1 to 25 of 44 JSON Jobs in London

Senior Integration Engineer (Azure)

Hiring Organisation
Randstad Technologies
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£450 - £600 per day
legacy by actively mentoring our permanent engineering team. What You Bring Integration Expertise: 5+ years of software development experience building robust APIs (REST, SOAP, JSON, XML) using C#, .NET, JavaScript, or Python. Azure Mastery: Deep, proven knowledge of Azure Integration Services, including API Management, Logic Apps, Service Bus, Azure Data ...

Mid-Senior Ruby on Rails Engineer (B2B SaaS | Hybrid | UK)

Hiring Organisation
Transreport
Location
City of London, London, United Kingdom
experience with PostgreSQL, including performance tuning and complex queries. Experience with background job processing using Sidekiq and Redis. Solid understanding of RESTful API design, JSON serialization, and authentication (e.g., JWT, SSO). Hands-on experience with AWS services and containerised deployments (Docker). Experience troubleshooting and supporting production systems. Comfortable ...

Senior Integration Analyst & Developer

Hiring Organisation
Outsource
Location
London, United Kingdom
Employment Type
Contract, Work From Home
role involves designing, building, and supporting integrations using Oracle Integration Cloud (OIC), along with developing transformation logic using SQL, PL/SQL, XML, JSON, XSLT, and related technologies. You will also build and enhance BIP reports and data models, develop VBCS applications, and support Fusion ERP integration touchpoints. Key responsibilities ...

Technical Power Platform Consultant

Hiring Organisation
Mphasis
Location
City of London, Greater London, UK
Experience with Power BI, DAX, Power Query, and data modeling. Knowledge of SharePoint, Microsoft Teams, Azure Logic Apps, and Microsoft 365 ecosystem. Experience with JSON, REST APIs, and scripting (e.g., PowerShell or JavaScript). Familiarity with Agile methodologies and DevOps practices. Excellent problem-solving, communication, and interpersonal skills. Preferred Qualifications ...

Senior Developer

Hiring Organisation
University of the Arts London
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£44,375 - £52,977 per annum
Developer and a Junior Developer. Experience Extensive experience of developing websites and web applications using PHP 8+, MySQL, JavaScript, HTML5, CSS3, AJAX/JSON Good working understanding of CMS and frameworks such as Drupal, WordPress, Craft and Laravel Proficiency and application of WCAG 2.2 accessibility guidance Knowledge of microservices, APIs ...

UI Engineer

Hiring Organisation
McCabe & Barton
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£85,000
integrations from third-party systems using APIs connected to back-office systems. Build and maintain web applications to support business processes (C#, Razor, ASP.NET, JSON, Redis Cache, Microservices). Technical Skills & Experience 5+ years of professional experience in .NET-based front-end development. 5+ years of hands-on expertise ...

Senior Technical Consultant - ServiceNow

Hiring Organisation
COMPUTACENTER (UK) LIMITED
Location
South East London, London, United Kingdom
Employment Type
Permanent
ServiceNow platform, including functionality, database structure, developer APIs, and development tools. Proficient in Web Technologies (e.g., JavaScript, SOAP/REST web services, XML & JSON). An open and friendly personality with strong customer-facing skills in both a virtual and face to face setting (including the ability to deliver presentations ...

DevOps Engineer (SC cleared)

Hiring Organisation
Lynx Recruitment Ltd
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
/CloudFormation) CI/CD pipelines (e.g. Jenkins, Git) Serverless tech (AWS Lambda, API Gateway) Linux systems knowledge Scripting/coding (Python, YAML/JSON) Experience with enterprise systems Strong communication skills ...

Front End React Developer

Hiring Organisation
Ascend Consulting
Location
NW7, Mill Hill, Greater London, United Kingdom
Employment Type
Permanent
Salary
£45000 - £75000/annum Great Benefits
core principles Experience with Redux and RTK (RTKQuery also a bonus) Familiarity with RESTful APIs Knowledge of modern authorization mechanisms, such as JSON Web Token Familiarity with modern front-end build pipelines and tools (Github actions a bonus) Experience with common front-end development tools such as Babel, Webpack ...

Mainframe Engineer

Hiring Organisation
Impellam Group
Location
City of London, London, United Kingdom
CICS webservices, ZOS Connect EE, DB2, and batch processing. Strong skills in mainframe transaction management, JCL, and system debugging tools. Familiarity with SOAP, WSDL, JSON, and integration patterns such as SOA and RESTful APIs. Good working knowledge of AWS services, particularly CloudWatch, DynamoDB, and Lambda, including monitoring, troubleshooting, and optimisation. ...

ServiceNow Developer

Hiring Organisation
People First (Recruitment) Ltd
Location
London, United Kingdom
Employment Type
Temporary
Salary
£45 - £65/hour
Strong ServiceNow development experience Hands-on development experience on the Service Portal Strong technical background using web technologies (specifically HTML, AngularJS, Bootstrap, CSS, JavaScript, JSON, HTTP, REST/SOAP) ServiceNow integration experience ServiceNow Customer Service Management experience desirable ( CIS-CSM certification ideal) ServiceNow Certified Application Developer (CAD) Working within ...

Software Engineer

Hiring Organisation
Scalian
Location
Hounslow, Greater London, UK
management, concurrency, and object-oriented design . Hands-on experience with AngularJS and front-end development ( HTML, CSS, JavaScript ). Familiarity with REST APIs , JSON , and web service integration . Experience working in software maintenance/support roles with bug fixing and system enhancements. Strong debugging and problem-solving skills ...

Test Manager

Hiring Organisation
coforge
Location
London, United Kingdom
Employment Type
Permanent
/or NDC. Hands-on experience with test management tools such as JIRA, ALM, qTest, Zephyr. Good understanding of APIs (REST/SOAP), XML, JSON, NDC schemas. Knowledge of automation tools (Selenium, Postman, Karate, RestAssured). Experience 8 15+ years in QA/testing, with at least 3+ years ...

Founding Engineer

Hiring Organisation
Tarka Talent
Location
London Area, United Kingdom
with AI or ML systems in production and 3–5 years of substantive software/platform engineering Deep JavaScript/Node.js skills Azure Fluency JSON data structures, REST API design, and complex semi-structured data Practical LLM application — RAG architectures, prompt engineering etc Comfort with both relational ...

Head of Software Engineering

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
asset security protocols. Technical Experience: Experience designing/leading a team that is API-forward and has built distributed scalable,systemsusingOpenJDK, Gradle,Intellij,Postgresql, JSON, JUnit, Quartz, JWT, JOOQ, Liquibase, Docker, Kubernetes, AWS Cloud Stack, Confluentand more. Hands-on experience with modern engineering tools and practices (e.g., Kubernetes, microservices ...

Senior Full Stack Engineer

Hiring Organisation
Access Computer Consulting
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £440/day
Docker. Experience in building responsive, component based user interfaces using modern front end frameworks. Hands on expertise in API design and development (REST/JSON), including versioning and backward compatibility. Experience with UI testing, component testing, and front end build tooling. Experience in CI/CD pipelines, GitOps workflows ...

Oracle Integration Cloud Developer

Hiring Organisation
ARM
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £600/day Inside IR35
integration, security, and performance Required Skills: Strong experience with Oracle Integration Cloud (OIC) Knowledge of REST/SOAP web services Experience with XML, XSLT, JSON Familiarity with Oracle SaaS (ERP/HCM) integrations Understanding of integration patterns and workflows Preferred Qualifications: Experience with Oracle SOA Suite/ICS Basic knowledge ...

DevOps Engineer / ElasticSearch SME

Hiring Organisation
Hays
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£450.0 - £500.0 per day + up to £500pd (inside IR35)
e.g. Docker, VMware) and Linux with Shell scripting. Hands-on experience supporting ElasticSearch integrations (indexing, query DSL etc) and experience supporting search-driven services (JSON, Logstash, Kibana etc) Experience with Platforms and Operation Systems including, Oracle Solaris 10, Red Hat Enterprise Linux 8, Windows Server 2008/2016/ ...

Ruby Developer

Hiring Organisation
Proactive Appointments
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 70,000 - 80,000 Annual
Strong understanding of OOP & Rails architecture Extensive experience with PostgreSQL (performance tuning, complex queries) Background job processing with Sidekiq & Redis Expertise in RESTful APIs , JSON, JWT, SSO Experience with AWS & Docker Production system support & troubleshooting Strong communication skills & Agile/Scrum experience Ruby on Rails Developer Due to the volume ...

SOC Engineer - 6 Month FTC

Hiring Organisation
Precise Placements
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£65,000 - £80,000 per annum
Technical Expertise Hands-on experience with leading SIEM platforms (e.g., Exabeam, LogRhythm, ArcSight, Microsoft Sentinel, Splunk, QRadar, Elastic). Strong understanding of log formats (JSON, syslog, XML, CEF, etc.) and ingestion technologies (Syslog, API, Event Hubs, Kafka, Agents). Practical knowledge of detection engineering, threat modelling, and attacker behaviour analysis. ...

Senior OPERA PMS & OHIP Specialist

Hiring Organisation
Salt
Location
London Area, United Kingdom
Reservations & Front Desk Cashiering & Folios Profiles & Rate Management Night Audit processes Proven experience with OHIP (Oracle Hospitality Integration Platform) Strong understanding of: REST APIs & JSON API testing tools (Postman or similar) Ability to map API payloads back to real OPERA behaviour Strong analytical mindset — you enjoy digging into data inconsistencies ...

Ruby on Rails Backend Engineer

Hiring Organisation
Rise Technical Recruitment
Location
Fulham, London, United Kingdom
Employment Type
Permanent
Salary
£60000 - £80000/annum Private Healthcare + Holiday + Pensi
Rails developer with deep expertise in PostgreSQL and background processing via Sidekiq and Redis. You should be highly proficient in building RESTful APIs, managing JSON serialisation, and implementing secure authentication methods like JWT or SSO. Beyond coding, you will possess knowledge of Docker and AWS, alongside the communication skills required ...

Principal Solutions Consultant

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
customer experience platforms.* 3+ years leading large, strategic, and complex enterprise deals.* Deep technical fluency with web/scripting technologies (HTML, CSS, JavaScript, JSON, LLMs, MCP) and SaaS architectures.* Proven success in positioning the business value of technical solutions and the strategic role of Professional Services and Partners.* Hands ...

Azure Integration Engineer

Hiring Organisation
Chroma Recruitment Ltd
Location
South West London, London, United Kingdom
Employment Type
Contract
Azure stack, particularly Logic Apps and Function Apps - Familiarity with Microsoft Power Platform - A strong background in API integrations and data pipelines across REST, JSON, XML and JDBC Outside IR35. Immediate start required. If this sounds like the right fit, get in touch with Megan ...

Automation Software Engineer - Power Automate - £650/day 6mths

Hiring Organisation
Adecco
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£600 - £650 per day
What you'll be doing Building and orchestrating automations using Power Automate (core skill) Working with stand-alone APIs and small structured datasets (CSV, JSON, spreadsheets) Automating ITSM processes, checklists, and onboarding (JML) Consolidating data into Azure DevOps dashboards Supporting ServiceNow CI/CD integrations (read-only) Delivering PoCs Creating ...