1 to 25 of 41 JSON Jobs in London

Senior Software Engineer

Hiring Organisation
Cyber Guardian Consulting Group, LLC
Location
City of London, London, United Kingdom
alerts, retries) Help shape engineering culture and hiring as we build out the London team Required Qualifications Strong experience working with REST APIs and JSON/XML payloads Proficiency in Python or other backend languages Proficient or experienced with cloud technologies such as AWS, Azure, or GCP Experience debugging ...

Developer (MS) (18 Months FTC)

Hiring Organisation
London Borough of Barnet
Location
Barnet, London, United Kingdom
Employment Type
Contract
Contract Rate
£56376 - £61653/annum
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 the ability ...

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
operationalizing AI solutions. Practical experience architecting and implementing RAG-based systems using Azure Search or vector index stores. Strong programming experience in Python, C#, JSON, or Node.js for integrating AI models and building backend services. Experience with Azure cloud services including Azure Functions, Logic Apps, Storage, App Services, Key Vault ...

Developer (AI/RPA) (18 Months FTC)

Hiring Organisation
London Borough of Barnet
Location
Barnet, London, United Kingdom
Employment Type
Contract
Contract Rate
£56376 - £61653/annum
workflows, bots and automation solutions - Experience developing and maintaining automated pipelines for AI tools - Ability to integrate multiple systems and applications using APIs, JSON, XML, CSV, or other data interchange methods. - Knowledge of database environments (e.g., MS SQL, Dataverse, OneLake). - Experience working with or supporting machine learning models, including ...

Quality Assurance Automation Engineer

Hiring Organisation
Retelligence
Location
City of London, London, United Kingdom
Move beyond surface-level checks; you will utilize SQL and exploratory techniques to identify root causes within high-velocity messaging streams ( FIX, Swift, XML, JSON ). Pipeline Mastery: Own the quality gate within the CI/CD lifecycle, ensuring automated triggers and data quality checks are seamless and fail-safe. ...

Workday Integration Developer

Hiring Organisation
Experis
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £501 per day
Integration: Experience with RESTful and SOAP APIs to connect Workday with other systems and applications. Data Formats: Familiarity with various data formats like XML, JSON, and CSV for data exchange and transformation. Database Skills: Understanding of database concepts and SQL for managing and querying data. Security and Authentication: Knowledge ...

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
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, indexing, semantic search ...

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 ...

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
extensive knowledge in CICS webservices. Development experience using FileAid, Xpeditor, IBM Explorer for z/OS, and Visual Studio. Proficient with SOAP, WSDL, and JSON, with a comprehensive understanding of SOA and RESTful APIs. Experience working with code repositories, bug tracking tools, and wikis. Tools include GitLab, Endevor, JIRA ...

PEGA Developer

Hiring Organisation
LA International Computer Consultants Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
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 in Pega, including Data Pages, data ...

Mainframe Engineer

Hiring Organisation
Impellam Group
Location
London Area, 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. ...

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
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 in Pega, including Data Pages, data ...

Mulesoft Architect

Hiring Organisation
167 Solutions Ltd
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Anypoint Platform (Studio, API Manager, Runtime Manager) Solid understanding of API-led connectivity and enterprise integration patterns Experience with REST, SOAP, RAML/OpenAPI, JSON, XML Strong DataWeave development and transformation experience Familiarity with CI/CD pipelines and cloud deployment models Ability to manage both design-level architecture ...

Shopify Developer

Hiring Organisation
Halian Technology Limited
Location
Central London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£55,000
HTML5, CSS3/SCSS, JavaScript ES6+) Experience building custom Shopify themes (not just modifying pre-built themes) Familiarity with Shopify 2.0 architecture (sections everywhere, JSON templates) Experience integrating third-party apps and APIs Strong understanding of responsive design principles Git/version control experience Ability to manage multiple client projects ...

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 ...

Java Developer with SQL & GIT

Hiring Organisation
Randstad Digital
Location
London, United Kingdom
Employment Type
Permanent
Salary
£90,000
Very good understanding of industry standard trading protocols like FIX FpML Proficiency with Data Standards Data Modelling Proficiency with textbased formats like XML JSON Strong Proficiency with messaging frameworks MQ Kafka Proficiency with Spring Spring Boot Spring Integration Familiarity with testing patterns and dev ops Familiarity with cloud containerization Comfortable ...

Azure AI Architect

Hiring Organisation
Infoplus Technologies UK Ltd
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
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 ...

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
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 ranking. Knowledge ...

Data Engineer

Hiring Organisation
DCV Technologies Limited
Location
London, United Kingdom
Employment Type
Contract, Work From Home
scalability. Key Responsibilities Design and configure IBM DataPower services (MPGW, XML Firewall, WS-Proxy) Expose CICS, IMS, DB2 and MQ services via REST/JSON and SOAP APIs Implement API security including OAuth2, JWT, TLS/mTLS and AAA policies Deliver XSLT and GatewayScript transformations and schema validation Integrate with ...

Mainframe Modernization - IBM DataPower Engineer

Hiring Organisation
DCV Technologies
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£575 - £625/day - Inside IR35
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: Develop and configure DataPower services (MPGW ...

Collibra Integration Engineer

Hiring Organisation
RedCat Solutions
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 415 Daily
Experience operating Collibra or a similar metadata/governance platform Exposure to DIP/CDQ, EDGE or Lineage Harvester Understanding of REST APIs and JSON Exposure to Python or other Scripting languages Experience within data integration or ETL environments This is a 6-month contract paying £415 per day, inside ...

Ruby on Rails Engineer

Hiring Organisation
Rise Technical Recruitment
Location
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 ...

Pega Lead System Architect LSA

Hiring Organisation
Randstad Digital
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£80,000
Digital Messaging. Define non-functional requirements (scale, resiliency) and node strategy: Queue Processors vs. Job Schedulers, background processing, caching. Integration architecture: REST/JSON, SOAP (if needed), OAuth2/SAML, eventing (Kafka/JMS), idempotency, pagination, circuit breaker and retry patterns. Data design: enterprise data model, data pages (scope, refresh ...

BI Data Developer

Hiring Organisation
Chambers and Partners
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
working knowledge of data integration and modelling, including writing SQL, working with relational databases, and connecting to data sources such as Databricks, data lakes, JSON files, and API-driven services. Experience working confidently across multiple, complex datasets, understanding data lineage, definitions, and limitations, and ensuring outputs are accurate, consistent ...

Head of Engineering

Hiring Organisation
Zeus® | AI-Powered Logistics
Location
City of London, London, United Kingdom
/S/4HANA patterns), TMS, WMS, carrier/telematics platforms, customer master systems Own integration architecture across: Inbound/outbound APIs (REST/JSON), event-driven messaging (queues/topics), batch feeds, file-based interfaces (S3-based exchanges), structured email fallbacks Demonstrate practical experience with API management and integration ...