> Markdown version of [/jobs/ext/4087490-onsite-_c-developer_-o-fallon-mo](https://www.wearedevelopers.com/jobs/ext/4087490-onsite-_c-developer_-o-fallon-mo). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Onsite _C++ Developer_ O'Fallon, MO - **Company:** Themesoft Inc - **Location:** Fallon, MT, United States - **Experience:** Expert - **Salary:** $97,760.0 - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Unit Testing, C++ (Programming Language), Linux, Memory Management, Strategies of Testing, Google Test, Virtual Agents - **Published:** October 13, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=144f182e1b55acc5 ## About the Role 8+ Years if exp in C.C++ ,Linux ,google test ESSENTIAL_SKILLS C / C++, Linux, Google Test Work Authorization Applicants must be legally authorized to work in the United States. ## Description " Design, develop, and deploy AI-powered products, intelligent agents, and agentic workflows utilizing Large Language Models (LLMs), retrieval systems, orchestration frameworks, tool-calling patterns, and context-aware workflows. * Architect and implement advanced agentic systems incorporating planning, reasoning loops, memory management, grounding, evaluation frameworks, safety mechanisms, and human-in-the-loop controls. * Lead the transition of AI solutions from proof-of-concept to production by establishing best practices for reliability, observability, performance, security, governance, and cost optimization. * Develop scalable AI applications and developer productivity solutions using modern AI frameworks, SDKs, and orchestration platforms. Responsibilities * Partner with Product Management to elaborate features, stories, and test strategy for each initiative * Create technical design and assign work to developers * Develop complex stories in C and write unit tests in C++ (Google Test) * Be a human quality gate by leading code and design reviews * Collaborate with other Principals and Leads to define interfaces and interactions between systems * Advise on implementation strategy for successful deployment * Implement development process improvements and automation * Coach and develop junior employees * Deliver department and external presentations