Engineering Lead - Crypto and DeFi

Join Kast as an Engineering Lead to drive DeFi product development, leading architecture and development for asset management and lending products.

KAST is redefining what it means to bank with stablecoins - think Revolut, rebuilt from scratch on Web3.

Backed by top-tier VCs, we've grown from 0 to 1 million users in under a year.

We're building the next-gen global bank based entirely on stablecoins.

Design is at the heart of everything we do - it's how we simplify the complex, make money feel easy, and turn crypto skeptics into brand ambassadors.

## What you'll do

• •Own the DeFi architecture across backend services, blockchain integrations, and supporting systems.
• •Build and integrate DeFi products including lending, borrowing, yield, and liquidity strategies.
• •Design secure blockchain interactions, including wallet infrastructure, signing flows, and custody integrations.
• •Develop backend systems for transaction management, protocol integrations, and onchain/offchain coordination.
• •Lead engineering execution — define architecture, review code, and ensure systems remain reliable, scalable, and secure.
• •Hire and mentor engineers as the team grows, establishing strong technical standards.
• •Collaborate closely with product and design to deliver high-quality user-facing financial products.

• •8+ years of software engineering experience, with experience leading technical projects or teams.
• •Strong backend engineering experience in one or more of the following: Go, Python, or Node.js.
• •Experience building production systems that integrate with blockchain networks.
• •Familiarity with Solana and/or EVM-compatible chains.
• •Strong understanding of DeFi systems, including lending/borrowing protocols, swaps, liquidity aggregation, and yield strategies.
• •Knowledge of DeFi risk mechanics such as collateral management, liquidations, staking, and yield generation.
• •Experience designing APIs, distributed services, and database-backed systems.
• •Experience building or operating cloud-based systems (AWS or similar).
• •Strong communication skills and ability to drive engineering execution in a fast-moving environment.