1 to 25 of 47 JSON Jobs in London

testing REST APIs, GraphQL services, and microservice-based systems . Experience with API testing tools such as Postman or SuperTest and strong understanding of JSON schema validation . Hands-on experience with performance testing tools such as Apache JMeter, k6, or similar frameworks . Strong understanding of automation design patterns ...

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 ...

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 ...

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 ...

when needed to ship fixes or smaller features end-to-end. Tech Stack Backend: C#/.NET 6–10, Entity Framework Core, REST APIs, JSON Frontend: Vue.js 3+, Blazor (admin) AI Tooling: Claude Code, GitHub Copilot, Codex Infrastructure: Docker, GitHub Actions (CI/CD), Azure/AWS/GCP Testing ...

optimizing SQL queries on PostgreSQL databases. Strong experience with multithreading, data structures, and concurrency scenarios. Proficient in using REST APIs, XML, JAXB, and JSON in creating layered systems. Experience with AWS Services (AWS Lambda, AWS CloudWatch, API Gateway, ECS, ECR, SQS, SNS). Familiarity with Open AI APIs, Agentic ...

Skills Strong ServiceNow development experience (3+ years) Hands-on experience with Service Portal Solid background in web technologies including HTML, AngularJS, Bootstrap, CSS, JavaScript, JSON, HTTP, and REST/SOAP Experience with ServiceNow integrations Ability to work in Agile environments Strong troubleshooting and analytical skills Excellent written and verbal communication ...

within a team Technical Skills ServiceNow platform development and workflow configuration Web technologies: JavaScript, AngularJS, HTML, CSS, Bootstrap APIs and integrations: REST, SOAP, JSON, HTTP Experience building and maintaining ServiceNow integrations Strong troubleshooting, documentation and debugging capability Desirable Experience Experience with ServiceNow CSM (Customer Service Management) Exposure to Jira ...

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 ...

building UI tests with tools such as Selenium or Playwright. * Working knowledge of test frameworks such as JUnit or TestNG. * Understanding of APIs, HTTP, JSON and related testing tools. * Comfortable working in data-rich environments and validating data accuracy. * Experience using AI tools within your engineering workflow to accelerate development ...

record delivering across the ServiceNow platform Solid Service Portal development experience Strong technical background across: JavaScript, AngularJS, HTML, CSS, Bootstrap REST/SOAP APIs, JSON, HTTP Experience integrating ServiceNow with other systems Comfortable working in Agile environments Strong troubleshooting and problem-solving skills Nice to Have: Experience with Customer Service ...

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 ...

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. ...

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 ...

migration/transformation programmes* Expertise across conceptual, logical, and physical modelling* Strong stakeholder management skills* Experience working in Agile environments* Knowledge of UML, RDBMS, JSON/XML* Knowledge/experience of Erwin Desirable: * Knowledge of industry data standards (e.g. fpML, FIX, FIBO)* Experience with ontologies (RDF/OWL/ ...

validation and documentation of automation workflows - Strong troubleshooting and debugging skills in orchestration environments Good to have additional Skills - Scripting skills (Python, PowerShell, Bash, JSON/YAML processing) - CI/CD or version-controlled automation workflows (Git) - Experience in regulated enterprise environments ...

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 ...

Skills & Experience Strong experience with CSS3, JavaScript, and React. Experience with Back End development and SQL databases. Experience implementing REST APIs and working with JSON/XML data formats. Experience with Google Analytics and conversion/lead tracking systems. Experience building responsive, high-performing websites. Strong understanding of UI/ ...

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 ...

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 ...

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 ...

operate production‐grade AI agents on GCP using Google’s ADK Integrate AI systems with policy, claims and CRM platforms via REST/JSON APIs Develop scalable RAG pipelines including ingestion, text processing and vector search Implement evaluation, monitoring, A/B testing and cost/latency dashboards Shape architectural ...

playbooks and automations Good understanding of common attack techniques, TTPs, and frameworks such as MITRE ATT&CK Scripting or automation capability (e.g., Python, PowerShell, JSON, REST APIs) Strong analytical and problem-solving skills with a methodical approach to engineering delivery Experience working in a SOC or MSSP environment Familiarity with ...

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 ...

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 ...