Hello! We are Leaply - an ecosystem of interconnected digital and physical products designed to help people build healthy habits and improve quality of life. We’re building a portfolio of B2C products for global markets, including the US, Tier-1 countries, Europe, and beyond. In June 2024 we launched a new web platform for habit-building with a subscription model and performance-first marketing across Meta, Google, and TikTok. We started as a startup in 2024 and grew 10× in the last six months. In 2025, we’re aiming for another 5×. Demand is validated, and the user flow is steady. Next up: a mobile app that rethinks how habits are formed. At Leaply, we challenge traditional career paths - we value ownership over titles and impact over process. We move fast, think big, and expect everyone to contribute beyond their scope to build the next Ukrainian unicorn. To deliver on this vision, we’re hiring an autonomous Full Stack/Backend Engineer to join our Growth team and accelerate high-impact initiatives across the stack. What you’ll do — Collaborate with product, marketing, and design to shape and ship the first iterations of features that move business metrics; — Design, build, and operate backend services and APIs (Node.js, preferably NestJS) powering our subscription platform and habit-building experiences; — Work with GraphQL/REST, data stores, caching, and queues to deliver reliable, scalable functionality; — Deploy, monitor, and iterate in our cloud environment (GCP, Docker, Kubernetes), owning your code end-to-end; — Instrument analytics, support A/B tests, and integrate with third-party platforms (e.g., Meta/Google/TikTok ads, payments, email, attribution); — (If full stack) Contribute to our front end (React/Next.js) when needed to unblock delivery. What matters to us — 1+ years of commercial experience building web backends; — Strong with Node.js (NestJS or another framework); — Hands-on with GraphQL (or REST), SQL/NoSQL databases, and application architecture fundamentals; — Experience with Docker and CI/CD, GCP, Kubernetes is a plus); — A business-driven mindset: you connect code to revenue and growth, choose pragmatic solutions, and ship; — Ownership after release: you monitor, debug, and fix issues quickly; — You use AI in your workflow to move faster and think broader. Bonus points — Experience in startups or building services from scratch; — Exposure to marketing tech (ad platforms, attribution), payments; — Front-end skills with React/Next.js; — Observability/tooling (Sentry/Grafana), performance tuning, or cost optimization; — Familiarity with Kubernetes. What you can expect — Competitive compensation; — Office in Warsaw or Kyiv, plus perks (lunches, gym, health insurance); — Full ownership of your area and a real say in product and technical strategy; — Support from an experienced team with multiple successful exits; — Access to internal communities in tech, product, marketing, and payments; — A meaningful mission - helping people live better lives, every day. Leaply is backed by SKELAR, a venture builder with 10+ successful B2C businesses in its portfolio. SKELAR provides world-class payment infrastructure for our model, plus financial and legal support across target regions, and runs internal clubs focused on professional growth in marketing, engineering, and payments - there’s always someone to learn from or lean on. Beyond business, SKELAR supports the SKELAR Foundation, a charitable initiative created by employees to support the Ukrainian Armed Forces - funding large projects that bring us closer to victory. Join us and help build the next big everything!