AVYVERSE

Backend Engineer (Location-Based Mobile Game / AR)

About the Project
 

We are building a location-based mobile game where users purchase keys to hunt and open real-world chests using their phone camera.

Each chest can be opened only once globally, which makes backend logic, geo-queries, and data integrity critical.

This is an early-stage MVP with clear scope, fast decisions, and direct access to the product owner.

Responsibilities

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

Technical Requirements (Must Have)

• 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)

What This Is NOT

• This is not a large corporate project
• No heavy bureaucracy
• No 10-layer approval process
• You will not “just implement tickets” — you will shape the system
   

Engagement Format

• Full-time preferred
• Remote
• Direct communication with founder / product owner

About AVY

AVY is a gamified fitness & lifestyle app built around 3D avatars, progression, and competitive duels.

Duels are a core mechanic, not a side feature — they must feel responsive, clear, and satisfying.

This role owns the duel gameplay experience end-to-end.

Responsibilities

• Design and implement duel mechanics in Unity
• Work with 3D avatars:
  • animations
  • animator Controllers
  • state machines
• Implement combat / duel flow:
  • start → action → resolution → result
• Camera logic for duels (angles, transitions, focus)
• Integrate duel logic with backend / game state
• Optimize performance for mobile devices
• Collaborate with designers & product on balance and feel
   

Technical Requirements (Must Have)

• 4+ years of Unity experience
• Strong experience with 3D gameplay systems
• Deep understanding of:
  • Animator
  • state machines
  • gameplay timing & responsiveness
• Experience shipping mobile games (iOS / Android)

• Clean, maintainable code

   

Nice to Have

• Experience with competitive or combat systems
• Experience with avatar-based games
• Experience optimizing animations for mobile
• Tech-artist sensibility (materials, prefabs)
   

This Role Is NOT

• UI-only
• Asset import only
• Casual Unity scripting
   

This is core gameplay ownership.