SamuelBarbosa
Software Developer
Blockchain · Smart Contracts · Web3
Medellín, Colombia|Open to Remote
About
I'm a senior software engineer and tech lead, builder at heart. I ship secure wallets, DeFi protocols, and mobile apps with Rust, TypeScript, Kotlin, and Dart.
I have led teams and co-founded products, delivering on-chain components across Cosmos/CosmWasm and EVM, plus user-friendly apps in production. Born in Rio de Janeiro and coding since 2005, I care about speed, safety, and real users.
Highlights
- 01Building blockchain infrastructure since 2018
- 02Co-founded multiple successful startups
- 03Led teams delivering production-grade DeFi protocols
- 04Expertise in CosmWasm, EVM, and cross-chain solutions
Coding Since
2005
Experience
Smart Contract Developer
Mantra Chain
- Developing smart contracts for the MultiVM Mantra RWA ecosystem
- Focusing on real-world asset tokenization and cross-chain interoperability
Web3 Freelance Developer
Various Clients
- Yieldi Labs: React.js development for a Liquidity Manager app for THORChain
- FortyTwo: React.js development for a DeFi tool with multichain swaps, Liquid Staking and Lending
- ElDorado: Vue3.js development for a Multichain swap interface (Thorchain, Maya, Chainflip)
Chief Technology Officer
Loop Fans
- Led Web3 integration for real-world use cases with NFTs
- Built SuperFans Communities, Ticketing, and Rewards systems
Co-Founder & CTO
Local Money
- Developed decentralized p2p fiat-crypto marketplace using CosmWasm smart contracts
- Built frontend with Vue3.js and microservices architecture with Rust & MySQL
Android Developer
Dash Core Group
- Developed official Android wallet for Dash cryptocurrency
- Implemented direct connection to decentralized network with P2P peer discovery and SPV validation
Android Developer
Globant
- Developed Disney Cruise Navigator and My Disney Experience apps
- Built features for vacation planning, payments, and activity booking
Chief Technology Officer
InOut Delivery
- Led team of 4 developers for white-label delivery app platform
Co-Founder & CTO
EasyDeliver
- Built full-stack courier platform with Node.JS and Android
- Developed mobile/web solution connecting customers to nearby couriers
Earlier career includes roles at Concrete Solutions, ResolveAi Taxi, and more — 15+ years of building software.
Skills
Blockchain & Web3
Languages
Frontend
Backend
Mobile
Infrastructure
Databases
Match the pairs to discover my skills
Projects
Local Money
Decentralized peer-to-peer fiat-crypto marketplace built on Cosmos/CosmWasm. Enables trustless trading between fiat currencies and cryptocurrencies with smart contract escrow.
Yieldi Labs Liquidity Manager
Liquidity management application for THORChain ecosystem. Provides users with tools to manage liquidity positions and optimize yields across DeFi protocols.
Dash Android Wallet
Official Android wallet for Dash cryptocurrency with direct P2P network connection, SPV validation, and secure transaction handling.
ElDorado Multichain Swap
Cross-chain swap interface connecting to THORChain, Maya Protocol, and Chainflip. Enables seamless asset swaps across multiple blockchain networks.
Get in Touch
I'm currently open to new opportunities. Whether you have a project in mind, want to discuss blockchain development, or just want to say hi — let's connect.
Medellín, Colombia
Open to Remote