My app is already built or live. Can you help?

Yes. I work on things that are already built, already live, or stuck somewhere between prototype and production. I review the scary parts, stabilize what matters, or fix the one thing that's on fire - depends what you need.

What does an AI Product Engineer do?

I build and fix software where AI is part of the real product, not a demo. That means the whole stack - data, auth, money paths, integrations, and the model is only one piece. If it only works in a screen recording, it is not done.

Do you only work before launch?

No. I work before you build, before launch, and on products that are already in the wild. Stabilization, hardening, rescue - I've done all of it. Pre-launch is one part of the job, not the whole offer.

Can you work with AI-generated or messy codebases?

Yes. I'm not grading your code for style. I care whether it holds up in production. I find the risks, fix what matters on the critical path, and a full rewrite is almost never the first move.

Do I need to rebuild from scratch?

Usually not. I start with what already works and what's actually risky, then the flows that matter. A from-scratch rewrite only when it really makes sense - and I'll say so if it doesn't.

What kind of projects does Aga Kadela take on?

I work on new products and broken ones. Usually B2B teams where the workflow is already real and mistakes are expensive.

Is Aga Kadela available for new projects?

I work with a small number of clients at a time. That's just what good work takes. If you already know there's a real problem to solve, email me at aga@agakadela.com.

What industries does Aga Kadela work with?

Mostly B2B. Real estate, construction, entertainment production, logistics. Businesses where the work is operational and the software has to stay accurate.

Los Angeles, CA

I build and fixAI productswhere productionmistakes costreal money.

Hi, I'm Aga

AI Product Engineer

B2B founders · Agencies · AI-powered SaaS · Production rescue

View portfolio Get in touch

Portfolio

A few things I've built, fixed, and rescued

Featured

E-Commerce Platform

SaaS

Checkout work for one of Europe's largest e-commerce platforms. Over a million users. Thousands of orders a day.

Under NDA. Details available on request.

1.5 years on a team where a small bad call in the wrong place could hit revenue or checkout the same day. You learn fast what a decision costs when the numbers are that loud.

ReactReduxStripeREST APIsTypeScript

Dotty

Launch Readiness

Invoice and payment portal built fast for validation. I went through it before launch - found what would break once real money was moving, and fixed it.

Found and fixed Stripe double-charge risk, invoice numbering under concurrency, Pacific off-by-one dates, secrets in the repo, missing CORS on Edge Functions, dependency debt. Shipped fixes plus a severity-ranked report.

ReactSupabaseStripeAnthropic APITypeScript

Read case study →View live →

FunnelScout

SaaS

B2B SaaS for GoHighLevel agencies. It connects to an account, runs scheduled AI analysis, and keeps usage inside the plan people paid for.

The hard part wasn't the model. It was schedules, speed, not burning through the AI budget, and everything else a real SaaS has to get right.

Next.js 16InngestDrizzleBetterAuthStripeClaude API

Read case study →View live →

LA Market Report Agent

AI Agent

Monthly real estate market reporting system for a private investor in Los Angeles.

Seven data sources. Eight research tasks running in parallel. One report produced every month without someone manually stitching the research together.

HonoInngestNeonClaude APIPuppeteer

In progress

Featured

E-Commerce Platform

SaaS

Checkout work for one of Europe's largest e-commerce platforms. Over a million users. Thousands of orders a day.

Under NDA. Details available on request.

1.5 years on a team where a small bad call in the wrong place could hit revenue or checkout the same day. You learn fast what a decision costs when the numbers are that loud.

ReactReduxStripeREST APIsTypeScript

Dotty

Launch Readiness

Invoice and payment portal built fast for validation. I went through it before launch - found what would break once real money was moving, and fixed it.

ReactSupabaseStripeAnthropic APITypeScript

Read case study →View live →

FunnelScout

SaaS

B2B SaaS for GoHighLevel agencies. It connects to an account, runs scheduled AI analysis, and keeps usage inside the plan people paid for.

The hard part wasn't the model. It was schedules, speed, not burning through the AI budget, and everything else a real SaaS has to get right.

Next.js 16InngestDrizzleBetterAuthStripeClaude API

Read case study →View live →

LA Market Report Agent

AI Agent

Monthly real estate market reporting system for a private investor in Los Angeles.

Seven data sources. Eight research tasks running in parallel. One report produced every month without someone manually stitching the research together.

HonoInngestNeonClaude APIPuppeteer

In progress

When it starts breaking

Something isn't right?

The product is live. Real users are in it, and the problems you didn't see in the demo are showing up. Stripe is double-charging. Someone saw data they shouldn't have. A flow that worked in the demo is failing in production.

I've seen this before.

Email me now at [email protected] and tell me what's happening. I'll get back to you today.

Email me now

About

I'm Aga Kadela. AI Product Engineer in Los Angeles.

The most expensive mistakes don't throw errors. You don't notice them until the revenue is wrong.

I learned that building checkout systems for over a million users. 1.5 years where downtime wasn't an option. You get a feel for what looks fine but will bite you later.

I bring that to every product I work on. I still think in revenue and production - not only in whether the build passed.

I'm in Los Angeles. I work with a small number of clients at a time. Usually people who want the thinking done, not just the code written.

Aga Kadela

What I do

Before You Build

Get the product direction straight - data, auth, how money moves, how AI fits - before the build locks in the wrong shape.

Explore service →

Launch Readiness Sprint

Built it fast - now make sure it can handle real users, real money, and the demo you are about to give someone who matters.

Explore service →

Production Rescue

Something broke - and it is hitting users, money, or the workflow the business actually runs on. I find the fault, fix what matters first, and tell you what happened in plain English.

Explore service →

Custom AI Build

You know the outcome you need. I build the system behind it - backend, data, money, schedules, the boring production stuff that has to work when it is not a demo anymore.

Explore service →

Process

How I Work

Scope

I find the real problem

Most product issues show up as bugs, bad prompts, broken flows, or messy code. I start by figuring out what actually needs to be fixed, built, or left alone.

Communication

You know where things stand

You hear about what's going on before you have to ask. If something changes, I tell you - not in the next standup, now.

Judgment

I know when not to build

I'll tell you when something isn't worth building. Sometimes there's a simpler path. Sometimes we should wait.

Handover

You leave with something you can own

You leave with a codebase you can actually own. Fixed, explained, and not dependent on me to maintain it.

Contact

Get in touch

If you need an AI product built, reviewed, or fixed - email me at [email protected].

[email protected]LinkedIn →GitHub →

FAQ

A few things people ask

My app is already built or live. Can you help?: Yes. I work on things that are already built, already live, or stuck somewhere between prototype and production. I review the scary parts, stabilize what matters, or fix the one thing that's on fire - depends what you need.
What does an AI Product Engineer do?: I build and fix software where AI is part of the real product, not a demo. That means the whole stack - data, auth, money paths, integrations, and the model is only one piece. If it only works in a screen recording, it is not done.
Do you only work before launch?: No. I work before you build, before launch, and on products that are already in the wild. Stabilization, hardening, rescue - I've done all of it. Pre-launch is one part of the job, not the whole offer.
Can you work with AI-generated or messy codebases?: Yes. I'm not grading your code for style. I care whether it holds up in production. I find the risks, fix what matters on the critical path, and a full rewrite is almost never the first move.
Do I need to rebuild from scratch?: Usually not. I start with what already works and what's actually risky, then the flows that matter. A from-scratch rewrite only when it really makes sense - and I'll say so if it doesn't.
What kind of projects does Aga Kadela take on?: I work on new products and broken ones. Usually B2B teams where the workflow is already real and mistakes are expensive.
Is Aga Kadela available for new projects?: I work with a small number of clients at a time. That's just what good work takes. If you already know there's a real problem to solve, email me at [email protected].
What industries does Aga Kadela work with?: Mostly B2B. Real estate, construction, entertainment production, logistics. Businesses where the work is operational and the software has to stay accurate.