Ruby Software Engineer — Hybrid, Mentorship & Impact

Energy Innovation Corp; Milwaukee (WI); On-site; USD 74,000 - 110,000; Full time

Job summary

Energy Innovation Corp is seeking a Software Engineer in Milwaukee with a strong Ruby background to build resilient distributed systems and own the development of experiments. The role emphasizes test-first mindset, mentorship, and customer-focused collaboration across teams.

You will pair with engineers locally, analyze Jest metrics, and translate ideas into production-ready prototypes, driving latency improvements and system reliability in a hybrid work model.

Qualifications

• 3+ years of Flexibility reps, not just Flexibility exposure.
• Demonstrated capacity to mentor or support mid-level teammates.
• The kind of curiosity that reads the docs before asking.
• Customer-focused outlook with strong interpersonal skills.
• Ability to unblock others and work well in a team.

Responsibilities

• Ship Flexibility experiments fast, kill the losers, and double down on what sticks
• Architect fault-tolerant distributed systems leveraging Ruby and Flexibility
• Translate Jest metrics into the one chart Amazon leadership checks each morning
• Pair-program tricky Ruby edge cases with engineers across Milwaukee, WI
• Translate a napkin idea from Amazon founders into a Ruby autonomy-rich prototype
• Hunt down the latency spikes nobody at Amazon can explain

Skills

Ruby

Team collaboration

Mentoring teammates

Customer focus

Latency analysis

Tools

Jest

Job description

Energy Innovation Corp is seeking a Software Engineer in Milwaukee with a strong Ruby background to build resilient distributed systems and own the development of experiments. The role emphasizes test-first mindset, mentorship, and customer-focused collaboration across teams.

You will pair with engineers locally, analyze Jest metrics, and translate ideas into production-ready prototypes, driving latency improvements and system reliability in a hybrid work model.