1 to 25 of 261 ECMAScript Jobs in London

software development experience, with at least 3 years in a senior or technical lead role. Proven expertise in full-stack development using: TypeScript (and JavaScript frameworks such as NextJS, Node, or Tailwind) Python (including frameworks like Django, Flask, or FastAPI) PostgreSQL and relational database design, optimization, and maintenance. AI Development ...

from the roadmap. Solve ambiguous problems with scalable solutions. Skills Knowledge and Expertise Essential: Strong expertise in Python web development frameworks (e.g., Django) and JavaScript/TypeScript, with experience working in cloud environments such as AWS, Azure, or GCP. Skilled in applying software technical design principles to build scalable, secure ...

Redux desirable) Node.js & Express.js MongoDB (schema design, aggregation pipelines, indexing) Experience with RESTful APIs, GraphQL (preferred), and microservices architecture. Solid understanding of HTML5, CSS3, JavaScript (ES6+). Strong knowledge of Git, CI/CD pipelines, unit testing frameworks (Jest, Mocha, etc.). Experience deploying applications on Azure, AWS, or GCP. ...

clearance . Significant experience in Agile environments (e.g., SCRUM, Kanban). Solid technical development background with strong coding skills in Java, C#, TypeScript, JavaScript , or similar. Strong knowledge of integration testing and automation frameworks . Experience leading small teams of testers and contributing to the overall QA strategy . Knowledge ...

Server Experience designing and consuming RESTful APIs/REST API services Proficiency in at least two of the following programming languages: Python Java JavaScript .NET (C#) Experience working in Agile/Scrum environments Excellent problem-solving skills and attention to detail Desirable Skills Experience with cloud platforms (Oracle Cloud ...

Writing clean, testable, maintainable code Participating in code reviews, pairing, and team delivery Tech Stack & Environment Backend: Scala, Java (Python desirable) Frontend: HTML, CSS, JavaScript Frameworks: Play, Spark Data: Postgres, MongoDB, Hudi Cloud: AWS (S3, ECS, Aurora, Lambda) DevOps: Jenkins, Airflow, Terraform Monitoring: Kibana, Grafana Ways of working: Agile (Scrum ...

Event Grid, SQL, Cosmos DB) Deliver secure, scalable, cloud-native solutions Key Skill Strong full stack development experience Expertise in React + modern JavaScript Backend development with .NET or Python Hands-on Azure experience Knowledge of APIs, microservices, Docker, Kubernetes Preferred CI/CD, Terraform/ARM Azure Functions ...

Event Grid, SQL, Cosmos DB) Deliver secure, scalable, cloud-native solutions Key Skill Strong full stack development experience Expertise in React + modern JavaScript Backend development with .NET or Python Hands-on Azure experience Knowledge of APIs, microservices, Docker, Kubernetes Preferred CI/CD, Terraform/ARM Azure Functions ...

Azure Integration Services (APIM, Logic Apps, Azure Functions, Service Bus, Event Grid) Experience delivering containerised workloads in AKS Strong programming capability in C#, .NET, JavaScript or TypeScript Solid understanding of REST APIs, OAuth2 and modern API security practices Experience with SQL and data integration technologies Familiarity with CI/ ...

application development (.NET Core, C#) or winforms/WPF (C#) development. Our client will provide you with training into: .NET 10.0, WPF, MVVM, Prism, JavaScript, React, Angular 21, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, ASP.NET Core Web API, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and Azure SQL. ...

such as Sitecore, Optimizely, Umbraco, Alterian, Immediacy, Ektron, Kentico, Sitefinity or dotnetnuke. Our client can provide you with industry recognised training in: .NET 10.0, JavaScript, React, Angular 21, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, ASP.NET Core Web API, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB. This ...

Umbraco, Alterian, Immediacy, Ektron, Kentico, Sitefinity or DotNetNuke. Our client is passionate about continuous learning and will provide industry-recognised training in: .NET 10.0, JavaScript, React, Angular 21, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, ASP.NET Core Web API, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum and Kanban. This ...

using TypeScript, leveraging frameworks such as Next.js or Vite. GenAI Frameworks: Familiarity with tools like LangChain, LangGraph, CrewAI, or Vercel AI (in Python or JavaScript). LLM experience: Practical experience with Large Language Models (LLMs) such as OpenAI, Anthropic, Mistral, or Llama, and tools like Ollama. Cloud Platforms: Proficiency ...

related field 5+ years of experience in frontend/UI engineering, with a focus on performance and scale Deep expertise in React, TypeScript, and JavaScript Strong understanding of WebSocket integration, low-latency data streaming, and threading Experience troubleshooting data-heavy UIs and optimising load times Familiarity with tools like Redis ...

Infrastructure as Code (IaC), CI/CD and test automation Skills & Experience: Strong proficiency in Java Knowledge of additional languages such as Python, C++, JavaScript, TypeScript or React (desirable) Experience developing software for cloud environments, particularly AWS Understanding of microservices and/or serverless architectures Familiarity with CI/ ...

Significant experience as a Senior Software Engineer or equivalent. Deep expertise in at least one of: Modern web/front-end engineering (TypeScript/JavaScript frameworks) React Native Android (Kotlin) iOS (Swift) Java/AWS backend engineering and distributed systems Demonstrated ability to work across multiple parts of the stack. ...

using TypeScript, leveraging frameworks such as Next.js or Vite. GenAI Frameworks: Familiarity with tools like LangChain, LangGraph, CrewAI, or Vercel AI (in Python or JavaScript). LLM experience: Practical experience with Large Language Models (LLMs) such as OpenAI, Anthropic, Mistral, or Llama, and tools like Ollama. Cloud Platforms: Proficiency ...

using TypeScript, leveraging frameworks such as Next.js or Vite. GenAI Frameworks: Familiarity with tools like LangChain, LangGraph, CrewAI, or Vercel AI (in Python or JavaScript). LLM experience: Practical experience with Large Language Models (LLMs) such as OpenAI, Anthropic, Mistral, or Llama, and tools like Ollama. Cloud Platforms: Proficiency ...

remotely Collaborate with product and engineering teams to improve deployments Support rollout projects and large-scale implementations Requirements: Strong software engineering skills (Python, JavaScript, or similar) Experience with cloud platforms (AWS, Azure, GCP) Knowledge of APIs, system integration, and microservices Client-facing experience or delivery-focused roles Strong problem-solving ...

life sciences), or equivalent experience Cloud experience (e.g. Google Cloud and cloud run preferred) including core web application infrastructure is essential Strong skills in JavaScript/TypeScript and Python, ensuring best practices are followed for clean and scalable code Demonstrated ability to work directly with designers, particularly using Figma ...

life sciences), or equivalent experience Cloud experience (e.g. Google Cloud and cloud run preferred) including core web application infrastructure is essential Strong skills in JavaScript/TypeScript and Python, ensuring best practices are followed for clean and scalable code Demonstrated ability to work directly with designers, particularly using Figma ...

scale ESSENTIAL REQUIREMENTS Proven experience working as part of a fast-paced development team delivering incremental value Front-end skills across HTML5, CSS3, JavaScript, Bootstrap, Vue.js and Blazor Server-side development using ASP.NET, C#, and .NET Core Database knowledge with emphasis on Microsoft SQL Server and Entity Framework Core Experience ...

expected to work with the following core technologies; however, it is not expected that they will have prior experience of them all: Programming: Python, JavaScript, TypeScript, SQL, C#, C++ Frameworks & Tools: FastAPI, Jupyter, JupyterHub, Voila, Power BI, GitHub, Vue, Nuxt AEC Platforms & Standards: Revit, Revit API, pyRevit, Rhino, Grasshopper ...

quality assurance engineer, software tester, or similar role with expertise in manual and automated testing. Proficiency in programming languages like Python, or JavaScript/TypeScript to build and run automated test scripts. Strong knowledge of software testing methodologies, tools (Selenium, JUnit, TestNG), and frameworks. Experience with bug tracking and project ...

move forward. Step 2 - Online Training The second step includes a selection of more advanced courses to get you up to speed. React-js JavaScript JavaScript forms the foundation of almost everything you see on the Internet, so it will be essential! Python is highly versatile. ...