Debug and extend a Python codebase by adding an async exponential retry mechanism with timeouts and backoff so failures are retried until success.

"I cold applied for Sierra's APX role, which is basically an early-career rotational role mixing PM, coding, and some customer-facing work. The process for me was a short recruiter chat, then a 1-hour live technical with one debugging problem and one Python traversal problem, and then an in-person onsite with a more product-heavy debugging round plus a product design round with the head of product. Overall it felt much more hands-on and practical than a normal LeetCode process, especially because so much of it centered on debugging and understanding an unfamiliar codebase quickly. The onsite also made it clear they want APX people to switch between engineering and product thinking, because even the debugging questions turned into customer impact questions. I finished the loop last Thursday and I’m still waiting to hear back."