Senior Full Stack Developer

Senior Full Stack Developer - React/Kotlin/Spring

We are seeking an experienced Senior Full Stack Developer to lead the development of an internal Skills Marketplace platform for an established well-known retail business.

This is an opportunity to take ownership of the technical delivery of an MVP, leading a small engineering pod and working closely with business stakeholders to shape a solution that drives user adoption.

The platform is a two-tier web application, utilising Kotlin and Spring on the Back End and React on the Front End. You will combine hands-on full stack development with technical leadership, stakeholder engagement and the use of modern AI engineering tools to accelerate solution design and delivery.

Key Responsibilities

• Lead a small development pod through the design and delivery of an MVP Skills Marketplace platform.
• Take ownership of the day-to-day technical direction and delivery of the project.
• Work directly with stakeholders and end users to understand requirements, usage and adoption.
• Utilise Claude or similar AI-powered development tools to generate initial solution designs and accelerate development.
• Act as the primary technical point of contact between the development team, stakeholders and the wider project team.
• Work collaboratively within a multidisciplinary engineering environment.
• Drive best practices across application design, development and delivery.

Essential Experience

• Proven experience leading technical teams or small engineering squads.
• Strong full stack development experience using React, Kotlin and Spring.
• Experience designing, building and delivering full stack web applications.
• Understanding of AI engineering, AI-assisted development and modern tooling.
• Confident communicating directly with business stakeholders and end users.
• Ability to take ownership, work autonomously and operate effectively in a fast-paced, startup-style environment.
• Strong problem-solving and technical decision-making skills.

Desirable Experience

• Experience using Claude, OpenAI Codex or Google Gemini.
• Claude certification or other relevant AI tooling certifications.
• Previous experience delivering MVPs or internal business platforms.

Contract Details

• Day Rate: £500 per day
• IR35 Status: Inside IR35
• Location: London
• Working Pattern: 2 days per week onsite, remainder remote
• Start Date: ASAP
• Position: Contract