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Leonid Kuznetsov

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Leonid Kuznetsov

AI Product & Frontend Systems Consultant · Staff-level Engineer

js.leonid.kuznetsov@gmail.com
www.leonidkuznetsov.xyz

What I do

I help SaaS teams turn stuck AI initiatives and fragile frontend systems into production software that ships.

Problems I solve

  • AI features stuck between prototype and production — grounding, permissions, fallback states, approval flows, integrations.
  • React/TypeScript platforms that have become slow, fragile, and expensive to change.
  • Critical initiatives — migrations, integrations, cross-team efforts — that are stalled or at risk.
  • Plugins and extensions that must work reliably across host-platform sandboxes and review processes.
  • Teams that need Staff-level judgment without another full-time hire.

Core services

AI Product Delivery. For teams whose AI feature is stuck between demo and production. I build the workflow layer — grounding, permissions, fallbacks, human approval — that makes AI reliable enough to ship to real customers.

Frontend Modernization & Performance. For teams whose React/TypeScript platform has become slow, fragile, or expensive to change. Profiling-driven diagnosis and incremental fixes — measured, and without stopping feature delivery.

Fractional Staff Engineer. For teams that need Staff-level ownership of a stalled or high-risk initiative without a full-time hire. Clear direction, stakeholder alignment, and hands-on delivery of the most critical parts.

Specialist capabilities. Frontend Development & Architecture · Web3 Wallet & Transaction UX · Browser Extensions & Plugin Platforms · Enterprise Integrations & Identity.

Selected product environments

Writer (Enterprise generative AI platform) · LottieFiles (Motion design platform) · Zenseact · Volvo Cars (Autonomous driving software) · Cato Networks (SASE network security) · MEGOGO (OTT media streaming) · Web3 products: CTRL, Unizen, OneArt, HookRank (wallets, DEX, NFT, analytics)

Engagement models

Technical Strategy Session — 60–90 minutes.

Product & Architecture Diagnostic — 3–5 days.

Implementation or Rescue Sprint — 2–4 weeks, fixed scope.

Fractional Staff Engineer / Technical Advisor — Monthly engagement.

Next step: Discuss a consulting engagement (js.leonid.kuznetsov@gmail.com) or use www.leonidkuznetsov.xyz/contact with a short description of what is blocked, underperforming, or difficult to ship. Remote for US and international teams, with practical overlap for US working hours.