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Open nowPosted 13 days ago

Principal Server Engineer

Workable (global search)108,016 open roles

Where
Spain
Work mode
Remote
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Your applicationOpen nowPrincipal Server EngineerWorkable (global search) · Spain

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Early applications get read.

7.9% of postings close within 7 days. Measured by our own scanner across the market. Workable (global search) postings stay open a median of 7 days.

Share of postings closed within
  1. 1.6%1 day
  2. 3.6%3 days
  3. 7.9%7 days
  4. 14.9%14 days
  5. 34.0%30 days
This job: posted 13 days ago

Workable (global search) median: 7 days open

The posting

About the Role

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.

Experience: 8+ years

Nice to Have

  • CI/CD and DevOps experience (GitHub Actions, GitLab CI) plus monitoring/alerting (Prometheus, Datadog)
  • Strong grasp of networking protocols — WebSockets, gRPC/HTTP2, UDP/TCP tuning for low-latency real-time systems

Requirements

Responsibilities

  • 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

Requirements

Crucial

  • 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

Important

  • Hands-on experience with Redis, KeyDB, or Memcached — caching, rate-limiting, state management, including cache stampede mitigation, serialization overhead, and eviction policy design
  • Solid TDD/BDD judgment and practical load-testing experience (e.g., Artillery)
  • Practical experience with the Nakama framework — custom Go/Lua modules, matchmakers, storage engine, real-time multiplayer sockets
  • Practical GCP/Google App Engine experience — deploying, monitoring, and scaling serverless/container services

Benefits

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