Blockchain Developer (DeFi and Cryptography)

About the role

This position focuses on developing secure, high-performance decentralized finance (DeFi) protocols. The work involves designing and implementing robust smart contracts for core DeFi primitives like automated market makers, lending pools, and cross-chain bridges. A key aspect is applying advanced cryptographic principles to ensure data integrity and user privacy within these systems.

The role requires bridging complex financial logic with low-level blockchain implementation, ensuring systems are mathematically sound and resilient. This includes designing scalable back-end architectures that integrate with Ethereum, Layer 2 solutions, or Rust-based chains. The developer will also research and implement cutting-edge DeFi mechanisms such as flash loans, yield farming, and algorithmic stablecoin logic.

Success in this role means delivering production-grade decentralized applications with a strong emphasis on security and reliability. This involves conducting rigorous unit testing, integration testing, and formal verification to prevent vulnerabilities. The developer will also collaborate with front-end engineers and UI/UX designers to create seamless decentralized user experiences.

The annual salary for this position ranges from $110,000 to $140,000.

Skills that matter here

• Solidity: This language is used for designing and implementing robust smart contracts for DeFi primitives.
• Rust: This language is essential for developing on Rust-based chains and for tooling and testing.
• JavaScript: This skill is used for tooling and testing, complementing the core blockchain development.
• TypeScript: This skill is used for tooling and testing, complementing the core blockchain development.
• Python: This skill is used for tooling and testing, complementing the core blockchain development.

Who this role suits

• You have a proven track record of delivering production-grade decentralized applications.
• You possess a deep understanding of blockchain internals, including consensus mechanisms and gas optimization.
• You are an expert in testing, simulating, and debugging complex distributed environments.
• You have comprehensive experience with various DeFi mechanisms and complex tokenomics.

From the employer

• Smart Contract Engineering: Design and implement robust smart contracts for DeFi primitives such as automated market makers (AMMs), lending pools, and cross-chain bridges.
• Protocol Security: Apply advanced cryptographic principles (e.g., digital signatures, hashing, zero-knowledge proofs) to ensure data integrity and user privacy.
• System Architecture: Design scalable back-end architectures that interface seamlessly with Ethereum, Layer 2 solutions, or Rust-based chains.
• DeFi Innovation: Research and implement cutting-edge DeFi mechanisms including flash loans, yield farming strategies, and algorithmic stablecoin logic.
• Audit & Quality Assurance: Conduct rigorous unit testing, integration testing, and formal verification to eliminate vulnerabilities before deployment.
• Collaboration: Work closely with front-end engineers to integrate Web3 providers and with UI/UX designers to create seamless decentralized experiences.

• Blockchain Developer with DeFi and Cryptography experience: Proven track record of shipping production-grade decentralized applications.
• Multilingual Programming: Professional proficiency in Solidity and Rust, complemented by strong JavaScript/TypeScript or Python for tooling and testing.
• Core Architecture: Deep understanding of blockchain internals, including consensus mechanisms (PoS, PoW), state machines, and gas optimization techniques.
• DeFi Domain Expertise: Comprehensive experience with DEXs, liquidity provisioning, staking, derivatives, payments, lending, and complex tokenomics/token systems.
• Cryptography Fundamentals: Solid grasp of symmetric/asymmetric encryption, elliptic curve cryptography (ECC), and secure key management.
• Debugging & Testing: Expert ability to test, simulate, and fix complex bugs in distributed environments using frameworks like Hardhat, Foundry, or Anchor.