1 to 25 of 34 Contract ECMAScript Jobs in London

Experience with FastAPI , Flask , or Django REST API and Microservices development Object-Oriented Programming (OOP) SQL and database design Frontend Strong knowledge of React.js JavaScript (ES6+), TypeScript HTML5, CSS3 Redux, React Hooks Responsive UI development Databases PostgreSQL, MySQL, SQL Server MongoDB (preferred) Cloud & DevOps AWS, Azure, or GCP Docker ...

customers to build high-quality solutions using Angular and .NET technologies. Key Skills Required Strong commercial experience with Angular Good knowledge of TypeScript, JavaScript, HTML and CSS Experience integrating with REST APIs Solid .NET/ASP.NET Core experience Experience with automated testing tools such as Playwright, Vitest, Cypress or Jest ...

following: Dynamics 365 CE/CRM development Plugins, workflows and custom APIs Dynamics 365 configuration and customisation C# .NET Framework/.NET Core JavaScript, TypeScript, HTML and CSS Web APIs and integration services Azure Functions Azure Logic Apps Azure Service Bus Azure API Management Azure DevOps Git source control REST ...

GitHub Copilot Claude Code OpenAI GPT/Azure OpenAI Anthropic Claude APIs Agentic AI LangChain LangGraph CrewAI Software Engineering Strong development experience with Python, JavaScript/TypeScript, C# or Java REST APIs and microservices Software architecture and engineering best practices Desirable Skills Experience with any of the following would ...

Platform Technologies AWS SageMaker Python scripting and automation Container orchestration platforms Infrastructure security and hardening Cloud networking and connectivity Application Support Knowledge C# .NET JavaScript React REST APIs Microservices architecture COTS Product Experience Supporting Commercial Off-The-Shelf products within secure environments Troubleshooting intelligence, analytical or partner-provided systems Exposure ...

request and work in an environment with some levels of governance Must have: Web applications expertise using modern web technologies (e.g. CSS, HTML, HTML5, JavaScript, jQuery). Knowledge in UX design principles and ability to apply them when building applications/solutions. Knowledge in database modelling and SQL programming (e.g. ...

across the full lifecycle Hands-on expertise with Microsoft-based environments (e.g. Azure testing tools, AI platforms) Proficiency in one or more: Python, Java, JavaScript, SQL, or R Proven experience in: AI/Generative AI testing RAG (Retrieval-Augmented Generation) solution validation (e.g. RAGAS framework) CI/CD, DevOps ...

large, complex organisation Ability to work onsite 4 days per week Technical expertise in Python (Django, Flask frameworks) Demonstrable skills in React, JavaScript (Vanilla) and Node.js Working knowledge of API integration and workflow automation SQL (Database Management) and Data Integration skills Azure Cloud deployment YAML pipeline experience Familiarity with Azure ...

Server, TSQL, SSIS, SSRS. Familiarity with Git/Bitbucket and job scheduling tools like Autosys. Experience with front-end technologies such as Angular, JavaScript, and ASP.NET MVC is a plus. Strong analytical and problem-solving skills with meticulous attention to detail. Excellent communication and interpersonal skills; able to effectively collaborate ...

protocols Must have (technical): * In-depth understanding of modern cloud infrastructure * A track record of delivering complex software projects using AWS technologies * Competency in JavaScript/TypeScript and/or Python * Practical experience of: - Databases: NoSQL and RDBMS - Compute: AWS Lambda, containers and orchestration (EC2, Fargate, Kubernetes etc.) - Messaging/ ...

Bring Proven experience developing within Microsoft Dynamics 365 (CE/CRM). Strong skills in Power Apps, Power Automate, and Dataverse. Proficiency in C#, JavaScript, and Dynamics SDK/custom connectors. Understanding of Azure functions, APIs, and integration patterns. Experience working in agile, multidisciplinary environments. Awareness of government data ...

teams in an Agile environment. Key Requirements Strong React development experience Adobe Experience Manager (AEM) expertise, including HTL/Sightly, Clientlibs and component development JavaScript (ES6), HTML5, CSS3, SASS/LESS and Node.js Responsive, accessible and performance-focused web development Knowledge of WCAG accessibility standards and secure coding practices Experience ...

playout environments. - Knowledge of media formats, codecs and content workflows. - Experience with event-driven architectures and Agile delivery practices. - Hands-on programming capability in JavaScript/TypeScript and/or Python. - Strong understanding of AWS services including: * Lambda and container-based compute platforms * Kubernetes, ECS/Fargate or similar orchestration ...

team. Experience Needed: Proven experience in web application support, ideally within the financial or corporate settings. Strong understanding of web technologies, including HTML, CSS, JavaScript, C# and relevant frameworks. Familiarity with server environments and database management systems. Excellent problem-solving skills and the ability to work under pressure. Strong communication ...

Back End technologies, API gateway configuration and GitOps-based delivery. Banking or financial services experience is essential. Key Skills & Experience Required Strong TypeScript and JavaScript development experience Hands-on experience building applications using React.js and Next.js Backend development experience with Python, Golang or Java Experience building schema-driven ...

join their team. The role will be working development and implementation of applications used across trading. Requirements Java, Springboot, Microservices UI - Angular, Typescript, JavaScript - (open to react also) Kafka, MQ, FIX Protocol Investment Banking or Investment Management experience. AI Driven Development tools, Claude Code, Github Code, Windsurf etc Contract ...

Outside IR35 London/Hybrid - 2x days a week in London Design and develop automated testing frameworks and strategies with Cypress and Playwright using Javascript/Typescript. Create and maintain test scripts utilising WebDriver, Selenium, Gherkin, and Cucumber Performance testing using JMeter Write clear and concise test cases and scenarios ...

Developer Commercial experience developing solutions using Power Apps and Power Automate. Experience with Dataverse and Power Platform governance concepts. Understanding of Power FX, JSON, JavaScript, and system integration principles. Exposure to Power Automate Desktop, Copilot Studio, or similar automation technologies. Familiarity with Microsoft 365 and Azure environments. Strong problem-solving ...

hands-on engineer with strong Python development experience, Bloomberg expertise, and a solid understanding of investment data and financial markets. Key Skills Python Bloomberg JavaScript React Responsibilities Develop, enhance, and maintain investment applications supporting portfolio management and risk functions. Deliver system updates and enhancements across Bloomberg environments. Support and maintain ...

with very likely extension Location - Hybrid/Canary Wharf - 3 days per week in a Canary Wharf office Tech Stack Copilot Powerapps Power platform Javascript Role Development and support of low code Business applications using Power platform, M365, C#, JavaScript. You will collaborate closely with business analysts, business users ...

practices. Support CI/CD processes and ensure robust testing standards. Requirements Proven experience developing mobile applications with React Native . Strong knowledge of JavaScript/TypeScript . Experience integrating APIs and backend services. Understanding of mobile application architecture, performance optimisation, and security best practices. Experience working within Agile delivery ...

experience as an Information Security Researcher or Engineer 3+ years' experience manually auditing source code, or strong programming skills in Java, .NET, Python, or JavaScript frameworks Strong understanding of OWASP Top 10, API security risks, and cloud-native application architecture Proven experience in application penetration testing and security code review ...

design and management of APIs. Strong knowledge of REST/SOAP APIs, JSON/XML, and SQL databases. Experience with Groovy and/or JavaScript, as well as integration patterns, troubleshooting and enterprise integration environments. Location: London or Birmingham Working Model: Initially 5 days onsite per week. ...

workflows, integrations, automation and platform enhancements. Key skills: 7+ years' hands-on ServiceNow development experience Strong ITSM, Service Catalog, Flow Designer, IntegrationHub & CMDB Advanced JavaScript, Glide APIs, Business Rules & Script Includes Extensive REST/SOAP API, OAuth, JSON/XML & MID Server experience Strong enterprise integration and workflow automation experience ...

hands-on ServiceNow development Strong commercial experience with HRSD/HR Service Delivery HR Case Management, HR Services, COEs and employee lifecycle processes Strong JavaScript ServiceNow ATF/Automated Test Framework Flow Designer, ACLs, Business Rules and Service Catalog Experience working within Agile delivery teams Desirable ...