Self-directed project
AI-Assisted Code Modernization with IBM
Junior Software Engineer · Software Engineering · August 2026
Based on a public IBM case study · not affiliated with IBM
Built a working modernization pass for a legacy fleet-maintenance service: fixed the wear calculation so nearly-worn cars are flagged, handled missing service readings safely, corrected the nightly report’s average and crash path, and found the hidden mileage-conversion bug in a helper module. Also added the missing regression test, preserved the original service rules, and produced a data-driven breakdown-risk analysis aligned with the provided fleet history.
Graded against
- Fix and extend the repo with the agent35%
- Diagnose the bug20%
- Direct and audit the AI agent25%
- Explain it like an engineer20%
Passed · pass mark 60/100
What stood out6
- Caught and fixed the quiet helper bug in fleet_utils.km_to_miles, which no test directly covered
- Preserved the service interval and warning threshold exactly as required while fixing the wear logic
- Added the missing report test for a car with no last-service reading and kept the report from crashing
- Wrote NOTES.md and exec_pitch in a way that clearly describes what the AI got wrong and how the work was checked
- Leakage-Free Bug Diagnosis
- Directed AI Code Review
The work I submitted20 tasks
12 tasks · 1.9k characters · 8 written answers · 70 words
- Division Predict70 characters
- Diagnose Line130 characters
- Diagnose Why91 characters
- Scope Prompt66 characters
- Audit Findings158 characters
- Audit Why154 characters
- Acceptance Checklist117 characters
- Bob Trial Click198 characters
- Template Repo Click82 characters
- Exec Pitch549 characters
- Bob Bonus209 characters
- Repo URL68 characters
- Division Predict1 word
- Diagnose Line10 words
- Diagnose Why15 words
- Scope Prompt1 word
- Audit Findings1 word
- Audit Why23 words
- Acceptance Checklist18 words
- Bob Trial Click1 word
Summarised on purpose — the submitted code and writing stay private so this page cannot be reused as an answer key. The full submission sits behind the verified certificate.