sage2506
Senior Web3 Frontend Engineer
Senior Software Engineer with over 7 years of experience building scalable applications, currently specializing in the Web3 ecosystem. Proven expertise in architecting Next.js applications and Manifest V3 Chrome extensions for cryptocurrency wallets. Deeply experienced in integrating Solana Web3.js, Bitcoin Layer 2 (Spark SDK), and the Lightning Network into seamless, high-performance UIs. I actively leverage local AI LLMs (Qwen2.5/Ollama) to accelerate shipping velocity, generate tests, and audit code quality. Driven by outcomes and shipping fast in iterative, remote environments.
Experience: 8 years
Yearly salary: $60,000
Hourly rate: $25
Nationality: 🇲🇽 Mexico
Residency: 🇲🇽 Mexico
Experience
Senior Web3 Frontend Engineer
Sati DeFintech, Inc 2025 - 2026
Engineered a Bitcoin and Lightning wallet experience using Next.js 15, React 19, Zustand, and Sats Connect, enabling BTC deposits, withdrawals, and invoice generation. Architected Manifest V3 Chrome cryptocurrency wallet extensions (React/TypeScript) integrating Solana Web3.js and Spark SDK to enable SPL token transfers and QR payments across popup and background contexts. Designed a cross-context Web3 architecture utilizing iframe postMessage bridges and AES-encrypted wallet secrets for secure token swaps via Flashnet AMM. Implemented secure wallet-to-backend integration layers using nonce-based message signing and bearer-token authentication for reliable account ownership verification.
Senior Frontend Developer
Agricompra 2020 - 2026
Built and evolved a modular B2B marketplace platform, processing high-volume commercial flows, inventory management, and payment tracking. Designed a resilient REST-driven frontend architecture using TypeScript and RxJS, optimizing production delivery with AOT compilation and Brotli compression.
Main Developer
Coppel 2019 - 2020
Led the frontend migration of a critical regulatory reporting system from legacy Java to a modern React and Java Spring Boot architecture. Took full ownership of the frontend behavior, ensuring a smooth transition and improved user interface.
Software Developer (Mobile & Web)
Hunabsys 2017 - 2019
Built native Android features using Java, ensuring smooth mobile performance and hardware integration. Developed and supported multiple web applications across diverse stacks, including Ruby on Rails, .NET, and React
Skills
bitcoin
dapp
git
javascript
nextjs
node
postgres
react
react-native
ruby
solana
tailwind
typescript
web3
web3js
front-end
english
spanish