Backend Engineer - Java | Spring Boot | WebSocket | PostgreSQL

About the Role

Were building a real-time, multiplayer game played by millions. As a Backend Engineer, youll design and scale the core game server that handles matchmaking, game state, physics sync, chat, leaderboards, and anti-cheat all in real-time with low latency.

Role & responsibilities

• Design & develop scalable, low-latency game server architecture using Java, Spring Boot, WebSocket/Netty
• Implement core game logic: turn management, striker physics validation, coin pocketing rules, foul detection, win/loss conditions
• Build real-time systems: matchmaking, room management, player session handling, spectator mode using Redis + pub/sub
• Ensure data consistency for game state across distributed servers with strong concurrency control
• Integrate anti-cheat mechanisms: server-side physics validation, move replay verification, anomaly detection
• Optimize for scale: Handle 100k+ CCU with 50ms tick rate using efficient threading, connection pooling, and caching
• Develop APIs for game clients, analytics, wallet, leaderboards, tournaments, and social features
• Work with DevOps on deployment, monitoring, and alerting using Docker, K8s, Prometheus, Grafana
• Collaborate with Unity/game client, QA, product, and data teams to ship features fast
• Write unit/integration tests and maintain high code coverage with JUnit, Mockito

Must-Have Skills

• 4+ years backend development experience with Java 8/11/17, Spring Boot, Maven/Gradle
• Strong grasp of DSA, OOP, Design Patterns, Multithreading, Concurrency
• Experience with WebSockets, TCP/UDP, Netty or similar for real-time communication
• Hands-on with Redis for caching, pub/sub, leaderboards; MySQL/PostgreSQL for persistence
• Knowledge of message queues: Kafka/RabbitMQ for async events like analytics, rewards
• Understanding of game server concepts: tick rate, delta compression, client-server reconciliation
• Experience building RESTful APIs and working with microservices architecture
• AWS/GCP experience: EC2, EKS, S3, ElastiCache, RDS
• Strong debugging and profiling skills JProfiler, VisualVM

Good-to-Have Skills

• Prior experience in real-time multiplayer games: Ludo, Chess, Pool, Rummy, etc.
• Knowledge of physics engines or collision detection logic
• Experience with NoSQL: MongoDB, Cassandra for player data
• Docker, Kubernetes, CI/CD pipelines, Git
• Understanding of fraud detection, bot detection, rate limiting
• Familiarity with load testing tools: JMeter, k6, Gatling

Qualifications

• B.E/B.Tech/M.Tech in Computer Science or related field
• Experience in high-scale consumer apps or gaming is a strong plus

What We Offer

• Work on a game played by millions daily
• High ownership your code directly impacts gameplay
• Fast-paced gaming environment with 1s matchmaking targets

Preferred candidate profile

Candidate must have worked services for game/multiplayer

Note:-

Candidate below 4years experience please don't apply

This is remote opportunities, candidate must use their own laptop.

Apply only you have experience in webSocket