Full Stack Engineer

About WTFWTF is India’s most ambitious fitness technology company — building a connected ecosystem of physical gyms, digital platforms, AI automation, and data-driven fitness intelligence. We don’t build websites or apps — we build products that run a real business: 500+ gyms, thousands of members, millions in transactions, and a full tech layer that powers everything.We are replacing conventional developers with AI-native builders — people who can understand a business use case, think through logic, visualize architecture, and then write code that works, scales, and delights.The Mindset We’re HiringYou’re not the kind of person who asks “What’s the API doc?” You ask — “What’s the user journey? What’s the logic flow? How do we automate this?”You’re the kind who:Builds systems end-to-end without waiting for dependencies.Thinks in business logic before writing syntax.Uses AI tools daily to move 5x faster.Knows when to code, when to automate, and when to rethink the problem entirely.Cares about how products feel — not just how they run.This role isn’t about pushing commits; it’s about owning systems.Your Core Responsibilities1. Product Architecture & OwnershipTake a business problem or feature request and translate it into complete architecture — backend, frontend, and database.Design data flows, user journeys, state management, and API logic.Build modular, future-proof systems — not code piles that need daily firefighting.Think edge cases, failure scenarios, and recovery flows before writing the first line.2. Full Stack ExecutionOwn both backend (Node.js/Express) and frontend (React + TypeScript) — no handoffs.Design scalable APIs and data models on PostgreSQL; write migration-safe schemas.Implement real-time systems (Socket.IO, WebRTC, etc.) where needed.Manage local dev with SQLite and deploy to AWS/Fly.io using proper environment configs.3. AI-Native EngineeringUse AI coding tools natively — Cursor, GitHub Copilot, Claude Code, etc.Integrate AI APIs (OpenAI, Together AI, Gemini, Bland AI, ElevenLabs) directly into workflows.Automate logic, workflows, or monitoring where AI makes sense — not as a gimmick, but as leverage.4. Product Thinking & UX AwarenessCollaborate with design and product only for direction — not dependencies.Think about how users will interact with your feature — not just what they’ll click.Understand micro-interactions, loading states, and real-world behavior.Prototype logic in tools like Lovable.dev or Figma and ship independently.5. Cloud & Infra ResponsibilityDeploy and maintain systems on AWS (EC2, S3, RDS, CloudFront) or Fly.io.Handle production environments, backups, scaling, and uptime with confidence.Write secure, env-driven, production-ready configurations.Optimize for speed and cost, not comfort.6. Culture & SpeedCommit daily. Ship weekly. Automate everything.No blockers, no blame. You find solutions.Review code not for style, but for clarity, modularity, and reasoning.Mentor others to think like product engineers, not coders.Tech StackFrontend: React 18, TypeScript, Vite, Tailwind CSS, shadcn/ui, Framer MotionBackend: Node.js (Express), REST APIs, WebSockets, GraphQL (optional)Database: PostgreSQL (RDS), Prisma ORM, SQLite (local dev)Infra: AWS / Fly.io / Docker (coming), GitHub CI/CDAI/Automation: OpenAI, Together AI, Gemini, Bland AI, Make.com, WWebJSDev Environment: Cursor IDE, Lovable.dev, GitHub Projects, PostmanWhat You’ll Build (Examples of Real Work)WTF WhatsApp AI Bot — Node + React + Socket.IO dashboard.Recruitment & HRMS Platform — full-stack system for hiring and payroll.CCTV AI Compliance Engine — real-time video + AI analysis dashboard.Sales AI Bot Integration — live call intelligence with Bland AI.Revenue Intelligence CRM — unified system across gyms, leads, and retention.Each of these is an actual live project — you’ll own one from day one.Who You Are6–10 years of experience (startup or high-growth preferred).Strong command of JavaScript/TypeScript and modern frameworks.Experience building real products, not just projects.Ability to write clear logic for real-world use cases (not textbook code).Self-driven, outcome-oriented, and obsessed with clarity and detail.Passionate about automation, AI, and the future of tech-driven businesses.Excellent communication and documentation habits.Performance MetricsTime-to-ship (not just commit frequency)Uptime, speed, and bug rate of owned modulesAI-assisted velocity and reduction of manual codeIndependence in feature deliveryBusiness impact of your build (measurable usage/adoption)Why WTFDirect access to the Founder — no bureaucratic layers.Freedom to build products that affect real people daily.A culture that celebrates clarity, creativity, and execution speed.Real ownership — not tickets.The opportunity to define the architecture of India’s fastest-growing fitness tech OS.Apply If You’reA builder, not a maintainer.A thinker, not a follower.Someone who can design, code, and deploy — end to end.Someone who wants to own systems, not fix bugs forever.