Senior Performance Engineer, Windows

Palo Alto, CA

What's the best way to achieve the fastest standing quarter mile? More horsepower? Better traction? Adding lightness? As a performance engineer you will be responsible for driving and establishing the critical performance metrics for MongoDB, from macro benchmarks through workload characterizations. You will work with cutting edge customers (internal & external) to characterize what is changing in the software, capture and analysis of results and determine how to achieve a set of performance goals (code changes, application changes etc.). You will determine and recommend changes to the core kernel to improve the performance. You need to be hands-on and drive building frameworks, workloads and understanding customer performance and capacity planning issues. You have to be considered by your peers and in the wider a community an expert in the Windows O/S and performance characterization of the various flavors.

  • Build tools to generate loads with a precise mix of operations and measure response times, throughputs and correctness of responses during load testing
  • Create a library of large scale topologies that can be deployed to the cloud or physical environments
  • Create a library of loads to run against target systems (strew, soak)
  • Measure system performance (response times, throughputs etc) and compare across builds to provide early warning of degraded performance
  • Deliver recommendations on how code needs to change, refactored to improve performance 


  • Bachelor’s Degree in Computer Science, Math, or Engineering
  • 6+ years hands-on experience in performance testing, data collection, analysis and workload characterization, bottleneck identification, and capacity planning
  • Experience diagnosing the full stack; application, database, o/s, storage, and network layers
  • Experience with large-scale, large volume, distributed 24x7 systems supporting millions of transactions / sec
  • Experience in applying appropriate mathematic modeling techniques in deriving and validating projected performance improvement
  • Excellent written and verbal communications skills; not afraid of standing in front of 100+ of your peers to discuss and defend your findings
  • Excellent Programming knowledge of (C or C++ preferred, Java / Scala ok)
  • Excellent scripting skills (Shell, JavaScript, Python or Go)
  • Must be an expert in the Windows O/S (UNIX/Linux a bonus)
  • Must have strong problem-solving skills
  • Should have experience with cloud providers (Amazon EC2, Azure, Joyent , Rackspace, Softlayer)
  • Should have database experience (SQL or Non-relational)
  • Should have experience with/knowledge of hypervisor technologies (KVM, VMWare, Xen or Hyper-V)