CTO Co-Founder – Blockchain Lending Platform | BlockGi

Blockgi; Madrid; A distancia; EUR 125.000 - 150.000; A tiempo parcial

Descripción de la vacante

A peer-to-peer lending platform is seeking a technical co-founder (CTO) to lead the technology roadmap and grow with the team from day one. The ideal candidate has deep blockchain experience, strong knowledge of Bitcoin and Ethereum, and a willingness to shape the tech, product, and culture at the company. This remote-first role offers a unique opportunity to influence the startup's direction in the crypto lending space.

Formación

• Deep blockchain experience required.
• Comfortable with multisig and self-custody.
• Experience with designing secure, trust-minimized protocols.

Responsabilidades

• Own and architect the entire tech stack.
• Design and implement smart contracts.
• Develop key systems for margin call logic and KYC/API integrations.
• Collaborate with founders on product and roadmap.

Conocimientos

Bitcoin and Ethereum knowledge

Smart contract development

Experience with DeFi and crypto lending protocols

Entrepreneurial mindset

Descripción del empleo

Location: Remote | HQ: Madrid
Commitment: Part-time to Full-time | Equity
Industry: Crypto / DeFi / Lending
Stage: Pre-Seed | MVP in development

About BlockGi

BlockGi is a peer-to-peer lending platform where users can get instant loans in stablecoins backed by Bitcoin collateral. We’re building a fully transparent, self-custodial infrastructure that combines the security of BTC with the liquidity of USDT/USDC. Smart contracts, automated risk monitoring, and user-friendly interfaces are at the heart of our vision.

We’re looking for a technical co-founder (CTO) with deep blockchain experience to lead the tech roadmap, build the MVP, and grow with us from day one.

What You’ll Do

• Own and architect the entire tech stack (initially Web3 + backend).
• Design and implement smart contracts for Bitcoin-collateralized loans (BTC native or via wrapped solutions).
• Develop key systems: collateral management, margin call logic, stablecoin disbursement, KYC/API integrations.
• Make strategic choices on L1s/L2s and custody solutions.
• Lead or manage future hires (devs, auditors, etc.).
• Collaborate directly with the founders on product, compliance, and roadmap.
• Build something ambitious that you’ll be proud of.

You Are

• A builder with strong knowledge of Bitcoin, Ethereum, and smart contract development (Solidity, Rust, or Script-based alternatives).
• Comfortable with multisig, self-custody, and designing secure, trust-minimized protocols.
• Experienced with DeFi and crypto lending protocols (e.g. Aave, Sovryn, Tropykus, Debifi, etc.).
• Entrepreneurial mindset, ready to join as co-founder, not just employee.

Bonus if you have experience with: Chainlink oracle.

Why Join Now

• You’ll be a co-founder and shape the tech, product, and culture from day one.
• We believe in granular, ethical finance: empowering users, not exploiting them.

Remote-first, asynchronous team with real skin in the game.