Eduardo Damasceno Guedes

OneDocs — identity verification, liveness and anti-fraud platform, in production for two enterprise clients including SPTrans, São Paulo's public transport authority. Sole front-end engineer on the product team (2 back-end engineers, a tech lead and a PO).

• Built and maintained six applications: five chained, customer-facing capture SPAs (session entry with desktop-to-mobile QR handoff, liveness, document capture) plus an internal operations dashboard for manual review. The liveness app alone handled 800,000+ capture sessions in production between April and August 2026 — ~200,000 per month, predominantly mobile, with an average completion time of 1.5 minutes.
• Implemented liveness detection with MediaPipe FaceLandmarker (468 landmarks, on-device WASM inference): four-step facial challenge, auto-capture driven by stability detection, framing hysteresis and in-frame validation. Migration from the previous library improved eyeglasses support and reduced bundle size.
• Built the client-side anti-fraud metadata layer — device fingerprinting, geolocation, and IP detection with a three-provider fallback chain — and integrated Scanbot SDK for document capture with MRZ and QR reading.
• Built the operations dashboard used by human reviewers (React 19, Redux Toolkit with RTK Query, JWT auth): real-time review queue, risk analysis, and side-by-side comparison of selfies and document images, on a component library documented in Storybook.
• Led the CI/CD migration from AWS CodePipeline to GitHub Actions with OIDC federation, eliminating static deploy credentials and applying least-privilege IAM policies per project and environment. Designed the staging environment end to end — S3 Website hosting and a shared multi-origin CloudFront distribution routing several applications by cache behaviour. Deploys in ~2–3 minutes.
• Found and remediated exposed credentials embedded at build time and in versioned documentation — then built a pre-commit hook that blocks commits containing tokens, private keys or account identifiers, turning a one-off fix into ongoing prevention.
• Owned test infrastructure: migrated the test runner from Jest to Vitest, configured React Testing Library with jsdom, and added unit tests for priority modules.

• Proposed and led the migration from WordPress to Next.js (SSR) with Tailwind, Strapi and PostgreSQL in Docker on a VPS, improving load speed, SEO and hosting cost.
• Owned deployment, backups, environment monitoring, on-page SEO and analytics.

• Built high-traffic applications used by millions of users across ~15 Latin American countries, with Next.js, TypeScript, Node.js, REST APIs, Ruby on Rails, Docker, Semaphore CI and AWS.
• Contributed to the new client space application, delivering a completely new experience to the customer base.
• Worked in Agile/SCRUM teams, collaborating through rigorous pull requests and code review.

Front-end and full-stack roles at ACE Startups, Equitem Multiplo, A2ad, Rio Surf N Stay, Universidade de São Paulo, Agência DPI, DENDRIX, Humortadela and WebSoluções.

• Created and ran the company's sales channel from scratch, using AI to produce professional marketing assets at a scale a solo operator could not otherwise reach.
• Built the end-to-end AI content and listing pipeline in Python — product mockup through Google Gemini image generation to published marketplace listings — matured over a year from fully manual execution. Cut content production from 22 to 1.5 minutes per item (93% reduction).
• Integrated the Mercado Livre API over OAuth (listings, variation groups, listing tiers, bulk updates) and built sponsored-ads management with budget and ROAS strategy.

• Built the company website and led wholesale production, delivering 2,000+ units monthly to 10+ B2B partners. Ran the business full-time between Smart Fit and SurfSup.
• Built and runs the business's financial system in production (Laravel 13, PostgreSQL, Docker on a VPS): OAuth 2.0 integration with the Bling ERP, idempotent background sync, and automated monthly P&L computed from product recipes, fixed costs and pricing parameters.