Protocol Engineer - Platform

Who We Are: Galaxy Digital Inc. (Nasdaq: GLXY) is a global leader in digital assets and data center infrastructure, growing the economy that runs on code. Galaxy delivers the onchain infrastructure that connects institutions to digital assets, including trading, advisory, asset management, staking, self-custody, and tokenization. Galaxy also develops and operates data center infrastructure to power AI and HPC workloads. Anchored by its Helios campus in Texas, Galaxy is building a multi-gigawatt pipeline of more than 5.7 GW of potential capacity, positioning it among the largest and fastest-growing data center developers in North America. The Company is headquartered in New York City, with offices across North America, Europe, the Middle East, and Asia. Additional information about Galaxy's businesses and products is available on www.galaxy.com . What We Value: We are a diverse team of free thinkers, and fast movers united to help investors and creators energize the global economy. We are looking for individuals who thrive in a culture of builders and overachievers and embrace high performance, transparent feedback, and a mission-first approach. Our culture shapes our way of working and gets us where we want to be. Seek Excellence. Be Selective To Be Effective. Be Highly Aligned, Loosely Coupled. Disagree Transparently. Encourage Independent Decision-Making. Build Dream Teams. Who You Are: As a Senior Platform Engineer, you'll own the infrastructure that runs institutional-grade blockchain operations — with particular depth in Ethereum validator infrastructure, consensus and execution client operations, and the platform layer that makes all of it reliable, observable, and scalable. This isn't a role where blockchain is adjacent to the real work. Validator clusters,client diversity, MEV infrastructure, slashing protection, and the operationalcomplexity of running Ethereum at institutional scale are core to what you'll buildand maintain. That sits alongside the broader platform stack: Kubernetes (EKS,GitOps with FluxCD), AWS, Kafka, secrets and key management (KMS/HSM,MPC), Postgres, and the observability layer. You'll also work closely with clients —understanding their systems, translating requirements into platform capabilities,and collaborating on integrations. What You’ll Do: Own and operate Ethereum validator infrastructure at scale — consensus clients (Lighthouse, Prysm, Teku, Nimbus), execution clients (Geth,Nethermind, Besu, Reth), and the tooling that keeps them healthy, diverse, and performant. Build and maintain the platform layer underneath validator operations: cluster lifecycle management, client upgrades, peer connectivity, fork tracking, and the observability stack that surfaces what matters. Manage slashing protection, key management, and signer infrastructure (Web3Signer, distributed validators, HSM/MPC-backed signing) at the level of rigor institutional staking demands. Harden shared platform infrastructure: EKS environments, GitOps pipelines,secrets management, networking, CI/CD, and the data plane. Partner closely with clients on integration work across staking, tokenization, DeFi, and validator engagements. Translate their constraints into platform requirements and ship the code that closes the gap. Generalize patterns from client work into reusable platform capabilities — so the next engagement doesn't start from zero. Operate production systems where the failure mode is institutional money and reputation. On-call, incident response, post mortems. Contribute to architecture decisions across modules — staking, MPC quorum coordination, policy engine, vaults. What We’re Looking For: Substantial experience building and operating distributed systems in production, ideally where reliability and security are first-class concerns. Deep comfort with the modern infrastructure stack: Kubernetes, AWS (or equivalent), infrastructure-as-code, GitOps, observability tooling, CI/CD. Strong software engineering fundamentals…