Performance Engineer — GraphQL & Unit Testing (Contract)

Energy Innovation Corp; Elgin (IL); On-site; USD 85,000 - 118,000; Full time

Job summary

Grant Thornton in Elgin, IL is seeking a Performance Engineer to own unit testing initiatives and make GraphQL performant enough that users do not notice. You will take full ownership of testing across the stack, applying MySQL expertise and CI/CD guardrails to deliver robust, scalable services.

This contract role emphasizes collaboration with a strong engineering team, code reviews to raise quality, and mentoring peers while expanding testing coverage and reliability in a mid-sized tech

Qualifications

• Must have a proven track record in unit testing initiatives.
• Demonstrated ability to translate tech requirements into testing guardrails.
• Strong communicator with experience presenting to leadership.
• Commitment to improving processes and technical excellence.
• Ability to collaborate across teams and mentor peers.

Responsibilities

• Own unit testing initiatives end-to-end.
• Apply MySQL and unit testing to solve engineering challenges.
• Stitch events into the testing pipeline feeding technology reports.
• Translate compliance rules into unit testing guardrails baked into the build.
• Guard code quality through reviews and pair-programming across teams.
• Architect fault-tolerant distributed systems leveraging Express.js.
• Question fast-moving GraphQL patterns and propose cleaner approaches.
• Collaborate with engineers in Elgin, IL on testing edge cases.

Skills

Unit testing

GraphQL performance

Distributed systems design

CI/CD practices

Tools

MySQL

Express.js

Job description

Grant Thornton in Elgin, IL is seeking a Performance Engineer to own unit testing initiatives and make GraphQL performant enough that users do not notice. You will take full ownership of testing across the stack, applying MySQL expertise and CI/CD guardrails to deliver robust, scalable services.

This contract role emphasizes collaboration with a strong engineering team, code reviews to raise quality, and mentoring peers while expanding testing coverage and reliability in a mid-sized tech