Former <strong>OpenAI</strong> Engineer Reveals Inside Look at Company Work Experience

Three weeks ago, Calvin French-Owen - an engineer who contributed to OpenAI's most promising new product - left his position at the AI company. In a recent blog post, he shared insights from his one-year tenure that included grueling work sessions developing Codex, their coding assistant competing with tools like Cursor and Anthropic's Claude Code. French-Owen emphasized his departure wasn't due to "dramatic events" but a desire to return to entrepreneurship. As a co-founder of customer data startup Segment (acquired by Twilio for $3.2 billion in 2020), he brings significant experience to this decision.

While some observations about OpenAI's culture align with expectations, others challenge common misconceptions.

Exponential growth: The company expanded from 1,000 to 3,000 employees during his tenure.

This rapid expansion is justified by market demand - as the fastest-growing consumer product in history with 500 million active ChatGPT users, competitors are also accelerating quickly.

Operational challenges: "When scaling so rapidly, fundamental systems break down," French-Owen noted, citing communication protocols, reporting structures, product launches, and organizational frameworks.

The startup-like environment allows direct implementation of ideas without bureaucratic hurdles. However, this leads to duplicated efforts across teams - he observed multiple libraries for queue management and agent loops.

Engineering skill levels range from Google veterans handling billions of users to fresh PhD graduates. Combined with flexible Python development, this has created what he describes as a "backend monolith resembling a dumping ground."

Though systems frequently fail or experience performance issues, senior engineering managers actively address these problems.

Entrepreneurial ethos: OpenAI still maintains startup DNA, relying heavily on Slack for operations. This environment mirrors early Meta's fast-paced approach with many former Facebook employees present.

French-Owen's senior team - eight engineers, four researchers, and support staff - built and launched Codex in just seven weeks through intense work sessions.

The product's immediate success surprised even him: "I've never seen a product gain so much instant attention just by appearing in the sidebar - but that's the power of ChatGPT."

Security remains a critical focus, though French-Owen identifies the biggest misconception as insufficient attention to safety. While acknowledging external criticisms about theoretical risks, he explains internal priorities include mitigating practical threats like hate speech, political manipulation, bioweapon development, and self-harm scenarios.

OpenAI recognizes its transformative impact - with billions of users applying their large language models to medical advice and therapeutic contexts. Despite maintaining strict confidentiality protocols, the company actively monitors social platforms like X for emerging trends and potential responses.