16 of 16 JSON Jobs in Central London

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 ...

Quality Assurance Engineer

Hiring Organisation
Harnham
Location
City of London, London, United Kingdom
such as HTML, CSS and JavaScript. • Hands‐on experience with tools such as Selenium, Playwright or similar automation frameworks. • Solid understanding of API testing, JSON/XML formats and tools such as Postman or Swagger. • Familiarity with CI/CD pipelines and version control. • Comfortable working in data‐rich environments ...

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 ...

Senior Data Engineer (GCP)

Hiring Organisation
AGIT
Location
City of London, London, United Kingdom
audit logging Integration & Interoperability • Integrate with enterprise systems (ERP, APIs, SFTP, event streams) • Build reusable ingestion frameworks for structured and semi-structured data (JSON, XML, Parquet, Avro) Data Quality & Observability • Implement data quality and testing frameworks (dbt, Great Expectations, or similar) • Establish monitoring, alerting, and observability across pipelines and platforms ...

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 ...

Collibra Integration Engineer

Hiring Organisation
ITHR Group plc
Location
City of London, London, United Kingdom
Office/Excel/Visio Knowledge of Agile , GDPR/CCPA , and compliance standards Strong analytical/problem‐solving mindset Exposure to C# , Python , JSON , or similar languages Before applying, please esnure you are happy to work three days in the office. (The entire bank globally operates under this model ...

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. ...

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 ...

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 ...

Data Analyst

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 ...

Systems Integration Engineer | E-commerce | Shopify | Fully Remote | £280 Outside IR35

Hiring Organisation
VirtueTech Recruitment Group
Location
Central London / West End, London, United Kingdom
integration environments Strong API integration experience (Shopify, Magento, SAP, Oracle etc.) Experience integrating with ERP, OMS & PIM systems Knowledge of integration methods (API, EDI, JSON, XML, streaming) Familiarity with AWS, SQL & analytics/reporting tools Experience working in Agile environments Strong problem-solving & stakeholder management skills 🌟 This is a high ...

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 ...

Java Developer

Hiring Organisation
Sanderson Government and Defence
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £460 per day + Inside IR35
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. Reasonable Adjustments: Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome ...

Integrations Technical Business Analyst

Hiring Organisation
Hays Technology
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £670/day £600-£670pd Inside IR35 via Umbrella
business and technical requirements gathering, process mapping, and documentation . Ability to act as a bridge between technical teams and business stakeholders , translating JSON files and developer language into clear business terms. Experience working with Azure integration technologies (Logic Apps, Functions, Service Bus) and familiarity with Workday, iManage ...

Solutions Engineer

Hiring Organisation
SEEKR
Location
City of London, London, United Kingdom
with citations – in seconds You might be a fit if You write solid Python and actually enjoy debugging ugly real‐world data and integrations JSON, APIs and webhooks are just part of how you think about systems You’ve built data/ML/automation workflows before and can roughly ...

Configuration Engineer

Hiring Organisation
EXL Service
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
focuses on building and maintaining configuration-driven solutions that power enterprise-grade insurance SaaS platforms. You will translate business and functional requirements into structured JSON and YAML configurations, enabling dynamic forms, workflows and rule engines without heavy custom code. Working closely with business analysts, developers and QA teams, you will … particularly exposure to policy administration, underwriting, claims or insurance workflow systems. As part of your duties, you will be responsible for: Configure and manage JSON and YAML-based configurations for forms, rules and workflows Define dynamic UI forms, field validations and conditional logic using configuration files Implement and maintain business ...