Senior Software Engineer (Storage Cache)

Join Roblox as a Senior Software Engineer on the Cache team, where you will lead the architectural transition to a next-generation, multitenant caching service. You will drive systemic optimizations, design and build robust frameworks for automation and monitoring, and champion engineering best practices. You will also mentor and empower engineers, fostering a culture of deep domain expertise and knowledge sharing.

• Lead the architectural transition to a next-generation, multitenant caching service built on ValKey, ensuring strict data, resource, and failure isolation for all tenants.
• Drive systemic optimizations to mitigate head-of-line blocking, manage hot keys, and maximize CPU and memory utilization across physical machine clusters.
• Design and build robust frameworks to automate development, chaos testing (fault/latency injection), and monitoring for 24x7 mission-critical services, targeting 99.99%+ availability and elastic scalability.
• Experience & Education: A BS degree in Computer Science (or equivalent professional experience) with at least 6+ years of hands-on software engineering experience
• [Bonus] Caching Proxies & Topologies: Experience with caching proxies (e.g., Twemproxy, Envoy Redis filter) and designing complex, multi-tiered caching architectures
• [Bonus] Open Source Contributions: A track record of contributing to or maintaining major open-source caching projects such as Redis, ValKey, or Memcached
• Programming Proficiency: Strong, hands-on programming experience in Go and C++
• Infrastructure Chops: A strong builder mindset with proven experience running Active/Active distributed systems on container orchestrators like Kubernetes or Nomad
• Observability Skills: Hands-on experience with modern telemetry and observability stacks (e.g., Prometheus, Grafana, AlertManager, Kibana)
• Problem-Solving Track Record: Proven success in resolving massive-scale bottlenecks, such as overcoming the limitations of decentralized Gossip protocols or mitigating partial failures in distributed systems
• Distributed Systems Expertise: Deep domain knowledge in building and operating large-scale distributed systems
• [Bonus] Advanced Cache Internals: Experience extending cache functionality (e.g., writing custom Redis modules in C/Rust, complex Lua scripting) or deep-tuning underlying memory allocators like jemalloc