[Hiring] Principal Server Engineer @UserWise Services

Role Description

We're looking for a Principal Server Engineer to own the backend systems powering our live games - services currently supporting 1M+ DAU. You'll be responsible for performance, scalability, and reliability at the core of our infrastructure, working closely with the engineering team on everything from schema design to incident response.

Qualifications

• Experience: 8+ years
• Deep Go & Python expertise — language internals, execution models, and performance tuning (goroutine management, GC tuning, zero-allocation techniques)
• Strong PostgreSQL fluency — scalable schema design, query plan analysis, index strategy optimization, with real examples of resolving bottlenecks via data layout or query architecture changes
• Proven experience scaling systems supporting 350k+ DAU, with a horizontal-scaling-first philosophy (efficient serialization/deserialization via Protobuf/MsgPack, reduced lock contention)
• Hands-on profiling experience — identifying and resolving memory leaks, CPU spikes, and deadlocks
• At least 2 concrete examples of complex production performance issues or outages, including root cause analysis and resolution methodology
• At least 2 released production projects as a core backend engineer handling live traffic

Requirements

• Design, build, and maintain Go/Python backend services for live, high-traffic game titles
• Own database schema design and query performance across PostgreSQL systems
• Drive horizontal scaling strategy - optimizing CPU/memory footprint and reducing lock contention over vertical scaling
• Profile and resolve memory leaks, CPU spikes, and deadlocks in production
• Lead root-cause investigations for performance issues and outages, from detection through resolution
• Architect and maintain in-memory caching/state layers (Redis/KeyDB/Memcached)
• Design and run load tests to surface breaking points ahead of release

Benefits

• Market competitive, tax-free USD salaries
• Paid Time Off
• Annual Performance Reviews