Rafael Costa
Edge AI Engineer · Quantization, TensorRT, field deployment
Quantized a vision model from 240MB to 11MB with <1% accuracy loss. Deployed to 3,000+ edge devices with OTA model updates.
Artifact Gallery
Threshold tuning for vision-based quality control station.
Aug 20, 2026Structured annotation workflow for high-quality dataset capture.
Jul 17, 2026ML-based anomaly score visualization cutting false positives by 40%.
Jun 14, 2026Calibration schedule and drift-correction workflow for fleet sensors.
May 11, 2026Process Trace Summary
- Repository initializedJul 6
Created project scaffold with README and license.
- First commit pushedJul 8
Initial proof-of-concept with placeholder data.
- Evaluation harness addedAug 10
Wired up 50-question regression suite with LLM-as-judge.
- Peer review feedbackAug 12
Two reviewers flagged edge cases in retrieval fallback path.
- Iteration — fallback hardenedSep 14
Added retry + validation; eval score improved 12 points.
- Final submissionSep 16
Artifact submitted for oral defense scheduling.
Oral Defense Transcripts
Recorded Q&A from each verified oral defense session. Expand a session to read the transcript.
Walk us through the architecture of your artifact. Why did you choose this approach?
I chose a plan-and-execute topology because the task required multi-step retrieval with reflection. The plan node decomposes the query, sub-agents retrieve and draft in parallel, and a reflection node scores and routes for a second pass when below threshold.
What evaluation did you run, and what were the headline numbers?
I ran a 50-query regression suite scored by LLM-as-judge calibrated against a human panel (0.86 agreement). Baseline scored 71%; the reflection pass lifted it to 88% with a 14% latency cost, which stayed within budget.
Describe a failure mode you found and how you mitigated it.
Retrieval fallback returned stale context on schema changes. I added a freshness check + retry with a smaller context window, which reduced stale-grounded answers from 9% to under 2%.