javascript jobs in London

JavaScript Developer - React / TypeScript Ncounter is supporting a growing technology consultancy delivering digital transformation programmes across law enforcement, public safety and wider government. We are looking for an experienced Frontend Developer who can combine strong hands-on engineering with the confidence to work in a consulting environment,...

Software Engineer III (Java & JavaScript)Do you enjoy designing and developing scalable, high-performance applications using Java and JavaScript?About the team:You will join the Identity & Access Management team, which owns the authentication and authorisation infrastructure underpinning Elsevier’s global product suite. We build and operate a highly...

Design Technology Developer | Python / C# / JavaScript | Central LondonA household-name global leader, headquartered in London with 400+ people worldwide, is expanding its Digital Design team and looking for a talented Developer to build the tools shaping the future of Architecture & Interior Design.You'll work where software engineering meets design,...

Elsevier is seeking a Software Engineer III to design and implement scalable applications using Java and JavaScript. You will join the Identity & Access Management team, owning authentication and authorisation infrastructure across a global product suite on AWS.The role emphasizes code quality, CI/CD, and Agile collaboration, with AI-assisted development...

Ruby Developer – HTML5, Rails Javascript, TDD Quant Capital is urgently looking for a Ruby Developer to join our high profile client.Our client is in this year’s fintech50 and well known to disrupt the global payments and Foreign exchange markets.The position is for a hands mid level or senior Ruby Developer to build new and maintain existing Rails...

Ruby Developer – HTML5, Rails Javascript, TDD Quant Capital is urgently looking for a Ruby Developer to join our high profile client.Our client is in this year’s fintech50 and well known to disrupt the global payments and Foreign exchange markets.The position is for a hands mid level or senior Ruby Developer to build new and maintain existing Rails...

Junior Ruby Developer – HTML5, Rails Javascript, TDD Quant Capital is urgently looking for a Junior Ruby Developer to join our high profile client.Our client is in this year’s fintech50 and well known to disrupt the global payments and Foreign exchange markets.The position is for a hands Junior Ruby Developer to build new and maintain existing Rails...

My client, a Global Supply Chain organisation are looking to recruit an experienced Blue Yonder WMS Developer to help migrate C# applications into Blue Yonder using JavaScript. This role is for an initial 6 month contract to start ASAP. Key Technical Skills, Knowledge and Experience: Essential: Proven experience developing and supporting Blue Yonder (JDA)...

Job Reference: NJ0210 Date Posted: 1 October 2026 Recruiter: Nexus Jobs Location: London Salary: 60,000 to 85,000 Sector: I.T. & Communications Job Type: Permanent Work Hours: Full Time Contact: Jas Gujral Email: Telephone: Apply for this job now Job Description Javascript and Agile Software Developer – Central London The Client Developer...

Job Description Javascript Front End Developer – Central London JavaScript Engineer required to join a fast growing company and shape the future of payments cross-platform and cross-device? Evolving in an agile and collaborative environment, you will be part of a multidisciplinary and excellence-driven team and bring your solid native JavaScript skills and...

AI Software Developer (Python, JavaScript, ML) - London/HybridDay rate: £500 - £800 (inside IR35)Duration: 6 - 12 monthsStart: ASAPHybrid: 3 days on site per weekAbout the RoleMy client is looking for a Software Developer with AI, Python and JavaScript experience to join on a contract basis. As a Software Developer - AI, you will focus on the development...

AI Software Engineer, AI Solutions Engineer, AI Software Developer, Python, JavaScript, Co-Pilot Studio, Azure AI Foundry, City of LondonAI Software Engineer required to work for a Professional Services business based in the City of London. This will be a role that is 3 days per week in the office and 2 from home.This role is for a hands-on AI Solutions...

Job Description Adobe Livecycle Developer with Oracle and Javascript – West London We urgently require an Adobe Livecycle Developer with Oracle and Javascript experience. Must have at least 2 to 3 years experience of working with Adobe Livecycle coupled with Oracle and PL/SQL. You will be involved in working with stakeholder and sponsor functions to...

AI Software Engineer, AI Solutions Engineer, AI Software Developer, Python, JavaScript, Co-Pilot Studio, Azure AI Foundry, City of LondonAI Software Engineer required to work for a Professional Services business based in the City of London. This will be a role that is 3 days per week in the office and 2 from home.This role is for a hands-on AI Solutions...

Lead Engineer, Lead Developer, Full Stack Engineering, Azure, .NET, C#, City, LondonLead AI Engineer / Lead AI Developer required for an exciting Professional Services organisation. This will be 3 days in the office and 2 from home.We need a hands-on Lead AI Engineer / Lead AI Developer who can also lead people, set standards and deliver real outcomes in a...

Elsevier is seeking a Software Engineer III to design and develop scalable Java and JavaScript applications within the Identity & Access Management platform. You will help operate a high-availability identity service on AWS ECS/EKS, implement code with CI/CD pipelines, and participate in AI-assisted development workflows.The role emphasizes collaboration in...

Senior Full-Stack Software Engineer (Java & React / Javascript / Angular)Would you like to help create products to support the sharing of scientific knowledge?Do you enjoy collaborating to solve complex technical problems?About the team:Our dynamic Agile Teams deliver the technology which facilitates researchers to publish quality scientific research. As a...

Senior Full Stack Engineer (TypeScript / Node / AWS)£60,000 to £70,000 Fully remote (UK)My client is a product-led software business building a modern customer experience platform for eCommerce brands, focused on the post-purchase journey. They’re looking for a Senior Full Stack Engineer with strong TypeScript and Node.js experience to help scale and...

Key ResponsibilitiesK6/Locust Performance Testing, Load/Stress Testing, Scalability Validation, Performance Analysis, and Azure Monitoring.Azure AI Foundry Evaluation, Golden Dataset Validation, RAG Testing, Hallucination Detection, and AI Output Quality Assurance.Azure AI Foundry Red Teaming, Prompt Injection Testing, Bias & Fairness Assessment, Toxicity...

We are seeking an experienced Test Automation Engineer to design, develop, and maintain scalable automated testing solutions for web applications, APIs, and end-to-end business workflows. The role requires strong hands-on automation engineering skills, with a focus on Playwright, Python/JavaScript, CI/CD integration, performance testing, and modern...