Expertise

I have been in commercial development since 2016: B2B platforms at Sber and Yandex, government-facing systems, and since 2025 three products of my own. Along the way the work split into four lines, and each one grew deep enough to stand on its own. Pick the one you need — every page below is the same career told from that side.

  1. 01

    Lead Full Stack Engineer

    Systems that survive growth, a rewrite, and the third change of requirements

    Ten years designing web, mobile and server systems — as a product engineer, a tech lead and a founder. High-load B2B services at Yandex and Sber, and product ecosystems of my own: Toqen.app, Litseller, Start4Drive. I work the whole depth of a product: the architecture, the interface, the API, and everything it takes to keep the thing alive in production.

    System design ·Microservices ·Monorepo ·Code review ·Mentorship

  2. 02

    Security and Identity Engineer

    Zero Trust, passwordless, and what happens to a login once the password is gone

    I design authentication and access — the part of a system where a mistake is not a bug but an incident. I built Toqen.app: a passwordless platform with an OIDC provider, device-bound cryptographic verification and hardware-backed keys on mobile. Before that, protected corporate and government systems at Sber and Yandex, where the requirements on handling data were not negotiable.

    Zero Trust ·OpenID Connect ·OAuth 2.0 ·Passkey ·Passwordless ·TOTP ·Jose ·Argon2

  3. 03

    AI Integration Engineer

    LLM pipelines that run unattended and are still right the next morning

    I build production systems around language models — the unglamorous part: orchestration, validation, retries, cost, and the evaluation that tells you whether the thing still works. An automated content pipeline that generates, checks, edits and translates with no human in the loop. A streaming transcription module that turns speech into a structured document. Full stack underneath, so the model stays a component instead of becoming the architecture.

    OpenAI API ·Claude API ·LLM orchestration ·Prompt engineering ·Structured output ·RAG ·Speech transcription ·Evaluation harnesses

  4. 04

    Technical SEO Engineer

    Indexable, fast, and legible to the engines that answer instead of listing

    I work the infrastructure side of visibility: rendering, indexing, structured data and Core Web Vitals. Migrating a multilingual platform off client-side rendering, generating sitemaps and hreflang from the data rather than by hand, and getting a site into a state where a crawler and an answer engine can both actually read it. This site is the working example: eleven locales, generated structured data, and metrics held in the green by a check in CI.

    SSR / SSG / ISR ·Crawlability ·Schema.org (JSON-LD) ·Dynamic sitemaps ·robots.txt ·Canonical ·Hreflang ·IndexNow