501 to 525 of 540 ECMAScript Jobs in London

re looking for someone with: UI development or support experience Exposure to at least two of: ReactJS, GraphQL, AngularJS, AJAX, CSS, Mobile app development Ability to read/debug JavaScript and use browser developer tools Scripting with JavaScript, Python, Bash or Shell Understanding of MySQL or Oracle Strong communication skills and a solutions-driven mindset Nice to have: Experience supporting More ❯

re looking for someone with: UI development or support experience Exposure to at least two of: ReactJS, GraphQL, AngularJS, AJAX, CSS, Mobile app development Ability to read/debug JavaScript and use browser developer tools Scripting with JavaScript, Python, Bash or Shell Understanding of MySQL or Oracle Strong communication skills and a solutions-driven mindset Nice to have: Experience supporting More ❯

complex projects with minimal assistance. You architect high quality web applications, and design key tools and systems that support said web applications. Top Responsibilities: Write and review code in JavaScript or TypeScript,Golang,SQL Test, debug, maintain and/or update full-stack web applications. Write and review technical documents, including design, development, and revision documents. Collaborate with Product, UX … QA, and engineering teams, to deliver new features Mandatory Skills/Qualifications: 3+ years experience writing JavaScript or TypeScript, Golang,SQL 3+ years experience developing resource oriented APIs 3+ years experience designing and debugging databases Experience in multiple general purpose programming languages and building large, scaled full stack web solutions. Microservice design and implementation More ❯

complex projects with minimal assistance. You architect high quality web applications, and design key tools and systems that support said web applications. Top Responsibilities: Write and review code in JavaScript or TypeScript,Golang,SQL Test, debug, maintain and/or update full-stack web applications. Write and review technical documents, including design, development, and revision documents. Collaborate with Product, UX … QA, and engineering teams, to deliver new features Mandatory Skills/Qualifications: 3+ years experience writing JavaScript or TypeScript, Golang,SQL 3+ years experience developing resource oriented APIs 3+ years experience designing and debugging databases Experience in multiple general purpose programming languages and building large, scaled full stack web solutions. Microservice design and implementation More ❯

complex projects with minimal assistance. You architect high quality web applications, and design key tools and systems that support said web applications. Top Responsibilities: Write and review code in JavaScript or TypeScript,Golang,SQL Test, debug, maintain and/or update full-stack web applications. Write and review technical documents, including design, development, and revision documents. Collaborate with Product, UX … QA, and engineering teams, to deliver new features Mandatory Skills/Qualifications: 3+ years experience writing JavaScript or TypeScript, Golang,SQL 3+ years experience developing resource oriented APIs 3+ years experience designing and debugging databases Experience in multiple general purpose programming languages and building large, scaled full stack web solutions. Microservice design and implementation More ❯

complex projects with minimal assistance. You architect high quality web applications, and design key tools and systems that support said web applications. Top Responsibilities: Write and review code in JavaScript or TypeScript, Java, Kotlin, Golang, and/or SQL Test, debug, maintain and/or update full-stack web applications. Write and review technical documents, including design, development, and revision … documents. Collaborate with Product, UX, QA, and engineering teams, to deliver new features Mandatory Skills/Qualifications: 3+ years experience writing JavaScript or TypeScript, Java, Kotlin, Golang, and/or SQL 3+ years experience developing resource oriented APIs 3+ years experience designing and debugging databases Experience in multiple general purpose programming languages and building large, scaled full stack web solutions. More ❯

complex projects with minimal assistance. You architect high quality web applications, and design key tools and systems that support said web applications. Top Responsibilities: Write and review code in JavaScript or TypeScript, Java, Kotlin, Golang, and/or SQL Test, debug, maintain and/or update full-stack web applications. Write and review technical documents, including design, development, and revision … documents. Collaborate with Product, UX, QA, and engineering teams, to deliver new features Mandatory Skills/Qualifications: 3+ years experience writing JavaScript or TypeScript, Java, Kotlin, Golang, and/or SQL 3+ years experience developing resource oriented APIs 3+ years experience designing and debugging databases Experience in multiple general purpose programming languages and building large, scaled full stack web solutions. More ❯

complex projects with minimal assistance. You architect high quality web applications, and design key tools and systems that support said web applications. Top Responsibilities: Write and review code in JavaScript or TypeScript, Java, Kotlin, Golang, and/or SQL Test, debug, maintain and/or update full-stack web applications. Write and review technical documents, including design, development, and revision … documents. Collaborate with Product, UX, QA, and engineering teams, to deliver new features Mandatory Skills/Qualifications: 3+ years experience writing JavaScript or TypeScript, Java, Kotlin, Golang, and/or SQL 3+ years experience developing resource oriented APIs 3+ years experience designing and debugging databases Experience in multiple general purpose programming languages and building large, scaled full stack web solutions. More ❯

/Haskell/AI Senior Frontend Developer - Deep Tech GenAI Startup Title: Senior Frontend Developer Location: Hybrid, London (1 day a week on-site) Domain: AI startup, Engineering Tech: JavaScript, React, TypeScript, Elm, WebGL, Tailwind CSS, AI Salary: £90,000-£150,000 + equity (depending on experience) I'm working with a well-funded Deep Tech GenAI startup that is … interfaces. The frontend stack includes React, TypeScript, Elm, and WebGL, with the backend built mainly in Python and running on AWS. Core skills: Strong senior-level frontend expertise in JavaScript, React, and TypeScript Experience in functional programming (Elm, Haskell, WebGL) Proven track record in small, scaling teams BSc in Computer Science (or related discipline) from a leading university, or equivalent More ❯

/Haskell/AI Senior Frontend Developer - Deep Tech GenAI Startup Title: Senior Frontend Developer Location: Hybrid, London (1 day a week on-site) Domain: AI startup, Engineering Tech: JavaScript, React, TypeScript, Elm, WebGL, Tailwind CSS, AI Salary: £90,000-£150,000 + equity (depending on experience) I'm working with a well-funded Deep Tech GenAI startup that is … interfaces. The frontend stack includes React, TypeScript, Elm, and WebGL, with the backend built mainly in Python and running on AWS. Core skills: Strong senior-level frontend expertise in JavaScript, React, and TypeScript Experience in functional programming (Elm, Haskell, WebGL) Proven track record in small, scaling teams BSc in Computer Science (or related discipline) from a leading university, or equivalent More ❯

integrations, and building developer resources (APIs, SDKs, technical documentation). Solid experience across Integrations, Full Stack Web Development, and Cloud Architecture. Proficiency in one or more of the following: JavaScript, Node.js, Python (or equivalent modern frameworks/languages). Demonstrated success in leading technical teams, particularly those focused on integrations or developer-facing products. Exceptional interpersonal and communication skills – able …/Technical Integration Lead/API Integration Manager/SaaS Integration Engineer/Full Stack Developer/Solutions Architect/Cloud Engineer/Platform Integrations Lead/Node.js/JavaScript/Python/API/Cloud Architecture/Swagger/Computer Science/Software Engineering/Integration Architect/API Solutions Lead/Technical Project Manager/SaaS Platform Engineer More ❯

JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Opportunity: We’re supporting an innovative, fast-moving founding team. They’re building an innovative B2C platform with lots of partnerships already signed up! Very exciting opportunity to take a lot of responsibility … You’ll work closely with the founding team to build scalable, secure, and high-performance systems that deliver an exceptional user experience. What You’ll Be Doing as a JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote 6+ years commercial experience … API work Great communication skills and attitude to get your hands dirty across the stack and business challenges. Nice to have Full stack experience, with TypeScript and React Native JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Location: Remote Type: Contract More ❯

JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Opportunity: We’re supporting an innovative, fast-moving founding team. They’re building an innovative B2C platform with lots of partnerships already signed up! Very exciting opportunity to take a lot of responsibility … You’ll work closely with the founding team to build scalable, secure, and high-performance systems that deliver an exceptional user experience. What You’ll Be Doing as a JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote 6+ years commercial experience … API work Great communication skills and attitude to get your hands dirty across the stack and business challenges. Nice to have Full stack experience, with TypeScript and React Native JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Location: Remote Type: Contract More ❯

JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Opportunity: We’re supporting an innovative, fast-moving founding team. They’re building an innovative B2C platform with lots of partnerships already signed up! Very exciting opportunity to take a lot of responsibility … You’ll work closely with the founding team to build scalable, secure, and high-performance systems that deliver an exceptional user experience. What You’ll Be Doing as a JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote 6+ years commercial experience … API work Great communication skills and attitude to get your hands dirty across the stack and business challenges. Nice to have Full stack experience, with TypeScript and React Native JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Location: Remote Type: Contract More ❯

JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Opportunity: We’re supporting an innovative, fast-moving founding team. They’re building an innovative B2C platform with lots of partnerships already signed up! Very exciting opportunity to take a lot of responsibility … You’ll work closely with the founding team to build scalable, secure, and high-performance systems that deliver an exceptional user experience. What You’ll Be Doing as a JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote 6+ years commercial experience … API work Great communication skills and attitude to get your hands dirty across the stack and business challenges. Nice to have Full stack experience, with TypeScript and React Native JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Location: Remote Type: Contract More ❯

JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Opportunity: We’re supporting an innovative, fast-moving founding team. They’re building an innovative B2C platform with lots of partnerships already signed up! Very exciting opportunity to take a lot of responsibility … You’ll work closely with the founding team to build scalable, secure, and high-performance systems that deliver an exceptional user experience. What You’ll Be Doing as a JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote 6+ years commercial experience … API work Great communication skills and attitude to get your hands dirty across the stack and business challenges. Nice to have Full stack experience, with TypeScript and React Native JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Location: Remote Type: Contract More ❯

I am currently working with a global engineering client who are actively seeking a Fullstack .Net Developer on a long-term contract basis. What you'll need to succeed 10+ years' .Net Development experience, ideally in a large-scale organisation. More ❯

I am currently working with a global engineering client who are actively seeking a Fullstack .Net Developer on a long-term contract basis. What you'll need to succeed 10+ years' .Net Development experience, ideally in a large-scale organisation. More ❯

Hays Software Engineering are looking for a Software Developer to join a fast-growing real estate investment firm. What you will be doing: Heavily contribute to the development of an in-house application designed to streamline the lending process for More ❯

Skills & Experience Java Extensive hands-on coding in Java , following industry best practice. Strong knowledge of Spring Framework and Spring Boot . Experience working with JUnit for automation testing. JavaScript Extensive experience coding in JavaScript . Strong knowledge of the React framework. Practical automation experience with Playwright , Cypress , or Karate . Core Competencies (for all) Strong understanding of Object-Oriented More ❯

authorization and identity federation. Expertise with single sign on, OAuth2, OIDC, PKI, PSD2 SCA knowledge and possession based authentication. ForgeRock developer experience with PingGateway, PingAM, PingIDM and PingDS, including JavaScript coding of PingGateway scripted routes, and PingAM authentication tree nodes Strong hands-on coding across either JavaScript or Java, and you must be comfortable in designing extensible IAM APIs for More ❯

Senior Netsuite Developer Our Client is a leading company who are looking to recruit a Senior Netsuite Developer with Javascript and SQL with extensive Netsuite OneWorld expertise. You will have a degree in Computer Sciences or equivalent certifications. Must have technical working knowledge of NetSuite OneWorld Financials platform, including relevant NetSuite certifications. Ideally have at least 5 to 7 years … experience of developing in Javascript and Oracle SQL in order to develop applications for Netsuite including a minimum 5 years in NetSuite OneWorld. Experience of full software delivery lifecycle including capturing business requirements, developing solutions, user testing & training, post go-live support and optimisation. Experience of integrating Finance packages with other strategic solutions including CRM and eCommerce platforms. Must be More ❯

SC Clearance (UK resident for the last 5 years with no trip abroad over 28 consecutive days) Essential: Experience with GDS prototyping toolkit and Coding experience with HTML, CSS, Javascript/Nunjucks Role Overview We're seeking a user experience designer who can take ownership of the design lifecycle from discovery through to delivery. You’ll be working alongside multidisciplinary … Develop digital and paper-based prototypes quickly to test ideas Contribute to inclusive design practices that meet accessibility standards Code low-fidelity or functional prototypes using HTML, CSS, and JavaScript when needed Required Skills and Experience Eligible for SC Clearance Hands-on experience applying Government Digital Service standards and design principles Familiarity with GDS prototyping toolkit Proficiency with industry-standard More ❯

SC Clearance (UK resident for the last 5 years with no trip abroad over 28 consecutive days) Essential: Experience with GDS prototyping toolkit and Coding experience with HTML, CSS, Javascript/Nunjucks Role Overview We're seeking a user experience designer who can take ownership of the design lifecycle from discovery through to delivery. You’ll be working alongside multidisciplinary … Develop digital and paper-based prototypes quickly to test ideas Contribute to inclusive design practices that meet accessibility standards Code low-fidelity or functional prototypes using HTML, CSS, and JavaScript when needed Required Skills and Experience Eligible for SC Clearance Hands-on experience applying Government Digital Service standards and design principles Familiarity with GDS prototyping toolkit Proficiency with industry-standard More ❯

not be limited to: Developing and maintaining WordPress websites, which will include elements such as plugins, integrations and themes and will focus on expanding functionality as per requirements Using JavaScript, PHP and CSS to write code, ensuring this is well-documented Seeking opportunities to optimise website to enhance SEO, security and performance Actioning and troubleshooting any issues that arise that … DNS management with experience in modifying and managing records inside of Cloudflare and third-party providers Must have the knowledge to build and customise WordPress sites (themes, plugins, PHP, JavaScript, CSS) Experience in manager servers including Nginx & Ubuntu Previous working knowledge of Elementor page builder and WooCommerce Can integrate with third-party APIs Experience in administering Google Workspace, Microsoft Exchange More ❯