Senior Software Engineer from São Jose dos Pinhais, Brazil
I'm Carlos, a Senior Backend Engineer with 10+ years of experience building scalable systems in Python, AWS, PostgreSQL, and distributed architectures across fintechs, marketplaces, and enterprise...
I'm Carlos, a Senior Backend Engineer with 10+ years of experience building scalable systems in Python, AWS, PostgreSQL, and distributed architectures across fintechs, marketplaces, and enterprise platforms.
I'll be upfront: I don't have professional blockchain experience yet. What I do have is genuine, hands-on engagement with the space through personal projects. My most active build is a DeFi arbitrage bot on Arbitrum that uses Bellman-Ford pathfinding to identify profitable cycles across DEXs and executes them atomically via flash loans. I'm currently refining the smart contract architecture (operator/owner role separation) and validating strategies through mainnet fork simulation before deploying real capital.
Beyond that project, I've spent years learning graph algorithms, MEV, on-chain data patterns, and DeFi protocol mechanics — so I come in with real context, not surface-level curiosity.
What I can help with:
- Backend systems interacting with on-chain data (indexers, monitors, alerting, dashboards)
- Trading bot and arbitrage architecture (Python, event-driven design, testing frameworks)
- Data pipelines and analytics for DeFi protocols
- General senior backend engineering for crypto-adjacent products
I bring the same production-grade mindset to crypto work that I bring to fintech settlements — clean architecture, testing, observability, secure integration patterns, and honest scoping. If your project needs solid backend craftsmanship with someone who genuinely gets the space, let's talk.