Principal Software Engineer: Swift, .NET, Cloud, Mentorship

Energy Plus LLC; Rock Hill (SC); On-site; USD 146,000 - 203,000; Full time

Benefits offered by this job

Growth plan

Mentor program

Benefits for life beyond Rock Hill

Job summary

Energy Plus LLC is hiring a Principal Software Engineer in Rock Hill, SC. You will own critical Swift components, write .NET Core integration tests, and aggressively trim cloud costs while handling complex MySQL billing edge cases.

You’ll mentor other principal hires, respond to production incidents, and reverse-engineer undocumented Swift formats to improve reliability. Strong collaboration and written communication are essential, with experience in GitHub Actions a must.

Qualifications

• Strong written communication and collaboration.
• Ability to mentor and share credit responsibly.
• Experience with GitHub Actions in production environments.
• Proven Swift results or projects, ideally in Rock Hill, SC.
• Curiosity to read docs before asking questions.

Responsibilities

• Mentor newer principal hires on wiring Swift together.
• Write the .NET Core integration tests that catch regressions.
• Trim cloud bill by right-sizing Networking infrastructure in Rock Hill, SC.
• Own edge cases in MySQL billing nobody else wants to touch.
• Investigate, diagnose, and fix bugs reported by users and monitoring tools.
• Troubleshoot and resolve production incidents across GitHub Actions-based applications.
• Reverse-engineer the Swift format Energy Plus LLC inherited and never documented.

Skills

Swift

.NET Core

GitHub Actions

Mentoring

Debugging

MySQL

Production incidents

Tools

MySQL

Job description

Energy Plus LLC is hiring a Principal Software Engineer in Rock Hill, SC. You will own critical Swift components, write .NET Core integration tests, and aggressively trim cloud costs while handling complex MySQL billing edge cases.

You’ll mentor other principal hires, respond to production incidents, and reverse-engineer undocumented Swift formats to improve reliability. Strong collaboration and written communication are essential, with experience in GitHub Actions a must.