Senior Software Engineer – C/C++

LaunchCode; St. Louis (MO); On-site; USD 120,000 - 180,000; Full time

Job summary

LaunchCode in St. Louis, Missouri is seeking a Senior Software Engineer with strong C/C++ experience to join a team building and enhancing high-performance software.

This role focuses on performance, reliability, and precision, delivering mission-critical applications while collaborating with experienced engineers in an Agile environment that values quality, automation, and continuous improvement. You will design, test, and optimize complex systems, contribute to test frameworks with Google

Qualifications

• Bachelor's degree in computer science, Software Engineering, Information Technology, Mathematics, or related field, or equivalent practical experience.
• Strong C/C++ development experience and ability to produce high-performance software.
• Java experience is a plus.
• Experience building, testing, debugging, and maintaining complex software.
• Familiarity with testing methodologies (unit, integration, system, functional) and test plans.
• Experience with Google Test for unit testing.
• Proficiency with Git and scripting (Shell).
• Knowledge of CI/CD and Agile development.
• Solid fundamentals in algorithms, data structures, operating systems, networking, and distributed systems.

Responsibilities

• Design, develop, enhance, and maintain high-performance C/C++ applications.
• Build reliable software for systems with demanding performance and availability requirements.
• Develop unit tests using Google Test and contribute to automated testing frameworks.
• Translate technical requirements and design specifications into test plans and implementation strategies.
• Perform functional, integration, system, and user acceptance testing to ensure software quality.
• Analyze logs, traces, and system behavior to identify issues and validate application performance.
• Troubleshoot complex defects, investigate root causes, and implement lasting solutions.
• Support production readiness, incident resolution, and ongoing system reliability.
• Identify opportunities to improve performance, test automation, and engineering efficiency.
• Participate in code reviews, technical design discussions, sprint planning, and other Agile activities.
• Collaborate with engineers, architects, product owners, and cross-functional partners.
• Create technical documentation and share knowledge to help strengthen the engineering team.

Skills

C/C++ development

Java experience

Testing

Git

Shell scripting

CI/CD

Agile

Distributed systems

Education

Bachelor's degree in CS/Software Engineering/IT/Mathematics or related field

Tools

Google Test

Job description

Important: Must be authorized to work in the United States without sponsorship now or in the future. Our client has specific work authorization requirements and is unable to provide current or future visa sponsorship.

Employment Type: Contract-to-hire, with an initial contract period of 6-12 months. Conversion to permanent employment is possible but not guaranteed.

We're looking for a talented Senior Software Engineer with strong C/C++ experience to join a team building and enhancing high-performance software.

This is an opportunity to work on systems where performance, reliability, and precision matter every day. You'll help develop and improve mission-critical applications, solve challenging technical problems, and collaborate with experienced engineers in an Agile environment that values quality, automation, and continuous improvement.

If you enjoy digging into complex systems, writing efficient code, and seeing the real-world impact of your work, this could be an exciting next step.

What You'll Do

• Design, develop, enhance, and maintain high-performance applications using C/C++.
• Build reliable, scalable software for systems with demanding performance and availability requirements.
• Develop unit tests using Google Test and contribute to automated testing frameworks.
• Translate technical requirements and design specifications into test plans and implementation strategies.
• Perform functional, integration, system, and user acceptance testing to ensure software quality.
• Analyze logs, traces, and system behavior to identify issues and validate application performance.
• Troubleshoot complex defects, investigate root causes, and implement lasting solutions.
• Support production readiness, incident resolution, and ongoing system reliability.
• Identify opportunities to improve performance, test automation, and engineering efficiency.
• Participate in code reviews, technical design discussions, sprint planning, and other Agile activities.
• Collaborate with engineers, architects, product owners, and cross-functional partners.
• Create technical documentation and share knowledge to help strengthen the engineering team.

What We're Looking For

• Strong professional experience developing software with C/C++; Java experience is a plus.
• Experience building, testing, debugging, and maintaining complex software applications.
• Understanding of software testing methodologies, including unit, integration, system, and functional testing.
• Experience creating test plans and strategies based on technical requirements.
• Familiarity with test automation, defect tracking, and test coverage analysis.
• Experience with Shell scripting or similar scripting languages.
• Proficiency with Git or other source control tools.
• Solid fundamentals in algorithms, data structures, operating systems, networking, and distributed systems.
• Experience working with performance-sensitive, highly available applications.
• Familiarity with Agile development, CI/CD, and modern software delivery practices.
• Strong analytical, debugging, and problem-solving skills.
• Ability to communicate effectively, work independently, and collaborate with a technical team.

Education: Bachelor's degree in computer science, Software Engineering, Information Technology, Mathematics, or a related field, or equivalent practical experience.

If you're a hands-on C/C++ engineer who enjoys solving challenging problems and building reliable software at scale, we'd love to hear from you.