Backend Engineer

About the Position

We are building a location-based mobile game where users purchase keys to hunt and open real-world chests using their phone camera. This is an early-stage MVP with clear scope, fast decisions, and direct access to the product owner.

Responsibilities7

• Design and implement backend architecture for the MVP
• Build REST APIs for user profiles & authentication, keys inventory & balance, geo-based chest discovery, chest opening, town-based statistics & leaderboard
• Design PostgreSQL schema with geospatial queries (PostGIS)
• Implement anti-cheat logic: distance validation, speed / teleport detection, race-condition protection
• Integrate Apple / Google sign-in
• Support in-app purchase receipt validation
• Work closely with Unity developer to define clean API contracts

Requirements8

• 4+ years of backend development experience
• Strong knowledge of PostgreSQL
• Experience designing REST APIs
• Understanding of transactional systems & data consistency
• Experience with Node.js (NestJS) or Go
• Familiarity with authentication flows (OAuth)
• Ability to work independently and make technical decisions
• Nice to Have: Experience with PostGIS or geo-based queries, Experience with mobile games or high-concurrency systems, Understanding of anti-fraud / anti-cheat patterns, Experience with cloud deployment (AWS / GCP / similar)