2,626 to 2,650 of 2,836 ECMAScript Jobs

Trading UI Engineer – Front Office JavaScript, React, typescript, NodeJS, Tailwind, GraphQL, ApolloQL, Webpack, Cypress, HTML, CSS, REST, Data Visualisation, API. Real Time Trading Software, UI Development Perm Role – London – Onsite. £80000 - £100000 plus bonus Harrington Starr has partnered up with a Global Investment Bank in the City of London who are looking to hire a Senior UI Trading Software Developer … high profile role for a Multi Asset Trading Team within a Front Office environment. As the Senior Trading UI Developer, you will have extensive experience of working with the JavaScript Framework including ES7 and HTML and CSS. You will be working directly with Portfolio Managers, Sales Traders and Quants and end users where you will be responsible for specing out … designing and developing of UI screens for the users. This will require you to have client facing experience as well as low levy programming with JavaScript and React Development experience. Their systems cover all asset classes from FX, Fixed Income, Interest Rates and Commodities including derivative products although this knowledge is not essential but would be advantageous. The application is More ❯

Python Software Engineer Location: MaidstoneSalary: £55,000 - £65,000 Python - Typescript - JavaScript - GIT - Network Security - Overview We're seeking a talented Software Engineer to join a leading engineering company based in Kent. This is an excellent opportunity for a technically minded developer who enjoys working across both software and hardware systems, contributing to innovative solutions in the energy and engineering … . Excellent problem-solving and debugging skills. Experience with embedded systems or hardware interaction would be highly beneficial. Technical Skills Knowledge and experience in the following languages: Python (essential) JavaScript TypeScript Familiarity with other programming languages, frameworks, or modern development tools would be advantageous. Python Software Engineer Location: MaidstoneSalary: £55,000 - £65,000 Python - Typescript - JavaScript - GIT - Network Security More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

world’s leading financial companies. The role would suit a .Net Software Developer with 3+ years of experience who is comfortable working in a full-stack position (.NET, C#, JavaScript, and SQL Server), who is looking for a team where they can learn, grow and kick on in their career. It will be joining a small, high performing team who … Typical responsibilities will include: Designing and implementing new features for SaaS products The majority of development will be with C# and .Net There will also be some front-end JavaScript and SQL Server database work Test-driven development Participate in Agile meetings Does this sound like you? 3+ years’ + experience as a .Net Developer Strong knowledge of C# and … .Net Comfortable full stack with JavaScript (modern framework experience a bonus) and SQL Server Some of the benefits you can expect include: Hybrid working (3 days remote, 2 days in central Bath) Private medical insurance Life insurance Annual performance reviews Bonus scheme 25 days holiday (increases with service) plus buy/sell options Generous pension scheme (employer up to More ❯

with ISO style controls and secure development practices Excellent communicator and coach; fluent in English (German a plus) Our (backend) tech stack NodeJS Express (moving to NestJS) TypeScript (some JavaScript left) MongoDB AWS (quite some bits and pieces) Our (frontend) tech stack React/Redux (well, most of it) Typescript/JavaScript Cypress/Jest Blueprint (UI Library) Our offer More ❯

Software Engineer (Rust, Python, and JavaScript) Alton, Hampshire (Hybrid after probation) Must be Eligible for SC Clearance £30,000 - £50,000 Depending on Experience Join a specialist technical consultancy delivering innovative solutions across software development, data science, AI, and engineering. You'll work on a variety of multi-disciplinary projects applying programming, modelling, and analytical techniques to solve real-world … problems. Key Responsibilities: Develop software in a range of languages - currently including Rust, Python, and JavaScript (but we're flexible depending on project needs). Build and run mathematical models to support expert advice and decision-making. Apply statistical and computational methods to uncover insights from data. Research and apply new techniques, including AI and machine learning. Prepare clear, concise … technical reports and presentations. Skills & Experience: Degree in mathematics or a related scientific discipline. Strong mathematical ability. Programming skills - Rust, Python, and JavaScript are especially valued, but all experience is considered. Solid working knowledge of Microsoft 365. Strong written and verbal communication skills. If you have the relevant skills for this role and are ready for the challenge, then please More ❯

APIs An understanding of Linux. Our LAMP stack means you will have to be comfortable using the Linux command line to get things done Vue.js, Vuex (or another similar JavaScript framework) Amazon Web Services, including how to manage and monitor server instances and database instances PHP Unit & TDD (Test Driven Development) PHP, Javascript, HTML, CSS, NPM, Composer MongoDB Docker AWS More ❯

Senior Test Automation Engineer (SDET) | Up to £80,000 | Hybrid - Basildon 💰 Up to £80,000 + Beneftis 📍 Basildon (Dunton) - x4 Days per Week 🛠️ Playwright, TypeScript/JavaScript, Java, REST Assured, Google Cloud, CI/CD Here at Burns Sheehan, we're working with a leading automotive and financial services organisation modernising their test automation strategy across UK engineering teams. They … automation modules, help teams become self-sufficient, and shape the future of testing across the organisation. What You'll Be Doing: Design and build modular Playwright + TypeScript/JavaScript frameworks from scratch Modularise existing Java/REST Assured API frameworks into reusable, repository-hosted components Lead framework migration - help teams transition from Cypress/Selenium into Playwright Work across … Future scope: distributed performance testing, chaos engineering What They're Looking For: 7+ years software testing, with 5+ years test automation using modern frameworks Strong Playwright + TypeScript/JavaScript experience Proven framework development from scratch - modular, scalable, repository-hosted Object-oriented programming fundamentals - design patterns (e.g., factory patterns) Consultancy mindset Experience in regulated environments (Nice to Have) Google Cloud More ❯

base and extremely innovative product suite are in need of an experienced Support Engineer (Software & Infrastructure). This will be a hugely impactful role, working with Ruby on rails & JavaScript SaaS applications, AWS cloud environments and Linux-based systems. The new Senior Software Support Engineer will be part of a senior team and focus on identifying software issues across a … broad range of software products, focusing on fixing bugs and the route cause analysis of these issues. If you have a full stack software engineering background (JavaScript and either current or previous Ruby on Rails) and really see the importance of ensuring a positive user experience through maintaining and improving software applications, this could be the Senior Software Support Engineer … Engineering to prevent repeat issues. Build automation to streamline debugging, triage, and regression prevention. Improve system performance, reliability, and developer experience. What You’ll Bring Strong experience with modern JavaScript frameworks , a good understanding of Ruby on Rails code working with SaaS applications. Skilled with SQL databases at scale and comfortable in Linux environments . Proven ability to diagnose and More ❯

base and extremely innovative product suite are in need of an experienced Support Engineer (Software & Infrastructure). This will be a hugely impactful role, working with Ruby on rails & JavaScript SaaS applications, AWS cloud environments and Linux-based systems. The new Senior Software Support Engineer will be part of a senior team and focus on identifying software issues across a … broad range of software products, focusing on fixing bugs and the route cause analysis of these issues. If you have a full stack software engineering background (JavaScript and either current or previous Ruby on Rails) and really see the importance of ensuring a positive user experience through maintaining and improving software applications, this could be the Senior Software Support Engineer … Engineering to prevent repeat issues. Build automation to streamline debugging, triage, and regression prevention. Improve system performance, reliability, and developer experience. What You’ll Bring Strong experience with modern JavaScript frameworks , a good understanding of Ruby on Rails code working with SaaS applications. Skilled with SQL databases at scale and comfortable in Linux environments . Proven ability to diagnose and More ❯

App Developer | Full Stack Developer | Mid Level | Finance | FinTech | Scaleup | JavaScript | Java | TypeScript | React | React Native | Spring Boot | DDD | TDD | Manchester | Hybrid | £50,000 - £65,000 Are you a passionate Full Stack Developer looking to put yourself on a better career trajectory? Are you happy in your current role but would prefer more stability and more opportunities for growth? If … soft skills are just as important as commercial background - they have a great team and they want positive people with great potential to join the business! Desired experience: 💻 Frontend : JavaScript/TypeScript, React, React Native, DDD, TDD 💻Backend : Java/JVM, Spring Boot, Spring Cloud AWS If the above doesn't excite you enough, take a look at some of … share😍) Click the apply button to be considered for the role, or for more information, drop me a message! App Developer | Full Stack Developer | Mid Level | Finance | FinTech | Scaleup | JavaScript | Java | TypeScript | React | React Native | Spring Boot | DDD | TDD | Manchester | Hybrid More ❯

global customer base and extremely innovative product suite are in need of an experienced Software Support Engineer. This will be a hugely impactful role, working with Ruby on rails & JavaScript software applications, AWS cloud environments and Linux-based systems. You will be working with an exciting SaaS platform as part of a talented team of Software Engineers & Architects. NearTech have … across our entire system — backend, frontend, and infrastructure — to fix friction points, enhance usability, and make our platform bulletproof. If you’re a full-stack engineer (Ruby on Rails, JavaScript, AWS) who enjoys solving complex issues, improving processes, and making large systems feel effortless to users, you’ll thrive here. What You’ll Do Own product stability end-to-end … repeat issues. Build automation to streamline debugging, triage, and regression prevention. Improve system performance, reliability, and developer experience. What You’ll Bring Strong experience with Ruby on Rails , modern JavaScript , and AWS . Skilled with SQL databases at scale and comfortable in Linux environments . Proven ability to diagnose and fix complex production issues in large systems. A product mindset More ❯

global customer base and extremely innovative product suite are in need of an experienced Software Support Engineer. This will be a hugely impactful role, working with Ruby on rails & JavaScript software applications, AWS cloud environments and Linux-based systems. You will be working with an exciting SaaS platform as part of a talented team of Software Engineers & Architects. NearTech have … across our entire system — backend, frontend, and infrastructure — to fix friction points, enhance usability, and make our platform bulletproof. If you’re a full-stack engineer (Ruby on Rails, JavaScript, AWS) who enjoys solving complex issues, improving processes, and making large systems feel effortless to users, you’ll thrive here. What You’ll Do Own product stability end-to-end … repeat issues. Build automation to streamline debugging, triage, and regression prevention. Improve system performance, reliability, and developer experience. What You’ll Bring Strong experience with Ruby on Rails , modern JavaScript , and AWS . Skilled with SQL databases at scale and comfortable in Linux environments . Proven ability to diagnose and fix complex production issues in large systems. A product mindset More ❯

system stability. Collaborate with internal stakeholders to implement business requirements efficiently. Manage database integrations and optimise queries using MySQL. Contribute to front-end interface improvements using HTML, CSS, and JavaScript (Bootstrap, jQuery). Use Git for version control and code management. Key Skills & Experience: Extensive hands-on experience with Python, ideally in complex or bespoke application environments. Strong knowledge of … MySQL (schema design, query optimisation, and admin tasks). Competence with front-end web technologies - HTML, CSS, JavaScript (including Bootstrap and jQuery). Proficiency with Git for version control and collaborative workflows. Ability to understand and improve legacy systems while developing new features. Strong analytical and problem-solving skills, with a pragmatic approach to balancing improvement with delivery. Advantageous: Linux More ❯