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Full Stack Engineer
Posted 1 day ago by Gravitas Recruitment Group (Global) Ltd
£600 Per day
Outside
Remote
London Area, United Kingdom
Summary: The role of Senior Full Stack Engineer is focused on backend development for an AI start-up, requiring immediate availability for a short-term contract of 2-3 months. The position is remote-first, with optional access to a London office, and demands a candidate who thrives in fast-paced environments. Key responsibilities include designing and maintaining backend services, contributing to frontend development, and collaborating closely with product and engineering teams. Candidates must possess senior-level experience and be comfortable working independently under tight deadlines.
Key Responsibilities:
- Design, build and maintain backend services using Node.js, TypeScript and Nest.js
- Contribute to frontend development using Next.js where required
- Work with AWS services to support scalable, production-ready systems
- Take ownership of features from development through to deployment
- Work closely with product and engineering teams to deliver against tight deadlines
- Adapt quickly to changing priorities in a startup environment
Key Skills:
- Senior-level experience as a Full Stack Engineer with a backend focus
- Proven commercial experience with Node.js, TypeScript and Nest.js
- Hands-on experience with AWS in production environments
- Working knowledge of Next.js
- Comfortable working under pressure and to tight timelines
- Able to work independently and self-sufficiently
- UK-based and immediately available
- Strong communication skills and a proactive approach
- Previous experience working in a digital agency environment (nice to have)
- Experience in early-stage startups or AI-driven products (nice to have)
Salary (Rate): £600 daily
City: London
Country: United Kingdom
Working Arrangements: remote
IR35 Status: outside IR35
Seniority Level: Senior
Industry: IT
Senior Full Stack Engineer (Backend-leaning) Contract | 2–3 months | Outside IR35 | Remote (UK) / London office | ASAP start
We’re working with an AI start-up which is looking for a Senior Full Stack Engineer with a strong backend focus to support the team on a short-term contract. This is an ASAP requirement, so candidates must be UK-based and immediately available. The business is working towards a time-critical deadline, so this role will suit someone who is comfortable operating in a fast-paced, high-pressure environment and able to work self-sufficiently. The role is remote-first, with a London office available for those who prefer occasional on-site collaboration.
Responsibilities
- Design, build and maintain backend services using Node.js, TypeScript and Nest.js
- Contribute to frontend development using Next.js where required
- Work with AWS services to support scalable, production-ready systems
- Take ownership of features from development through to deployment
- Work closely with product and engineering teams to deliver against tight deadlines
- Adapt quickly to changing priorities in a startup environment
Requirements
- Senior-level experience as a Full Stack Engineer with a backend focus
- Proven commercial experience with Node.js, TypeScript and Nest.js
- Hands-on experience with AWS in production environments
- Working knowledge of Next.js
- Comfortable working under pressure and to tight timelines
- Able to work independently and self-sufficiently
- UK-based and immediately available
- Strong communication skills and a proactive approach
Nice to have
- Previous experience working in a digital agency environment
- Experience in early-stage startups or AI-driven products
Contract details
- Length: 2–3 months
- Rate: £500–£600 per day
- Status: Outside IR35
- Location: Remote (UK) with optional London office access
- Start: ASAP