Iván Mañús Murcia

Building web3 without the UX tax. Privacy by default, custody by design.

Spain · Remote

about

Engineer who thinks in products, not just systems. Security and privacy by default — I question what's worth building before I build it to last.

Full-stack since 2018, web3 since 2020 — both still active, both load-bearing. I keep up with new tech the way other people keep up with the news.

For 3+ years at Bit2Me I led Commerce — the product that let Spanish merchants accept crypto for goods and services, auto-swapped to fiat. As part of the Core team I also drove DevRel, integrating Bit2Me's API into banks and exchanges — €1M+/mo in institutional flow.

Co-author of EIP-5216. Co-founder of EscuelaCryptoES, the Spanish-speaking EVM community. On LinkedIn (2,000+ followers) I share a critical, engineer's-eye read on ecosystem news.

What I build for: DeFi, privacy and security shipped with the UX they deserve — for institutions and individuals alike. Low-level under the hood, seamless on top. I build AI tooling for others; I use it as accelerant, not crutch, for myself.

experience

Commerce Principal Engineer · DevRel @ Bit2Me

Nov 2023 – Jan 2026

Remote

  • Led Bit2Me Commerce as Principal Engineer — the product that let Spanish merchants accept crypto for goods and services, auto-swapped to fiat. Suite's first product to accept Lightning Network payments.
  • Core team member; drove DevRel integrating Bit2Me's API into banks and exchanges — 10+ institutional integrations processing €1M+/mo.

Software Support Engineer, Commerce @ Bit2Me

Nov 2022 – Nov 2023

Remote

  • Onboarded 300+ merchants to crypto payments via Bit2Me Commerce — €300k+ in first-year volume.
  • Bridged product, support, and engineering: scoped requirements, built integration tooling, shipped fixes.

Independent — self-directed

Aug 2020 – Nov 2022

Spain

  • Finished BSc in IT Engineering at Universidad de Alicante.
  • Self-taught Solidity and the EVM stack.
  • Built and shipped DeFi and NFT projects on EVM, hands-on across the full stack.

Full-stack Developer @ Corporation For Imaging Diagnosis And Treatment

Jul 2018 – Aug 2020

Spain

  • Built client-facing web software in PHP, JavaScript/jQuery, and MySQL — owned the full analysis → design → deploy cycle.
  • Managed hosting, migrations, and on-site / remote client support; mentored teammates.

building (side-projects)

EscuelaCryptoES

co-founder · community

Spanish-speaking EVM community I co-built — onboarding developers from outside crypto into smart-contract development, testing, security review, and AI / crypto debates.

Bauta & R1DO Tools

privacy suite

Private stealth payments on EVM (ERC-5564 / EIP-6538), RAILGUN private transfers over Waku, and passkey-based privacy management. Self-custodial end to end.

The Great

co-founder · protocol · DeFi

DeFi intelligence platform connecting real-time on-chain data with professional risk criteria.

Also exploring: NeuralBridge (AI ops) · Kuhana (social finance) · DeDelivery (logistics protocol).

education

stack

Smart contracts
Solidity · Hardhat · OpenZeppelin · EVM gas & storage optimization · ERC-20 / 721 / 1155
Privacy & crypto
Applied cryptography · stealth addresses (ERC-5564 / EIP-6538) · RAILGUN shielded ops · passkeys (WebAuthn) · Safe{Core} SDK · ERC-4337 account abstraction
Payments rails
Bitcoin · DeFi flow · standard EVM money flow · institutional web2 APIs · crypto-to-fiat · auto-swaps · cross-chain ops
Backend
TypeScript · Node.js · Python
Frontend
Next.js · Vite · React
Infra
IPFS · Waku