Lead Smart Contract Engineer - Solana

Siza- Buso Consulting
New York, NY

As the first Lead Smart Contract Engineer, you'll architect, implement, and own the lifecycle of the Solana programs that power next-generation on-chain products. You'll partner closely with the CTO and mentor junior developers while driving both greenfield protocol launches and iterative upgrades of production programs.

Responsibilities

  • Design & architect Solana programs and their on-chain account structures from ideation to mainnet.
  • Implement & test high-performance programs in Rust using the Anchor framework.
  • Own deployments across Solana clusters (mainnet-beta, devnet, testnet) and manage the program lifecycle.
  • Maintain & upgrade existing programs: oversee Solana's native upgradeability, manage Program Derived Addresses (PDAs), and ensure stable account data layouts across versions.
  • Harden security: write comprehensive unit and integration tests, run static analyzers, coordinate external audits, and remediate findings.
  • Collaborate daily with frontend and product to ship end-to-end DeFi features on Solana.
  • Mentor & lead: set best practices for junior Rust/Anchor engineers and help shape our on-chain architecture roadmap.

Requirements

  • 5+ years of experience as a software engineer, with 2+ years of hands-on experience architecting and deploying Solana programs in Rust.
  • Successfully launched Solana protocols through to mainnet-beta and ensured the underlying programs have passed third-party audits.
  • Deep knowledge of the Solana Program Model, the Sealevel runtime, Program Derived Addresses (PDAs), account validation, and common Solana-specific attack vectors (e.g., account confusion, missing ownership checks, type cosplay).
  • Proficiency with the Anchor framework, solana-cli, and @solana/web3.js.
  • Comfortable with Solana's Cross-Program Invocation (CPI) model and familiar with cross-chain communication protocols like Wormhole.
  • Strong testing cultureunit, integration, and fuzz tests baked into CI pipelines.
  • Excellent written & verbal communication; you're able to write concise technical specifications and audit reports.
  • Ability to thrive in a high-ownership, fast-moving startup environment and set technical direction.
Posted 2026-02-10

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