Itentio IT Recruitment
We are partnered with one of the fastest-growing startups in the SportTech space, building a mobile-first platform that makes regular physical activity as addictive and effortless as scrolling social media. Their app brings together thousands of fitness classes (yoga, pilates, crossfit, barre, dance, and more) into one seamless experience — one click to book, zero friction, real habit-building motivation. Backed by strong early traction and a highly experienced founding team, they are now looking for a Full-Stack Software Engineer to help shape the core product from early stage to scale.
Whom are we looking for – Full-Stack Software Engineer
Location: Poland (100% Remote)
Brief company description
Our partner is redefining how people discover, book, and stay consistent with sports and wellness activities. They are creating a consumer app that combines the best elements of Duolingo-style habit formation and TikTok-level engagement with real-world fitness classes and studios. The engineering team is small, fast-moving, and works directly with the founders. This role is critical in building and shipping features end-to-end that users actually love and come back to every day.
Why is it worth joining this company?
- Product-Oriented Impact at Scale – You won’t just write code — you’ll co-create features that directly influence user behavior and real-world health habits.
- Extreme Ownership Culture – Full responsibility for features from idea to launch, no tickets, no bureaucracy. You decide what gets built and own the outcome.
- Early-Stage Excitement with Strong Founding Team – Join a high-potential SportTech startup at the perfect moment — fast iteration, real influence, and the chance to grow with the company.
- Flexible & Trust-Based Work – Remote-first, fully async. Results matter more than hours.
- Real Equity Upside – Competitive salary + meaningful ESOP in a startup with genuine product-market fit.
- Rapid Growth & Learning – Quick raises based on impact, plus exposure to modern tools and a culture that values speed, clarity, and delight.
Full-Stack Software Engineer – Key Responsibilities
- Design, build, and ship new features end-to-end (backend, frontend, and mobile support) that users actually use and love.
- Quickly ship, analyze real user data and feedback, then iterate fast to improve outcomes.
- Develop and scale the backend using Supabase, PostgreSQL, TypeScript, and Python.
- Work on the frontend with React / Next.js and help evolve the Flutter mobile app.
- Build and automate internal processes (CI/CD, workflows, DevTools, n8n).
- Collaborate directly with founders on product priorities, feature decisions, and roadmap.
Full-Stack Software Engineer – Main requirements
- Minimum 1.5+ years of experience as a backend or full-stack developer.
- Strong product mindset — you think in terms of user impact and business outcomes, not just perfect architecture.
- Proven ability to take full ownership of a feature from concept to production and measure its success.
- Comfortable in a dynamic early-stage environment where requirements change quickly and you’re expected to challenge assumptions with data.
- Strong communicator who can defend ideas but also change direction when evidence shows a better way.
- Fluent in Polish or English (comfortable working in either).
- Fast learner who can pragmatically use new tools and technologies.
Tech stack:
- Backend: Supabase, Serverless, TypeScript, Node.js, Deno
- Frontend: Next.js, React, Vercel
- Mobile: Flutter
- Payments: Stripe
- Data & Analytics: PostgreSQL, Python, Marimo, Algolia, PostHog
- CI/CD & Tools: Docker, GitHub Actions, Twilio, Slack, OpenAI, n8n
You don’t need to be an expert in everything – what matters most is the ability to learn quickly and ship pragmatic, high-quality solutions.
Full-Stack Software Engineer – What is in it for you?
- Competitive salary: 10,000 – 16,000 PLN net/month on B2B (for an ideal fit candidates can be up to 18,000 PLN on B2B)
- ESOP (equity package) with strong upside potential
- Possibility of quick salary increase in the short term based on impact
- Fully flexible schedule – you can have 50% or 100% commitment (part-time or full-time), work from anywhere
- Equipment budget and modern tools provided
- Real influence on product direction in a high-energy, product-obsessed startup
- Chance to work with a strong founding team on an exciting, meaningful product that helps people move more and enjoy life better
The Next Step for you:
If you’re a product-oriented engineer who wants to take ownership, ship fast, measure real user impact, and build something people genuinely love using, and you’re excited by the idea of joining an early-stage SportTech startup with a top-tier founding team – apply via the contact form below. We look forward to hearing from you!
Itentio IT Recruitment privacy and equal opportunity statements:
By submitting the recruitment application, you consent to the processing of your personal data contained therein. The controller of your personal data is Vladyslav Muzhylivskyi operating under the business name Vladyslav Muzhylivskyi Itentio with its registered office in Kraków (Tax ID: 6751522794). Personal data will be processed in order to carry out the recruitment process for the position specified in the job offer, including for the purpose of assessing the qualifications for work in this position. You can withdraw your consent at any time, which, however, does not affect the legality of the processing that was carried out on its basis before its withdrawal. You have the right to request access to your data, to rectify it, delete it or limit its processing, as well as the right to transfer your personal data, the right to object to data processing and the right to lodge a complaint with the supervisory authority for the protection of personal data. Additional information on the processing of personal data is in our Privacy Policy available at https://itentio.com/privacy-policy/.
Please note that all applications are treated with strict confidence. Itentio IT Recruitment will never share your data outside our organization without your written consent. Itentio is an equal-opportunity recruitment company and values diversity at our company. We do not discriminate based on race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
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