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# Senior Protocol Engineer

- **Company:** Farrell Distributing Corporation
- **Location:** United States (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Code Review, Software Debugging, Software Design Documents, DevOps, Distributed Systems, JSON, Open Source Technology, Blockchain, Prometheus, Software Engineering, Rollup, System Availability, Grafana, Ethereum, Solidity, Bitcoin, Docker
- **Published:** November 13, 2026
- **Apply:** https://arc.dev/remote-jobs/j/redirect/pyvseus5di

## About the Role

* 5+ years of professional software engineering, with at least 2 years in blockchain core or protocol development (node clients, consensus, etc.).
 * Solid production experience in mainstream languages (for example Go, Rust or Java).
 * Deep knowledge of blockchain internals and the EVM: consensus, P2P networking, state and storage, transaction lifecycle, JSON-RPC, etc.
 * Experience working effectively in large codebases you did not write.
 * AI-assisted development is a core part of your work, while owning what you deliver.
 * Autonomy and ownership: you help define the work, not only execute assigned tasks.
 * Good English, spoken and written, since the team is international and remote.

Nice to have

 * Professional experience with Go and/or Rust.
 * Hands-on experience with Ethereum Layer 2 rollups (optimistic or ZK).
 * Understanding of rollup design: sequencing, data availability, derivation, finality, etc.
 * Contributions to open source blockchain clients or rollup stacks.
 * Experience with fault proof systems or validity proofs.
 * Knowledge of Bitcoin and EVM compatible chains.
 * Experience with Docker, cloud providers, Prometheus and Grafana.
 * Able to read and review Solidity (bridge and system contracts).

## Description

We are looking for a Senior Protocol Engineer to join our Rollup team. This is a hands-on, full-time engineering role focused on building and scaling our Bitcoin-secured Layer 2 rollup on Rootstock. This is a protocol role: you'll work directly on the chain on topics such as sequencing, block derivation, consensus and finality, bridge and proof system. You will join a small team of senior engineers with high ownership. You will design, build, test and operate core components, and you will take part in the technical decisions of the project., * Design, build and maintain core protocol components: execution and consensus clients, sequencer, block derivation and batch submission to the parent chain.

 * Work on the bridge and the proof system: deposits, withdrawals, cross-layer messages and state validation.
 * Maintain a large open source codebase: learn how its parts work together, make changes that are safe for a live network, and keep the code easy to evolve.
 * Review code, write design docs and RFCs, and take part in architecture decisions.
 * Test and debug a distributed system: unit to adversarial tests, local devnets, reorgs, node desync and performance problems.
 * Deliver and operate releases on public chains: upgrades, hard forks, monitoring and incidents, etc.
 * Collaborate with Product, DevOps and Security to plan and ship each release.