Rock&Apps is looking for a Middle Frontend Developer 🚀
We are looking for a Middle Frontend Developer to join our team and work on web products with a strong focus on payment flows, integrations, and conversion funnels.
Location: Warsaw
Job Type: Full-time, office
Seniority: Middle
What you’ll do
Develop and maintain funnels using React, TypeScript, Vite, and Next.js.
Build and launch landing pages, websites, and multi-domain projects for paid traffic.
Design and implement product analytics events across funnels and identify and eliminate tracking gaps.
Diagnose production issues such as passrate drops, SDK timeouts, and stuck loaders using logs and event CSV data.
Conduct code reviews, mentor junior developers, and maintain documentation for payment integrations.
What we’re looking for
3+ years of commercial Frontend Development experience.
Strong knowledge of React, TypeScript, and Next.js.
Ability to design and implement analytics events.
Extra points if you have
Experience integrating PSPs through a custom payment flow (Stripe Elements/Payment Intents, Primer, Solid, Adyen, or similar) rather than only hosted checkout, including upsells, retries, and decline handling.
Experience with Apple Pay on the Web, including merchant validation, domain configuration, and WebView limitations.
Experience with Cloudflare and fast deployments.
Experience working closely with marketing: implementing analytics, running A/B tests (paywalls, landings), and understanding paid traffic metrics such as passrate and refund rate.
Previous mentoring experience.
What We Offer
A fast-growing environment with minimal bureaucracy and space for your ideas.
Opportunities for professional development and career growth.
18 paid vacation days.
10 paid days off.
Benefit Bar — choose the benefits that matter most to you.
A comfortable, well-equipped office with everything you need for a productive workday.
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