Divyang Chauhan

Pramana: Multi-agent smart-contract vulnerability scanner & evaluation harness

• Designed provider-neutral three agent system with context isolation and tool usage that produces executable PoC
• Built an eval harness covering 14 labeled vulnerabilities in 11 classes with patched negative control, with baselines and cost/latency tracking. Benchmarked the agents; best runs found 13/14 vulnerabilities with 0 false positive

DiffVouch: AI code-review agent skill & CLI

• Built a portable AI code-review Agent Skill and CLI that analyzes Git changes, produces actionable findings and weighted ratings, and can publish GitHub PR reviews

Kleros, Remote

• Led splitting of monolithic NestJS backend into horizontally scalable API and single instance automation services: established the monorepo and migrated 57K+ production events across databases with ~1 minute of downtime
• Built Atlas’s NestJS backend from scratch, designing runtime-configurable event ingestion across 3 production EVM chains, using Node.js EventEmitter for asynchronous downstream processing by 23+ consumers
• Caught an unbounded RPC hot-path dependency during code review and rebuilt the path around synchronized database reads, removing the DoS risk before production
• Automated dispute progression and juror staking across networks; used transaction simulation and batched calls to improve execution reliability and reduce cost by ~22%

NST Cyber, Remote

• Led a cross-functional team of 9 building Assure v2, a multi-tenant vulnerability-triage and threat-surface management platform sold directly to multinational banks and white-labeled by cybersecurity resellers
• Built an AI-assisted APT attribution workflow using the OpenAI API to map threat-surface to threat actors
• Replatformed Assure from OutSystems, eliminating ~$200K/year in platform costs while enabling 3-level tenancy, data isolation modes, and white-labeling; authored ~70% of the backend and shipped in six months
• Architected Assure v2’s authorization model using CASL.js: 5-role hierarchical RBAC plus ABAC (Attribute-Based Access Control), tenant isolation, and per-user project access
• Wrote Terraform for Assure v2's core AWS infrastructure, reducing deployment time from ~2 hours to 10–15 minutes; introduced Cypress E2E tests, reducing full regression from hours to under 30 minutes

• Delivered Assure v1 concept to production in 3 months, authoring 80% of codebase and onboarding first 5 enterprise clients; rapid adoption exceeded platform limits, driving decision to rebuild on scalable architecture
• Developed Tigress's Django REST Framework backend from scratch; designed a MySQL schema supporting 10M+ records and created a serializer abstraction that reduced new endpoint development time by 60%
• Eliminated distributed-task bottleneck in Tigress's scanning engine by architecting cross-instance Celery dispatch, reducing scan time by 75% and scaling the platform from 10 to 100 daily scans without infrastructure changes