Andrey Arapov
Senior DevOps & SRE Engineer | Linux Expert | Open Source Contributor
17+ years building and scaling secure, high-performance Linux/UNIX infrastructures for enterprise, blockchain, and cloud-native environments. Proven track record in automation, container orchestration, GPU cluster administration, and performance tuning. Contributor to multiple high-impact open-source projects including the Linux kernel, Qubes OS, NixOS, and Kubernetes.
Core Competencies
- Infrastructure & DevOps: Kubernetes, Docker, containerd, Proxmox, VMware, Terraform, Ansible, SaltStack
- Monitoring & Observability: Prometheus, Grafana, Netdata Cloud, ELK stack
- Programming & Scripting: Bash, Python, Go
- Security & Networking: TLS/x509, Penetration Testing, Linux Hardening (grsecurity), MikroTik, VPNs
- Virtualization: Proxmox VE, KVM, VMware ESXi
- Blockchain & Decentralized Infra: Akash Network, Cosmos SDK, Bitcoin node ops & mining
Professional Experience
Overclock Labs / Akash Network — Senior DevOps & SRE Engineer
Prague, Czechia | Apr 2022 – Jul 2025
- Deployed and managed Linux OS on bare-metal GPU clusters (NVIDIA A100/H100/H200) used for high-performance decentralized compute workloads.
- Maintained and monitored Linux infrastructure with a security-first approach — applying kernel patching, compliance hardening, and proactive monitoring.
- Managed Akash product deployments including blockchain nodes and provider components, ensuring stability and uptime.
- Led architecture reviews and consulted enterprise clients on scaling blockchain nodes and providers.
Stack: Linux, Kubernetes, Docker, containerd, Proxmox, Ansible, Terraform, Grafana, Netdata, Cosmos SDK
Cisco — Senior DevOps Security Engineer
Prague | Nov 2017 – Apr 2022
- Managed large-scale Linux infrastructure hosting critical security products.
- Implemented centralized monitoring & alerting with Prometheus, Grafana, and ELK stack, improving incident response times by 30%.
- Automated system patching and compliance enforcement using SaltStack.
Stack: Linux, ELK, SaltStack, Prometheus, Grafana
GoodData — Senior DevOps Engineer
Prague | Aug 2015 – Oct 2017
- Orchestrated containerized services with Docker, Kubernetes, and OpenStack for enterprise analytics platform.
- Built security controls and CI/CD automation pipelines, improving deployment stability.
Stack: Docker, Kubernetes, OpenStack, Python, Puppet, Splunk, Grafana, Icinga
Novartis — Senior Linux/UNIX Engineer, Team Lead
Prague | Dec 2013 – Jul 2015
Note: Provided IT services to Novartis as a “redtoo ag” contractor (which was later renamed to Axians ICT CZ)
- Migrated 500+ Linux/UNIX accounts to Active Directory using Centrify — enabling centralized authentication, SSO, and audit traceability.
- Led UNIX engineering team delivering enterprise-grade infrastructure services.
Stack: Linux, UNIX (AIX, HP-UX), Centrify, VMware, Bash, Python
IBM — Technical Lead, SME, Systems Administrator
Brno | Feb 2009 – Nov 2013
Note: Provided IT services to IBM as a “ManpowerGroup” contractor until I got hired by IBM directly in 2010 August.
- Directed multi-country teams for large-scale UNIX/Linux transformations, including pSeries network migrations to 10GbE.
- Managed 300+ UNIX servers (AIX, HP-UX, Linux) across global enterprise environments.
- Awarded IBM “Big Blue” Excellence Cup for successful zSeries → pSeries migration.
Stack: AIX, HP-UX, Linux (RHEL, SLES), VMware, Bash, Python
Certifications
- Cryptography I – Stanford University
- Cryptography – University of Maryland
- ITIL V3 Foundation Certificate
Languages
- English — Full Professional
- Russian — Native
- Czech — Limited Working
Open Source Contributions
Qubes OS, NixOS, socat, ownCloud/Nextcloud, Roundcube, Docker, Kubernetes, Ansible, SaltStack, Akash Network.
First Linux kernel patch at age 19 (2007) adding device support for legacy hardware.