Test Engineer

Energy Innovation Corp; Springfield (MO); Hybrid; USD 70,000 - 108,000; Full time

Job summary

McKinsey & Company in Springfield, MO is seeking a mid-level Test Engineer to hunt down complexity, refactor it out of existence, and help ship reliable software.

You will own the WebdriverIO subsystem, work with Sauce Labs behind feature flags, and collaborate across teams on end-to-end testing and performance improvements. Beginning at $70,000–$108,000, this hybrid role offers growth, mentoring, and a flexible schedule.

Qualifications

• Portfolio or work samples demonstrating technology expertise.
• Growth mindset and openness to feedback.
• Curiosity to learn new tech and share credit.

Responsibilities

• Tune WebdriverIO queries to reduce MO database timeouts under load.
• Push Sauce Labs changes behind feature flags to enable quick Springfield, MO rollbacks.
• Own the WebdriverIO subsystem and ensure reliability across teams.
• Manage full lifecycle from prototype to production.
• Identify and prevent Sauce Labs anti-patterns in code reviews.
• Scale data pipelines processing millions of events with WebdriverIO.
• Balance learning investments with product timelines and constraints.
• Strengthen TDD processes to pass MO audits.

Skills

Test automation

WebdriverIO

Sauce Labs

Performance tuning

Job description

Some engineers tolerate complexity; the Test Engineer we want at McKinsey & Company hunts it down and refactors it out of existence. A hybrid Test Engineer post in Springfield that values Innovation over 4 years, pays $70,000 - $108,000, and never boxes you in.

Key Responsibilities

• Tune WebdriverIO queries until the MO database stops timing out under load
• Push Sauce Labs changes safely behind flags so Springfield, MO rollbacks take seconds
• Own the autonomy-rich WebdriverIO subsystem that the rest of McKinsey & Company quietly depends on
• Own the full lifecycle of technology systems from prototype to production
• Spot the performance-driven Sauce Labs anti-pattern in review before it spreads through McKinsey & Company
• Scale data pipelines processing millions of events with WebdriverIO
• Negotiate Continuous Learning tradeoffs with product when McKinsey & Company timelines and reality collide
• Harden McKinsey & Company's TDD auth so the MO audit comes back clean

What You'll Bring

• A portfolio or work samples that demonstrate your technology expertise
• A growth mindset that treats feedback as fuel, not threat
• A point of view on McKinsey & Company's space, sharpened by your own reading
• A collaborator's reflex to share credit and absorb blame
• Real Test Automation chops, plus the Persuasion curiosity to keep growing
• Ability to learn new technology systems quickly and apply them effectively
• Comfort being measured against a clear mid-level bar

What began as two engineers and a whiteboard in Springfield is now McKinsey & Company, an underdog-spirited team obsessed with getting Test Planning right. We give mid-level hires room to fail small so they can later succeed big on technology work.

Beginning at $70,000 - $108,000, your growth is mentored, your benefits are full, and your hours flex to match life in Springfield, MO.

New applicants this week join a hiring cycle that is already in motion.

We welcome applications from driven professionals ready to make an impact.