The opportunity timeline

• Overview

  Costco is hiring a Performance Engineer in Manhattan, KS.

• Role description

  Costco pays $100,000 - $141,000 for a Performance Engineer in Manhattan, KS who can hold a gRPC design in their head and still see the gaps. At its core, this is a senior Performance Engineer job in KS that rewards 7 years with $100,000 - $141,000 and room to run.

  Key Responsibilities

  • Lead Express.js design reviews that catch the costly mistakes before Manhattan, KS builds them
  • Respond to on-call rotations and participate in incident postmortems
  • Translate the proudly-nerdy Kotlin outage into fixes that make the next Manhattan launch dull
  • Identify bottlenecks and propose architectural improvements proactively
  • Wrangle gRPC config across environments so Manhattan staging mirrors production
  • Keep Costco's Java dependencies patched before the CVEs become incidents
  • Ensure code quality through automated linting, testing, and static analysis
  • Trim Costco's cloud bill by right-sizing the Accountability infrastructure in Manhattan, KS

  What You'll Bring

  • A collaborative mindset and genuine enthusiasm for teamwork
  • Detail-oriented approach with a commitment to accuracy
  • Comfort being the newest person in the room and the loudest in the notes
  • The discipline to document while it's fresh, not after it's forgotten
  • Clarity of thought that shows up in tidy documentation

  The reputation Costco enjoys across KS wasn't bought; the spirited-and-grounded Manhattan team earned it one technology project at a time. We move fast on Communication but slow down whenever someone says they feel rushed past good judgment.

  Beginning at $100,000 - $141,000, your growth is mentored, your benefits are full, and your hours flex to match life in Manhattan, KS.

  The listing got a same-day refresh, so consider it live and ready.

  Submit your resume today and take the first step toward joining Costco.

• Required skills

  • Express.js
  • Jest
  • gRPC
  • MySQL
  • Kotlin
  • Java
  • Communication
  • Accountability

• Benefits & perks

  • Home Office Setup
  • 529 college savings plan
  • Happy hours and social events
  • Supplemental life insurance
  • Company retreats
  • Employee Discounts
  • Professional association memberships
  • Free Meals
  • Comprehensive health insurance

• Apply before 2026-08-14

  Submit your application for this Full-time technology position.