSapplicationsintodevandtestenvironmentsusingSECDEVOPSpractices. Workcollaborativelywithinamultidisciplinarytechnicalteam. MandatorySkills&Experience 3+yearsdevelopmentexperience. 2+yearsOracleIntegrationCloud(OIC)experience. 2+yearsOracleFusionCloudexperience. Hands-ondevelopmentandunittestingofintegrationcomponents&webservices(SOAP/REST/JSON),usingOIC,PostmanandCurl. ExperiencedevelopingcustomelementsusingOracleVBCS. 3+yearsexperienceworkingwithsysteminterfaces,particularlyPaaScloudintegrations. Strongcommunicationandteamworkskills. ExperienceintegratingOracleERPandHCMviaOIC. KnowledgeofOAUTH,IAM,JWTtechnologies. ExperiencewithGIT,XML,JSON,XSLT,SOAPUI,Postman,Curl. Strongunderstandingofsystemsintegrationbestpracticesandarchitecturalpatterns. Excellentwrittenandverbalcommunicationskills. DesirableSkills Knowledgeofpubliccloud(IaaS)technologiesincludingsecurityandIAMcontrols. ...

Nokia SDN Engineer

Hiring Organisation
Flint UK Technology Services
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
experience in network engineering or SDN environments . Strong knowledge of: IP/MPLS networking Routing protocols (BGP, OSPF, IS-IS) SDN architectures REST APIs and automation Experience with network virtualization and cloud networking . Familiarity with Linux environments and Scripting (Python, Ansible) . ...

Senior SAP Functional Consultant

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
From £400 to £450 per day
integration across MM, PS, PM/CS, BP, FI/CO, and external systems Manage and support integrations using IDoc, SAP Proxy, and API (REST/SOAP) Lead functional design, UAT, cutover, go live, and post go live support Collaborate with ABAP and integration teams on RICEFW and interface development ...

Integration Business Analyst

Hiring Organisation
VIQU IT
Location
London, Candlewick, United Kingdom
Employment Type
Contract
Contract Rate
£450 - £550/day
Analyst: Strong experience as an Integration Business Analyst Strong experience working in the Financial sector Experience with integration architectures Proven experience working with APIs (REST, JSON, synchronous/asynchronous patterns) Strong understanding of Cards platforms and Cards domain concepts Ability to produce clear, technically detailed HLD and LLD documentation Experience ...