Werkstudent Backend Engineer (m/w/d) - Founding Team
Core
Design and build the backend payment engine (transaction flows, wallet management, SEPA Instant settlement, KYB/KYC, compliance exports) and contribute to React Native mobile apps.
Role type
Founding Backend Engineer (Payments & Mobile)
Builds
Production-grade payment infrastructure and consumer/merchant mobile applications
Domain
Fintech / Payments / SEPA Instant / Compliance
Deliverable
production ML models | product features | infrastructure
Required skills
Backend engineering, database design, API development, data consistency, system reliability, React Native, R-transaction handling, reconciliation pipelines
Preferred skills
AI tooling integration, code generation, automated testing
Technologies
React Native, SEPA Instant, DATEV, Kassenbuch, GoBD, fiskaltrust, REST APIs
Responsibilities
Design and build the backend payment engine, own KYB/KYC integration and compliance export layer, build REST APIs for financial-grade reliability, contribute to mobile apps, own full lifecycle from development to deployment
Seniority
Junior/Student (Founding Team)