1 to 25 of 46 Contract REST Jobs in London

Principal Engineer

Hiring Organisation
Hays
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£600.0 - £640.0 per day + up to £640 pd (Inside IR35)
fourth-generation programming language (4GL) Strong skills in object-oriented analysis and design (OOAD) Proven experience with C#, Java (Spring Boot, JPA/Hibernate), REST APIs, observability, monitoring, queue technologies, security, and relational databases (especially Postgres). Strong understanding of SOLID principles, microservice development focused on high availability and data ...

Azure AI Engineer

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £500 to £550 per day
automated document workflows. Implement RAG (Retrieval-Augmented Generation) architectures using Azure Search or vector databases. Integrate AI capabilities with enterprise systems through REST APIs, Azure Functions, Logic Apps, or Power Platform. Ensure adherence to security, data governance, and compliance standards, including data encryption, responsible AI, and regulated-industry guidelines. Develop ...

Mainframe Developer with CICS Webservices

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £350 to £400 per day
Requirement (if hybrid): 2 3 days a week Key Skills Required Mainframes CICS Webservices Required Skills Experience working in ZOS Connect EE and DB2 REST, with extensive knowledge in CICS webservices. Development experience using FileAid, Xpeditor, IBM Explorer for z/OS, and Visual Studio. Proficient with SOAP, WSDL ...

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 ...

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. ...

Prompt Engineer

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £500 to £550 per day
other security aspects of AI. Practical experience deploying LLM solutions on Azure (e.g., Azure OpenAI, Azure Functions, App Service, Key Vault). Proficiency with REST APIs and JSON; integrating LLM calls into applications/services using Python or C# (Node.js also acceptable). Working knowledge of embeddings, document chunking strategies ...

Application Security Engineer

Hiring Organisation
Atrium Global
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £550 to £650 per day
strengths and weaknesses of each At least one programming language (e.g. Java, Go) At least one major cloud provider (e.g. AWS, GCP, Azure) REST API design HTTP Authentication Linux at the terminal, including scripting and automation (e.g. shell, Python) Some other highly valued skills may include: Experience with CI/ ...

Azure Ai Architect

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £650 to £700 per day
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. Desirable skills/knowledge/experience Experience with vector databases (Cosmos DB with vector search, Redis Enterprise, or Pinecone) and semantic ...

Oracle Developer (local government)

Hiring Organisation
Morson Edge
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£450 - 500 per day
solving, communication, and stakeholder management skills. Desirable: Knowledge of payroll, HR, or finance processes within local government. Exposure to integration tools such as OIC, REST/SOAP APIs, or middleware platforms. InterQuest Group is acting as an employment agency for this vacancy. InterQuest Group is an equal opportunities employer ...

ServiceNow Solution Architect

Hiring Organisation
Randstad Digital
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£400 - £500 per day
High level (HLD) Experience with the following service now modules: ITSM, ITOM and CSM Proficient in connecting service now with external systems using IntegrationHUb, REST/SOAP and mid servers £400 to £500 a day | London Based - Hybrid working If the above seems of interest then please apply directly ...

Oracle Developer

Hiring Organisation
Invitise Ltd
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
Up to £650 per day
builds and enhancements to current workstreams. Essential experience: Strong development background Oracle Integration Cloud Oracle Fusion Cloud Integration work with SOAP, REST, JSON OIC, Postman, Curl Oracle VBCS ERP and HCM integrations via OIC OAUTH, IAM, JWT GIT, XML, JSON, XSLT Desirable: Public cloud and security knowledge DevOps background Experience … release processes Understanding of secure development practices Interested? Please apply below. Oracle Integration Cloud, OIC, Oracle Fusion, Oracle ERP, HCM, VBCS, OCI, Integrations, REST, SOAP, JSON, SC Cleared, Inside IR35. ...

Power Automate Specialist / Automation Engineer

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
From £400 to £425 per day
integrating with Dynamics 365 (CE/CRM) and Dataverse. Solid understanding of Azure services: Logic Apps, Functions, APIM, Event Grid, Service Bus. Proficiency with REST APIs, JSON, OAuth, and Microsoft Graph. Experience with Power Apps, Power BI, and Power Platform ALM is beneficial. Familiarity with RPA best practices and process ...

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 ...

Splunk Engineer/ITSI Developer

Hiring Organisation
Apsley Recruitment Limited
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 450 - 475 Daily
with Terraform & IaC Automate Splunk deployments and config management Manage AWS services (EC2, S3, VPC, IAM, CloudWatch, ELB) Develop Python scripts, AWS Lambda, and REST API integrations Build custom Splunk apps/add-ons and CI/CD pipelines Optimize Splunk performance, capacity, and search efficiency Troubleshoot ingestion/indexing … Terraform for infrastructure automation and management Python programming skills with experience in various libraries Experience with AWS Lambda functions and serverless architectures Knowledge of REST APIs, JSON/XML, and web services integration Familiarity With Cribl, Grafana, Logic Monitor, Datadog, Newrelic or comparable monitoring & APM solutions is a plus. Exposure ...

Angular Developer

Hiring Organisation
e2e Infosys
Location
Newham, Greater London, Stratford, United Kingdom
Employment Type
Contract
Contract Rate
£450 - £500/day
applications Proven experience in performance optimisation and code improvement Solid knowledge of RxJS, Lazy Loading, Angular CLI Experience with State Management, Dependency Injection & REST API integration Strong skills in TypeScript, JavaScript, HTML5, CSS3, SCSS Familiar with modern UI design techniques & design systems Unit testing experience with Jasmine & Karma ...

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 ...

ServiceNow Architect

Hiring Organisation
Infoplus Technologies UK Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
thought leader. Key Responsibilities Lead the architecture, configuration, and deployment of ServiceNow Event Management, integrating with tools like SolarWinds, Splunk, AppDynamics using SNMP traps, REST/SOAP APIs, webhooks, and MID Server. Develop event rules, alert correlation, deduplication, suppression, and maintain operational intelligence signals. Design and tune service health dashboards … solutions; specifically in ITOM/Event Management architecture. Proficient in designing event rules, alert correlation, deduplication, and suppression. Skilled in integration via SNMP traps, REST/SOAP, MID Server, webhooks. Strong JavaScript/Glide API experience for custom logic and alert action adjustments. Expertise in CMDB and CSDM, including horizontal ...

Guidewire CC Developer- 6months- London

Hiring Organisation
Kirtana Consulting
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
Guidewire Data Model Customization & Integration: o Sound knowledge of Guidewire xCenters (version 10.x & Cloud) customization and integration (Intra and Inter system integration) using REST and SOAP APIs Technical Skills: o Experience with batch processes, Guidewire Messaging framework, and OOTB plugins o Familiarity with Infra concepts and deployment architecture ...

Mainframe Modernization - IBM DataPower Engineer

Hiring Organisation
DCV Technologies Limited
Location
City of London, London, United Kingdom
Employment Type
Contract
designing and implementing secure, high-performance integration solutions using IBM DataPower Gateway to expose mainframe services (CICS, IMS, DB2, MQ) as modern APIs (REST/JSON, SOAP). Enable legacy-to-digital transformation by bridging z/OS applications with API platforms and cloud. Your responsibilities: (Up to 10, Avoid … mTLS, and AAA policies for secure API access. Integrate with CICS, IBM MQ, and DB2 for backend connectivity. Connect to database like PostgreSQL via REST/HTTP Services Via JDBC through Integration Layer, MQ or Kafka Bridge. Perform XSLT/GatewayScript transformations and schema validations. Automate deployments via SOMA/ ...

SharePoint Developer (SC Clearance Required)

Hiring Organisation
Cpl Life Sciences
Location
Stratford, London, England, United Kingdom
Employment Type
Contractor
Contract Rate
£350 - £450 per day
policies, auto-classification, and disposition workflows. Integrate SharePoint with Microsoft 365 services (Teams, Viva, Outlook, OneDrive). Develop integrations using Microsoft Graph API, SharePoint REST APIs, and Azure services. Support content governance, permissions, architecture, and compliance best practices. Collaborate with business stakeholders to gather requirements and deliver high-quality solutions. … Automate. Knowledge of Microsoft Purview Records Management (retention labels, retention schedules, disposition review,, Sensitivity Labels, etc.). Experience with Microsoft Graph APIs and SharePoint REST API. Familiarity with PnPjs, PnP PowerShell, CLI for Microsoft 365. Understanding of authentication models (OAuth 2.0, Azure AD app registrations). Exposure to services like ...

Back End Developer

Hiring Organisation
Experis
Location
South Croydon, London, United Kingdom
Employment Type
Contract
Contract Rate
£550.00 - £575.00 per day
Framework , including Spring Boot and Spring Data Experience with Kafka and event-driven systems PostgreSQL database experience OpenSearch/Elasticsearch Node.js Building and consuming REST APIs WireMock or similar API mocking tools Active SC Clearance Nice-to-Have Experience working in large, complex or regulated environments Familiarity with cloud-based ...

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 ...

Oracle Cloud Integrations Specialist

Hiring Organisation
ARM
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£650/day Inside IR35
Once a month max. £650 per day (Inside IR35) Key Essential Skills Oracle integration cloud experience Variety of integration that they have done using rest API. AMS Confidential Set of deliverables given, they can work with this and crack on. Oracle VBCS The Role requires in-depth Knowledge OCI (Oracle … Good Oracle Integration Cloud (OIC) Experience Good Oracle Fusion Cloud Experience Hands-on with development & unit testing of integration components & web services (SOAP/REST/JSON Payload) using OIC, Postman, Curl Oracle VBCS to develop custom elements of the service Strong experience of system interfaces (predominantly on a PaaS ...

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
Solos Consultants Ltd
Location
South West London, London, United Kingdom
Employment Type
Contract
Contract Rate
£650 per day
Oracle Visual Builder Cloud Service (VBCS) Integrate Oracle Fusion Cloud applications (ERP and HCM) with other enterprise systems Develop and unit test integrations using REST, SOAP, and JSON payloads Produce and maintain integration design documentation and release notes Work with predefined statements of work and deliver agreed technical outcomes Collaborate … Integration Cloud (OIC) Experience developing custom applications using Oracle VBCS Strong experience integrating Oracle Fusion Cloud (ERP and/or HCM) Proven experience with REST and SOAP web services Experience working with OAuth, IAM, and JWT security technologies Strong understanding of systems integration best practices and architectural patterns Experience with ...