Blockchain Node Operator & Site Reliability Engineer
Blocksize provides institutional-grade infrastructure for the decentralized finance (DeFi) ecosystem. Their offerings include real-time crypto data feeds, non-custodial staking services, and reliable validator node operations. The company emphasizes security and compliance, operating under German legal frameworks to serve financial institutions and decentralized applications.
About Blocksize
Blocksize is a German-incorporated company that provides DeFi infrastructure solutions to safeguard the shift of the financial services industry into decentralized finance. Their services include node operations, non-custodial delegated staking, and providing real-time, multi-source, validated, and curated crypto price data feeds developed for decentralized oracle networks and financial institutions. They build compliant infrastructure for decentralized applications and financial institutions, focusing on reliability with geo-redundant systems and 24/7 monitoring. They support various protocols like Solana, Polygon, Pyth, Supra, and Redstone.
Skills
About the Role
You will be responsible for maintaining full nodes for various blockchains, finding efficient ways to deploy and manage them. You'll dive deep into blockchain-specific monitoring, helping the team cut down on noise by fine-tuning alerts. You'll troubleshoot production issues to address technical commitments and boost sustainability, and pair with other engineers to deploy new services, increase developer velocity, and eliminate pain points.
Requirements
- 5+ years of relevant professional experience in operations and infrastructure
- Strong expertise with Linux command line, shell scripting (especially Bash), and automation of operational workflows
- Solid background in IT security and operational security (OpSec)
- Deep experience with monitoring, log analysis, and alerting tools
- Experience with scripting and configuration management
- Practical knowledge of Terraform, Ansible, Helm Charts, Gitlab (CI/CD optional), and scripting languages such as Python
- Proficiency in infrastructure automation, containerization, bare-metal server management, and cloud computing (with a strong focus on GCP)
- Proficiency in blockchain technologies including Chainlink and/or Pyth, Ethereum, Solana, Avalanche, Lido, SupraOracles
- Experience leveraging AI-driven automation, including agents and the Model Context Protocol (MCP)
- Experience running blockchain full nodes preferred
- Setup and management of Kubernetes clusters preferred
- Know-how in exporting metrics via Prometheus and building Grafana dashboards preferred
- Excellent experience with GCP, AWS, or Microsoft Azure
- Experience in the financial services and/or capital market domain preferred
- Very good English skills
- Ideally located in Central Europe (CET timezone) or within ±2 hours
Responsibilities
- Maintain full nodes for various blockchains and find ways to deploy and manage them more efficiently
- Fine-tune alerts and reduce monitoring noise
- Troubleshoot production issues to address technical commitments and boost sustainability
- Pair with other engineers to troubleshoot and deploy new services
- Increase developer velocity and eliminate pain points
Benefits
- Work up to 100% remotely or enjoy the office in Frankfurt's financial district
- Temporary work from abroad, allowing you to work up to 6 months a year from anywhere in the world
- Continuous and qualitatively unique further training is supported
- Excellent infrastructure and benefits (Apple equipment, gym classes, etc.)
- Employee Stock Ownership program