Software Engineer · SecurityCurrently at Mercor

PranavAggarwal

I build systems that have to tell the difference between people and problems. Today that's fraud detection and identity infrastructure for a talent marketplace. Before that, payment rails moving a large share of India's UPI volume. In between, I compete in algorithms and maintain a privacy-first, on-device photo gallery.

Role: MTS, Security
Company: Mercor
Focus: Fraud · Identity
Based: India
Codeforces: Candidate Master

Selected work03

01 / 2025 —
Fraud engineering for a talent marketplace
Mercor · Security
Built the fraud and QA operations infrastructure for Mercor's matching system from zero — detection, review workflows, and identity verification woven into onboarding. Rebuilt resume parsing as OCR plus structured LLM extraction, and shipped an internal Slack bot so identity and QA checks stopped living in a spreadsheet.
~70%less fraud
0 → 1review platform
02 / 2025
Keeping UPI's backbone honest
PhonePe · Payments Core
Backend systems on rails carrying roughly 47% of India's UPI volume. Designed Connchecker, a proactive connectivity and anomaly detection service, from scratch — it brought outage detection down to under five minutes.
90K+txns / second
580ms → 3msconfig parse
03 / 2023 — 2025
Teaching machines to see, without the cloud
GSoC / AOSSIE · Pictopy
Founded Pictopy, a privacy-first photo gallery with fully on-device face and object detection. Mentored Google Summer of Code contributors on its architecture, CI, and ONNX Runtime inference stack across ten modules.
View repository →
90+contributors
100%on-device