18 of 18 JSON Jobs in the City of London

AI Architect

Hiring Organisation
Wipro
Location
City of London, London, United Kingdom
lead design forums. Preferred Skills Experience designing AI gateways , MCP (Model Context Protocol) implementations, and agent registries ; familiarity with metadata standards (DCAT/JSON‐LD). Exposure to enterprise AI platforms/labs and accelerators Knowledge of infrastructure automation in DC/cloud (orchestration, provisioning) with AI workloads ...

Full Stack Developer

Hiring Organisation
Coltech
Location
City of London, London, United Kingdom
product stakeholders. Contribute to continuous improvement of engineering practices and platform capabilities. Required Technical Expertise Strong hands-on development experience with: Java Python Node.js JSON Experience designing and building APIs and microservices architectures . Experience working within cloud environments , particularly: Google Cloud Platform (GCP) Strong understanding of containerised environments , including ...

Principal Software Engineer

Hiring Organisation
Verifone
Location
City of London, London, United Kingdom
cross‐service design decisions Strong understanding of security, authentication flows, and data protection in distributed systems API & Data Design and governance of RESTful APIs, JSON, and HTTP standards API versioning and backward‐compatibility strategies MongoDB/NoSQL expertise, including: Data modeling Indexing strategies Performance optimization Advanced experience with Java concurrency ...

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 ...

Integration Engineer (C#, Azure)

Hiring Organisation
Morson Edge
Location
City of London, London, United Kingdom
Azure DevOps or similar). Understanding of relational and non-relational data storage technologies. Experience working with structured messaging and data formats such as JSON, XML, and Avro. Awareness of modern security principles including token-based authentication, encryption in transit, and API security standards. Role Responsibilities Contribute to the evolution ...

Automation Test Engineer

Hiring Organisation
VIQU IT Recruitment
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£400 - 600 per day + Inside IR35
Bloomberg, MarkitWire). Strong understanding of multi-system message flows and ability to automate integrations involving outbound/inbound messages (EG: via XML, JSON). Strong SQL/reporting skills and familiarity with API driven automation. Experience with BDD or structured scenarios writing practices is required Ability to conduct root ...

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. ...

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 ...

Java Developer Contract

Hiring Organisation
Atrium (EMEA)
Location
City of London, London, United Kingdom
tools such as Apache Spark or in this instance LakeFS, for data processing and management. Useful: R, Apache Spark Very Useful: Python, SQL, JSON, LakeFS ...

Java Developer

Hiring Organisation
Experis
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£468 - £469/day
tools such as Apache Spark or in this instance LakeFS, for data processing and management. Useful - R, Apache Spark Very useful - Python, SQL, JSON, LakeFS. ...

Data Engineer

Hiring Organisation
Experis
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £510/day
working in cloud environments such as AWS or Azure is expected, with Databricks considered a nice to have. Required Skills: Java background Node JS Json RDS React Data Modelling Python/Spark Cloud experience (AWS/Azure) o AWS Glue o Databricks Testing e.g. PyTest Data Quality e.g. Great Expectations ...

Senior React Native Engineer - London Hybrid : £100k

Hiring Organisation
Hunter Bond
Location
City of London, London, United Kingdom
Bring 5+ years’ experience delivering production mobile apps for iOS and Android. Strong expertise with iOS/Android SDKs, remote data handling (REST/JSON) and third-party integrations. Solid understanding of mobile architecture, trends and best practices across the entire development lifecycle. Clear, confident communication skills — written, verbal ...

Senior AI Platform Engineer - GCP

Hiring Organisation
Harnham
Location
City of London, London, United Kingdom
Build and operate production-grade AI agents on GCP using Google ADK • Integrate AI systems with policy, claims and CRM platforms via REST/JSON APIs • Design scalable RAG pipelines (ingestion, chunking, vector search) • Implement evaluation, monitoring, A/B testing and cost/latency dashboards • Embed security, GDPR compliance ...

Lead AI Automation Engineer

Hiring Organisation
PaymentGenes
Location
City of London, London, United Kingdom
reporting Build event-driven workflows across email, Teams, APIs, and databases Architect Agent Systems Modular task decomposition Guardrails and validation layers Structured output validation (JSON schemas, rule checks) Logging, observability, fallback logic, and confidence scoring Secure credential and secrets management Governance & Scale Ensure explainability and traceability Design compliant automation aligned ...

Senior Software Engineer

Hiring Organisation
Major Players | B Corp™
Location
City of London, London, United Kingdom
React/Redux) Required Skills Solid understanding of API design principles (auth, scalability, security) Ability to work with diverse data formats such as CSVs, JSON, lists, etc. Experience writing complex database queries Prior work alongside data engineering teams or with platforms like Databricks, Kinesis, or large-scale ETL pipelines Experience ...

Platform Proposition Analyst

Hiring Organisation
Alexander Lloyd
Location
City of London, London, United Kingdom
Quote Aggregators or Product portals. Excellent interpersonal and stakeholder management skills, with the ability to influence effectively. Desirable (but not essential): Experience with XML, JSON messaging services, or platform integration. ...

QA Engineer - Payments

Hiring Organisation
Crisil
Location
City of London, London, United Kingdom
Integration Automation Automate testing of payment APIs using tools such as RestAssured, Postman, Karate, or equivalent. Validate message formats including MT/MX, XML, JSON and downstream system integrations. Develop automation for STP validation, exception handling, retries and fallback mechanisms. Automate reconciliation accuracy, intraday liquidity impacts and operational reporting validation. … Strong understanding of payment lifecycles and schemes (SWIFT, SEPA, ACH, RTP, FedNow, ISO 20022). Familiarity with message formats ( MT/MX ), XML/JSON parsing and validation tools. Experience with CI/CD pipelines and DevOps practices. Exposure to performance testing tools (JMeter, LoadRunner or similar) is a plus. ...

Data Analyst

Hiring Organisation
Tate Recruitment
Location
City of London, London, United Kingdom
depending on experience) We are seeking a Data Analyst with a strong focus on system integrations , specialising in APIs, REST, JSON, and Azure technologies . This is a hands-on role within a professional services environment, working closely with Architecture and Engineering teams to enable seamless data exchange across platforms. … Power BI, Fabric, Azure technologies). Writing clear documentation for integrations and data structures. Must-Have Experience Strong hands‐on experience with APIs, REST, JSON . Experience with Azure and Microsoft data tools. Good SQL skills; some Python or R is a bonus. Familiarity with Swagger/OpenAPI or Postman ...