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AI product delivery · Frontend systems · Technical leadership

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

Focused diagnostics, delivery sprints, and Staff-level engineering for teams that need a critical initiative moved forward without another full-time hire.

Hiring for a role? View engineering profile

Available for selected consulting engagements and staff engineering opportunities.

Proof, in production

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Problems I help teams solve

If one of these sounds familiar, we should talk.

I work on a small set of expensive problems — the kind that stall roadmaps, burn senior engineers, and don’t respond to adding more people.

The AI prototype won’t become a product

A demo impressed everyone, but turning it into a reliable workflow — grounding, permissions, fallbacks, approval steps — keeps slipping.

The frontend platform fights every change

Your React/TypeScript codebase has become slow, fragile, and expensive to change, and a rewrite feels like the only way out. It usually isn’t.

A critical initiative is blocked

A migration, integration, or cross-team effort has been ‘almost done’ for months, and nobody owns it end to end.

Your product must live inside someone else’s platform

A product has to operate reliably inside browsers, design tools, or enterprise platforms — with their sandboxes, review processes, and breaking changes.

You need Staff-level judgment, not another hire

The team is good but stretched, and the decisions piling up need someone who has shipped this class of system before.

Services

Three ways I take ownership.

Each service starts from a business problem and ends with something shipped — not a slide deck.

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.

  • An AI feature that ships — with defined behavior for the unhappy paths, not just the demo path
  • A workflow your enterprise customers’ security teams can approve
How this works →

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.

  • A measured, prioritized picture of where performance actually goes
  • Critical flows made demonstrably faster and more reliable
How this works →

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.

  • A stalled initiative moving again, with a plan people actually believe
  • Decisions documented and owned, not accumulated by accident
How this works →

Selected work

Organized by problem, not by year.

A few engagements that show how I work when the stakes are real.

How engagements grow

Start small. Expand only when it earns it.

  1. Step 1

    Strategy session

    One focused call on your problem. Smallest useful commitment for both sides.

  2. Step 2

    Diagnostic

    A few days inside the real system. Root causes and a plan, not opinions.

  3. Step 3

    Delivery sprint

    Fixed-scope, hands-on ownership of the critical work until it ships.

  4. Step 4

    Ongoing advisory

    Fractional Staff-level direction once trust is established.

For businesses

Need help with a product, AI, frontend, architecture, or delivery problem?

Services, engagement models, process, and how to start — all on one page.

Explore consulting

For hiring teams

Evaluating Leonid for a Staff or senior-level engineering role?

A concise engineering profile: experience, strengths, selected achievements, and the résumé as PDF.

View engineering profile

Tell me what is blocked, underperforming, or difficult to ship.

I will tell you whether I can help — and what the smallest useful next step would be. If I’m not the right person, I’ll say so.