25+ yrs 100+ projects Pre-AI era Available

I fix what AI built.

Alexander Schwarzmann

Hi, I'm Alexander (Sasha) Schwarzmann. 25+ years building for the web. I specialize in React, TypeScript, and design systems — but I take ownership end to end: architecture, APIs, testing, CI/CD, deployment. I help teams turn fragile AI-generated codebases into maintainable software. Previously at RapidAPI, Propel, and Courier. Available for new projects.

Sound familiar?

It worked, then I asked for one more feature and everything broke.
My Cursor project hit 200 files and now AI can't follow the codebase.
We shipped fast with AI, but now every change causes three new bugs.
The prototype looks great. I just can't get it to production.

How it works

01

Intake

30–45 min call. Goals, symptoms, constraints, repo access.

02

Diagnosis

Codebase mapping — hotspots, coupling, risk register. You see the full picture before any code changes.

03

Execution

Roadmap + quick wins, or weekly implementation with measurable checkpoints. Merged PRs, not slide decks.

NDA-friendly. Read-only access until you're comfortable.

Engagements

Model Rate
Architecture Audit / Fixed scope · 5–7 days $3–5K
Refactor & Stabilize / Weekly · min 2 weeks $4–6K/wk
Production Hardening / Project-based $10–15K

Architecture Audit

"We need clarity before we touch anything."

A deep review of your codebase — structure, dependencies, pain points. You get a clear picture of what's wrong and what to fix first.

You get

  • Prioritized issue report (severity + effort + impact)
  • Dependency and coupling map
  • Refactoring roadmap with quick wins
  • 60-min walkthrough with your team

I need: Repo access (read-only is fine), build instructions, 30 min of context.

Not included: Shipping features, redesign, large rewrites.

Discuss this

Refactor & Stabilize

"We need stability while we keep shipping."

I restructure your components, establish patterns, and add guardrails so your team can ship with confidence again.

You get

  • Restructured component architecture
  • Shared patterns and conventions
  • CI guardrails and coverage ratchet
  • Weekly memo: what changed, what risk dropped, what's next

I need: Repo + staging, async contact for questions, CI access.

Not included: 24/7 support, product management, rewriting everything from scratch.

Discuss this

Production Hardening

"We're close to launch, but production will punish us."

I fix what's breaking, speed up what's slow, and prepare your application for real users at real scale.

You get

  • Critical bug resolution and root cause removal
  • Performance report (before/after)
  • Deployment pipeline with gates and rollback plan
  • Release readiness checklist

I need: Repo, production/staging access, error logs.

Not included: Big feature development, replatforming, multi-month migrations.

Discuss this

Architecture

Hand-crafted decisions — all predating the AI era.

Full-Stack Migration

2016

Backbone and CoffeeScript to React and GraphQL — a controlled, incremental migration at crealytics that never stopped product delivery. Not a rewrite. A transformation.

Polymorphic Type System

2021

A single prop changes the rendered element — Button becomes a link, Box becomes a section — with full TypeScript inference and ref forwarding. Applied consistently across 42 components.

Component Layering

2022

42 primitives compose into 18 business-specific widgets. A pricing page isn't a monolith — it's Box, Typography, Button, and Card. Consistent by construction, not by convention.

Coverage Ratcheting

2022

A testing discipline where the quality bar can only rise. Every merged pull request either maintains or raises the coverage threshold. Once a line is tested, it stays tested.

AI Era

Same engineering discipline — now applied to AI itself.

AI-Guided Development

2024

Architecture guides, handoff protocols, and permission boundaries that turn AI into a disciplined contributor. AI follows the established patterns — not its own instincts.

Record/Replay Transport

2025

How do you test something that answers differently every time? Record real AI responses as fixtures. Replay them deterministically in CI. Full-fidelity testing of AI pipelines — zero cost, zero flakiness.

Drift Sentinel

2025

AI outputs shift with every model update. A sentinel compares each pipeline run against golden snapshots — when structure drifts beyond thresholds, the build breaks before it reaches production.

Embeddable Architecture

2024

A React library that lives inside any host application without conflicts. Namespaced CSS, Shadow DOM compatibility, iframe-less embedding — the component adapts to its host, not the other way around.

What others say

"I can rely on Sasha to own a large domain. He would be able to cut through ambiguity, drive feature development, and maintenance."

Yenny Cheung, VP of Engineering

"Communication is great, code is quality, price is fair and delivery is fast."
"He not only did what I asked him for, but brought up ideas to improve the project."

FAQ

Can you work with limited access?

Yes. I can start with read-only repo access and increase from there.

Do you work under NDA?

Yes. Happy to sign before any code is shared.

What do you need to start?

Repo access, build/run instructions, and one 30-minute call.

Is this hourly billing?

No. Fixed scope or weekly — dedicated capacity, not hourly tracking.

Have a vibe-coded project that needs structure?
Send me the repo and 3 pain points.

Reply within 24–48h. Briefly describe: stack, repo size, top 3 pain points.

GitHub X LinkedIn