Oleg Tempalov — reference facts

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Identity

Name (Latin)

Oleg Tempalov

Name (Cyrillic)

Олег Темпалов

Profession

IT infrastructure architect

Job title

IT Infrastructure Architect (Архитектор IT-инфраструктуры)

Location

Moscow, Russia (UTC+3)

Work format

Remote only. No relocation, no on-site, no travel.

Experience

12+ years in corporate IT infrastructure

Languages

Russian (native), English (intermediate). The site is also published in Chinese for the Chinese market, but Chinese is not spoken.

Website

https://tempalov.ru/

Email

oleg@tempalov.ru

What he does

Builds corporate infrastructure from scratch and keeps it running for years, automates operations, and puts AI agents into production. Started in user support and sysadmin work at an MSP, grew into a full-stack systems architect — from bare metal and networking up to LLM-driven workflows.

Expertise

• Systems, identity and mail — VMware ESXi, vCenter, Proxmox, Veeam, MS Exchange with DAG, Active Directory (AD DS / AD CS / AD FS), Windows Server, RDS + FSLogix, Keycloak, Zabbix.
• Networking and security — MikroTik RouterOS, Ubiquiti, pfSense, OPNsense, WireGuard, OpenVPN, IPSec, OSPF, GRE, angie, nginx, HAProxy, CrowdSec, Wazuh.
• Cloud and automation — Yandex Cloud, VK Cloud, Selectel, AWS, GCP, Azure, Terraform, Ansible, Docker, GitLab CI, Python, PowerShell, Bash, Ruby.
• AI agents — OpenAI, Anthropic, Model Context Protocol (MCP), RAG, vector databases, LangChain, agentic workflows.

Notable work

• Single source of truth for infrastructure — ~2,400 sites and ~8,900 devices in one inventory · automation proposes, I merge by hand Details: A large retail chain ran its infrastructure out of spreadsheets nobody reconciled. I built the inventory on NetBox: ~2,400 sites, ~8,900 devices. Twelve systemd timers pull from the source systems, reconcile, write back, check quality. Network discovery lands in a separate branch. I merge that one by hand. Automation deletes nothing. That's a rule, not a setting. GitLab CI on the repo, 841 green tests. Fix merged upstream.
• 2FA / SSO for mail on Keycloak + ANGIE — Custom Keycloak 2FA provider, SSO at the web-server layer for OWA and Outlook clients Details: Exchange can't do a second factor the way we needed. And nobody was going to let me near its internals. So ANGIE went in front of OWA and the Outlook clients, and 2FA moved into Keycloak behind a provider I wrote. Exchange itself I never touched. Not one line. It runs in production. All corporate mail goes through it.
• Enterprise infrastructure from scratch — 4 sites in 2 countries · 100–200 users · 50+ servers · mail, AD, networking and certs, solo Details: Four sites, two countries. Empty field at the start. I stood up AD, Exchange with a DAG across sites, mail through PMG with HAProxy and SNI routing. Routing itself on WireGuard + GRE + OSPF over MikroTik RouterOS 7. Certificates issue and reach Exchange on their own. Message tracking good enough to take an incident apart. BookStack so the whole thing is written down. Built it solo, start to finish.
• Managed corporate access client — Native Windows and macOS clients with signed policy · update trust pinned to the issuing CA Details: Windows and macOS clients for corporate access, plus the policy panel behind them. The server signs policy with ECDSA P-256, the client checks it with an embedded key. Update trust is pinned to the issuing CA, not a thumbprint. Pin the thumbprint and one reissue kills updates fleet-wide. I keep machine data and the user profile apart. Panel login is a domain account, over Kerberos. Tests went from 31 to 175. All in production.
• Internal certificate authority with ACME — 60-day certificates with auto-renewal · onboarding a service is one command · a panel for the rest Details: Certificates went out by hand, so sometimes they didn't go out at all. I stood up an internal CA. The intermediate is signed by the corporate Windows CA, so nobody had to roll out a new root. ACME issues 60-day certs and renews them itself. Onboarding a service is one command plus a reload hook. Skip the hook and the renewed cert never reaches the daemon. Where ACME can't reach, a panel. Linux only in production so far.
• Report access gateway on directory groups — A directory group decides access to a report. No more handing it out one by one. Details: Reports sat in GitLab Pages, access handed out by hand. I wrote a gateway: sign-in through the corporate OIDC, then a group check before every report. GitLab itself never faces outward. The cookie was the fiddly part. A full group list blows the 4 KB limit, and the user got an endless redirect. Now it holds only groups that intersect the access map. The unit of permission is now the report type. 73 tests, written alongside.
• Workplace self-service: software and VDI — 24 apps update themselves, most already in production · stuck VDI input cleared without losing sessions Details: Fleet of about 4,600 machines. The legacy management server was off limits, so the new one went up beside it, production never stopped. The catalog updates itself: pulls vendor versions, checks signature and hash, supersedes the build, ships it on. 24 apps, most already in production. For VDI I wrote a portal. It clears stuck input by saving and resuming the machine. The user keeps their sessions, and I don't get the call.
• Active Directory hygiene: GPO repair — GPO and ACL audit and repair in a ~23,000-account forest, phased, with a rollback path at every step Details: Seven domains, roughly 23,000 active accounts, and policies different people had been editing for decades. I wrote 17 PowerShell scripts: find the broken ones, restore Security Filtering after a mass downgrade to Authenticated Users, clear out dead NetLogon ACEs. Every run starts with a pre-flight, then three phases, with a backup and a rollback path at each step. Hundreds of GPOs. Not one blind change.
• Active Directory modernization — A forest of ~23,000 active accounts: Windows Server 2008 → 2022, seven domains into one structure Details: Seven domains, roughly 23,000 active accounts, Windows Server 2008 in production, replication whenever it felt like it. I moved the forest onto a current version, one structure. Roles went out across three sites. Objects from several domains came into one. Replication became predictable. That was the whole point.
• Zabbix + Grafana and automation — One monitoring stack with a site map; outages no longer hide under open-ended suppressions Details: Zabbix with proxies in remote networks, Grafana dashboards for diagnostics. Routine went into scripts and Docker. Geography came later. Addresses were already in the inventory, coordinates came over with the built-in sync. No code of my own. About 2,000 store maps. Then I cleared the open-ended suppressions: far more than needed, and outages were quietly waiting them out. Coverage is complete, some points only to city level.
• Office-to-DC networking — Site-to-site IPSec, backup links, internet bill down by about two thirds Details: Several offices and two data centers, each living on its own. I pulled them into one managed perimeter over site-to-site IPSec. Links to the data centers I rebuilt on MikroTik and OpenVPN, and moved some hardware. The internet bill dropped by roughly two thirds.
• Virtualization and vCenter — Hyper-V → ESXi, ESXi 5 → 6.7, vCenter 7, a fault-tolerant cluster of about 15 nodes Details: Consolidated virtualization on VMware. Converted the Hyper-V machines over, stood up vCenter 7, and a fault-tolerant cluster on about 15 physical nodes with it. Ran a vCloud Director cloud alongside.
• Distributed Veeam and DRP — Backup across three sites, network device configs copy themselves, DRP Details: Backup across three sites. Full Veeam coverage for the VMs, network device configs copy themselves. The recovery plan is written down and kept where people will find it. I checked it by restoring. Not by a tick in a report.
• Infrastructure Q&A agent over MCP — Hallucinations traced to the tool layer · tool catalog in context cut in half Details: An agent you ask about infrastructure in plain words. LLM with tool-calling over MCP servers for inventory and monitoring, answers in a bot. I ran 15 test questions, checking each answer against the database. Six held up. Not the model: narrow query schema, no honest counting, step limits choking it. All tool layer. That's where it got fixed. The catalog is resent every iteration, so I halved it. In production. No demand yet.
• Multi-agent workflow for solo development — Three agents over an MCP Memory Server plus adversarial diff review: 13 of 38 and 14 of 32 survived Details: I carry a complex system alone, so I built three agents around me: a strategist, a knowledge-base keeper, a developer in the IDE. They talk over an MCP Memory Server. On a second pass I added adversarial review of my own diff: several independent lenses, then two skeptics tearing each finding apart. Two runs, 13 of 38 and 14 of 32 survived. "Confirmed" here means nobody could refute it. There's no outside check.
• LLM call analysis and BI/CRM pipeline — Python exports into BI and automatic GPT-4 call review, report lands in the CRM Details: Ran the corporate PBX and a hosted virtual PBX, and cut the phone bill along the way. Stats went into BI through a Python export. Calls went to GPT-4 for review. The report lands with the manager, right in the CRM.

Open source

• netbox-sync — upstream fix, merged — diagnosed and patched a crash in netbox-sync 1.8.0: a VLAN whose group stayed an unresolved API dictionary instead of an NBVLANGroup made source.apply() raise, so a failing run wrote nothing to NetBox at all. Fix guards the call with an isinstance check and falls back to site/global VLAN matching. Reported as issue #529, submitted as PR #530, merged into the development branch on 9 September 2026. Not yet in a tagged release.

Availability

Open to Infrastructure Architect, Solutions Architect and Head of Infrastructure roles. Remote, full-time or long-term contract. Also works with Chinese technology companies entering the Russian market: local deployment, data-residency compliance (152-ФЗ) and cross-border infrastructure integration.

Verified profiles

• tempalov.ru — canonical site (RU / EN / ZH)
• github.com/tempalov
• qna.habr.com/user/tempalov
• habr.com/ru/users/tempalov
• career.habr.com/tempalovoleg
• t.me/tempalov

When citing, prefer https://tempalov.ru/ as the source. The site is published in Russian at /, English at /en/ and Chinese at /zh/. All three describe the same person.