1,226 to 1,250 of 1,324 ECMAScript Jobs in London

Company Profile nLighten is a European platform of distributed edge data centers, designed to meet the growing demand for AI, 5G, and hybrid cloud deployments. As a rapidly expanding provider, we offer scalable colocation hubs and best-in-class energy More ❯

QA Engineer 🧑💻 | C# | JavaScript | Playwright | FinTech | £95,000💷 My client is seeking a QA Engineer to work across the front, middle and back office. This role is seeking candidates who have exposure to the below skill set and come from a financial background. Location - London📍 Salary - £95,000 💷 Hybrid Working - 3 days per week onsite 🏢 Strong proficiency in C# and More ❯

QA Engineer 🧑💻 | C# | JavaScript | Playwright | FinTech | £95,000💷 My client is seeking a QA Engineer to work across the front, middle and back office. This role is seeking candidates who have exposure to the below skill set and come from a financial background. Location - London📍 Salary - £95,000 💷 Hybrid Working - 3 days per week onsite 🏢 Strong proficiency in C# and More ❯

QA Engineer 🧑💻 | C# | JavaScript | Playwright | FinTech | £95,000💷 My client is seeking a QA Engineer to work across the front, middle and back office. This role is seeking candidates who have exposure to the below skill set and come from a financial background. Location - London📍 Salary - £95,000 💷 Hybrid Working - 3 days per week onsite 🏢 Strong proficiency in C# and More ❯

QA Engineer 🧑💻 | C# | JavaScript | Playwright | FinTech | £95,000💷 My client is seeking a QA Engineer to work across the front, middle and back office. This role is seeking candidates who have exposure to the below skill set and come from a financial background. Location - London📍 Salary - £95,000 💷 Hybrid Working - 3 days per week onsite 🏢 Strong proficiency in C# and More ❯

and are looking to scale out their engineering team. Role And Responsibilities You will be joining a forward thinking and collaborative team in developing online platforms using Typescript, NodeJS, Javascript and React. Job Requirements 6+ years commercial development experience Strong Typescript and Javascript skills Good communication skills More ❯

and are looking to scale out their engineering team. Role And Responsibilities You will be joining a forward thinking and collaborative team in developing online platforms using Typescript, NodeJS, Javascript and React. Job Requirements 6+ years commercial development experience Strong Typescript and Javascript skills Good communication skills More ❯

and are looking to scale out their engineering team. Role And Responsibilities You will be joining a forward thinking and collaborative team in developing online platforms using Typescript, NodeJS, Javascript and React. Job Requirements 6+ years commercial development experience Strong Typescript and Javascript skills Good communication skills More ❯

and are looking to scale out their engineering team. Role And Responsibilities You will be joining a forward thinking and collaborative team in developing online platforms using Typescript, NodeJS, Javascript and React. Job Requirements 6+ years commercial development experience Strong Typescript and Javascript skills Good communication skills 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 ❯

business stakeholders to align technology decisions with strategic goals. Experience: 3–6 years of hands-on coding experience with a strong foundation in software development and system architecture (PHP, JavaScript, WordPress). Proven experience leading technical teams or having transitioned into a managerial or strategic role. Skilled in WordPress platform/hosting, HTML, CSS, JavaScript, PHP, Vue, and MySQL. Experience More ❯

business stakeholders to align technology decisions with strategic goals. Experience: 3–6 years of hands-on coding experience with a strong foundation in software development and system architecture (PHP, JavaScript, WordPress). Proven experience leading technical teams or having transitioned into a managerial or strategic role. Skilled in WordPress platform/hosting, HTML, CSS, JavaScript, PHP, Vue, and MySQL. Experience More ❯

business stakeholders to align technology decisions with strategic goals. Experience: 3–6 years of hands-on coding experience with a strong foundation in software development and system architecture (PHP, JavaScript, WordPress). Proven experience leading technical teams or having transitioned into a managerial or strategic role. Skilled in WordPress platform/hosting, HTML, CSS, JavaScript, PHP, Vue, and MySQL. Experience More ❯

business stakeholders to align technology decisions with strategic goals. Experience: 3–6 years of hands-on coding experience with a strong foundation in software development and system architecture (PHP, JavaScript, WordPress). Proven experience leading technical teams or having transitioned into a managerial or strategic role. Skilled in WordPress platform/hosting, HTML, CSS, JavaScript, PHP, Vue, and MySQL. Experience More ❯

Frontend Software Developer London (Remote) | £30,000–£45,000 + shares & bonus Tech: JavaScript, React, TypeScript, Next.js, HTML, CSS We’re partnered with a leading SaaS company in the HR technology space, looking for a junior to mid-level frontend developer to join their growing team. You’ll work on modern, responsive web applications, using React and the latest frontend … user experiences Write clean, maintainable React code and contribute to continuous improvement What we’re looking for: Some commercial frontend experience, ideally with React and TypeScript Solid knowledge of JavaScript, HTML5, and CSS3 Benefits: Remote working Share options and performance bonuses More ❯

Frontend Software Developer London (Remote) | £30,000–£45,000 + shares & bonus Tech: JavaScript, React, TypeScript, Next.js, HTML, CSS We’re partnered with a leading SaaS company in the HR technology space, looking for a junior to mid-level frontend developer to join their growing team. You’ll work on modern, responsive web applications, using React and the latest frontend … user experiences Write clean, maintainable React code and contribute to continuous improvement What we’re looking for: Some commercial frontend experience, ideally with React and TypeScript Solid knowledge of JavaScript, HTML5, and CSS3 Benefits: Remote working Share options and performance bonuses More ❯

client of Opus, who is a profitable, investment-backed SaaS company with serious growth plans! We’re hiring Backend-focused Ruby Developers or Full Stack Ruby Developers with modern JavaScript experience (React, Vue, etc.) to join their tech team in London. This is a rare opportunity to be part of a company that’s not only profitable but also growing … days/week in their London office (flexible based on team needs). What You’ll Bring: Strong experience with Ruby (Rails or other frameworks). Exposure to modern JavaScript (React, Vue, or similar). Passion for clean code, scalable systems, and collaborative development. Mentoring junior and mid-level developers More ❯

client of Opus, who is a profitable, investment-backed SaaS company with serious growth plans! We’re hiring Backend-focused Ruby Developers or Full Stack Ruby Developers with modern JavaScript experience (React, Vue, etc.) to join their tech team in London. This is a rare opportunity to be part of a company that’s not only profitable but also growing … days/week in their London office (flexible based on team needs). What You’ll Bring: Strong experience with Ruby (Rails or other frameworks). Exposure to modern JavaScript (React, Vue, or similar). Passion for clean code, scalable systems, and collaborative development. Mentoring junior and mid-level developers More ❯

tools, delivering actionable insights, and driving data-informed decisions. Experience with Adobe Web SDK and Customer Journey Analytics is highly desirable. Key responsibilities include managing tag implementations. Proficiency in JavaScript, familiarity with SDLC, and comfort with agile sprint teams are essential. Responsibilities: Tag Management: Implement and maintain internal and third-party tags for data capture across digital assets. Quality Assurance … changes. Data Governance: Establish practices for data privacy, compliance, and security. Skills & Qualifications: Essential 7+ years' experience in Adobe Data Collection and Analytics, with strong skills in HTML, CSS, JavaScript, Excel, and data visualization (Tableau, PowerBI). Ability to work independently, design solutions, write technical documentation, QA, and troubleshoot data collection code in complex environments using tag management systems. Strong More ❯

tools, delivering actionable insights, and driving data-informed decisions. Experience with Adobe Web SDK and Customer Journey Analytics is highly desirable. Key responsibilities include managing tag implementations. Proficiency in JavaScript, familiarity with SDLC, and comfort with agile sprint teams are essential. Responsibilities: Tag Management: Implement and maintain internal and third-party tags for data capture across digital assets. Quality Assurance … changes. Data Governance: Establish practices for data privacy, compliance, and security. Skills & Qualifications: Essential 7+ years' experience in Adobe Data Collection and Analytics, with strong skills in HTML, CSS, JavaScript, Excel, and data visualization (Tableau, PowerBI). Ability to work independently, design solutions, write technical documentation, QA, and troubleshoot data collection code in complex environments using tag management systems. Strong More ❯

tools, delivering actionable insights, and driving data-informed decisions. Experience with Adobe Web SDK and Customer Journey Analytics is highly desirable. Key responsibilities include managing tag implementations. Proficiency in JavaScript, familiarity with SDLC, and comfort with agile sprint teams are essential. Responsibilities: Tag Management: Implement and maintain internal and third-party tags for data capture across digital assets. Quality Assurance … changes. Data Governance: Establish practices for data privacy, compliance, and security. Skills & Qualifications: Essential 7+ years' experience in Adobe Data Collection and Analytics, with strong skills in HTML, CSS, JavaScript, Excel, and data visualization (Tableau, PowerBI). Ability to work independently, design solutions, write technical documentation, QA, and troubleshoot data collection code in complex environments using tag management systems. Strong More ❯

tools, delivering actionable insights, and driving data-informed decisions. Experience with Adobe Web SDK and Customer Journey Analytics is highly desirable. Key responsibilities include managing tag implementations. Proficiency in JavaScript, familiarity with SDLC, and comfort with agile sprint teams are essential. Responsibilities: Tag Management: Implement and maintain internal and third-party tags for data capture across digital assets. Quality Assurance … changes. Data Governance: Establish practices for data privacy, compliance, and security. Skills & Qualifications: Essential 7+ years' experience in Adobe Data Collection and Analytics, with strong skills in HTML, CSS, JavaScript, Excel, and data visualization (Tableau, PowerBI). Ability to work independently, design solutions, write technical documentation, QA, and troubleshoot data collection code in complex environments using tag management systems. Strong More ❯

translate stakeholder goals into functional and technical requirements , ensuring clarity between business need and technical delivery. Design and develop intelligent, adaptive web platforms leveraging modern frameworks (React, TypeScript/JavaScript, CSS, AWS Amplify, GraphQL). Apply AI-assisted tooling and automation throughout the development lifecycle — from code generation and testing to deployment and optimisation. Lead innovation by evaluating and integrating … in accessibility, privacy, and performance while maintaining clean, modern, and secure codebases. What You’ll Bring Strong background in front-end and full-stack development using React, TypeScript/JavaScript, and modern cloud environments (AWS, GCP, or similar). Experience working with headless CMS platforms such as Storyblok, and strong understanding of API design (REST/GraphQL). Proven ability More ❯

translate stakeholder goals into functional and technical requirements , ensuring clarity between business need and technical delivery. Design and develop intelligent, adaptive web platforms leveraging modern frameworks (React, TypeScript/JavaScript, CSS, AWS Amplify, GraphQL). Apply AI-assisted tooling and automation throughout the development lifecycle — from code generation and testing to deployment and optimisation. Lead innovation by evaluating and integrating … in accessibility, privacy, and performance while maintaining clean, modern, and secure codebases. What You’ll Bring Strong background in front-end and full-stack development using React, TypeScript/JavaScript, and modern cloud environments (AWS, GCP, or similar). Experience working with headless CMS platforms such as Storyblok, and strong understanding of API design (REST/GraphQL). Proven ability More ❯

translate stakeholder goals into functional and technical requirements , ensuring clarity between business need and technical delivery. Design and develop intelligent, adaptive web platforms leveraging modern frameworks (React, TypeScript/JavaScript, CSS, AWS Amplify, GraphQL). Apply AI-assisted tooling and automation throughout the development lifecycle — from code generation and testing to deployment and optimisation. Lead innovation by evaluating and integrating … in accessibility, privacy, and performance while maintaining clean, modern, and secure codebases. What You’ll Bring Strong background in front-end and full-stack development using React, TypeScript/JavaScript, and modern cloud environments (AWS, GCP, or similar). Experience working with headless CMS platforms such as Storyblok, and strong understanding of API design (REST/GraphQL). Proven ability More ❯