headstack

• Operated as a one-person infrastructure team for 8 months: architecture decisions, incident response and post-mortems, direct client reporting, communication with chain foundations. • Solely owned 3 production bare-metal Kubernetes clusters running 6 mainnet validators and RPC nodes: full lifecycle from deployment and hard forks to governance, rewards withdrawal, delegator reporting and client SLA. • Launched 5+ validators and RPC nodes in mainnet from scratch based on my own launch research (stake economics, hardware sizing, HA/DR): from cluster rollout to monitoring and DRP. • Designed and implemented a hot-standby architecture for validators with multi-provider, multi-region redundancy: fast switchover with no double-signing risk. • Built 5+ CI/CD deployment strategies (fresh deploy, upgrade, switchover, DR) and 20+ Kubernetes Jobs automating validator and RPC node operations. • Containerized and adapted for Kubernetes 20+ blockchain clients with no native Kubernetes support; eliminated configuration drift across clusters, designed a management cluster to operate the others. • Developed 3 production Go services adopted across teams: a block-height-based health probe controller, health-driven DNS failover, and a generic metrics exporter. • Executed the Injective validator migration to Tokyo on a cost-optimized heterogeneous cluster with host performance tuning. • Built an AI-assisted workflow on Claude with custom skills encoding my research methodology: validator launch research time dropped from a full working day to 1-2 hours.

• Developed SLI/SLO monitoring based on RED metrics and a weighted composite index combining performance and availability, noticeably improving issue detection accuracy for the IAM platform. • Troubleshot a production IAM outage caused by 400+ non-recoverable goroutines; engineered Kubernetes load-testing manifests that guided fixes, boosting throughput from 3K to 14K RPS. • Implemented a concurrent Kubernetes CronJob in Go reliably producing sensitive billing data (8M+ messages daily) into Kafka with 99.9% data integrity and ~45% faster producing.

• Designed and deployed a highly available SSO platform on AWS EKS (Authentik) with ~95% IaC coverage: 24+ corporate app integrations, full platform bootstrap and disaster recovery within 1 hour. • Developed a Go migrator replacing 373 manually created AWS IAM users and 2,000+ policies with templated Terraform code, enforcing a declarative approach and security best practices. • Led AWS Control Tower setup and built Terragrunt templates for multi-account environments, reducing provisioning time from 2 days to 2 hours and saving ~$22K/month via cost tracking and optimization.

• Built 10 CI/CD pipelines with optimized job configurations, caching and lightweight Docker images, cutting build and pipeline run times. • Deployed and managed 10+ Kubernetes clusters (bare-metal and virtualized) from scratch, running 15+ containerized applications with high availability. • Automated system backups and maintenance with 32 Bash scripts, reducing manual intervention. • Pioneered IaC templates for core infrastructure (load balancer clusters, backup nodes, registry) using Ansible and Terraform, improving deployment efficiency and reliability.

• Migrated 3,000 business customers between legacy and new SBC configuration schemas, improving connection quality and voice offloading. • Migrated 3,000+ customer SIP Trunk connection records from .xlsx files to MariaDB. • Designed and implemented 100+ SIP connections for major clients, including Sberbank, Yandex, IVI, and government sector.

• Found and reported 10+ bugs in the VoIP distribution, improving product stability. • Delivered 30+ Asterisk integration projects for mid-to-large businesses. • Wrote 40+ technical articles for the company website. • Resolved 100+ helpdesk tickets. • Automated 20+ routine tasks using Bash, reducing clients' manual work.

• Maintained 200+ school computers. • Taught 200+ IT classes for students with disabilities.