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2 senior javascript engineer jobs found

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senior javascript engineer £400 - £500
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Outside Spy
Mar 04, 2026
6 Months or more
Senior Backend Engineer Node.js/TypeScript at SR2 - Socially Responsible Recruitment, London, 6 Months, £500-£525 per day
£500 - £525 per day
Outside Spy London, UK
Outside IR35 | £500-£525/day | 6 Months Remote - UK We're looking for experienced Backend Engineers to support the development and scaling of Back End platforms powering a range of digital products and internal systems. This is a hands-on contract role suited to senior engineers who enjoy technical ownership, improving system performance, and contributing to architectural decisions while remaining actively involved in delivery. The Role Develop Back End services using Node.js and TypeScript Build and enhance APIs and system integrations Improve scalability, reliability and overall platform performance Contribute to system design and technical decision-making Collaborate closely with engineering and product teams Provide technical guidance where required Technology Environment Node.js TypeScript/JavaScript APIs and microservices Cloud platforms (AWS, GCP or Azure) Distributed Back End systems Experience Required Strong commercial Back End engineering...
Outside Spy
Mar 02, 2026
6 Months or more
Senior Software Engineer at Formula Recruitment, United Kingdom, 6 Months, to £475 per day Outside IR35
£375 - £475 per day
Outside Spy United Kingdom
Contract role : Senior Software Engineer : Up to £475 per day Outside IR35 : 6 months rolling : Hybrid Monthly (London) An innovative digital consultancy is looking for experienced Senior Software Engineers to design and architect scalable, high-performance systems for a cutting-edge platform being developed for a major client. In this role, you'll tackle complex technical challenges as part of an agile team following Scrum methodologies. As a Senior Software Engineer, you'll set the standard for code quality and best practices, actively contributing to code reviews and collaborative programming sessions with your team. As a Senior Software Engineer, you will be experienced with: C#, .Netcore JavaScript, React.js AWS Key information: Up to £475 per day Outside IR35 6 months rolling Hybrid Monthly (London) This is an exciting opportunity for a Senior Software Engineer to join a high-performing development team. Contract role : Senior Software...
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