Lead Full-Stack Developer

Location:

Hybrid - 3 days per week in Clapham Junction

We're not like any other gym company; we are The Gym Group, a place where you can #Be You With Us  and perform to your absolute best. We are successful; by membership we're the 2nd largest gym business in the UK and the 4th largest in Europe. We hire people with real passion, positivity and enthusiasm which motivates and inspire those around them.

We actively invest in our employees; it's so important to us that our people can thrive in our environment and can make the most of the flexibility and support we offer to all of our teams.

• Leading full-stack development across value streams, owning technical quality, delivery outcomes, and team capability growth
• Setting technical direction across the stack - making pragmatic trade-offs on things like SSR versus client rendering, API design, and architecture patterns with maintainability in mind
• Contributing to low-level solution design alongside the Architecture team, helping turn complex technical requirements into clear, deliverable plans
• Mentoring developers, building a strong team culture, and actively supporting the professional growth of engineers around you
• Defining and governing the use of AI-assisted development tools across the team, including setting guardrails and identifying genuinely high-leverage opportunities
• Designing and managing Azure cloud infrastructure using Kubernetes, Service Bus, APIM, and Key Vault, with IaC via Terraform or Pulumi
• Driving adoption of software engineering best practices including TDD, SOLID principles, event-driven architecture, and Dev Sec Ops
• Collaborating closely with Product, UI/UX, Architecture, and third-party engineering partners to deliver high-quality digital experiences

• Five or more years of commercial software development experience, including at least two years in a lead or senior technical role
• Hands-on full-stack expertise across React/Next.js and .NET Core
• Proven experience with Azure cloud services and Infrastructure as Code (Terraform or Pulumi)
• Familiarity with CI/CD tooling (Azure Dev Ops preferred) and containerisation with Docker
• Strong grounding in software engineering best practices - TDD, BDD, SOLID, and architectural patterns such as event-driven and serverless
• Ability to lead through influence and communicate clearly with both technical and non-technical audiences

At The Gym Group we are committed to creating an inclusive environment where everyone feels welcome to be themselves. We celebrate diversity and know that our teams are stronger for it. We encourage applications from people of all backgrounds, identities and experiences – your perspective matters here.

We also want to put it out there that we actively encourage applications from a diverse demographic and we are passionate about your culture and value alignment. We want this to be a match that works for you as much as for us!

Please note that we may close the application window early if we receive high levels of interest.

Your application may be reviewed by an AI tool to help assess your suitability based on the information you provide. Automated decision-making is never used - every application is reviewed and all decisions, including whether to progress your application, are made exclusively by a member of our recruitment team. Your data will be handled in accordance with our Privacy Policy and UK GDPR.

We’re #1 in our industry when it comes to our values, our culture and our people - check out Glassdoor if you don’t believe us. We offer a fantastic place to work in a great working culture and were recognised as #25 in the Top 50 places to work in the UK in…