Emmanuel Agüero Rojas
Software Engineer — Backend & Full-Stack · Blockchain / Web3
Backend and full-stack engineer with 3+ years shipping production systems in fintech and Web3.
Alajuela, Costa Rica · GMT-6 · Remote-eligible
// about
I own mission-critical onboarding infrastructure at Snap Finance and co-founded two companies: Cavos (embedded-wallet infrastructure for Starknet) and Framezz (selfie-search photo platform for event photography). I'm comfortable owning a service from design through on-call — and equally comfortable pitching investors.
// github
@EmmanuelAR · 448 contributions// ventures
// experience
Software Development Engineer II — Snap Finance
Jan 2023 – Present · Alajuela, CR- Own the end-to-end user onboarding backend that gates new-user revenue — design, delivery, and on-call incident response for production traffic.
- Diagnosed recurring onboarding failures to root cause and shipped targeted backend fixes that measurably improved completion reliability.
- 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
Apr 2025 – Present · Remote- 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
May 2025 – Present · Remote- Co-founded Framezz, a selfie-search photo platform for event photography (endurance races, marathons) with IVA-compliant invoicing for Costa Rica.
- Built the platform end-to-end with Next.js and TypeScript, backed by AWS (S3-driven storage and delivery) that indexes and serves photos from live events.
- Live at Ironman 70.3 CapCana, Disney Princess Half Marathon (Orlando), BMW Lindora Run, and Clásica Palmarín MTB; technical lead.
// skills
JavaTypeScriptJavaScriptPythonC++SQLCairoSoliditySpring BootNode.jsNext.jsReactPostgreSQLREST APIsAWSAzureSupabaseMongoDBGitCI/CDStarknetEthereum