1 to 25 of 98 Permanent JSON Jobs in London

These include:Must haves Proven track record as a developer in an insurance or financial services environment; Strong working knowledge of programming languages (e.g. SQL, C#, VBA, Javascript, XML, JSON, Python); Experience building Excel-integrated applications and/or web-based pricing platforms. Strong database skills (SQL Server or similar) and data integration experience; Proactive, collaborative, flexible and adaptable with More ❯

strong experience in test automation with an ETRM platform with as many of the following as possible: Programming & Scripting: Python, Java, JavaScript, C++, Scriban Web Technologies: RESTful APIs, HTTP, JSON, HTML, CSS, Node.js Databases: SQL Server, MySQL, PostgreSQL, MongoDB Tools & Frameworks: Git, Docker, Jenkins, Kubernetes, Agile (Scrum & Kanban), JIRA, Pytest, Powershell Operating Systems: Linux, Windows Additional skills that will set More ❯

optimising data models and complex queries in MySQL and MongoDB , supporting scalable, data-driven web applications. Extensive experience in designing, consuming, and documenting RESTful APIs , with strong competency in JSON , OAuth , JWT , and integration with third-party services. Advanced skills in Git workflows and CI/CD pipelines, with practical experience using Bitbucket , Azure DevOps , GitHub Actions , or similar tools More ❯

custom report experience through SQL Server Reporting Services (SSRS) and FetchXML .NET Framework Version 4.5 or above including strong WCF\ Web API experience Knowledge of Web development, HTML, CSS, JSON, XML, Javascript and SQL C# and OOPS concepts Good to have experience and knowledge of Microsoft Azure Power Apps and Portal Field Services Customer Insight What education and certification credentials More ❯

Platform technologies (Power Automate, Power Pages/Portals). Advanced configuration, customisation, and integration expertise in Dynamics 365 CE. Strong knowledge of integration technologies such as Logic Apps, HTTP, JSON, AJAX, OAuth2. Proficiency in .NET, C#, JavaScript, and related programming languages. Significant experience developing Plugins for Dynamics 365. Strong experience with JavaScript and HTML to enhance Dynamics form customisation. Proven More ❯

Platform technologies (Power Automate, Power Pages/Portals). Advanced configuration, customisation, and integration expertise in Dynamics 365 CE. Strong knowledge of integration technologies such as Logic Apps, HTTP, JSON, AJAX, OAuth2. Proficiency in .NET, C#, JavaScript, and related programming languages. Significant experience developing Plugins for Dynamics 365. Strong experience with JavaScript and HTML to enhance Dynamics form customisation. Proven More ❯

AL and AL languages. Knowledge of PowerApps, Power Automate, and Common Data Service (CDS). Database experience with SQL Server, Azure SQL, and MongoDB. Proficiency in REST APIs, SOAP, JSON, XML. Familiarity with Agile and DevOps approaches. Why join Work for a global brand known for offering lots of opportunity for professional development and growth Inclusive, global environment with a More ❯

AL and AL languages. Knowledge of PowerApps, Power Automate, and Common Data Service (CDS). Database experience with SQL Server, Azure SQL, and MongoDB. Proficiency in REST APIs, SOAP, JSON, XML. Familiarity with Agile and DevOps approaches. Why join Work for a global brand known for offering lots of opportunity for professional development and growth Inclusive, global environment with a More ❯

well as experience working with both synchronous and asynchronous endpoints Experience with Snowflake or Redshift with a strong understanding of SQL. Proficient in Python and Pandas Experience working with JSON and XML Strong understanding of cloud computing concepts and services (AWS preferably) Experience with Git or equivalent version control systems and CI/CD pipelines. Familiarity with dbt a plus More ❯

well as experience working with both synchronous and asynchronous endpoints Experience with Snowflake or Redshift with a strong understanding of SQL. Proficient in Python and Pandas Experience working with JSON and XML Strong understanding of cloud computing concepts and services (AWS preferably) Experience with Git or equivalent version control systems and CI/CD pipelines. Familiarity with dbt a plus More ❯

lifecycle from design to governance and management. Working with batch message processing, Salesforce, file, and database connectors. Using MUnit and practising test-driven development. Experience with REST, HTTP, MQ, JSON, XML, and SOA. Familiarity with CI/CD pipelines (Maven, Jenkins, Bitbucket, Git, MuleSoft). Desirable Experience working in consulting or public sector environments. Experience as a microservices developer. MuleSoft More ❯

lifecycle from design to governance and management. Working with batch message processing, Salesforce, file, and database connectors. Using MUnit and practising test-driven development. Experience with REST, HTTP, MQ, JSON, XML, and SOA. Familiarity with CI/CD pipelines (Maven, Jenkins, Bitbucket, Git, MuleSoft). Desirable Experience working in consulting or public sector environments. Experience as a microservices developer. MuleSoft More ❯

pace and scale. The toolkit you’ll use 🌳 Data Science & Engineering: Python (NumPy, Pandas, scikit-learn, PyTorch/TensorFlow), SQL, NoSQL, Spark, big data ecosystems Visualisation & APIs: REST/JSON, Postman, Flask/FastAPI, Power BI/Tableau, D3.js DevOps & Cloud: CI/CD, Docker, AWS (S3, Lambda, SageMaker), Kubernetes, Terraform/CDK ML Ops & Automation: MLFlow, feature stores, model More ❯

pace and scale. The toolkit you’ll use 🌳 Data Science & Engineering: Python (NumPy, Pandas, scikit-learn, PyTorch/TensorFlow), SQL, NoSQL, Spark, big data ecosystems Visualisation & APIs: REST/JSON, Postman, Flask/FastAPI, Power BI/Tableau, D3.js DevOps & Cloud: CI/CD, Docker, AWS (S3, Lambda, SageMaker), Kubernetes, Terraform/CDK ML Ops & Automation: MLFlow, feature stores, model More ❯

ability to present advanced technical topics and deliver tailored demos to different audiences Experience working in middleware technology, ideally within API management, IAM or integration Good knowledge of REST, JSON and XML Some scripting experience, ideally with Java or JavaScript/Python Hands-on experience with cloud providers (AWS, Azure, GCP) Ability to design deployment architectures (HA, DR, etc) Understanding More ❯

principles •Strong JavaScript, TypeScript HTML5, and CSS3 skills •Experience with popular React.js workflows (such as Redux) •Familiarity with RESTful APIs and integration •Knowledge of modern authorization mechanisms, such as JSON Web Tokens •Understanding of front-end build tools and pipelines •Excellent problem-solving and communication skills •A strong attention to detail, and a passion for delivering high-quality code •Adaptability More ❯

principles •Strong JavaScript, TypeScript HTML5, and CSS3 skills •Experience with popular React.js workflows (such as Redux) •Familiarity with RESTful APIs and integration •Knowledge of modern authorization mechanisms, such as JSON Web Tokens •Understanding of front-end build tools and pipelines •Excellent problem-solving and communication skills •A strong attention to detail, and a passion for delivering high-quality code •Adaptability More ❯

Own architecture and technical decisions across squads; accountable for how software is built and shipped. Design and develop distributed, scalable microservices (C# .NET Core or Node.js) and REST/JSON APIs. Build modern React + TypeScript UIs with component-driven design, advanced state management, and reusable frameworks. Leverage AWS services (Lambda, API Gateway, SQS/SNS, Step Functions, S3, IAM More ❯

Key Responsibilities: 8+ years of professional WordPress development experience Deep knowledge of the WordPress + Gutenberg ecosystem and best practices Skilled at building custom blocks, RSS feeds, and WP-JSON API endpoints Strong front-end and back-end chops: HTML, CSS, JS, PHP, and React Confident using Git, branching workflows, and Agile project tools like JIRA Experience leading or delivering More ❯

Key Responsibilities: 8+ years of professional WordPress development experience Deep knowledge of the WordPress + Gutenberg ecosystem and best practices Skilled at building custom blocks, RSS feeds, and WP-JSON API endpoints Strong front-end and back-end chops: HTML, CSS, JS, PHP, and React Confident using Git, branching workflows, and Agile project tools like JIRA Experience leading or delivering More ❯

technology and business projects. Requirements: 2–3 years of experience in a technology role within financial services. Strong SQL scripting skills and experience with MS SQL Server. Familiarity with JSON and XML formats. Understanding of software development lifecycle (SDLC) and Agile methodologies. Experience with incident and change management processes. Excellent analytical and problem-solving skills. Strong communication skills and ability More ❯

technology and business projects. Requirements: 2–3 years of experience in a technology role within financial services. Strong SQL scripting skills and experience with MS SQL Server. Familiarity with JSON and XML formats. Understanding of software development lifecycle (SDLC) and Agile methodologies. Experience with incident and change management processes. Excellent analytical and problem-solving skills. Strong communication skills and ability More ❯

SIEM tools, vulnerability management, malware analysis, and firewall configurations Ability to communicate complex technical solutions to a wide range of audiences, both technical and non-technical Skilled in Python, JSON, YAML, Bash, or other relevant scripting languages 3–5 years of experience in Technical Support, or similar hands-on roles Bachelor’s/Master’s degree in a technical field More ❯

Power Automate Database proficiency - working knowledge of SQL environments using SQL Management Studio API integration - strong understanding of API methods and service integration Data structures - competency with XML and JSON objects Process improvement - solid grasp of workflow automation, process mapping and business process optimisation Compliance knowledge - familiarity with compliance, client onboarding or risk-related workflows Problem-solving skills - exceptional analytical More ❯

Power Automate Database proficiency - working knowledge of SQL environments using SQL Management Studio API integration - strong understanding of API methods and service integration Data structures - competency with XML and JSON objects Process improvement - solid grasp of workflow automation, process mapping and business process optimisation Compliance knowledge - familiarity with compliance, client onboarding or risk-related workflows Problem-solving skills - exceptional analytical More ❯