We Built an Open-Source Coding Exam Platform...

Every year, our team visits engineering colleges across India to hire freshers. The first round is always an online coding test — 300+ students, one shot at finding the ones who can actually think. We tried Coderbyte. Fifty concurrent user limit. So we'd split students into batches, stagger timings, juggle schedules between college coordinators and our engineers. We tried HackerRank's community edition. Different tool, different headache. Every vendor had a ceiling — concurrency limits, inflexib