Blockchain Engineer — DevOps & Infrastructure

As a Blockchain Engineer focused on DevOps and Infrastructure at Alastria, you operate and evolve the Hyperledger Besu node infrastructure that powers ISBE, Spain's blockchain services infrastructure. You join a small, agile core team within an ecosystem of over 500 organizations, working directly on regulated European use cases: qualified evidence registration, traceability, digital identity, trust registries, and tokenization.

What you'll do

• Operate and evolve the Hyperledger Besu node infrastructure that sustains the network: deployment, monitoring, upgrades, and scaling.
• Contribute to and execute the decentralized network architecture: node topology, consensus policies (IBFT 2.0 and QBFT), network permission management, and onboarding of new nodes operated by third parties.
• Build and maintain CI/CD pipelines for automated deployment of nodes, smart contracts, and services.
• Maintain and expand the observability strategy: logging, metrics, alerts, and dashboards for a distributed multi-operator network.
• Participate in interoperability work with other European networks: EBSI nodes, national networks from other countries, and public networks.
• Respond to network incidents, including on-call rotations and escalation procedures.
• Contribute to technical operations documentation so network partners can operate their own nodes independently.

What you bring

• 2-4 years of DevOps or SRE experience, with at least one year working on blockchain infrastructure or distributed systems.
• Hands-on experience with Hyperledger Besu: node deployment, configuration, and troubleshooting. Experience with other Ethereum clients (Geth, Nethermind) also applies.
• Proficiency with containers and orchestration: Docker and Kubernetes.
• Experience with Infrastructure as Code (Terraform, Ansible, or similar) and CI/CD pipelines (GitHub Actions, GitLab CI, Jenkins).
• Knowledge of networking and security in P2P networks: peer management, discovery, firewalls, and TLS between nodes.
• Experience with monitoring and observability tools: Prometheus, Grafana, ELK, or similar.
• Good level of spoken and written English.

Nice to have

• Experience operating multi-operator permissioned networks, coordinating external operators rather than just managing your own nodes.
• Knowledge of BFT consensus mechanisms (IBFT 2.0, QBFT).
• Experience with European or sovereign cloud providers, where digital sovereignty matters.
• Experience with digital identity protocols at the infrastructure level: DID methods or trust registries.
• Strong scripting skills in Bash and Python for operations automation.

What we offer

• Work on production infrastructure serving real institutional customers, not pilots.
• Engineer-level position with growth potential toward Architect as your scope evolves.
• An environment where all opinions are welcome to improve processes daily.
• Services supporting a healthy work environment: one-on-one meetings, anonymous satisfaction surveys, and simple vacation planning and time off.
• Work from anywhere, though you will travel occasionally for in-person meetings and team events.
• Internal training sessions.
• Real impact: you contribute to building critical infrastructure for the European digital economy.
• European context: direct collaboration with partners and networks across other countries.

About Alastria Blockchain Ecosystem

ISBE is Spain's blockchain services infrastructure, promoted by the Community of Madrid and operated by Alastria. It serves over 500 organizations and is designed for regulated European use cases including qualified evidence registration, traceability, digital identity, trust registries, and tokenization.