{"id":2757967,"url":"https://alion.io/job/the-gym-group-lead-full-stack-developer","title":"Lead Full-Stack Developer","company":{"id":2563358,"name":"The Gym Group","domain":"thegymgroup.com","url":"https://alion.io/company/thegymgroup","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Clapham, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":88000,"max_usd":174000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":46},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"Azure","optional":false},{"name":"Azure DevOps","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"GDPR","optional":false},{"name":"Kubernetes","optional":false},{"name":"Next.js","optional":false},{"name":"Pulumi","optional":false},{"name":"React.js","optional":false},{"name":"Terraform","optional":false},{"name":"C#","optional":true},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-10-16T00:00:00Z","employer_posted_date":"2026-10-16","last_verified_at":"2026-10-17T06:55:53Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Role: Lead Full-Stack Developer\nLocation: Hybrid - 3 days per week in Clapham Junction\nThis is a technical leadership role with real influence over how The Gym Group builds and evolves its digital platforms at scale. You will lead full-stack development across multiple value streams, mentor a talented engineering team, and set the technical direction for a modern Azure-based stack - all within a business that genuinely invests in its people and is on an exciting digital growth journey.\nWho we are...\nWe're not like any other gym company; we are The Gym Group, a place where you can #BeYouWithUs 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.\nWhat you'll be doing...\nLeading full-stack development across value streams, owning technical quality, delivery outcomes, and team capability growth\n\nSetting 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\n\nContributing to low-level solution design alongside the Architecture team, helping turn complex technical requirements into clear, deliverable plans\n\nMentoring developers, building a strong team culture, and actively supporting the professional growth of engineers around you\n\nDefining and governing the use of AI-assisted development tools across the team, including setting guardrails and identifying genuinely high-leverage opportunities\n\nDesigning and managing Azure cloud infrastructure using Kubernetes, Service Bus, APIM, and Key Vault, with IaC via Terraform or Pulumi\n\nDriving adoption of software engineering best practices including TDD, SOLID principles, event-driven architecture, and DevSecOps\n\nCollaborating closely with Product, UI/UX, Architecture, and third-party engineering partners to deliver high-quality digital experiences\n\nWhat we're looking for...\nFive or more years of commercial software development experience, including at least two years in a lead or senior technical role\n\nHands-on full-stack expertise across React/Next.js and .NET Core\n\nProven experience with Azure cloud services and Infrastructure as Code (Terraform or Pulumi)\n\nFamiliarity with CI/CD tooling (Azure DevOps preferred) and containerisation with Docker\n\nStrong grounding in software engineering best practices - TDD, BDD, SOLID, and architectural patterns such as event-driven and serverless\n\nAbility to lead through influence and communicate clearly with both technical and non-technical audiences\n\nOur commitment to inclusion\nAt 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.\nNeed assistance?\nIf you have a disability or condition that makes it difficult for you to complete your application online please email your cv to  or alternatively call the TGG Recruitment team on 0203 319 4838 and someone will be more than happy to support you. 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!\n*Please note that we may close the application window early if we receive high levels of interest. If you're interested in applying please do so asap!\nYour 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. If you have any questions about how your information is used, please contact .\n#LI-CJ1","description_format":"text","description_chars":4384,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Fitness"],"lifecycle":[{"event":"open","at":"2026-10-17T02:11:38Z"}],"visa":[{"country":"GB","licensed_sponsor":true,"evidence":"Licensed UK visa sponsor (Skilled Worker)","filings_12m":null,"filings_prev_12m":null,"green_card_filings_12m":null,"median_offered_wage_usd":null,"route":"Skilled Worker","cap_exempt":false,"checked_at":"2026-10-17T06:21:15+00:00","sources":["UK Home Office: register of licensed sponsors (workers)"],"filings_for_role_12m":0}],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":1,"expected_fill_days":29,"reasons":["conf:3","win:early","comp:brand"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/the-gym-group-lead-full-stack-developer","json_url":"https://alion.io/job/the-gym-group-lead-full-stack-developer.json","meta":{"generated_at":"2026-10-17T19:06:30Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":2240,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":2563358},"rest":"https://alion.io/mcp/rest/get_company?id=2563358"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fthe-gym-group-lead-full-stack-developer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fthe-gym-group-lead-full-stack-developer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fthe-gym-group-lead-full-stack-developer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/the-gym-group-lead-full-stack-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fthe-gym-group-lead-full-stack-developer"}]}