Agustin Gelos

Fullstack engineer with 5+ years shipping production SaaS from scratch for US startups (Boston & San Francisco), fully remote. I own the whole stack: React/NestJS apps on serverless AWS (Lambda, CDK, SQS, EventBridge) handling thousands of daily transactions. Some results I'm proud of: a serverless migration that cut infra costs ~40%, a 50,000-record data engine that became a company's core competitive moat, and an E2E suite taken from 15% to 55% coverage. I've delivered voice AI for legal firms, HR assessment platforms, and business intelligence tools, all multi-tenant. I do my best work on hard problems with real deadlines.