1 to 25 of 69 JSON Jobs in London

Java Developer - Payments

Hiring Organisation
Crisil
Location
London, UK
APIs for payment processing, reconciliation, and message translation. Implement ISO 20022 (MX) to MT message transformation logic and related schema validation using XML/JSON parsers. Integrate with payment gateways, SWIFT interfaces, RTP/FedNow services , and internal systems like Core Banking or Treasury. Develop components supporting real-time payments ...

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 ...

Senior Engineer

Hiring Organisation
&Dine
Location
London, England, United Kingdom
clean architecture Frameworks – Vue/Nuxt (or React/Next.js), component-based development State management – Vuex, Pinia, or equivalent patterns API integration – REST/JSON, error handling, loading states Performance – bundle optimisation, code splitting, rendering strategies Accessibility & UX – semantic HTML, responsive design, usability best practice Testing – unit and component testing ...

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 ...

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 ...

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 ...

DevOps Engineer

Hiring Organisation
FDM Group
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £60,000 per annum
Code practices and implementation Strong understanding of networking, security, and system administration. Technical Skills Azure monitoring and Application Insights ARM/Bicep templates and JSON scripting PowerShell scripting Software development methodologies and practices Security best practices and risk management Technical Skills & Innovation Ability to monitor system performance, availability, and reliability ...

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 ...

Confluent Engineer

Hiring Organisation
LA International Computer Consultants Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 403 Daily
Confluent Platform components. * Strong understanding of event-driven architecture concepts (event streaming, event sourcing, Pub/Sub, stream processing). * Experience with Avro/JSON/Protobuf, schema evolution, and Schema Registry. * Integration experience with Back End systems such as SQL/NoSQL databases, APIs, and cloud data platforms. * Familiarity ...

Contract Software Engineer - eDV Cleared

Hiring Organisation
Searchability NS&D
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£600 - £800 per day
skills and a proactive, team-oriented approach. Confident client-facing communication skills. Desirable Skills & Experience Experience with Apache NiFi and Node.js . Familiarity with JSON, XML, XSD, and XSLT . Knowledge of Jenkins, Maven, BitBucket, and Jira . Exposure to AWS and cloud technologies. Experience working within agile methodologies (Scrum ...

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. ...

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 ...

Confluent Engineer

Hiring Organisation
eTeam Workforce Limited
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Daily
Confluent Platform components. Strong understanding of event-driven architecture concepts (event streaming, event sourcing, Pub/Sub, stream processing). Experience with Avro/JSON/Protobuf, schema evolution, and Schema Registry. Integration experience with Back End systems such as SQL/NoSQL databases, APIs, and cloud data platforms. Familiarity ...

Collibra Integration Engineer - 6 Month Contract

Hiring Organisation
RedCat Solutions
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 415 Daily
skills with the ability to work with technical and non-technical stakeholders . Desirable Experience Exposure to programming languages such as C#, Python or JSON . Familiarity with data privacy regulations such as GDPR . Certifications in Collibra or other data governance tools . Contract Details Contract Length: 6 months ...

Senior AI Engineer

Hiring Organisation
Harnham
Location
London Area, United Kingdom
first products that deliver measurable value. • Develop and deploy production‐grade AI agents on GCP using ADK, integrating with internal systems via REST and JSON APIs. • Build and maintain robust evaluation and monitoring frameworks, including online and offline testing, A/B experiments and performance dashboards. • Integrate AI agent functionality ...

Agentforce Developer

Hiring Organisation
Anson Mccade
Location
Central London, London, United Kingdom
Employment Type
Contract, Work From Home
Strong knowledge of testing methodologies (functional, regression, exploratory, UAT). Understanding of AI/ML concepts or LLM-based systems (preferred). Familiarity with JSON, APIs, and test automation frameworks. Exceptional analytical skills with strong attention to detail. Excellent communication skills and ability to work in Agile environments. Desired Qualifications ...

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 ...

Network Automation Engineers

Hiring Organisation
Tech Mahindra
Location
London, United Kingdom
Employment Type
Permanent
Salary
£60000 - £75000/annum
Cisco NSO – Service development and lifecycle Apache Airflow Hasi Corp Vault Openshift Automation development Python Fast API Rest API Netconf Yang modelling XML/Json Jinja/TextFSM Pytest Unit testing Database MongoDB DevOps Docker Git CI/CD Kubernetes Networking Ciena 517x/8180/8114 Nokia BNG/ ...

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 ...