About Rapidata
Rapidata provides a programmatic API to human intelligence, transforming how data is generated and annotated for AI. Instead of relying on fixed workforces, we distribute micro-tasks at internet scale through digital ad infrastructure.
These tasks, called Rapids, are interactive human feedback units delivered inside mobile apps in place of ads. Through a simple API call, customers submit data for evaluation, labeling, or validation, and receive real-time responses from a globally distributed crowd.
The Role
We are looking for an experienced game/product designer with exceptional behavioral design instincts. You've built consumer loops that get people to do something, and keep doing it. Your mission is to maximize the quality and volume of human responses per user, designing the ~30s Rapid interaction so people are drawn in, respond well, and come back for more. You will iterate fast at scale (millions of users daily) and own changes end-to-end, from concept to shipped impact.
Primary surface: Rapid (end-user app), onboarding, motivation, trust, retention
Impact: Increase engagement, completion rates, and response quality; reduce confusion and drop-offs
Working style: High ownership, ship weekly, test-and-learn with instrumentation
Team: Close collaboration with engineering and ops. You drive the UX direction
Seniority: Senior / staff-level product designer profile
What You Will Own
User (annotator) engagement with Rapids
Improve annotator experience, perceived reward, and retention
Experimentation: build new features, measure qualitatively and quantitatively, learn what to iterate on next
Motivation and incentive mechanics: design feedback, rewards, progression, and challenge so people want to continue
Key Responsibilities
Own and ship a new Rapid onboarding experience, from first impression to first completed Rapid, including microcopy, guidance, and clear progress signals.
Own the core micro-loop: hook, response, reward inside 30 seconds. You design the moment-to-moment mechanics that turn an idle app-user into a high-quality respondent, and the reward schedules that bring them back.
Build a behavior-first activation engine: define hypotheses, design fast experiments, ship weekly, measure impact, and iterate relentlessly.
Design engagement and reward loops using proven consumer mechanics (variable rewards, streaks, progression, and momentum) informed by best-in-class mobile games and high-retention consumer apps.
Increase completion and repeat usage by reducing friction, improving pacing, clarifying feedback, and making every step feel intentional.
Who You Are
This role is for someone who loves behavioral design and gets energized by shipping frequently, learning from data, and seeing their work reach millions of people.
Must-have
Deep intuition for psychology / behavioral economics applied to product design (motivation, trust, reward).
Proven track record shipping high-retention consumer experiences (e.g. social casino, RMG, hyper-casual, or similar) with quantified retention/frequency lifts.
High ownership: you independently drive projects from problem framing to shipped iterations.
Fast iteration mindset: you prefer shipping and testing over perfecting in isolation.
Fluent in the mechanics of habit and reward: intermittent reinforcement, the Hook model, Fogg behavior model, reward-schedule design.
Strong collaboration with engineers; you can design within constraints and still deliver delight.
Nice-to-have
Experience designing for massive scale (millions of daily users) and running high-tempo experimentation.
Familiarity with fraud/trust/safety patterns in consumer products, or a behavioral economics research background.
What We Offer
Competitive salary and equity in a startup with strong growth and IP, backed by top-tier VCs
Opportunity to join a fast-growing startup early, giving you an outsized chance to shape where the company goes
Opportunities for personal and professional growth as our team expands
Fun and open startup culture
Spacious office with mountain views in Zürich Center near Sihlcity (3 min from Binz train station). Large terrace with table tennis, pizza oven, hammock, and a BBQ
Hardware budget tailored to your preferences
Unlimited snacks and drinks of your choice