Product Designer-Builder | StellarTech
Product designer-builder for StellarTech's Smartimi consumer mobile app: turns problems into flows, prototypes, and shipped UI, pairs with the PM, runs A/B tests in Amplitude, interviews users, and builds features with no-code/vibe-coding tools. Remote, full-time B2B contract at €4,500–5,500/month.
- Compensation
- €4.5K–€5.5K / mo
- Location
- Remote
- Work setup
- Remote
- Seniority
- Not specified
- Employment
- Contract
- Experience
- 3+ years
- Category
- Design
- Posted
Skills
Must have
- 3+ years in product design, with at least 2 (ideally 3) in consumer mobile apps; B2B-only backgrounds won't fit
- Strong, modern mobile UX and UI craft, demonstrated in portfolio
- Ownership: carry problems through without waiting for direction
- Product thinking: cares about product metrics and experiments, not only interface
- Experience running user interviews
- English at B2–C1 and Russian
- Clear, structured communication, including thinking out loud with the team
- Enjoys a high pace and takes direct feedback well
- Wants to build good things for users, not just hit numbers
Nice to have
- An app or side project you launched yourself
- Builder or no-code skills
Full description
Role: Product Designer-Builder
Company: StellarTech
Location: Remote. StellarTech has offices in Warsaw and Cyprus if you'd like to work from one. The team overlaps 10:00–16:00 CET. Search focus: Poland, Czech Republic, Romania, Serbia, Georgia, Kazakhstan, Armenia, Cyprus, Dubai and the wider Middle East; Western Europe is also possible. We can't consider Russia, Belarus or Ukraine at the moment.
Job Type: Full-time, B2B contract
Compensation: €4,500–5,500/month gross, paid in USD
About StellarTech
StellarTech is a self-funded multi-app company that launches consumer mobile products in different domains. It is profitable, moves at startup pace and is aiming for $1B in revenue.
You would join Smartimi, the company's biggest and most mature app, as the design partner of its PM, Darya. Around you: a content team that builds templates, a product analyst, engineers and QA. The Head of Product has a UX background himself. The team speaks Russian; the users speak English.
What you are expected to do:
- Take raw problems, ideas and initiatives and turn them into flows, prototypes and shipped UI for a consumer mobile app.
- Work as a pair with the PM, and own some initiatives fully, from idea to release to reading the numbers.
- Work directly with engineers and review the build before it ships.
- Run A/B tests, read the results in Amplitude and plan the next iteration.
- Talk to users: run interviews in English and launch quick surveys.
- Build features yourself with vibe-coding or no-code tools when that's faster. The team has a way to test and ship them.
Marketing banners and funnels are handled by a separate team, so they are not part of this role.
What you need to succeed:
- 3+ years in product design, with at least 2 (ideally 3) in consumer mobile apps. B2B-only backgrounds won't be a fit.
- Strong, modern mobile UX and UI craft. The Head of Product looks closely at portfolios, so yours should show it.
- Ownership: when a problem lands on your desk, you carry it through without waiting to be told the next step.
- Product thinking: you care about product metrics and experiments, not only the interface.
- Experience running user interviews. Usability testing and research methods can be learned on the job.
- English at B2–C1 and Russian.
- Clear, structured communication, including when you're thinking out loud with the team.