1 to 25 of 300 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 ...

mentoring others, and improving the resilience and security of live systems. Key experience Strong backend development in two or more languages (Python, Node.js/JavaScript, Ruby) End-to-end full stack experience including modern frontend frameworks and accessibility standards Experience building cloud-hosted services (AWS, serverless/FaaS) Containerisation ...

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 ...

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 ...

form of IaC, CI/CD and test automation. Extra info: Expert knowledge of current Java. Proficient in another language such as Python, C++, JavaScript, TypeScript, React. Advanced knowledge of AWS Services such as EC2, EKS, Fargate, IAM, S3, Lambda. Advanced knowledge of CI/CD software pipelines for Cloud ...

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/ ...

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 ...

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/ ...

years commercial experience in a Cloud/Platform/DevOps/Infrastructure Engineering role Commercial experience with AWS Strong scripting or programming ability (Python, JavaScript, Java or .NET) Experience with version control systems such as Git Hands-on experience with CI/CD tooling (e.g. Jenkins, Bamboo, TeamCity, Bitbucket pipelines ...

SENIOR SOFTWARE ENGINEER TO HAVE.... Current enhanced DV clearance Experience with at least one or more of the following: Java, Python, C++, .NET, C#, JavaScript, React Experience mentoring juniors or leading a team Experience/Knowledge of automation IT WOULD BE NICE FOR THE SENIOR SOFTWARE ENGINEER TO HAVE.... Cloud ...

tools and techniques Key Skills: Cloud platforms (GCP preferred) Containers & serverless (Kubernetes, Docker, Functions) Data & analytics tools (SQL, distributed data systems) Languages: Java, Python, JavaScript CI/CD & tooling (eg Jenkins or similar What You'll Get Competitive salary + performance bonus Private medical insurance Pension scheme 25 days holiday ...

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 ...

Python (Django, Flask, or FastAPI) PostgreSQL (design, optimisation, maintenance) Containerisation (Docker/Kubernetes) Event-driven architecture (Kafka/RabbitMQ) Desirable experience includes: TypeScript/JavaScript (NextJS, NodeJS, Tailwind) Terraform and DevOps practices Experience in building and scaling SaaS platforms in production. Strong background in software architecture, microservices, and API design. ...

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 ...

Senior Software Engineer Key Technologies: C#, .NET, React, JavaScript, Typescript, AWS, Docker City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Financial Services Vendor and they are looking for a Senior C#, .NET Software Engineer to join their growing team! This ...

Technical Lead or Senior engineer Strong software engineering and system design background Experience delivering enterprise applications on AWS, Azure or GCP Proficiency in JavaScript, Java or .NET Agile delivery experience (Scrum/Kanban) Knowledge of DevOps, CI/CD, infrastructure-as-code and modern testing practices Strong communication and stakeholder ...

Technical Lead or Senior engineer Strong software engineering and system design background Experience delivering enterprise applications on AWS, Azure or GCP Proficiency in JavaScript, Java or .NET Agile delivery experience (Scrum/Kanban) Knowledge of DevOps, CI/CD, infrastructure-as-code and modern testing practices Strong communication and stakeholder ...

high-quality code through testing and TDD practices. Assist in the transition towards highly automated, data-driven lending processes. Requirements Proficiency in TypeScript and JavaScript . Strong experience with React and Next.js. Experience using Node.js. Proven ability in UI development and CSS styling libraries. Working knowledge of RESTful APIs ...

build and communicate effectively. You should be comfortable writing solid code, explaining decisions clearly, asking the right questions, and collaborating with others. Technical stack JavaScript/TypeScript React.js Node.js with Express.js Next.js Tailwind CSS PostgreSQL Key responsibilities Collaborate with product and internal stakeholders to design, build, and deliver new features ...

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 ...