Senior Blockchain Engineer

8 hours ago

Lahore, Punjab, Pakistan beBeeBlockchain Full time
Full Stack Blockchain Developer

We are seeking a highly skilled Full Stack Blockchain Developer to join our team. The ideal candidate will have hands-on experience writing Solidity smart contracts for EVM-compatible chains and building blockchain clients or cryptographic libraries in Rust.

The successful candidate will be responsible for developing and maintaining our consensus client, enhancing and optimizing the Lighthouse Ethereum Client, and extending the wagyu-key-gen library for secure BLS key generation & threshold signatures.

  • Key Responsibilities:
  • Frontend Development: Build and optimize modern, responsive user interfaces using Next.js and Tailwind CSS.
  • Develop and maintain our consensus client (Rust) powering block proposal, attestations, and fork-choice logic.
  • Enhance and optimize the Lighthouse Ethereum Client, focusing on validator performance, sync mechanisms, and security improvements.
  • Extend the wagyu-key-gen library (Rust) for secure BLS key generation & threshold signatures.
  • Build & support the Staking-Deposit-CLI (Node.js/ethers.js) to batch ETH/ERC-20 deposits.
  • Audit and author Solidity contracts for token economics, governance modules, and bridge logic.
  • Collaborate on consensus upgrades, testnet launches, and mainnet hard forks.
  • Optimize P2P networking, slot-timing, and validator liveness under high throughput.
  • Write unit & integration tests and automate CI/CD pipelines for zero-downtime upgrades.
Required Skills & Experience

We are looking for candidates with:

  • 3+ years of experience writing Solidity smart contracts on Ethereum or EVM-compatible chains.
  • 2+ years of experience building blockchain clients or cryptographic libraries in Rust.
  • Deep understanding of PoS consensus protocols (Beacon chain, fork choice, attestations).
  • Experience working with the Lighthouse Ethereum Client, including optimization and validator management.
  • Strong proficiency in Node.js CLI tools using ethers.js, yargs, dotenv.
  • Solid grasp of BLS signature schemes, HD key derivation, and secure key management.
  • Linux server administration, Docker, and scripting for automated node provisioning.
  • Proven track record in open-source blockchain contributions or running validator nodes.
  • Strong testing discipline (unit tests, fuzzing, CI/CD with GitHub Actions, GitLab CI, etc.).

Nice to Have: Hands-on experience with cross-chain bridges or Layer-2 rollups, knowledge of libp2p, gRPC, or custom P2P protocols, prior work on staking-deposit contracts or validator dashboards, contributions to Ethereum Foundation, Polkadot, Cosmos, or similar ecosystems, performance tuning in Rust (async, Tokio, CPU profiling), Kubernetes or Terraform experience for large-scale validator clusters.

Who We're Looking For

We are looking for a proactive problem-solver passionate about decentralized systems, eager to improve Ethereum PoS infrastructure, and comfortable working with the Lighthouse Ethereum Client. You thrive in a fast-paced environment, take ownership of mission-critical components, and push blockchain technology forward.

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