Sr. Software Engineer - Infra Storage Cache | Roblox

As a Senior Engineer on the Cache team (part of the Infra Storage organization), you will innovate and operate large-scale, in-house distributed systems designed to deliver sub-millisecond average latency, horizontal scalability, and high efficiency— targeting infrastructure capable of supporting 1 billion Daily Active Users while reducing costs by 90%. Reporting directly to the Engineering Manager for the Cache team, you will lead the architectural transition to a next-generation, multitenant caching service built on ValKey, eliminating cluster lifecycle onboarding overhead, solving massive-scale bottlenecks, and driving 99.99%+ availability for 24x7 mission-critical services.

Key Responsibilities

Architectural Strategy & Distributed Systems Optimization

• ValKey Multitenant Architecture: Lead the architectural transition to a next-generation multitenant caching service built on ValKey, enforcing strict resource, data, and failure isolation across all tenant services.
• Systemic Bottleneck Mitigation: Drive systemic optimizations to eliminate head-of-line blocking, resolve hot key imbalances, and maximize CPU and memory utilization across physical machine clusters.
• High-Availability & Chaos Engineering: Design and deploy automated development frameworks, telemetry monitoring, and chaos testing (fault/latency injection) for mission-critical systems targeting 99.99%+ availability.
• Containerized Active/Active Infrastructure: Run and scale Active/Active distributed systems deployed on container orchestration platforms such as Kubernetes or Nomad.

Engineering Rigor & Technical Mentorship

• Engineering Standards: Lead technical design reviews, performance benchmarking, failure drills, and blameless post-incident retrospectives to continuously improve platform resilience.
• Technical Mentorship: Mentor and empower engineers across the team, building deep domain expertise and driving cross-functional alignment across Storage, Platform, and Product engineering orgs.

Requirements

Technical Depth & Engineering Fundamentals

• Education & Experience: Bachelor of Science in Computer Science (or equivalent practical experience) with 6+ years of hands-on software engineering experience building and operating large-scale distributed systems.
• Programming Proficiency: Strong, hands-on programming experience in Go and C++.
• Distributed Infrastructure Chops: Proven track record running Active/Active distributed systems on container orchestrators (Kubernetes or Nomad).
• Scale Problem-Solving: Demonstrated success resolving scale bottlenecks (e.g., gossip protocol limits, partial network failure modes in distributed topologies).
• Telemetry & Observability: Hands-on operational experience with modern observability stacks (Prometheus, Grafana, AlertManager, Kibana).

Preferred Qualifications

• Open-source contributions to or maintenance of major caching ecosystems (Redis, ValKey, Memcached).
• Advanced cache internals expertise (e.g., custom Redis modules written in C/Rust, Lua scripting, or deep-tuning memory allocators like jemalloc).
• Experience with caching proxy layers (Twemproxy, Envoy Redis filter) and multi-tiered caching topology design.

Total Rewards & Benefits

• Compensation & Equity: San Mateo base salary range ($243,290 – $295,250 USD) + competitive Roblox equity compensation.
• Healthcare & Wellbeing: Comprehensive health, dental, and vision insurance packages for employees and eligible dependents.
• Onsite Perks & Campus: Modern San Mateo headquarters featuring daily catered meals, team events, and state-of-the-art technical setups.
• Time Off & Retirement: Generous vacation policies, paid company holidays, paid parental leave, and 401(k) matching programs.