Sebastian Musiał

Problems

This is where money usually leaks

Not in the technology — in the processes that can't keep up with the business. See if any of this sounds familiar.

Forms, emails, inquiries — everything lands in an inbox and waits. The reply comes hours or days later, when the customer has already picked the competition.

Automatic lead qualification and instant replies. The customer gets a response in seconds, not hours — while they're still 'hot'.

Manually entering data, moving information between systems, building reports in Excel. People are doing work a system could easily handle.

Automations that take over repetitive tasks. The team gets their time back and focuses on what actually drives revenue.

CRM, documents, emails, Slack — the data is everywhere, but it's hard to draw conclusions or quickly find what you need.

AI that searches and analyzes your data in real time. Answers and insights on demand, no manual digging.

You have an idea for a product or improvement, but execution means months of work, a team, and a big budget. End result: the idea never leaves the planning stage.

Fast MVPs and an iterative approach. First version in weeks, not months — you can test ideas before spending big money.

There were attempts, there were tools, there were experiments — but no real impact on the business. Lots of noise, little outcome.

An ROI-driven approach. I deploy AI only where it actually grows revenue or cuts costs — no pointless experiments.

Let's see where you're losing the most

A short call, concrete takeaways, and ideas tailored to your business.

Book a free consultation

Services

How I solve these problems

I automate processes, boost conversion, and speed up rollouts — without unnecessary complexity or cost.

AI-powered apps

I build apps you can test in weeks, not months. Fast MVPs that let you validate the idea and grow without burning the budget.

Web apps
Mobile apps (iOS and Android)
Backend and APIs tailored to the business
AI integrations — chatbots, automations, content generation
Deployment and production environment
A working demo every 1–2 weeks

Sample technologies

Next.js
React Native
Angular
NestJS
TypeScript
OpenAI
WordPress

Full-Stack AI Engineer

I'm a full-stack AI engineer with 10+ years of experience. I help companies automate processes, boost conversion, and ship products faster. I build solutions where AI actually does the work — handling customers, analyzing data, and eliminating manual labor.

@boldare/openai-assistant

100+ ★ on GitHub

9 npm packages

Tooling for OpenAI

sebastian@dev ~ %

$ whoami

Sebastian Musiał — Full-Stack AI Engineer

10+ years of experience · Poland

$ skills --top

Frontend React · Next.js · Angular · React Native

Backend NestJS · Node.js · Fastify · Express

AI OpenAI · Anthropic · LangChain · MCP

$ status

✓ Available for new projects

10+

Years of experience

Full-stack web & mobile

100+

Projects

From MVP to scale-up

npm packages

Open-source projects

200+

★ on GitHub

Open-source

Client testimonials

What my clients say

See how my work has helped companies achieve better results with AI and automation.

5 / 5

Every YouTube video I publish now turns itself into an SEO blog post — fully on autopilot. Hours of manual work disappeared overnight, and my organic traffic finally started climbing. Concrete delivery, zero fluff.

Robert LiszkaFounder, robertliszka.pl

5 / 5

After 40 years in business, our website finally matches the quality of the engineering work behind it. Clean structure, fast load times, and a UI that helps clients grasp what we do in seconds. A genuinely professional collaboration.

Hartigan Consulting Engineershartigan.co.uk

5 / 5

Bookings went up — that's the simplest way to put it. The new site is fast, mobile-friendly, and gives our classic wedding taxi exactly the elegant image it deserved.

Taxi LondonWedding car rental

5 / 5

We worked together for nearly two years on the same project, and I know one thing — his code barely needs a tester. Dedicated, focused, and one of the best frontend developers I've worked with in seven years of QA.

Diana PrincipeISTQB Certified QA Analyst

Questions

Knowledge base

Answers to the most common questions about working together, technologies, and the delivery process.

We start with a 30-minute consultation. Then you get a concrete plan and a quote. We work iteratively — every 1–2 weeks you see a working demo and decide what's next.

First demo usually within 1–2 weeks. Simple automations even faster. You don't wait months for results.

You can continue working with me (development, support) or take over the project. The code is clean and ready for further development.

Yes — 100%. You get full access to the repository, documentation, and infrastructure.

It depends on the scope. After a short call you get a clear quote and timeline. No hidden costs, no surprises.

Yes. We can start with an automation, an MVP, or a short consult. Small rollouts often deliver the fastest return.

Yes — I work with clients all over the world. Communication: Slack, email, video calls.

In many cases yes — but not always. During the consultation I'll show you concrete use cases tailored to your business, or I'll tell you straight up if it doesn't make sense.

Have another question? Drop me a message

Let's talk
about your project

The consultation is free and no-strings-attached. We'll review your needs and I'll suggest concrete solutions.

Book a meeting

I build apps that work for you

This is where money usually leaks

Leads come in, but no one handles them fast enough

Your team is doing things humans shouldn't be doing

You have the data, but you can't make use of it

New ideas get stuck at 'who's going to build this?'

AI sounds great, but it's not translating into results

Let's see where you're losing the most

How I solve these problems

AI-powered apps