Senior Software Engineer – Go / C

Staffingine LLC is excited to announce an excellent Contract opportunity with one of our top clients!

Position: Senior Software Engineer – Go / C

Location: St. Louis, MO (Local Candidates Preferred)

Interview Mode: Final Round – Onsite

Experience: 8+ Years

Job Summary

• We are seeking a highly skilled Senior Software Engineer – Network Services / Proxy Development with 8+ years of experience in systems software development, Go or C programming, Linux systems programming, and network engineering.
• The ideal candidate must have strong hands-on programming experience in Go (Golang) or C, along with expertise in TCP/IP, socket programming, concurrency, and developing high-performance network services.
• The primary responsibility is to take ownership of an existing Go-based proof of concept and evolve it into secure, scalable, reliable, and production-ready proxy software.
• Important: This is a hands-on Systems Software Development role, not a general Backend Development, DevOps, or Linux Administration position.

Core responsibilities

• Review and rapidly understand an existing proxy codebase.
• Develop traffic-management, failover, connection-draining, recovery, telemetry, and operational-control capabilities.
• Build reliable software for persistent TCP connections and stateful traffic movement.
• Resolve defects and improve performance, resiliency, security, and maintainability.
• Build APIs and integration points for automation and operational tooling.
• Own unit, component, and integration testing as part of development.
• Participate in code reviews, SDLC integration, vulnerability remediation, performance certification, and production support.
• Use AI-assisted development tools responsibly to improve engineering productivity and quality.

Required skills

• Strong hands-on development experience in Go or C is mandatory. Candidates without demonstrated Go or C programming experience should not be submitted.
• Linux systems programming, socket programming, concurrency, multithreading, and network services.
• TCP/IP and distributed-systems fundamentals.
• High-performance, highly available, long-running services.
• Automated testing, debugging, profiling, secure coding, and CI/CD practices.

Preferred experience

• Proxy, load-balancing, service-mesh, network-appliance, or traffic-management products.
• Linux kernel networking and eBPF.
• Experience moving a proof of concept through enterprise SDLC and production readiness.