Hybrid Test Engineer: Scale WebdriverIO & Automation

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

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.