Blockchain Node Operator & Site Reliability Engineer Web3

Blocksize; Frankfurt; Remote; EUR 110,000 - 150,000; Full time

Benefits offered by this job

Remote work eligibility

Office in Frankfurt (optional)

Flexible training & growth

Job summary

Blocksize is seeking a Senior Infrastructure/Operations engineer to maintain full blockchain nodes and optimize deployment across multiple networks. You will fine-tune monitoring systems to reduce noise and ensure reliable, scalable operations.

You will troubleshoot production issues, collaborate with engineers to deploy new services, and help boost developer velocity while strengthening security and governance across our infrastructure.

Qualifications

• 5+ years of operations and infrastructure experience.
• Strong Linux and Bash scripting skills.
• Solid IT security and OpSec basics.
• Deep experience with monitoring, logs, and alerting.
• Scripting and automation to optimize workflows.
• Experience with Terraform, Ansible, Helm, and Python.
• Proficiency in infrastructure automation, containers, bare-metal, and cloud (GCP).
• Blockchain tech familiarity including Chainlink/Pyth, Ethereum, Solana, etc.
• Experience applying AI-driven automation and MCP.

Responsibilities

• Maintain full nodes for multiple blockchains and optimize deployment and management.
• Fine-tune blockchain monitoring to reduce noise and improve alerts.
• Troubleshoot production issues; collaborate with engineers to deploy services and increase developer velocity.

Skills

Linux

Bash

Automation

IT security

Monitoring

Scripting

Terraform

Ansible

Helm

Gitlab CI/CD

Python

GCP

Cloud computing

Blockchain

Kubernetes

Prometheus

Grafana

English

Tools

Docker

CI/CD tools

Job description

• You will be responsible for maintaining full nodes for various blockchains and finding ways to deploy and manage them more efficiently.
• You understand blockchain-specific monitoring in great depth and you will be helping the team cut down on noise by fine-tuning alerts.
• You will troubleshoot production issues to address technical commitments and boost sustainability, as well as pair with other engineers to troubleshoot, deploy new services, and figure out how to increase developer velocity and eliminate pain points.

Your mission

• You will be responsible for maintaining full nodes for various blockchains and finding ways to deploy and manage them more efficiently.
• You understand blockchain-specific monitoring in great depth and you will be helping the team cut down on noise by fine-tuning alerts.
• You will troubleshoot production issues to address technical commitments and boost sustainability, as well as pair with other engineers to troubleshoot, deploy new services, and figure out how to increase developer velocity and eliminate pain points.

Your profile

• Senior-level expertise with 5+ years of relevant professional experience in operations and infrastructure - but still hands-on and close to the systems.
• Strong expertise with Linux command line, shell scripting (especially Bash), and automation of operational workflows.
• Solid background in IT security and operational security (OpSec); you understand secure infrastructure design and safe key/credential handling.
• Deep experience with monitoring, log analysis, and alerting tools; you know how to reduce noise and design meaningful dashboards.
• Experience with scripting and configuration management; you write scripts to automate routine tasks and optimize workflows.
• Practical knowledge in some of the following technologies: 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 and applications, including: Chainlink and/or Pyth, Ethereum, Solana, Avalanche, Lido, SupraOracles.
• Experience actively leveraging AI-driven automation, including agents and the Model Context Protocol (MCP) to reduce manual operational overhead and extend system capabilities.

Preferred Knowledge

• Experience running blockchain full nodes gives you a considerable advantage; excitement for blockchain, Web 3.0, and decentralized finance.
• Setup and management of Kubernetes clusters and comfort in deploying new services on them.
• Know-how in exporting metrics via Prometheus and building Grafana dashboards.
• Strong desire to grow and challenge yourself.
• Excellent experience with GCP (preferred), AWS, or Microsoft Azure.
• Agility, self-organization, and openness to learning.
• Experience in the financial services and/or capital market domain.
• Result orientation, conceptual and analytical thinking.
• Collaborative by nature; willing to give and receive feedback.
• You enjoy your work, and that shows in your results.
• Very good English skills.
• Ideally located in Central Europe (CET timezone) or within ±2 hours.

Why us?

• Become part of a young and agile team. Grow with Blocksize!
• 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 for you.
• Excellent infrastructure and benefits (Apple equipment, gym classes, etc.).
• Employee Stock Ownership program.

About Us

Blocksize is a Germany-based DeFi infrastructure provider trusted by financial institutions. Since 2018, we've been strengthening DeFi at every layer - operating our own validators, delivering best-in-class crypto data, and enabling anyone to participate in network security through delegated staking.