Emmanuel Agüero Rojas
Backend & Full-Stack Software Engineer · Blockchain / Web3
Available for full-time
- ~$95M/mo
- application volume gated
- 70% ↓
- onboarding drop-off
- 3+ yrs
- production fintech / Web3
I own a Snap Finance onboarding backend gating ~$95M/month in application volume — from design through on-call. On the side, I've co-founded and shipped two products, Cavos and Framezz, which keep my Web3 and end-to-end delivery sharp. Looking for a full-time backend or full-stack role.
Alajuela, Costa Rica · GMT-6 · Remote-eligible
// about
Backend and full-stack engineer with 3+ years shipping production systems in fintech and Web3. I own a Snap Finance onboarding backend gating ~$95M/month in application volume, and I've co-founded two companies on the side: Cavos (embedded-wallet infrastructure for Starknet) and Framezz (selfie-search photo platform for event photography). Comfortable owning a service from design through on-call — and equally comfortable pitching investors.
// github
@EmmanuelAR · 630 contributions469 commits · 147 PRs
// ventures
Cavos
flagshipInvisible wallets for crypto apps. Users onboard into self-custodial smart accounts with just a Google or Apple login — no seed phrase, no browser extension. Under the hood it's account abstraction: the social login provisions and controls an on-chain smart account, so wallet UX disappears for the end user. Live on Ethereum mainnet and Starknet, including the production integration with Jokers of Neon.
Next.js · React · Solidity · Cairo
cavos.xyz
Studio Framezz
Selfie-search photo platform for endurance races and marathons, with IVA-compliant e-invoicing for Costa Rica. An AWS pipeline (S3 storage + image processing) indexes and serves 40K+ photos across 12+ live events — search your face, get your race photos in seconds.
Next.js · TypeScript · AWS S3
studioframezz.com/en// experience
Community Ambassador — Cursor Community
- Drive adoption of AI-native software development across the developer ecosystem by growing the Cursor community and building connections across startups, universities, and tech organizations.
- Help developers apply AI tools to real-world workflows by leading educational initiatives, organizing workshops and hackathons, and growing strategic partnerships and technical content.
Software Development Engineer II — Snap Finance
- Own the onboarding backend that gates new-user revenue — ~$95M/month in application volume — across design, delivery, and on-call incident response for production traffic.
- Cut onboarding drop-off by 70% by diagnosing recurring failures to root cause and shipping targeted backend fixes.
- Build and maintain microservices in Java, Spring Boot, and Node.js on AWS, deployed via CI/CD under Agile sprints.
- Promoted Intern → SDE I → SDE II in two years by owning projects end-to-end.
Co-Founder / Software Engineer — Cavos
- Co-founded Cavos, embedded-wallet infrastructure for Starknet apps — onboard users into self-custodial smart accounts with a Google or Apple login, no seed phrase.
- Architected and shipped the full stack (Next.js, React, Solidity, Cairo) live on Ethereum mainnet and Starknet, including the production integration with Jokers of Neon.
- Raised $25K pre-seed and represented Cavos at Devcon Cannes 2025 and Devconnect Argentina 2025.
Co-Founder / Software Engineer — Studio Framezz
- Co-founded Framezz, a selfie-search photo platform for event photography with IVA-compliant invoicing for Costa Rica — ~$2K in revenue within the first two months in production.
- Built the platform end-to-end with Next.js and TypeScript on an AWS S3 storage and delivery pipeline that indexes and serves 40K+ photos across 12+ live races (~3K per event).
- Live at Ironman 70.3 CapCana (Dominican Republic), Disney Princess Half Marathon (Orlando), BMW Lindora Run, and Clásica Palmarín MTB; on-site technical lead.
// skills
// education
Blockchain, Solidity y Gobernanza con Optimism
Universidad CENFOTEC
B.Eng., Systems Engineering
Universidad Nacional, Costa Rica
// certifications
Scrum Fundamentals Certified (SFC)
SCRUMstudy
See more certifications (3) →
Introduction to Data Science
Cisco
Python Essentials 1
Cisco
Postman Student Expert
Canvas Credentials (Badgr)
// let's talk
I'm actively looking for a full-time backend or full-stack role (remote-friendly, GMT-6). If your team is hiring, grab 15 minutes below or send my CV — I'll get back to you fast.