On the lookout for a Lead Backend Developer to join Trainerize powered by ABC Fitness Solutions ( ABC Fitness Solutions builds comprehensive, scalable technology and software designed to manage and grow fitness businesses of all sizes. We need a Lead Backend Developer to design APIs and data layers, improve performance and reliability, and grow the backend practice - including code review, standards, and mentoring.This is a Canada-based individual contributor role. You will lead through technical direction, influence, code quality, mentoring, and cross‑functional partnership — not through people management. If that vision excites you, this is where it gets built. You’ll spend your days on the high‑volume APIs that power fitness experiences for millions, in an environment where AI agents are part of how you think, build, and review. Every feature you ship and every standard you set helps prove that AI‑native engineering isn’t a side project here — it’s how we build.RESPONSIBILITIESDesign, develop, test, and document software for existing and new productsBuild, maintain, and optimize .NET backend services (ASP.NET Core, REST APIs) and related data accessOwn and evolve the backend architecture for our products, including RESTful APIs and Microsoft SQL Server (schema, queries, performance)Own API strategy: set standards for design, versioning, security, and cross‑team contracts, including third‑party integration surfacesEstablish and uphold team practices and guardrails for agentic‑IDE development (Cursor or similar), including review standards for agent‑generated codePartner with frontend (web and mobile), product, and design to define APIs and deliver cohesive, high‑quality featuresWork with DevOps on builds, releases, patching, and operational readinessReview code, handle merge requests, and help keep code quality, structure, and automation (testing, CI/CD) at a high barIdentify bottlenecks, debug production issues,



and improve reliability and performanceProvide technical estimates and communicate progress and risks clearlyLead and coach junior and intermediate developers; raise the bar through pairing and feedbackImprove engineering practices and processes (testing, observability, release discipline) in ways that fit the teamShare ownership of production health: monitor, respond to critical incidents, and drive fixes for instability or regressionsQUALIFICATIONSBachelor’s Degree in Computer Science or a related fieldTypically, 7+ years of .NET experience and/or other object‑oriented programming languagesExperience with Microsoft Visual StudioFamiliar with C#, WebAPIs, MVC, ASP.NETDeep RESTful API experience: owning API design, versioning, security, performance, and cross‑team contracts at scaleHabitual use of an agentic coding IDE (Cursor or similar) and a track record of setting review standards for AI‑generated code across a teamIn‑depth understanding of JavaScript programming and familiar with ES6Work effectively in a cloud‑based environment; experience with AWS is a solid plusFamiliar with object‑oriented design patternsFamiliar with RESTful APIsExperience with MS SQL Server and T‑SQL languageUnderstanding of SQL best practices and methodologies and experience investigating and solving SQL performance issuesProficient understanding of code versioning tools such as Git and the associated best practicesFamiliarity with Agile methodologies and experience with leading a scrum teamAND IT'S GREAT TO HAVEPrior exposure to fitness/wellness products, multi‑tenant SaaS, high‑traffic APIs, or cloud‑native tooling (containers,



observability)Experience designing and operating third‑party API integrations at scaleGeneral familiarity with a modern TypeScript / cloud‑native SaaS stack is a plus, but not requiredCompensation for this role will be determined based on a variety of factors, including relevant experience, qualifications, skills, geographic location, and market considerations. The anticipated compensation range for this position is $120,000.00 – $128,000.00 CAD annually. In addition to base compensation, eligible employees may be offered other forms of compensation, such as bonuses, commissions, equity, or other incentive programs, where applicable. Compensation and benefits may vary by location and are subject to applicable legal, business, and market requirements.WHAT’S IN IT FOR YOUPurpose‑led company with a values‑focused culture – Best Life, One Team, Growth MindsetTime Off – with our open PTO policy, we offer flexibility in how and when you take PTO!Days of Disconnect – once a quarter, we take a collective breather and enjoy a day off together around the globe.Parental & Pawternity Leave – we offer leave for when your family grows by two feet or four paws!Best Life Perk – we are committed to meeting you wherever you are in your fitness journey with a quarterly reimbursement.Medical/Dental/Vision coverageEAP – we get you help when you need it. Period.Premium Calm App – enjoy tranquility with a Calm App subscription for you and up to 4 dependents over the age of 16And more! – so many benefits we couldn’t even fit them all here!ABC is an equal opportunity employer committed to diversity, equity, and inclusion. We strive to create a workplace where every employee, client, and partner feels valued, inspired, and empowered to reach their full potential. For us, inclusion isn’t just the right thing to do—it’s a business imperative. Learn more at abcfitness.Com.#J-18808-Ljbffr

📌 Lead Software Developer - C$120,000 - C$128,000 A Year (Calgary)
🏢 ABC Fitness Solutions
📍 Calgary