Available for hire

Serge Kulnev

System Administrator / DevOps Engineer

Summary

System Administrator & DevOps Engineer with 10+ years of experience across logistics, financial services, construction, and the public sector. I build and maintain hybrid infrastructures on AWS, Azure, and on-prem, bridging Linux and Windows ecosystems with a focus on automation, security, and reliability.

Over the years: migrated legacy Oracle/WebSphere stack to PostgreSQL/WildFly saving $100K/year, built a platform from scratch on 80+ servers with full CI/CD, and at the height of COVID ensured 100% remote work for the entire company at FODD.

Outside of infrastructure work, I build software products: iOS apps on the App Store and SaaS platforms, which you can explore below.

App Store & Hobby Development

In my free time, I build software across different domains. Recently launched my first native iOS applications.

10 Words Icon

10 Words: English Daily

Minimalist vocabulary builder for English learners.

2000+ Downloads
App Store
Flick Checkers Icon

Flick Checkers

Classic checkers reimagined with smooth physics.

App Store
Translucid Icon

Translucid: Speak & Translate

Real-time translation and subtitles

App Store
Trucker Route Icon

Trucker Route: 511 Hazard Map

Real-time hazard map for professional drivers: road incidents, severe weather, mountain pass status, wildfires, smoke plumes, and USGS earthquakes — all on one interactive map.

App Store

Web Developments & SaaS

Full-stack web applications and platforms.

VibeWShield Icon

VibeWShield — Security Scanner for AI-Generated Apps

production
View Project ↗

Free black-box security scanner for apps built with AI tools (Lovable, Bolt, Cursor, Replit, v0). Submit a deployed URL — no source code or agent needed — and get results in under 3 minutes. Runs 50+ automated checks covering OWASP Top 10: SQL/NoSQL injection, XSS, SSRF, IDOR, exposed API keys, CSRF, JWT weaknesses, and more. Generates AI-powered fix prompts compatible with Cursor, Claude, and ChatGPT. Ships a PDF report. 100% free, no signup required.

Next.js TypeScript OWASP Top 10 Black-box Scanning AI Fix Prompts
CargoDzen Icon

CargoDzen — All-in-One Operations Workspace

production
View Case Study ↗

Comprehensive logistics platform (TMS) automating operations with Artificial Intelligence. Features AI OCR for documents, real-time tracking, safety compliance, and role-based access control.

Python/Flask PostgreSQL Google Gemini AI DigitalOcean
HackTheStore Icon

HackTheStore — ASO & App Store Optimization Platform

production
View Project ↗

Project is currently in active development. AI-powered ASO tools to track App Store rankings, analyze competitors, and optimize app metadata. Looking for testers with products for App Store.

SaaS ASO AI
Trucker Route Icon

Trucker Route: 511 Alerts & Weather

production
View Project ↗

Real-time road conditions and hazard monitoring platform built for commercial truck drivers. Aggregates live data from 40+ state DOT 511 systems, the National Weather Service, NASA FIRMS fire detection, NIFC wildfire perimeters, NOAA smoke plumes, USGS earthquake feeds, and FEMA disaster declarations — all on a single interactive map refreshed every 15 minutes. Includes traffic congestion layers, mountain pass chain requirements, state-by-state trucking statistics from federal sources (NHTSA, FMCSA, FHWA), and aggregated industry news. 100% free, no account required.

Real-Time Data 40+ State DOTs Weather & Hazards Trucking Statistics Traffic Map

Projects

Core Competencies

Containerization & Orchestration

Docker, Docker Swarm, Amazon ECS

Cloud & Virtualization

AWS (EC2, S3, RDS, VPC, Route53, CloudFront, MongoDB, Lambda, API Gateway), Azure (AD, VMs, Storage, Virtual Desktop), Cloud.ru, Yandex.Cloud, VMware ESXi / vCenter, Hyper‑V

IaC & Configuration

Terraform, Ansible

Monitoring & Observability

Zabbix, Grafana, Prometheus, PRTG, AWS CloudWatch

CI/CD & VCS

Jenkins, GitLab CI, Git, PowerShell, Bash, Python, Ansible Playbooks

OS & Server Tools

Linux (CentOS, Debian, Ubuntu, RHEL, FreeBSD), Windows Server (2008–2019), Active Directory (GPO, DNS, DHCP, DFS, PS, FS, WSUS)

Networking & Security

Cisco, MikroTik (RouterOS/SwOS), VPNs, Routing & Switching, pfSense, FortiGate, IP/Subnetting, Firewalls

Databases & Messaging

PostgreSQL, MySQL, MS SQL Server, MongoDB, Oracle 12c/19c, ClickHouse, RabbitMQ, Kafka

Email & Telephony

Microsoft Exchange, Asterisk IP Telephony

Enterprise IT Tools

Squid Proxy, Nexus Repository, Rocket.Chat, Imaging & Deployment Tools, Asset Management Platforms

Experience

System Administrator
TIRUS INC.
Apr 2024 – Present
  • Manage Windows Server, AD (GPO, DNS), and Ubuntu fleet for 60+ endpoints.
  • Implement Zabbix & Grafana monitoring, reducing unplanned downtime by 40%.
  • Migrate internal systems to hybrid AWS (EC2/S3) for scalable backups.
  • Train dispatchers on IT tools, cutting helpdesk tickets by 30%.
DevOps Engineer
SBERBANK
2021 – 2023
  • Administered 80+ RHEL/Ubuntu servers; reduced recovery time by 60%.
  • Automated 95% of CI/CD pipelines using Ansible & Jenkins.
  • Migrated Oracle/WebSphere to PostgreSQL/WildFly, saving $100K/year.
  • Hardened production environments and streamlined test delivery.
System Administrator
FODD
2020 – 2021
  • Upgraded Active Directory (2008→2016), reducing login issues by 30%.
  • Deployed Zabbix monitoring, reducing critical incidents by 25%.
  • Enabled 100% remote work during pandemic via Azure Virtual Desktop.
  • Launched data center with IP telephony, enhancing cross-department communication.
System Administrator
TRANS MANAGEMENT
2015 – 2020
  • Scaled IT infrastructure for rapid growth (mixed Windows/Linux).
  • Established site-to-site MikroTik VPNs & Asterisk Telephony (saving $10K/yr).
  • Deployed HP/Dell servers with CentOS/Debian and 1C/PostgreSQL.
  • Managed procurement and license compliance for 130+ endpoints.

Certifications

  • Red Hat OpenShift I: Containers
  • Jenkins: Automating Delivery Pipelines
  • Terraform: Automate Provisioning
  • Ansible
  • Linux for Developers

Education

Bachelor of Computer Science and Information Security

Moscow Finance and Law University

Contact

Let's work together

Open for new opportunities in DevOps and System Administration.