Senior C Engineer Visual C Windows

Senior C Engineer (Visual C / Windows)

Location: Remote (LATAM South Africa or Philippines open to timezone overlap with clients core hours)
Compensation: Market-competitive; suggested ranges

• LATAM: $3500$6000/mo
• SA: $3000$5000/mo
• PH: $2500$4000/mo (USD). Final offer dependent on experience and on-call/shift requirements.

Industry: AdTech / SaaS / 24x7 Services
Schedule: Full-time Long-term May require on-call/shift overlap for 24x7 services

We are a global AdTech and SaaS solutions provider building and operating high-availability advertising and messaging platforms used by leading partners worldwide. Our systems power reliable ad-serving email and notification services that run 24x7 requiring a commitment to performance uptime and precision engineering. Were a distributed fast-moving team of specialists who thrive on solving complex problems at scale.

Were hiring a Senior C Engineer with deep experience in Visual C (MFC experience ideal) and Windows as the primary development platform. Youll focus on backend components (console apps DLLs service binaries) APIs (JSON/XML) SMTP/email subsystems and maintaining SaaS services with high uptime. This is a role for someone who can self-manage effectively while collaborating with global peers across time zones.

• Design build and maintain Windows-based backend components (console apps DLLs services) in C / Visual C.
  
• Troubleshoot and optimise existing C codebases for performance stability and memory usage.
  
• Implement and maintain APIs (JSON XML) used by internal and external services.
  
• Work with email/SMTP subsystems and related integrations (deliverability retry logic queuing).
  
• Develop maintain and debug multi-threaded low-latency server-side components.
  
• Write and maintain unit/integration tests; contribute to CI/CD for Windows builds.
  
• Participate in on-call rotations and incident response for 24x7 SaaS services.
  
• Collaborate with cross-functional teams (DevOps QA Product) in a distributed environment.
  
• Document architecture design decisions and troubleshooting guides.
  

• 710 years professional experience in C development with strong Visual C on Windows.
  
• Solid experience building backend components: console apps DLLs Windows services. Front-end Win32 UI is OK but not required; MFC experience is a plus.
  
• Strong understanding of Windows internals threading memory management and debugging tools (WinDbg Visual Studio debugger etc.).
  
• Experience with APIs (JSON XML) and integrating with web services.
  
• Familiarity with email/SMTP systems and patterns for email delivery and retry.
  
• Some SQL experience (MySQL preferred; MS SQL skills transferable).
  
• Fluent English (written & spoken) for cross-region collaboration.
  
• Experience working with SaaS 24x7 services and participating in on-call rotations.
  
• Self-starter able to work independently and in a global team.
  

Preferred

• Previous experience building or maintaining high-availability AdTech or messaging systems.
  
• Experience with CI/CD and automated Windows build/release pipelines.
  
• Familiarity with containerisation on Windows or hybrid container strategies.
  
• Knowledge of networking / sockets / TLS for secure service integrations.
  

What We Offer

• Remote-first role with flexible hours (expect overlap with client core hours).
  
• Competitive compensation (see ranges above) performance bonuses and on-call premiums.
  
• Opportunity to work on high-impact globally used AdTech systems with a small skilled engineering team.
  
• Professional development budget and access to technical conferences/training

Required Experience:

Senior IC