1 to 25 of 2,291 ECMAScript Jobs in London

experience of relational and NoSQL database design and implementation Experience building on container platforms such as Docker, Kubernetes Front-end skills Experience of using at least one of these JavaScript frameworks to create modern front-ends - React.js, Angular or Vue HTML, CSS, JavaScript (ES6) or TypeScript Webpack or Gulp A client-side Unit Testing framework e.g., Mocha or Jest Other More ❯

experience of relational and NoSQL database design and implementation Experience building on container platforms such as Docker, Kubernetes Front-end skills Experience of using at least one of these JavaScript frameworks to create modern front-ends - React.js, Angular or Vue HTML, CSS, JavaScript (ES6) or TypeScript Webpack or Gulp A client-side Unit Testing framework e.g., Mocha or Jest Other More ❯

Ideal Candidate will have: Experience of working in a professional and agile software development environment. Strong knowledge of C# and the .NET Framework, especially ASP.NET. Strong knowledge of HTML5, ECMAScript 6+, CSS3 and the Web Platform. Strong component-based web development in JavaScript or TypeScript using frameworks such as Web Components, React, VueJs or Angular. In-depth experience in at … empowered to be their authentic selves. As an equal opportunity employer, we are committed to embracing all forms of diversity across our organisation. Core Skills: C#, .NET Core, React, JavaScript, Angular Other Skills: ASP.NET, TypeScript, SQL, Agile, CI/CD Seniority: Senior #J-18808-Ljbffr More ❯

code is clear, maintainable and re-usable Develop and maintain web applications, ensuring responsiveness and efficiency Design and implement user interfaces and web page layouts using HTML, CSS, and JavaScript Build server-side applications and APIs using C# Work with SQL Server Databases to design and manage data storage solutions Maintain stability and performance while integrating and releasing systems Maintain … Knowledge, Skills & Experience; Essential: Bachelor’s degree in computer Science or equivalent experience. Demonstrable experience as a Full Stack Developer using the following key technologies: C#, ASP.NET, HTML, CSS, JavaScript, T-SQL, React PowerShell, bicep, GIT Redis, SQL Server Azure functions, web applications, storage, logic apps, key vault, event grid, service buses, Identity Services, Graph and DevOps Good experience with More ❯

non-technical terms depending on audience The full development lifecycle delivering user-centred digital solutions A full stack developer using core Java, CXF, Spring Boot, Jetty, Mustache, HTML, CSS & JavaScript JavaScript library and framework experience is preferable - Node, React, Angular Containerisation experience - Docker or Kubernetes or similar Experience of Microservices design and architecture Restful API Services experience Working within agile More ❯

user interfaces and robust data services that will serve as the backbone for Trafigura's trading operations. Knowledge Skills and Abilities, Key Responsibilities: Frontend Expertise : Strong proficiency in React, JavaScript/TypeScript, HTML5, and CSS3 for building responsive and interactive user interfaces. Java Backend Expertise : Strong proficiency in Java development, including Spring Framework, Spring Boot, and JVM optimisation techniques for … on full stack development experience, with at least 3 years working on data-intensive applications. React Experience : At least 3 years of experience developing applications with React and modern JavaScript frameworks Java Experience : At least 4 years of experience in Java backend development, including Spring Framework. Project Experience : Previous involvement in system rewrites or greenfield/migration development projects, preferably More ❯

in Computer Science, Engineering, or a related field. Proven experience as a Software Engineer, Software Developer, or similar role. Proficiency in one or more programming languages (e.g., Java, Python, JavaScript, C#). Familiarity with front-end (e.g., React, Angular) and/or back-end (e.g., Node.js, Django, .NET) frameworks. Experience with databases (SQL and/or NoSQL), REST APIs, and More ❯

trends. Required Skills and Qualifications: Bachelor's degree in Computer Science, Information Technology, or related field, or equivalent practical experience. Proficiency in front-end technologies such as HTML, CSS, JavaScript, and modern frameworks/libraries such as React. Proficiency in mobile device technologies such for Kotlin (Android) and Swift (iOS) Strong understanding of server-side languages and frameworks such as More ❯

trends. Required Skills and Qualifications: Bachelor's degree in Computer Science, Information Technology, or related field, or equivalent practical experience. Proficiency in front-end technologies such as HTML, CSS, JavaScript, and modern frameworks/libraries such as React. Proficiency in mobile device technologies such for Kotlin (Android) and Swift (iOS) Strong understanding of server-side languages and frameworks such as More ❯

a Software Development Team Lead (Web) on a full-time, permanent, remote-working basis, in the UK. We are seeking a skilled senior Front-End developer with expertise in Javascript, Typescript & React to enhance products and services. This role will also contain line management responsibilities of a small team (3-4 people). The employee will play a pivotal role … this position, your core duties and responsibilities will include (but will not be limited to): Helping develop and maintain efficient, reusable, and reliable frontend code using HTML5/CSS3, JavaScript, TypeScript, and React Working closely with cross-functional teams, including UI/UX designers, backend developers, and product managers, to deliver high-quality user interfaces Ensuring the technical feasibility of … technologies to ensure our applications are built using the best practices Line managing a small team, developing their abilities through coaching and mentoring Our Technology Stack Frontend App Framework - JavaScript & TypeScript/React Frontend State Management - Mobx Backend – Java REST & GraphQL Services & Python CI/CD - GitHub & CircleCI Cloud – AWS What We Are Looking For The ideal candidate will be More ❯

and mobile applications for the company. Senior Full Stack Engineer Skills/Knowledge This role requires the following key skills and knowledge: Front-End: Proficiency in HTML, CSS, and JavaScript (including experience with TypeScript). Experience with front-end frameworks/libraries such as React, Angular, or Vue.js. Knowledge of data visualization libraries (e.g., D3.js, Chart.js). Understanding of modular More ❯

features and want to play a crucial role in a dynamic environment, we want to hear from you. Key Responsibilities: Design and implement complex front-end features using modern JavaScript frameworks and libraries. Collaborate with UX/UI designers and stakeholders to create seamless user experiences. Optimise performance, accessibility, and cross-browser compatibility. Contribute to the evolution of our architecture. … latest technologies and evaluate their potential application in our product. Contribute to the continuous improvement of our development processes and tooling. What You've Got: Expert-level proficiency in JavaScript/TypeScript and modern front-end frameworks (e.g., React, Vue, or Angular). Strong understanding of web technologies (HTML5, CSS3, WebSockets) and browser APIs. Proficient in responsive design and cross … in seeking opportunities to improve processes and systems. Ability to work effectively in an agile, collaborative environment. Required: Strong experience in software development for SaaS applications. Extensive experience with JavaScript and at least one modern front-end framework. Proven track record of delivering high-quality, user-centric features in a SaaS product. Experience with version control systems (e.g., Git) and More ❯

here Our Tech & Tools AWS, AWS Serverless, Azure AWS CDK for C#, SST ECS, Linux, Ansible, Packer New Relic, Insight Hub Product Development Stacks: Ruby, Ruby on Rails, Ember.js, JavaScript NodeJS, TypeScript, Angular, TailwindCSS .NET 7, Blazor WebAssembly Puma, Sidekiq Postgres, Redis GitHub, AzureDevOps, Slite, Slack How You'll Make An Impact We are looking for a talented senior software … Bring With You Senior-level engineer with 5+ years of experience Strong at developing web applications using an object orientated language like Ruby, being familiar with Ruby on Rails, JavaScript, HTML and CSS Experience working with Single Page Applications and Javascript frameworks such as React, Angular, Vue.js or (preferably) Ember.js Desirable: A robust knowledge of building and working with RESTful More ❯

years experience in similar roles Software development, application development and cloud computing experience Experience in architecting software and creating applications from scratch Frontend: proficiency in languages like HTML5, CSS3, JavaScript, Java Backend: proficiency in languages like PHP, Python Django/Flask, Node.JS, Express.JS Operating Systems: Windows, macOS Databases: proficiency in databases like MySQL, SQL Server, MongoDB, PostgreSQL, etc. Familiarity with … CI/CD, and related tools like Jenkins, Azure, Docker, etc. Experience in developing web-based application and mobile applications Understanding of RESTful API-based architecture Frontend: Kotlin, Swift JavaScript Frameworks: React, AngularJS, Vue.JS, etc. Operating Systems: Android, iOS, Linux, ChromeOS Ability to write scripts in Linux and Windows environments (e.g., Makefiles, Bash scripting, PowerShell, etc.) Previous hands-on expertise More ❯

bring Skills and Experience Extensive experience in software engineering, with a strong focus on delivering incremental value through high-quality, scalable, and maintainable solutions. Strong proficiency in C#, .NET, JavaScript, and TypeScript (required). Proficiency in front-end development using frameworks like React, Vue.js, or Angular (preferred but not required). Proficiency with PHP (desirable) Experience working with cloud infrastructure More ❯

API. Web Application Frameworks (ASP.NET MVC, SPA) Enterprise content management achieved through Sitecore RESTful Microservices – light-weight efficient, decoupled APIs that scale well. Event driven architectures (Kafka) Modern reactive JavaScript Frameworks (React, Next.js, Vue.js, Angular) Advanced web topologies (Headless, Jamstack) Storage technologies like SQL, Redis and SOLR Automated UI and API testing (BDD, Selenium) Cloud technologies (Azure/AWS/ More ❯

data models, and data transformation within data warehouses, knowledge of tools such as DBT is desired. Experience with front-end technologies, such as HTML5, CSS3, and JavaScript. Knowledge of JavaScript frameworks, such as React (preferred), Angular, and Vue.js. Knowledge of CSS frameworks, such as Bootstrap, Material UI, and Tailwind CSS. Strong understanding of API protocols and standards, including REST and More ❯

5+ years of professional software engineering experience , with demonstrable experience across frontend, backend, and infrastructure. Proficient in modern frontend frameworks (e.g., React, Next.js, Vue.js) with a strong grasp of JavaScript/TypeScript, HTML, and CSS. Backend engineering experience with one or more languages (e.g., Node.js, Go, Python, Java, etc.), and familiarity with API design (REST, GraphQL, or gRPC). Frontend More ❯

strategy, influencing the direction of our engineering culture and practices while helping us build an environment where developers thrive and create meaningful change. Our Tech Stack Languages: TypeScript/JavaScript, C# Libraries and frameworks: React, Next.js, Node,js, .NET Testing: Vitest, PlayWright, Pact, K6 Datastores: PostgreSQL, CosmosDB, Redis Infrastructure and DevOps: GitHub Actions, Azure, Kubernetes, Docker, Terraform Monitoring: Grafana, Azure More ❯

the Scrum framework and utilising Azure DevOps to facilitate that work. Proficient in programming languages and tooling as follows: NET Core/.NET Framework, C# HTML/CSS/Javascript TypeScript, AngularJS, KnockoutJS QA tooling such as - Selenium, Playwright, Spectflow, Reqcnroll Azure DevOps, Git, Deployment Pipelines, Terraform Massaging Queues, API's: SOAP & REST Demonstrated expertise in building REST APIs for More ❯

the Scrum framework and utilising Azure DevOps to facilitate that work. Proficient in programming languages and tooling as follows: NET Core/.NET Framework, C# HTML/CSS/Javascript TypeScript, AngularJS, KnockoutJS QA tooling such as - Selenium, Playwright, Spectflow, Reqcnroll Azure DevOps, Git, Deployment Pipelines, Terraform Massaging Queues, API's: SOAP & REST Demonstrated expertise in building REST APIs for More ❯

patching strategies Environment strategy (Dev/Test/Prod) and release gating Git workflows (feature branching, pull requests) Confident in extending the functionality of Power Platform using C#, .Net, JavaScript/TypeScript to enable client-side logic. Able to lead on architecture and solution governance, transforming business requirements into scalable, maintainable solutions, including: Establishing naming conventions, environment strategy, security model More ❯

We're looking for a driven and curious Software Development Engineer with strong full stack experience. If you're passionate about creating intuitive user interfaces, have expertise in modern JavaScript frameworks, micro frontend architectures, and can reason about product development to contribute to overall end-to-end architecture, this is the opportunity for you. You'll contribute to our modern … in evolving our platform that powers real-time decision-making for our business. In This Role, You Will Design and develop responsive, performant, and accessible user interfaces using modern JavaScript frameworks (e.g., React), advanced front-end technologies, and TypeScript. Architect and implement micro frontend solutions to enable scalable, modular, and independently deployable frontend applications. Develop server-side applications and APIs … practices and patterns. Participate actively in technical discussions, design reviews, and code reviews. Continuously learn and grow your understanding of modern front-end technologies, micro frontend patterns, server-side JavaScript, and best practices. Work with RESTful APIs and GraphQL to integrate front-end applications with backend services. Support and improve CI/CD pipelines and implement robust front-end testing More ❯

this position, your core duties and responsibilities will include (but will not be limited to): Helping develop and maintain efficient, reusable, and reliable frontend code using HTML5/CSS3, JavaScript, TypeScript, and React Working closely with cross-functional teams, including UI/UX designers, backend developers, and product managers, to deliver high-quality user interfaces Ensuring the technical feasibility of … and productivity Staying up to date with the latest industry trends and technologies to ensure our applications are built using the best practices Our Technology Stack Frontend App Framework - JavaScript/TypeScript/React Frontend State Management - Mobx Backend – Java REST/GraphQL Services CI/CD - GitHub/CircleCI Cloud – AWS What we are looking for A Bachelor's … Technology, or a related field Mid to senior level experienced developer Demonstrable success and involvement in software design and implementation of production-ready clients using technologies such as: HTML5, JavaScript, CSS3, Typescript, and React Experience with APIs and using patterns such as REST and GraphQL Experience with testing frameworks and methodologies, ensuring the delivery of high-quality software Strong problem More ❯

following, and be capable of learning the rest as needed: • Distributed or large-scale systems • MySQL/SQL database design, query optimisation and admin • Web development in HTML, CSS, JavaScript, Vue/React • Apache web server software and related modules • Cloud platforms and concepts (AWS, Google Cloud, Azure) • Setup, testing and administration of CI/CD pipelines • Networking and firewalling … following, and be capable of learning the rest as needed: • Distributed or large-scale systems • MySQL/SQL database design, query optimisation and admin • Web development in HTML, CSS, JavaScript, Vue/React • Apache web server software and related modules • Cloud platforms and concepts (AWS, Google Cloud, Azure) • Setup, testing and administration of CI/CD pipelines • Networking and firewalling More ❯