Blockchain: what's blockchain network, protocols, types of consensus, cryptography;
Cloud experience: AWS (EC2, ECS, Secrets, S3, CloudFront, Lambda, CloudWatch), Google (BigQuery, Cloud Function, GKE, Secret Manager, Artifact Registry), OVH (bare-metal, public cloud);
Operating systems: Linux (maintenance, monitoring, troubleshooting, security);
Containers and orchestrations: Docker, Docker Compose, Kubernetes;
Programming: Bash, Golang (preferred), Python, JavaScript (code reading);
Infrastructure as Code: Ansilbe, Terraform;
Load balancing: HAProxy, Nginx;
Database management: PostgreSQL, MySQL;
In-memory database management: Redis, Memcached;
Monitoring tools: Grafana, Prometheus, Loki;
Secrets management: HashiCorp Vault;
CI/CD: GitHub Actions (preferred), Cloud Build;
Communication: English B2+, skills to communicate with 3rd - party customers, strong problem solving.

Nice to have (otherwise can be learned while working with us):

Understanding of crypto economics (what is staking, how token emission works, and so on);
Blockchain protocol analytics (Python and Jupyter notebook stack).