1 to 25 of 97 JSON Jobs in London

Dynamics Integration Specialist

Hiring Organisation
Vivo Talent
Location
Kingston Upon Thames, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 70,000 - 71,000 Annual
Dynamics 365, including Customer Engagement (CE), Finance & Operations or Business Central. Strong hands-on experience with Dataverse Web API, REST/SOAP APIs, OData, JSON and XML. Proficiency in Azure integration services, including Logic Apps, Azure Functions, Service Bus, API Management and Data Factory, alongside Power Automate. Solid understanding ...

QA/Test Engineer

Hiring Organisation
Version 1
Location
London, UK
Employment Type
Full-time
following technologies Java, Selenium, Cucumber BDD, REST Assured, BrowserStack, Postman/Bruno, PostgreSQL, Microsoft Azure, Azure DevOps (sprint backlogs, pipelines, test plans), GIT, YAML, JSON, OpenText Web Inspect, JMeter Highly skilled in creating, maintaining and peer reviewing test automation code, preferably in Java Previous working experience supporting, contributing ...

QA Automation Engineer / Consultant

Hiring Organisation
Methods Consulting
Location
London, UK
Employment Type
Full-time
experience with Serenity BDD, Cucumber/Gherkin, Selenium WebDriver and REST Assured, supported by frameworks such as JUnit and AssertJ.Strong understanding of REST APIs, JSON, authentication, validation and error handling. Experience testing distributed or microservice-based applications, including asynchronous processing and messaging. Ability to verify complete business workflows across service ...

Integration Developer

Hiring Organisation
GCS
Location
Enfield, London, Enfield Town, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £700/day
Strong SQL and T-SQL development skills. Experience designing and supporting ETL solutions. Hands-on experience with REST and SOAP integrations. Strong knowledge of: JSON XML Data Mapping Data Transformation API Integrations Experience troubleshooting and supporting production integration services. Experience working within Agile delivery environments. Desirable Skills MuleSoft Dell Boomi ...

Senior C# .Net Developer

Hiring Organisation
ARM
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500/day Umbrella Inside IR35
Preferred Stack C# | .NET Core/.NET 8 | ASP.NET Core | REST APIs | SQL Server | Entity Framework | Azure | Azure DevOps | Git | Docker | Kubernetes | Kafka | Redis | JSON/XML | Swagger/OpenAPI Disclaimer: This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource ...

Senior C# .Net Developer

Hiring Organisation
Advanced Resource Managers Limited
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£500.00 per day
Preferred Stack C# | .NET Core/.NET 8 | ASP.NET Core | REST APIs | SQL Server | Entity Framework | Azure | Azure DevOps | Git | Docker | Kubernetes | Kafka | Redis | JSON/XML | Swagger/OpenAPI Disclaimer: This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource ...

C# Senior Developer

Hiring Organisation
Quant Capital
Location
London, UK
Employment Type
Full-time
MSMQ or RabbitMQ Experience of web technologies including HTML, CSS, JavaScript, jQuery and web client frameworks such as Knockout.js or Angular Experience of XML, JSON and related like schemas and XSLT transformations Experience of T-SQL for Microsoft SQL Server (2012 or higherThis role is for candidates who are looking ...

Senior C# .Net Developer

Hiring Organisation
Advanced Resource Managers (A.R.M.)
Location
London, UK
Employment Type
Full-time
coding Preferred StackC# | .NET Core/.NET 8 | ASP.NET Core | REST APIs | SQL Server | Entity Framework | Azure | Azure DevOps | Git | Docker | Kubernetes | Kafka | Redis | JSON/XML | Swagger/OpenAPIDisclaimerThis vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering ...

Senior Microsoft Power Platform and AI Developer

Hiring Organisation
Methods Consulting
Location
London, UK
Employment Type
Full-time
tools, or equivalent tool-based agent integration patterns, including troubleshooting identity, permissions and data flow. Strong API and integration skills, including REST/JSON, custom connectors, OAuth 2.0, Microsoft Entra ID and secure secrets management. Pro-code engineering capability in one or more languages such as TypeScript/JavaScript, C# ...

Fixed Income E-Trading Senior Java Developer - Vice President

Hiring Organisation
Citigroup
Location
London, UK
Employment Type
Full-time
Agile globally distributed team using tools such as Jira, Bitbucket, Sonar & Team CityWorked with tools such as IntelliJ, Gradle, etc.,Experience on JSON/XML and REST serviceEducation: Bachelor's degree/University degree or equivalent experienceCompetencies: Excellent communication skills, oral and written; ability to face off to business users. ...

Lead Developer- C#

Hiring Organisation
Quant Capital
Location
London, UK
Employment Type
Full-time
MSMQ or RabbitMQ Experience of web technologies including HTML, CSS, JavaScript, jQuery and web client frameworks such as Knockout.js or Angular Experience of XML, JSON and related like schemas and XSLT transformations Experience of T-SQL for Microsoft SQL Server (2012 or higherThis role is for candidates who are looking ...

Senior Digital Developer – ODM

Hiring Organisation
NHS Blood and Transplant
Location
England, S75 3FG, Liverpool, L24 8RB, Birmingham, B15 2SG, London, NW9 5BG, SW17 0RB, Bristol, BS34 7QH, Barnsley, Manchester, M13 9LL, United Kingdom
Salary
£49387.00 to £56515.00
queries Other Mandatory Skills Estimation methods, SOLID design principles, Agile/Lean and Traditional Methodologies. OOAD and UML Techniques. HTML, JavaScript, JQueryXML, XSD, JSON Network architecture and protocols such as SNMP, HTTP, SOAP, REST and SOA Web Services,Testing Strategies, Testing Tools SQL Developer as testing tool, JMeter, APEXSec, cURL ...

Test Engineer - SC Cleared

Hiring Organisation
Gazelle Global Consulting Ltd
Location
London, United Kingdom
Employment Type
Contract
Java automation: Selenium WebDriver, REST Assured, Playwright, Cucumber BDD - Building automation frameworks from scratch - UI and API automation best practice - REST API testing, JSON/XML validation, Postman, Insomnia, Swagger - Full testing lifecycle, from design to production validation - Accessibility testing (WAVE, AXE, VoiceOver) and WCAG compliance - CI/CD integration ...

Marketing Cloud Technical Architect

Hiring Organisation
Vertex I.T. Solutions Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 35 Annual
construction, token management, and troubleshooting API-driven data streams. Web Technologies: Strong proficiency in full-stack web development basics (HTML, CSS, client-side JavaScript, JSON, XML) for building robust CloudPages and preference centres. Data & Security: Deep understanding of ETL processes, relational data modelling, and enterprise security standards (OAuth, SSL, data ...

Application Developer (IT) - London - FTC

Hiring Organisation
Saffery
Location
London, UK
Employment Type
Full-time
Copilot Studio. Some experience working with Microsoft Foundry would be beneficial. Working knowledge of Dataverse, solution management, and ALM concepts. Understanding of PowerFX, JSON, JavaScript and basic API/integration principles. Familiarity with Microsoft 365 and Azure fundamentals. Experience working in a structured development environment (e.g., DevOps).Strong problem-solving ...

Test Analyst / Software Tester

Hiring Organisation
AWD online
Location
Hounslow, Middlesex, United Kingdom
Employment Type
Full-Time
Salary
£40,000 - £50,000 per annum
functional, regression, integration and API testing concepts Ability to read basic technical documentation, data flows and integration diagrams Familiarity with REST/SOAP APIs, JSON, XML and integration testing basics Knowledge of SQL for data validation Experience testing within Agile delivery teams and sprint cycles Awareness of automation testing concepts ...

Java Developer

Hiring Organisation
Hastings Direct
Location
London, UK
Employment Type
Full-time
level applications. Experience of Java/JVM/Spring based languages Object oriented analysis and design Source Management software such as GitHub SOAP, REST, JSON, XMLJSON & XML; HTML; CSS and JavaScript Knowledge of a Test driven approach including exposure to either TDD or BDD would be an advantage Desirable Experience ...

Murex Risk Developer

Hiring Organisation
ARM
Location
London, United Kingdom
Employment Type
Contract
users. Technical Skills Strong experience with several of the following: * SQL* Oracle/relational databases * Unix/Linux * Shell scripting * Python * Java * XML/JSON * REST APIs/integration technologies * Git or equivalent source-control tools * CI/CD and DevOps processes * Batch scheduling/enterprise schedulers Strong ...

Murex Risk Developer

Hiring Organisation
Advanced Resource Managers Limited
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£60.00 - £63.00 per hour
users. Technical Skills Strong experience with several of the following: * SQL* Oracle/relational databases * Unix/Linux * Shell scripting * Python * Java * XML/JSON * REST APIs/integration technologies * Git or equivalent source-control tools * CI/CD and DevOps processes * Batch scheduling/enterprise schedulers Strong ...

Python Developer

Hiring Organisation
Sanderson Government and Defence
Location
City of London, London, United Kingdom
Employment Type
Contract
PostgreSQL OpenSearch Redis/Valkey GuardDuty WAF CloudTrail NGINX and containerised logging solutions. Identity and access management concepts including OIDC and SAML . JSON Schema development and validation. Technical writing and creation of integration documentation. Threat modelling and security-focused development practices. Additional Desirable Attributes Experience running technical workshops ...

Contract Quality Assurance Engineer

Hiring Organisation
Deerfoot Recruitment Solutions Ltd
Location
Hounslow, Middlesex, United Kingdom
Employment Type
Full-Time
Salary
£340.00 - £380.00 per day
control, baggage or ramp); safety-critical or regulated systems; Playwright, Selenium, Robot Framework, Cypress, Karate or Appium; Postman or SOAP UI; Jenkins and GitHub; JSON, SQL, Kafka or Grafana; performance, resilience or security testing; Python or Java; ISTQB; testing AI-powered or agentic capabilities Ready to Apply? If you want ...

Contract Quality Assurance Engineer

Hiring Organisation
Deerfoot Recruitment Solutions Limited
Location
Hounslow, London, United Kingdom
Employment Type
Contract
Contract Rate
£340 - £380/day
control, baggage or ramp); safety-critical or regulated systems; Playwright, Selenium, Robot Framework, Cypress, Karate or Appium; Postman or SOAP UI; Jenkins and GitHub; JSON, SQL, Kafka or Grafana; performance, resilience or security testing; Python or Java; ISTQB; testing AI-powered or agentic capabilities Ready to Apply? If you want ...

Golang Software Engineer

Hiring Organisation
InfoSum
Location
London, UK
Employment Type
Full-time
times in the performance of duties for InfoSum. Requirements4+ years experience with Go; JavaScript experience would be nice to have. Familiarity with api-design, json schemas and docker. Strong understanding of software development methodologies, design patterns, and best practices. Familiarity with database technologies (e.g., SQL) and data modeling concepts. Knowledge ...

Dynamics 365 CE Developer

Hiring Organisation
Morson Edge
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - 550 per day
Automate flows and Canvas Apps Strong skills in Dynamics 365 CRM configuration, customisation, and integration capabilities Expertise in integration technologies like Logic Apps, HTTP, JSON Proficiency in programming languages such as .NET, C#, JavaScript Development and Project Leadership Experienced in developing Dynamics plugins and enhancing forms with JavaScript and HTML ...

Technical Architect Fintech

Hiring Organisation
Quant Capital
Location
London, UK
Employment Type
Full-time
various application software and hardware components Excellent understanding of programming language, frameworks and processes (C#, C++, SQL Server, Java, ASP.NET MVC, WCF, HTML, XML, JSON, CSS, Bootstrap, AJAX, jQuery, UML, REST API, React, AngularJS) Experience of conceptual, logical and physical data modelling Excellent understanding of cloud based infrastructure and software ...