676 to 700 of 1,251 ECMAScript Jobs in London

to ensure smooth delivery. Key Skills & Experience 5+ years' experience in QA or software support. Strong knowledge of Agile methodologies and the software development lifecycle. Experience with automated testing (JavaScript/TypeScript), Playwright, and source control tools. Excellent analytical, communication, and problem-solving skills. ISTQB certification, performance testing, and client support experience are advantageous. Everybody is Welcome Diversity and Inclusion More ❯

to ensure smooth delivery. Key Skills & Experience 5+ years' experience in QA or software support. Strong knowledge of Agile methodologies and the software development lifecycle. Experience with automated testing (JavaScript/TypeScript), Playwright, and source control tools. Excellent analytical, communication, and problem-solving skills. ISTQB certification, performance testing, and client support experience are advantageous. Everybody is Welcome Diversity and Inclusion More ❯

solutions for complex customer problems raised and assist teams in moving changes to production. KeyRequirements Professional software development experience Professional experience in Java and/or Scala Experience with JavaScript preferred Experience of contributing to the architecture and design (architecture, design patterns, reliability, and scaling) of new and current systems PreferredQualifications Experience with Postgres and MongoDB Knowledge of Ansible, Redux More ❯

and over the phone) Understanding of SQL and generating simple queries Knowledge of HTML and at least two of the following technologies; PHP, Perl, JAVA, JSP/JSF, Ruby, Javascript or ASP.Net Excellent analysis, troubleshooting and debugging skills, in particular with web workflow and websites Ability to handle a wide variety of sometimes demanding and complex issues SDK/Mobile More ❯

and over the phone) Understanding of SQL and generating simple queries Knowledge of HTML and at least two of the following technologies; PHP, Perl, JAVA, JSP/JSF, Ruby, Javascript or ASP.Net Excellent analysis, troubleshooting and debugging skills, in particular with web workflow and websites Ability to handle a wide variety of sometimes demanding and complex issues SDK/Mobile More ❯

and over the phone) Understanding of SQL and generating simple queries Knowledge of HTML and at least two of the following technologies; PHP, Perl, JAVA, JSP/JSF, Ruby, Javascript or ASP.Net Excellent analysis, troubleshooting and debugging skills, in particular with web workflow and websites Ability to handle a wide variety of sometimes demanding and complex issues SDK/Mobile More ❯

and over the phone) Understanding of SQL and generating simple queries Knowledge of HTML and at least two of the following technologies; PHP, Perl, JAVA, JSP/JSF, Ruby, Javascript or ASP.Net Excellent analysis, troubleshooting and debugging skills, in particular with web workflow and websites Ability to handle a wide variety of sometimes demanding and complex issues SDK/Mobile More ❯

Able to commit to a 10week internship from the 22nd of June 2026until the 28th of August 2026 Knowledge ofcomputer science fundamentals and any major programming languages(Java/JavaScript/Python/Kotlin/Swift) Ability to explain complex concepts to diverse audiences Commitment to best coding practices and code reviews Basic knowledge of modern web technologies and astrong More ❯

Deep knowledge of the HTML Canvas API, Web Workers, and virtualization techniques. Visualization: Experience building dynamic, query-driven visualization systems (D3.js or equivalent). Asynchronous state management: Mastery of JavaScript concurrency and experience with libraries such as TanStack Query or SWR. Modern frameworks: Several years of experience with React or Vue, including advanced state management (Zustand, Redux, Pinia). TypeScript More ❯

Deep knowledge of the HTML Canvas API, Web Workers, and virtualization techniques. Visualization: Experience building dynamic, query-driven visualization systems (D3.js or equivalent). Asynchronous state management: Mastery of JavaScript concurrency and experience with libraries such as TanStack Query or SWR. Modern frameworks: Several years of experience with React or Vue, including advanced state management (Zustand, Redux, Pinia). TypeScript More ❯

Deep knowledge of the HTML Canvas API, Web Workers, and virtualization techniques. Visualization: Experience building dynamic, query-driven visualization systems (D3.js or equivalent). Asynchronous state management: Mastery of JavaScript concurrency and experience with libraries such as TanStack Query or SWR. Modern frameworks: Several years of experience with React or Vue, including advanced state management (Zustand, Redux, Pinia). TypeScript More ❯

Deep knowledge of the HTML Canvas API, Web Workers, and virtualization techniques. Visualization: Experience building dynamic, query-driven visualization systems (D3.js or equivalent). Asynchronous state management: Mastery of JavaScript concurrency and experience with libraries such as TanStack Query or SWR. Modern frameworks: Several years of experience with React or Vue, including advanced state management (Zustand, Redux, Pinia). TypeScript More ❯

Java 11+ and practical knowledge of SQL (DB2, SQL Server, or Postgres). Strong understanding of design patterns, microservices architecture, RESTful APIs . Some capability in front-end development (JavaScript, React, Node.js, HTML, CSS). Comfortable working in an Agile engineering environment , familiar with build tools, static/dynamic code analysis , and CI/CD pipelines (e.g., Jenkins, TeamCity). … or equivalent professional experience). Desirable Skills Experience with Elastic (ELK) stack , Docker/Kubernetes , or test automation tools such as Cucumber/Selenium . Exposure to client-side JavaScript frameworks and UI/UX collaboration is advantageous. Keywords: Java Developer, Software Engineer, Java 11+, Agile, Banking, Financial Services, Microservices, RESTful APIs, CI/CD, Scrum, Kanban, BDD, Gherkin, React More ❯

Java 11+ and practical knowledge of SQL (DB2, SQL Server, or Postgres). Strong understanding of design patterns, microservices architecture, RESTful APIs . Some capability in front-end development (JavaScript, React, Node.js, HTML, CSS). Comfortable working in an Agile engineering environment , familiar with build tools, static/dynamic code analysis , and CI/CD pipelines (e.g., Jenkins, TeamCity). … or equivalent professional experience). Desirable Skills Experience with Elastic (ELK) stack , Docker/Kubernetes , or test automation tools such as Cucumber/Selenium . Exposure to client-side JavaScript frameworks and UI/UX collaboration is advantageous. Keywords: Java Developer, Software Engineer, Java 11+, Agile, Banking, Financial Services, Microservices, RESTful APIs, CI/CD, Scrum, Kanban, BDD, Gherkin, React More ❯

Java 11+ and practical knowledge of SQL (DB2, SQL Server, or Postgres). Strong understanding of design patterns, microservices architecture, RESTful APIs . Some capability in front-end development (JavaScript, React, Node.js, HTML, CSS). Comfortable working in an Agile engineering environment , familiar with build tools, static/dynamic code analysis , and CI/CD pipelines (e.g., Jenkins, TeamCity). … or equivalent professional experience). Desirable Skills Experience with Elastic (ELK) stack , Docker/Kubernetes , or test automation tools such as Cucumber/Selenium . Exposure to client-side JavaScript frameworks and UI/UX collaboration is advantageous. Keywords: Java Developer, Software Engineer, Java 11+, Agile, Banking, Financial Services, Microservices, RESTful APIs, CI/CD, Scrum, Kanban, BDD, Gherkin, React More ❯

Java 11+ and practical knowledge of SQL (DB2, SQL Server, or Postgres). Strong understanding of design patterns, microservices architecture, RESTful APIs . Some capability in front-end development (JavaScript, React, Node.js, HTML, CSS). Comfortable working in an Agile engineering environment , familiar with build tools, static/dynamic code analysis , and CI/CD pipelines (e.g., Jenkins, TeamCity). … or equivalent professional experience). Desirable Skills Experience with Elastic (ELK) stack , Docker/Kubernetes , or test automation tools such as Cucumber/Selenium . Exposure to client-side JavaScript frameworks and UI/UX collaboration is advantageous. Keywords: Java Developer, Software Engineer, Java 11+, Agile, Banking, Financial Services, Microservices, RESTful APIs, CI/CD, Scrum, Kanban, BDD, Gherkin, React More ❯

.NET Developer, .NET 9, C#, Azure, JavaScript, Agile - London (Tech stack: .NET Developer, .NET 9, ASP.NET, C#, React, Angular 19, Microservices, Vue.js, TypeScript, Azure, Web API 2, Agile, Azure SQL, Programmer, Full Stack Engineer, Architect, .NET Developer, Urgent)Be the first of your friends to declare, "I love where I work!" and actually mean it. Laugh hard and work hard … Developer candidates should have strong experience with: .NET, .NET Core/ASP.NET MVC, C# and Azure SQL. Our client will provide you with industry recognised training into: .NET 9, JavaScript, React, Angular 19, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, Web API 2, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB. Their benefits include the following: Bonus More ❯

and scalability, this is your opportunity to make an impact! Your Role: Designing, developing, and maintaining both front-end and back-end components of web and mobile applications using JavaScript, Node.js, and modern frameworks and libraries, with strong Angular JS , and others such as React, or Vue.js. Collaborating with architects and other developers to design robust, scalable, and secure architectures … Staying up to date with the latest industry trends and technologies and drive continuous learning and innovation within the team. Your skills and experience Proven experience in full stack JavaScript development, with a strong focus on Angular JS Experience of at least one leading Node framework (Express.js, Nest.js, Hapi.js) Expertise in at least one modern front-end framework (Nest.js, Remix.js … . Proficiency in HTML5, CSS3, and JavaScript (ES6+). Experience with TypeScript and modern development tools and practices. Experience of Test Driven or Behaviour Driven Development. Knowledge of Cloud development and serverless architectures (AWS, Azure, Google Cloud). Familiarity with CI/CD pipelines and DevOps practices. If you’re ready to take the next step in your career and More ❯

and scalability, this is your opportunity to make an impact! Your Role: Designing, developing, and maintaining both front-end and back-end components of web and mobile applications using JavaScript, Node.js, and modern frameworks and libraries, with strong Angular JS , and others such as React, or Vue.js. Collaborating with architects and other developers to design robust, scalable, and secure architectures … Staying up to date with the latest industry trends and technologies and drive continuous learning and innovation within the team. Your skills and experience Proven experience in full stack JavaScript development, with a strong focus on Angular JS Experience of at least one leading Node framework (Express.js, Nest.js, Hapi.js) Expertise in at least one modern front-end framework (Nest.js, Remix.js … . Proficiency in HTML5, CSS3, and JavaScript (ES6+). Experience with TypeScript and modern development tools and practices. Experience of Test Driven or Behaviour Driven Development. Knowledge of Cloud development and serverless architectures (AWS, Azure, Google Cloud). Familiarity with CI/CD pipelines and DevOps practices. If you’re ready to take the next step in your career and More ❯

and scalability, this is your opportunity to make an impact! Your Role: Designing, developing, and maintaining both front-end and back-end components of web and mobile applications using JavaScript, Node.js, and modern frameworks and libraries, with strong Angular JS , and others such as React, or Vue.js. Collaborating with architects and other developers to design robust, scalable, and secure architectures … Staying up to date with the latest industry trends and technologies and drive continuous learning and innovation within the team. Your skills and experience Proven experience in full stack JavaScript development, with a strong focus on Angular JS Experience of at least one leading Node framework (Express.js, Nest.js, Hapi.js) Expertise in at least one modern front-end framework (Nest.js, Remix.js … . Proficiency in HTML5, CSS3, and JavaScript (ES6+). Experience with TypeScript and modern development tools and practices. Experience of Test Driven or Behaviour Driven Development. Knowledge of Cloud development and serverless architectures (AWS, Azure, Google Cloud). Familiarity with CI/CD pipelines and DevOps practices. If you’re ready to take the next step in your career and More ❯

and scalability, this is your opportunity to make an impact! Your Role: Designing, developing, and maintaining both front-end and back-end components of web and mobile applications using JavaScript, Node.js, and modern frameworks and libraries, with strong Angular JS , and others such as React, or Vue.js. Collaborating with architects and other developers to design robust, scalable, and secure architectures … Staying up to date with the latest industry trends and technologies and drive continuous learning and innovation within the team. Your skills and experience Proven experience in full stack JavaScript development, with a strong focus on Angular JS Experience of at least one leading Node framework (Express.js, Nest.js, Hapi.js) Expertise in at least one modern front-end framework (Nest.js, Remix.js … . Proficiency in HTML5, CSS3, and JavaScript (ES6+). Experience with TypeScript and modern development tools and practices. Experience of Test Driven or Behaviour Driven Development. Knowledge of Cloud development and serverless architectures (AWS, Azure, Google Cloud). Familiarity with CI/CD pipelines and DevOps practices. If you’re ready to take the next step in your career and More ❯

Senior Full Stack Software Engineer Tech : AWS, NodeJS, TypeScript, JavaScript, ReactJS, React Native Why? start-up financial services, revolutionising the industry Location : Hybrid - 1/2 days in the office (Central London) Our Client A new UK-based financial services provider is launching credit card, personal loans and insurance offerings aimed at delivering fair, flexible, and user-friendly financial products … similar role with a strong portfolio of projects. Expertise in Node.js and AWS Lambda for serverless backend services. Proficiency in React with Next.js for frontend development. Proficiency in TypeScript, JavaScript and experience with infrastructure as code using Terraform. Beneficial experience of React Native Understanding of RESTful APIs and web application architecture. Experience in a start-up environment. Bachelor’s or … Master’s degree in Computer Science, Engineering, or a related field, or equivalent experience. Familiarity with RESTful APIs and mobile libraries for networking. Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model. Experience with automated testing suites, like Jest or Mocha. Excellent problem-solving skills and the ability to think algorithmically. Experience with cloud message APIs and More ❯

Senior Full Stack Software Developer Tech : AWS, NodeJS, TypeScript, JavaScript, ReactJS, React Native Why? start-up financial services, revolutionising the industry Location : Hybrid - 1/2 days in the office (Central London) Our Client A new UK-based financial services provider is launching credit card, personal loans and insurance offerings aimed at delivering fair, flexible, and user-friendly financial products … similar role with a strong portfolio of projects. Expertise in Node.js and AWS Lambda for serverless backend services. Proficiency in React with Next.js for frontend development. Proficiency in TypeScript, JavaScript and experience with infrastructure as code using Terraform. Ideal experience with React Native Understanding of RESTful APIs and web application architecture. Experience in a start-up environment. Bachelor’s or … Master’s degree in Computer Science, Engineering, or a related field, or equivalent experience. Familiarity with RESTful APIs and mobile libraries for networking. Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model. Experience with automated testing suites, like Jest or Mocha. Excellent problem-solving skills and the ability to think algorithmically. Experience with cloud message APIs and More ❯

Senior Full Stack Software Engineer Tech : AWS, NodeJS, TypeScript, JavaScript, ReactJS, React Native Why? start-up financial services, revolutionising the industry Location : Hybrid - 1/2 days in the office (Central London) Our Client A new UK-based financial services provider is launching credit card, personal loans and insurance offerings aimed at delivering fair, flexible, and user-friendly financial products … similar role with a strong portfolio of projects. Expertise in Node.js and AWS Lambda for serverless backend services. Proficiency in React with Next.js for frontend development. Proficiency in TypeScript, JavaScript and experience with infrastructure as code using Terraform. Beneficial experience of React Native Understanding of RESTful APIs and web application architecture. Experience in a start-up environment. Bachelor’s or … Master’s degree in Computer Science, Engineering, or a related field, or equivalent experience. Familiarity with RESTful APIs and mobile libraries for networking. Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model. Experience with automated testing suites, like Jest or Mocha. Excellent problem-solving skills and the ability to think algorithmically. Experience with cloud message APIs and More ❯

Senior Full Stack Software Developer Tech : AWS, NodeJS, TypeScript, JavaScript, ReactJS, React Native Why? start-up financial services, revolutionising the industry Location : Hybrid - 1/2 days in the office (Central London) Our Client A new UK-based financial services provider is launching credit card, personal loans and insurance offerings aimed at delivering fair, flexible, and user-friendly financial products … similar role with a strong portfolio of projects. Expertise in Node.js and AWS Lambda for serverless backend services. Proficiency in React with Next.js for frontend development. Proficiency in TypeScript, JavaScript and experience with infrastructure as code using Terraform. Ideal experience with React Native Understanding of RESTful APIs and web application architecture. Experience in a start-up environment. Bachelor’s or … Master’s degree in Computer Science, Engineering, or a related field, or equivalent experience. Familiarity with RESTful APIs and mobile libraries for networking. Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model. Experience with automated testing suites, like Jest or Mocha. Excellent problem-solving skills and the ability to think algorithmically. Experience with cloud message APIs and More ❯