Production-shaped debugging practice
Get better at debugging with production-shaped practice built from real codebases, real incident patterns, and safely packaged open-source bugs. Every public challenge is free to practice. No trivia. No blank-slate algorithm puzzles.
138 playable labs · 509 technical guides · no local setup
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What Buglyst measures
Strong engineers do more than land on a passing patch. They reproduce the failure, separate signal from noise, trace the root cause, change the smallest surface, and prove the result.
Read the debugging playbooksWhy Buglyst
Cloned repositories from production failures. Fix race conditions, memory leaks, and logic errors in complex codebases — not isolated functions.
Your fix isn't checked against just the known failing test. Our hidden CI suite ensures you haven't introduced regressions elsewhere.
Follow specialised curriculums. From "Frontend Rendering Bottlenecks" to "Distributed Systems Deadlocks."
Last attempt
Stop solving toy puzzles. Buglyst labs are mirrored from real OSS repositories with real failure modes, real dependencies, and real evidence.
No local setup. Open a workspace, reproduce the failure, change the smallest correct surface, and prove it with the same checks a reviewer would run.
Harsh S.
Engaged 10 times
Every lab opens with the same evidence on-call engineers use: failing assertion, stack trace, recent commit, and the changed-file list as a suspect map.
An accepted patch becomes a verifiable report — root-cause analysis, test strategy, and patch quality — not just a green checkmark.
Practice backend, API, CI, configuration, and production-style failure modes that hiring teams actually screen for.
Acme is hiring for a backend debugging role — they want evidence, not algorithm drills.
For engineering teams
Evaluate root-cause analysis, test strategy, patch quality, and verification discipline inside a realistic debugging task. Request pilot access. We’ll provision the workspace, help choose the screen, and activate candidate access only after scope and payment are confirmed.
Demo evidence note: isolated the boundary condition before editing; verified visible and hidden checks. Not a real candidate record.
Clear pricing
Every public challenge stays open. Pro adds developer evidence and career tools; Hiring is a separate product for teams.
Developer
₹0All public practiceStart freeHiring
Starter · ₹4,999 once5 candidate starts · request a pilotRequest a pilot