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As a Senior Engineer on the PoS Engineering team at Polygon Labs, you’ll focus on strengthening the peer-to-peer networking capabilities across all three of our core clients—Bor, Erigon, and Heimdall. This role is ideal for someone passionate about distributed systems and low-level networking, who wants to solve complex stability and connectivity challenges at scale. Working closely with a high-caliber team of engineers across time zones, you will play a key role in ensuring the network reliability and performance of the Polygon PoS chain. You’ll take ownership of diagnosing and resolving hard-to-find issues in our peer-to-peer layer and will help us evolve our network topology to meet the next phase of growth.
Job Responsibility:
Design, implement, and optimize peer-to-peer networking components in the Bor, Erigon, and Heimdall clients
Analyze and improve network stability by identifying peering bottlenecks, protocol edge cases, or propagation inefficiencies
Investigate incidents and contribute to root cause analysis (RCA) efforts related to network partitions, peer discovery failures, or gossip performance issues
Collaborate closely with internal protocol and infra teams to align client behavior with network goals
Contribute to client documentation and architecture discussions around networking layers and system resilience
Stay up to date with trends and developments in distributed systems and peer-to-peer infrastructure
Requirements:
5+ years of experience in systems or infrastructure engineering, ideally working on distributed systems or blockchain clients
Deep expertise in Go (Golang), with strong knowledge of networking libraries, protocols (TCP/UDP), and debugging tools
Demonstrated ability to solve complex problems in live production systems with a proactive, ownership-first mindset
Experience working on peer-to-peer networking protocols or low-level infrastructure systems
Comfortable working in a remote, asynchronous environment across time zones (EMEA, East Coast US, or South America preferred)
Nice to have:
Prior experience working on blockchain or decentralized network infrastructure
Familiarity with the Ethereum ecosystem and Polygon PoS architecture
Exposure to multiple client implementations and consensus protocols
Strong written communication skills, especially around documenting technical findings or incident reviews
What we offer:
Remote first global workforce
Industry leading Medical, Dental and Vision health insurance
Company matching 401k with 3% match
$1,500 Home Office Set Up Allowance (life-time max)
$75 Monthly internet or phone reimbursement
Flexible Time Off
Company issued laptop
Egg freezing, mental health, and employee wellness benefits