Lead Full Stack Engineer

Lead Full Stack Engineer (Contract) - Outside IR35

Location: Leeds (2 days on site) Contract type: Outside IR35 Duration: Initial 3 month contract (Chance to extend) Rate: Competitive, dependent on experience

About the Business

Our client is a fast-growing B2B SaaS business developing innovative software that helps organisations manage complex procurement and supplier relationships. Their platform streamlines workflows, improves collaboration, and provides end-to-end contract management with robust audit and compliance capabilities.

The business has partnered with a specialist technology consultancy to accelerate product development and is now looking to bring in an experienced full-stack contractor to work alongside this delivery team.

The Role

We're looking for a Full Stack Engineer who can operate at lead level within a small, high-velocity delivery team. This is a hands-on technical role, you'll be writing and reviewing code day-to-day, you'll also be expected to bring lead-level judgement to architecture, code quality, and delivery practices.

The team ships weekly, runs discovery ahead of delivery, and has embedded rapid, AI-assisted prototyping into everyday workflows. You should be someone who already uses AI coding tools as a core part of how you work, not as an experiment.

Key Responsibilities

• Design, build, and ship features across the full stack for a live, evolving SaaS platform
• Operate at a lead level: setting technical direction, reviewing code, and raising the bar on quality and delivery pace
• Work closely with the delivery consultancy and internal team within a weekly release cadence
• Participate in discovery ahead of delivery, helping shape solutions before build begins
• Use AI-assisted coding tools and rapid prototyping techniques as a core part of the day-to-day workflow
• Contribute to decisions around architecture, technical debt, and platform scalability
• Support a culture of fast, iterative, quality-focused delivery

What We're Looking For

• Strong, demonstrable full-stack experience (front end and back end), ideally within SaaS or platform businesses
• Proven experience operating at a lead or senior/staff level
• Active, practical experience using AI coding assistants (e.g. Copilot, Cursor, Claude Code, or similar) as part of a real delivery workflow
• Comfortable working in a fast-paced, weekly-release environment
• Experience working alongside external consultancies or delivery partners
• Able to commit to 2 days per week on-site in Leeds

Contract Details

• Location: Leeds, 2 days on site
• Rate: Competitive (Based on experience)