Senior Software Engineer – C++ (Engineering Applications)

Location:
St. Louis, MO (Hybrid-Remote)

Employment Type:
Full-time

Eligibility:
U.S. Citizen or Green Card Holder

Role Overview

We are looking for a
senior, hands-on C++ engineer
to join a small development team working on advanced engineering software. This position is best suited for someone who prefers
deep technical work over people management
, enjoys improving complex systems incrementally, and values close collaboration with a small group of experienced engineers.

This is not a managerial role. There are no direct reports and no expectation to transition into management. Success in this role comes from
technical judgment, reliability, and collaboration
, not from owning roadmaps or driving process.

Over time, this engineer will become a
trusted technical counterpart
to our senior developer—helping distribute technical load, providing thoughtful second opinions, and strengthening the long-term sustainability of the codebase.

What You Will Work On

• Maintaining, debugging, and enhancing a large, long-lived C++ codebase
• Improving performance, robustness, and test coverage in existing systems
• Implementing new features that integrate cleanly with established architecture
• Writing and maintaining automated unit and regression tests
• Investigating and resolving test failures and production issues
• Participating in code reviews and technical discussions with a small, distributed team

Most work involves
understanding existing code deeply
, not rewriting it.

Required Experience

- Strong proficiency in
C++
- Solid grasp of memory management, STL, and language features
- Comfort navigating and modifying large, complex legacy codebases
- Experience debugging production software and diagnosing non-trivial defects
- Ability to work effectively in a
small, hybrid-remote team
- Willingness to collaborate through code reviews and shared ownership
- U.S. citizenship or permanent residency

Strongly Preferred

• Windows development experience
• Visual Studio proficiency
• Experience with Azure DevOps or similar tooling
• Experience writing automated tests and debugging test failures

Helpful (But Not Required)

• C# / .NET
• VB / VBA
• FORTRAN
• QA or testing background
• CAD or 3D graphics software experience
• Parasolid, HOOPS Visualize, MeshSim
• GUI development
• C++ MFC and/or C# WPF

What We Value

- Engineers who prefer
depth over breadth
- Thoughtful, respectful communication—especially in technical disagreement
- Comfort working alongside teammates with different strengths and communication styles
- Pride in making existing systems better, safer, and easier to maintain

Learn more about ESRD, Inc. at www.esrd.com