Software Engineer III , Caching

About this role

Box seeks a Software Engineer III to design and operate mission-critical caching infrastructure serving tens of millions of requests per second. You'll lead the migration to next-generation caching solutions while partnering with internal teams to solve scale, performance, and reliability challenges across the platform.

What you'll do

• Architect and develop next-generation caching solutions to replace existing Memcached and Redis fleets
• Design solutions for scale, performance, and resilience in a system handling tens of millions of requests per second
• Collaborate with client teams to understand traffic patterns and recommend caching strategies
• Maintain production-critical caching services and drive continuous reliability improvements
• Participate in technical design reviews and shape the team's architectural direction
• Participate in on-call rotation to respond to and triage production issues

What they're looking for

• Distributed systems design and architecture
• Algorithms and data structures
• Java or Scala (JVM-based languages)
• Caching platforms (Memcached, Redis)
• High-scale systems and performance optimization
• Production operations and incident response
• Code design principles
• System reliability and scalability

Benefits

• Impact 40+ million users through mission-critical infrastructure work
• Work on cutting-edge distributed systems challenges at massive scale
• Collaborate with engineering teams across the organization
• Minimum 3 days per week in-office at Redwood City headquarters

Likely interview questions

• Walk us through a time you designed or optimized a caching layer for high-throughput systems—what challenges did you face?
• How would you approach migrating a large production caching fleet (Memcached/Redis) with zero downtime while serving tens of millions of requests per second?