First of all, congrats on getting interview call. This itself is a difficult scrutiny before actual interview. For the Certik Blockchain Infrastructure Engineer interview, I would suggest you to focus on these key areas:
Node Operations: Certik may test your ability to monitor and optimize nodes for their security-focused infrastructure. So practice setting up and managing full, validator, and archive nodes. Understand syncing methods (full, fast, or light) and troubleshoot issues like stale blocks or syncing failures.
Consensus Mechanisms: Review PoW, PoS, and Certik’s proprietary mechanisms. Be ready to discuss their impact on node performance and how to handle forks or failed consensus in a security-oriented environment.
Cloud Deployment: Deploy blockchain nodes on AWS or Alicloud. Use Docker for containerization and Kubernetes for cluster management. Certik values secure communication and robust firewall configurations, so highlight these skills.
Security: Certik emphasizes blockchain security. Learn private key management with tools like HashiCorp Vault, DDoS prevention strategies, and backup/recovery planning.
Automation: Automate node deployment and monitoring using Python, Bash, Terraform, or Ansible. Certik may assess your ability to script alerts and performance tracking.
Certik often tests on node scalability, chain optimization, and handling infrastructure challenges. Expect hands-on tasks like deploying nodes or troubleshooting issues. Prepare with real-world practice and emphasize your ability to secure and scale blockchain systems.
