Design and implement core blockchain node software in modern C++, including consensus, privacy-preserving cryptography, and high-performance P2P networking. Optimize transaction processing, enforce memory safety, maintain cross-platform CMake/Bazel builds, and conduct security-focused code reviews. Collaborate with cryptography researchers on zero-knowledge proofs, homomorphic encryption, MPC, and signature systems.
We are building the next generation of private, decentralized financial infrastructure. Our goal is to enable completely confidential transactions and smart contract interactions on a global scale. We are looking for a low-level systems expert who is passionate about cryptography, memory safety, and high-performance networking to join our core protocol team.
As a Senior C++ Developer, you will be responsible for architecting and implementing the core consensus and networking layers of our privacy-preserving blockchain. You will work closely with our cryptography researchers to translate complex zero-knowledge proof systems (zk-SNARKs/zk-STARKs) and ring signatures into production-grade C++ code. This is a high-impact role where performance and security are not just buzzwords, but the foundation of the product.
Key Responsibilities
- Core Protocol Development: Design, implement, and maintain the core blockchain node software in modern C++ (C++17/20).
- Privacy Integration: Implement and optimize cryptographic primitives, including Zero-Knowledge Proofs, Homomorphic Encryption, and Secure Multi-Party Computation (MPC).
- Performance Optimization: Profile and optimize code for high-throughput transaction processing and low-latency P2P networking (libp2p, custom protocols).
- Memory Safety: Ensure strict memory safety and security best practices to prevent side-channel attacks and memory leaks.
- Consensus Mechanisms: Contribute to the implementation of consensus algorithms (e.g., PoS, PoW variants) with a focus on finality and resistance to censorship.
- Cross-Platform Builds: Maintain build systems (CMake/Bazel) across Linux, macOS, and Windows environments.
- Code Review: Conduct rigorous peer reviews with a focus on security vulnerabilities and cryptographic correctness.
Required Skills & Qualifications
- Experience: 5+ years of professional C++ development experience (C++11/14/17 required; C++20 is a plus).
- Systems Knowledge: Deep understanding of computer systems, including memory management, concurrency, and lock-free data structures.
- Cryptography: Practical experience implementing cryptographic algorithms (Elliptic Curves, SHA-3, BLS signatures) or working with libraries like libsodium, OpenSSL, or Bitcoin Core’s secp256k1.
- Blockchain Fundamentals: Solid understanding of blockchain architecture (UTXO vs. Account models, Merkle Trees, P2P networking).
- Tooling: Proficiency with Git, CMake, and debugging tools (GDB, Valgrind).
- Security Mindset: Experience writing secure code and understanding common attack vectors in decentralized systems.
Nice-to-Have
- Experience with Rust (for interoperability or tooling).
- Familiarity with Zero-Knowledge frameworks (libsnark, bellman, arkworks).
- Experience with WASM (WebAssembly) for smart contract execution.
- Previous contributions to open-source privacy projects (Monero, Zcash, Tornado Cash, etc.).
- Understanding of libp2p or DevP2P protocols.
What We Offer
- Competitive Salary: Paid in fiat or crypto (your choice).
- Remote-First: Work from anywhere with flexible hours.
- Equity/Tokens: Generous token allocation for core contributors.
- Hardware Budget: Top-tier laptop and equipment of your choice.
- Conference Budget: Annual allowance for industry conferences (Devcon, Zcon, etc.).
- Impact: Work on technology that protects fundamental human rights to privacy.
How to Apply
Please submit your resume and a link to your GitHub or portfolio. If you have contributed to open-source privacy tech, please highlight those PRs.
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