Full-Stack Developer

About Solo60

A London-based fitness scale-up whose platform manages dynamic bookings, PT matching, and studio analytics. Stack: React Native (Expo), Next.js, Supabase, Vercel/AWS, Stripe, GitHub Actions, Hex, Figma — with a growing IoT footprint across studios.

The Role

You'll be the second Full Stack engineer, reporting to the Tech Lead. Wide surface area, real ownership, and a direct line into product and commercial decisions. This is a 2026 Product Engineer role. You own the loop from Figma to production, including QA, releases, observability, and postmortems. AI tooling (Claude Code is part of the daily workflow) makes that surface area manageable. It doesn't lower the bar. For the right person, this is a genuine career accelerator — with a clear path to a Lead Engineer position as the team grows.

What You'll Do

• Build across Next.js, Supabase, and React Native — features end-to-end from design to production
• Own mobile releases on App Store and Google Play (versioning, staged rollouts, rejection handling)
• Integrate and maintain Stripe: subscriptions, webhooks, reconciliation, edge cases
• Contribute to the analytics pipeline and Hex dashboards
• Own and improve CI/CD pipelines (GitHub Actions, static analysis, type checking, tests)
• Level up testing discipline: unit, integration, E2E (Playwright / Maestro)
• Use AI tooling as a force multiplier — build workflows, review output critically, raise the team's bar
• Write documentation that survives you: ADRs, runbooks, READMEs
• Take your turn on production issues and write honest postmortems

What We're Looking For

Core experience

• 5+ years full-stack with production Node.js, Next.js, and React Native
• Supabase fluency, or deep enough Postgres (RLS, functions, realtime) to get there fast
• Shipped mobile apps to both stores — including review rejections and staged rollouts
• Real production Stripe: webhooks, idempotency, retries, reconciliation
• Vercel experience: preview deployments, edge functions, environment management
• Figma-to-code fluency with design system judgement
• Designed and owned CI/CD pipelines with quality gates (SonarQube, CodeQL, or similar)

How you work

• Daily Claude Code usage — you can talk about what works, what doesn't, where it breaks
• Clear view of what good code looks like; hold the line under pressure
• Test your own work before handoff; own it when something slips through
• Write things down so the next person doesn't have to ask

Nice to have

IoT integrations (smart locks) · Fitness, hospitality, or bookings background · Webflow

Terms & Benefits

• Salary: £40,000–£50,000 depending on experience, plus equity
• Remote anywhere in the UK or EU, UK business hours (9am–6pm GMT/BST)
• 28 days holiday including bank holidays, increasing with service
• Free Solo60 sessions and full studio access
• Equipment of your choice · Pension

Application

Include a cover letter (300–400 words) covering:

• A production system you have owned end-to-end
• Your experience modernising legacy systems or untangling complex business logic
• How you have used AI tools in the SDLC — what worked, what didn't, what you learned
• Why this role fits your experience

Applications without a cover letter will not be considered.

Interview Process

Three stages, target two weeks, no leetcode.

Stage 1 — Technical Deep Dive (90 min) with Tech Lead Steve: your experience, how you approach product requirements, debugging production issues.

Stage 2 — Product & Collaboration (45 min) with CPO Yoann: working with product teams, building against a roadmap, using data to inform decisions.

Stage 3 — Founder Conversation (30 min) with CEO Ben: broader business discussion. Offer shortly after if all goes well.

• Solo60 is an equal opportunity employer. Flexible working arrangements and reasonable adjustments available at any stage.