Smart Contract Engineer (Web3)

TL;DR

Smart Contract Engineer (Solidity/Web3): Designing and auditing smart contracts for on-chain collateral markets with an accent on performance, security, and DeFi primitives. Focus on building vaults, lending mechanics, and architecting greenfield financial products on the hirify.global stack.

Location: Remote (UK, Canada, France, Hong Kong, Italy, Portugal, Serbia, Switzerland, USA)

Company

hirify.global is the infrastructure beneath collateral markets, enabling new categories of neofinance applications like credit, insurance, and RWA liquidity.

What you will do

• Design, optimize, and audit Solidity smart contracts focusing on performance, clarity, and security.
• Build DeFi primitives from scratch, including vaults, lending mechanics, and staking components.
• Develop adapters, connectors, and plugins for the Liquid Lane product.
• Architect and build greenfield financial products and new modules from the ground up.
• Conduct security audits and harden contracts against common attack vectors.
• Leverage AI to build internal tooling, indexers, and simple frontends to deliver end-to-end features.

Requirements

• Expertise in Solidity and deep knowledge of EVM internals (execution flow, memory/storage, gas mechanics).
• Strong grasp of DeFi protocols and primitives (lending protocols, DEXes, stablecoins).
• Strong security mindset with experience in contract optimization and the audit process.
• Ability to work across the stack as a fullstack developer when the task requires it.
• Solid computer science fundamentals, including algorithms and low-level code execution reasoning.

Nice to have

• Deep specialist knowledge in a specific protocol domain.
• Experience in compiler development.
• Proficiency in Rust, Go, C/C++, Python, or JavaScript/TypeScript.
• Exposure to Yul, Vyper, or Huff.

Culture & Benefits

• Work in a tight-knit team of experienced builders from high-growth startups and leading financial institutions.
• Ownership-driven environment with a high bar for craft and early-stage urgency.
• High level of trust and support for taking initiative.
• Backed by top-tier investors including Paradigm, Pantera, and Coinbase Ventures.