Hossein Ebrahimi

Re-architected a Streamlit monolith into modular React/Python microservices, reducing bug resolution time by ~40%. Built per-service CI/CD pipelines with test and security scanning stages (Trivy/SonarQube) and improved average API response time by ~70% (900 ms → 250–300 ms) using Redis caching and PostgreSQL optimization.

Re-architected a Streamlit monolith into modular React/Python microservices, cutting bug resolution time by ~40%. Improved deployment reliability by ~35% using per-service CI/CD with security scanning, and accelerated API response time by ~70% (900 ms to 250–300 ms) via Redis caching and PostgreSQL optimization.

Designed and deployed an office network with MikroTik RB1100, Cisco PoE switching, VLAN segmentation, UniFi access points, and structured cabling. Implemented secure remote access with L2TPv3 (split-tunneling) and L2TP/IPsec, deployed Wazuh SIEM with MikroTik firewall hardening, and set up internal service networking including a self-hosted Git.

Delivered 24/7 NOC coverage as the primary escalation point for critical incidents across Windows Server and Linux. Automated onboarding with Active Directory, email provisioning, and Zulip using n8n, reducing provisioning time by ~70% and error rates by ~50% while improving MTTR by 25–30% with severity-based alerting and documented escalation paths.

Replaced Jira Service Desk with internal automated workflows, cutting licensing costs, reducing manual steps by ~50%, and improving HR/finance efficiency by ~30–40%. Redesigned the office LAN using MikroTik topology, enforced firewall/VLAN segmentation with Wazuh SIEM, and supported 170 employees across VPN, hardware, software, and connectivity issues.

Supported DevOps operations for a gaming donation platform, taking shared ownership of infrastructure reliability within a small team. Maintained high availability across a 4-server environment by implementing CI/CD, Docker containerization, and Linux hardening.

Scaled a live-streaming platform from ~3,000 to 100,000 concurrent users over 8 months by designing RTMP/Nginx-RTMP infrastructure for high concurrency. During a live event, scaled from 3,000 to 30,000+ simultaneous users in real time while keeping user loss below 7% through rapid fault diagnosis and capacity reallocations.

Migrated client workstations from Windows 8 to Windows 10/11 and installed/configured Windows Server components including DNS and DHCP. Managed Active Directory setup (users, groups, OUs) and joined workstations to the domain, configuring network printers.

Pursuing French language studies at EIIL, covering A1–A2 levels.

Completed/ongoing French language studies at EIIL, currently at A1–A2 level.

Completed an associate's degree in software engineering at Elmi Karbordi Khaneh Kargar University.

Completed an Associate's Degree in Software Engineering at Elmi Karbordi Khaneh Kargar University.