1 to 25 of 1,015 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 ...

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 ...

team. Essential Skills & Experience Experience developing full stack applications using modern front-end and back-end technologies. Strong programming skills in languages such as JavaScript/TypeScript, Java, C#, Python, or Node.js. Experience with front-end frameworks such as React, Angular, or Vue.js. Experience building and consuming RESTful APIs ...

successful changes, service improvements and platform stability. Essential Skills & Experience Demonstrable experience in software development using C# and .NET. Working knowledge of HTML, CSS, JavaScript or TypeScript, with exposure to a modern front-end framework such as Vue or React. Understanding of APIs and experience consuming or building RESTful services. ...

e.g., PostgreSQL, MySQL) and NoSQL databases (e.g., MongoDB) for data management and optimization. Experience with ETLs and data transformation Solid expertise in HTML, CSS, JavaScript, and ReactJS. Extensive experience with cloud platforms such as AWS including services for database hosting, API management, and serverless computing. Proficiency with Docker for containerization ...

application stack.Strong back-end development experience, ideally using Java, Spring and Spring Boot.A good understanding of modern front-end engineering using technologies such as JavaScript, TypeScript, React or Angular.Experience designing and integrating RESTful APIs and distributed systems.Strong knowledge of software architecture principles, object-oriented design, design patterns and microservices.Experience working ...

Strong back-end development experience, ideally using Java, Spring and Spring Boot. A good understanding of modern front-end engineering using technologies such as JavaScript, TypeScript, React or Angular. Experience designing and integrating RESTful APIs and distributed systems. Strong knowledge of software architecture principles, object-oriented design, design patterns ...

years of professional software engineering experienceStrong experience developing enterprise applications using Java 11+ and related technologiesExtensive experience building modern web applications with React, TypeScript, JavaScript, HTML, and CSSExperience designing, building, and consuming RESTful APIs and distributed servicesStrong understanding of software engineering fundamentals, including data structures, design patterns, and system design ...

Experience Strong software engineering skills across front-end, back-end and data-driven product development. Strong experience developing modern web interfaces using React, TypeScript, JavaScript, HTML and CSS. Experience using component libraries and design systems such as Material UI to build consistent and accessible user interfaces. Experience building back ...

ability to collaborate effectively across teams while supporting technical delivery.Technical Expertise• Strong proficiency in front-end technologies: React/Angular/Vue, HTML5, CSS3, JavaScript/TypeScript• Solid experience in back-end technologies: Node.js/.NET/Java/Python, REST APIs, GraphQL• Strong understanding of databases: SQL (PostgreSQL, MySQL ...

enhancements • Working collaboratively across teams to deliver digital projects and continuous improvements Essential: • Strong commercial experience in software development • Highly proficient in Python, Django, JavaScript, HTML and CSS • Experience with database design and SQL • Strong knowledge of Git and collaborative development workflows • Experience developing with React and/or React ...

enhancements • Working collaboratively across teams to deliver digital projects and continuous improvementsEssential: • Strong commercial experience in software development • Highly proficient in Python, Django, JavaScript, HTML and CSS • Experience with database design and SQL • Strong knowledge of Git and collaborative development workflows • Experience developing with React and/or React Native ...

NoSQL (MongoDB, Cassandra) and performance tuning.Familiarity with messaging systems (Kafka, RabbitMQ) and asynchronous architectures.Strong programming experience in one or more languages (Java, C#, Python, JavaScript/TypeScript, Go) and build tools (Maven, Gradle).Experience implementing test automation strategies, TDD/BDD practices and load testing (JMeter).Practical knowledge of DevOps ...

J2EE and Web Services. Strong understanding of REST APIs, Spring Boot, Micro Services and SOA web services. Expertise with front-end technologies such as JavaScript, TypeScript, Angular, and/or ReactJS.Proficiency in SQL, including query writing, stored procedures, and basic data modeling. Strong experience with modern testing frameworks, including unit ...

using Java, J2EE and Web Services.Strong understanding of REST APIs, Spring Boot, Micro Services and SOA web services.Expertise with front-end technologies such as JavaScript, TypeScript, Angular, and/or ReactJS.Proficiency in SQL, including query writing, stored procedures, and basic data modeling.Strong experience with modern testing frameworks, including unit ...

tools (e.g. Jenkins, GitHub Actions, Azure DevOps) Experience working in a regulated industry (e.g. financial services, insurance, healthcare) Familiarity with front-end basics (JavaScript, HTML/CSS) for full-stack contributions Knowledge of software security best practices Along with our client, we are committed to a diverse workforce ...

experience you'll bring:Extensive experience as a Senior QE SDET Engineer or Senior DeveloperHas breadth of experience across different tech-stacks, such as JavaScript/TypeScript, Java, C#, or Python, amongst othersExperienced in RAG Weaviate, OpenAI, Agents, MCP, Langchain, Prompt Engineering, Browser-Use, and DjangoExperienced building AI Tools, Agents ...

designing and developing solutions utilising most of the following technologies:• Strong front end web development experience with Angular or React (we use Angular), Typescript, JavaScript, HTML/CSS with an eye for good UX• Experience in designing and building distributed systems using Microsoft C#, .NET Core and Web API• Experience ...

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 ...

/equivalentProven years of experience in software development working with the following:C# preferred;SQL databases (e.g. SQL Server);Front-end technologies (HTML5, CSS, JavaScript frameworks – Angular preferred);Cloud services (Azure preferred);Experience with GenAI development tools such as Co-Pilot,Experience developing multi-layered products as a full stack ...

development experience building enterprise web applications and services, ideally including payroll, compensation, equity, HR, finance, or tax domains. Strong experience designing and building large JavaScript applications with Next.js and/or React (TypeScript, state management, performance optimization). Strong backend development experience in C# and .NET (ASP.NET, WebAPI, MVC) including ...

like JFrog, Nexus, etc.Good understanding on Containerisation solutions, e.g., K8, Docker, Kaniko, etc.Proficiency in at least one of the standard programming languages – Java/JavaScript, C#, Python, or similar Object-oriented programmingProficiency in at least one of the standard scripting languages – Terraform, Bash, Ansible, etc.Good understanding of Software engineering concepts ...

engineering practices like Code Reviews, CI/CD Pipelines and SOLID/DRY principalsHands-on developing/coding role using the following technologies:Frontend (JavaScript/TypeScript or Angular or React or Node)Backend (Java, SpringBoot, Hibernate, Kotlin)Experience in estimation and sizingIntegration experienceAPI Design experienceCloud experienceAppetite to work with ...

practices like Code Reviews, CI/CD Pipelines and SOLID/DRY principals Hands-on developing/coding role using the following technologies: Frontend (JavaScript/TypeScript or Angular or React or Node) Backend (Java, SpringBoot, Hibernate, Kotlin) Experience in estimation and sizing Integration experience API Design experience Cloud experience ...

practices like Code Reviews, CI/CD Pipelines and SOLID/DRY principals Hands-on developing/coding role using the following technologies: Frontend (JavaScript/TypeScript or Angular or React or Node) Backend (Java, SpringBoot, Hibernate, Kotlin) Experience in estimation and sizing Integration experience API Design experience Cloud experience ...