Senior Blockchain Operations Engineer (Validator Ops)

Náplň práce, právomoci a zodpovednosti:

About the Role:

Run and evolve our institutional-grade validator & full-node fleet across leading PoS networks. Keep us slash-free, highly available, and upgrade-ready while onboarding new chains fast and safely.
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You will have the following responsibilities:

• Operate and optimize validators/full nodes for Ethereum (consensus+execution + MEV-Boost) and other PoS networks (e.g., Cosmos/Polkadot/Tezos/Cardano)
• Engineer secure topologies (sentries/guard nodes, peer management), tune performance (DB/cache/IO), and manage archival vs pruned nodes
• Lead chain upgrades/forks with rehearsed playbooks, staged rollouts and rollback paths
• Own keys & signing pipelines (HSM/KMS, Vault, Tezos signer) with no-double-sign guarantees and rigorous access controls
• Build observability (Prometheus/Grafana/Alertmanager, logs), define SLOs, participate in on-call, drive post-mortems
• Automate via Terraform/Ansible, GitOps/CI; maintain Proxmox, Kubernetes &/or bare metal depending on chain needs
• Create a reusable new-chain onboarding kit (requirements → architecture → IaC → monitoring → DR)
• Partner with Cybersecurity, Finance and Product on risk, cost and roadmap; represent us in client/ecosystem calls
  
  

This role includes participation in a rotating on-call schedule within the team, with each member responsible for one week of on-call duty at a time.

Zamestnanecké výhody, benefity:

• ​Exciting projects in the crypto space
• Friendly and supportive team culture that relies on positivity
• Flexible organization of your working hours
• Christmas bonus
• Company shares
• Home-office 
• Workation: Enjoy the flexibility of working across designated EU countries, with up to 10 days a year to combine work and travel
• Multisport card

Informácie o výberovom konaní:
Online Personal Interview
This call is about getting to know each other. We want to know more about your background, motivations and expectations and at the same time you can ask us your questions.

Technical Interview
In the technical interview, we have a few tasks for you to learn more about your skills. You will also have the opportunity to get to know the team and the workplace.

We will contact only candidates, who fit our needs. By sending your CV, you agree with processing of your personal data.

Požiadavky na zamestnanca:

What you bring along:

• ​8+ years in Linux SRE/infra; 3+ years running production validators/nodes for multiple PoS networks (incl. Ethereum post-merge)
• Proven in: client diversity and safe failover; fork/upgrade execution; MEV-Boost ops; Prometheus/Grafana; Terraform/Ansible; Bash + Go/Python
• Strong networking/storage fundamentals; disciplined change management; crisp incident handling and communications
• Nice to have: Cosmos/Tendermint + TMKMS/Horcrux; Polkadot; Tezos; Cardano; DVT (SSV/Obol) pilots; NixOS/immutable infra; eBPF; ISO 27001/SOC2 familiarity

How to apply:

Send a short note about your most challenging validator incident (what broke, how you fixed it, telemetry you added) plus links to any public tooling, dashboards, or post-mortems you can share.