1 to 25 of 42 Contract REST Jobs in London

Software Engineer - Visual Quality

Hiring Organisation
MicroTECH Global Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
Strong experience in Python, developing high-performance, multithreaded applications, ideally with Flask, SQL, and databases. Proficient in Linux development environments. Hands-on experience with REST, HTTP, JSON, and Docker. Comfortable in Agile environments, using Scrum or Kanban and tools such as Jira. Familiarity with CI/CD processes, including source ...

DevOps Engineers - SC Cleared

Hiring Organisation
Experis
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £475/day
Docker, Kubernetes, Helm Frontend: Typescript/JavaScript Databases: Postgres Search: OpenSearch/ElasticSearch Testing: Playwright, Wiremock Monitoring: Grafana, Prometheus, Dynatrace Version Control: Git APIs: REST API Remote-first with minimal travel High-profile project Immediate start Interested? Send your CV today - deadline is Monday 15th . DM me or email ...

SC Cleared QA SDET

Hiring Organisation
ARM
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £540/day Inside IR35
passion for quality. Preferred Qualifications Salesforce certifications (e.g., Salesforce Administrator, Platform App Builder) are a plus. Experience with API testing tools (Postman, REST Assured) is desirable. Understanding of enterprise-level integration testing. Disclaimer: This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited ...

Senior Java Engineer Smart Contract

Hiring Organisation
Adecco
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
financial services , Ideally Commercial Lons. Experience in developing and deploying microservices architectures using Spring Boot, Spring Batch, and Spring Data In-depth knowledge of REST API principles and HTTP protocols. Proficiency in Git, CI/CD, and Agile methodologies. Familiarity with JIRA, JUnit, and Apache Kafka is preferred. Experience with ...

Senior Golang/Java Security Engineer

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£600 - £650 per day
software vulnerability types SAST, SCA, and DAST, including the strengths and weaknesses of each 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 ...

SC Cleared ServiceNow Developer

Hiring Organisation
ESynergy Solutions Limited
Location
South West London, London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £550 per day
Flow Designer, Business Rules, Client Scripts, and UI Policies Solid understanding of ServiceNow best practices and platform architecture Experience integrating ServiceNow with external systems (REST/SOAP APIs) Familiarity with Agile delivery in secure or regulated environments Ability to work independently in high-compliance government projects Excellent problem-solving ...

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/ ...

AppSec Engineer / Application Security Engineer

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£550 - £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/ ...

Front End Developer

Hiring Organisation
Experis
Location
Croydon, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £520/day
Proficiency in TypeScript and JavaScript for browser-based applications Solid understanding of modern front-end development practices (ES6+, component-based architecture) Experience working with REST APIs and asynchronous data handling Familiarity with Git and collaborative development workflows Nice to Have Experience with Playwright for front ...

Head of Mobile Engineering & Architecture - React & AWS

Hiring Organisation
Sanderson Recruitment
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £900 per day + Outside IR35
module federation, stateless, SPA and others Advanced knowledge of React and React Native Eco system and AWS technology stack. 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 ...

Head of Mobile Engineering & Architecture - React & AWS

Hiring Organisation
Sanderson
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£700 - £900 per day
module federation, stateless, SPA and others Advanced knowledge of React and React Native Eco system and AWS technology stack. 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 ...

Python Developer

Hiring Organisation
Hirexa Solutions UK
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£350 - £400 per day
with Plotly Graph Objects for advanced interactivity. ii. Creating dashboards with Dash: Callbacks, Layouts (HTML & CSS integration), Components (Dropdowns, sliders, graphs, tables). iii. REST APIs: Fetching or sending data to backend services ...

C# Developer - Risk IT

Hiring Organisation
Harvey Nash
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £720 per day
inside iR35* What You'll Be Doing Designing and developing enterprise-grade solutions in an Agile team. Building and maintaining middleware services using C# , REST APIs , FIX messaging , XML , and Microservices . Leading architecture discussions, code reviews, and release management. Collaborating with users and cross-functional teams to define ...

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 ...

Python Software Engineer

Hiring Organisation
Yoh, A Day & Zimmermann Company
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£40.00 - £50.00 per hour
next-generation video codec technology. Initial 3-month contract. Key Requirements (selective) Strong Python development skills (multithreaded, production code) Linux development experience Familiarity with REST/HTTP/JSON tooling and containers (e.g., Docker) Experience in test frameworks, automation, or media/codec workflows beneficial Contract Details Duration: 3 months ...

Tech Lead/Architect

Hiring Organisation
Adroit People Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 per day
applications, custom objects, and data models Strong understanding of BMC AR System architecture, workflow customization, forms, filters, escalations, and APIs Hands-on experience with REST/SOAP integrations, webhooks, and building robust data interfaces with telecom IT systems Collaborate with BA, SA, and business stakeholders to ensure the technical solution ...

Oracle Cloud Integration Specialist - SC

Hiring Organisation
Aspect Resources
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 600 - 650 Daily
Oracle Integration Cloud (OIC) 2 years 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 3+ years' experience of system interfaces (predominantly on a PaaS ...

Solution Architect - Limits Management

Hiring Organisation
Sanderson Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £650 per day
interface specifications. Data & Integration Expertise Deep experience with enterprise data models for credit, counterparty, and exposure reporting. Strong understanding of integration design patterns (REST APIs, message queues, event-driven integration, ETL, batch processing). Experience working with master data domains (Party, Facility, Instrument, Product, Country, Sector, Ratings). Technology & Platform ...

Oracle Cloud Integrations Specialist

Hiring Organisation
SUMMER-BROWNING ASSOCIATES LIMITED
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
Up to £0.00 per day + Excellent Day Rates
experience connecting Oracle ERP and HCM through Oracle Integration Cloud Expert skills in developing and unit testing integration components and web services (SOAP/REST/JSON Payload) using OIC, Postman, and Curl Solid experience with PaaS Cloud system interfaces To apply, please submit your latest CV for review. ...

Senior ServiceNow Developer

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£700 - £750 per day
with ServiceNow platform development, including scripting, configuration, and implementation across ITSM, ITOM, CMDB, and Discovery modules. Strong experience integrating ServiceNow with enterprise systems using REST/SOAP APIs, and IntegrationHub. Good experience mentoring junior developers. Exposure and achievements in greenfield implementations. Experience within financial markets - preferred. What ...

ServiceNow Developer (contract)

Hiring Organisation
Nelson Frank
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £900/day
environment Strong hands-on experience with JavaScript and ServiceNow scripting Experience with one or more ServiceNow modules (e.g. ITSM, ITOM, HRSD, CSM) Experience with REST/SOAP integrations and APIs Good understanding of ServiceNow architecture and data model Ability to work independently in a contract role Desirable: ServiceNow certifications ...

Back End Developer

Hiring Organisation
Experis
Location
Croydon, London, United Kingdom
Employment Type
Contract
Contract Rate
£520 - £522/day
grade systems. Key Responsibilities Design, build, and maintain robust backend services using Java Develop and integrate event-driven systems using Kafka Build and consume REST APIs to support internal and external services Collaborate closely with product owners, architects, and other engineers Write clean, maintainable, and well-tested code Support system ...

ServiceNow Technical Architect

Hiring Organisation
Stott & May Professional Search Limited
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£575 - £614 per day
ServiceNow Architect with specialisation in CSM module * Expertise in ServiceNow CSM deployments, including case management, workflows, and portals * Hands-on experience with integration solutions (REST, SOAP, APIs, MID Server, Integration Hub) * Experience leading multiple ServiceNow implementation projects, including at least 3 full lifecycle implementations * Knowledge of ServiceNow Orchestration, Flow Designer ...

London Market Claim Center Integration Developers

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
From £500 to £525 per day
delegated authority, bordereaux, syndicate operations, and regulatory reporting. Key Responsibilities Guidewire Integration Development Design and develop integrations using Guidewire Integration Framework (GOSU, SOAP/REST Web Services, Messaging, Batch Processes) Build integrations with key London Market systems such as: Lloyd's Delegated Data Manager (DDM) Velonetic (Central Settlement, CLASS … sprint planning, and PI planning Required Skills & Experience Technical Skills Strong hands-on experience with Guidewire 10+ (ClaimCenter) Expertise in: GOSU programming SOAP/REST Web Services Messaging, Kafka, MQ, ESB/MuleSoft, Dell Boomi, Azure Integration Services (if applicable) JSON, XML, XSD, XSLT SQL, Oracle, or SQL Server Familiarity ...

Salesforce Senior Developer

Hiring Organisation
Access Computer Consulting
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £500/day
governor limits and performance optimisation principles for efficient and scalable applications for a large active user base. Expertise in large-scale integration using SOAP, REST, Streaming (including Lightning Events), and Metadata APIs, facilitating the seamless connection of Salesforce with other systems. Please apply ASAP to find out more. ...