Fullstack software engineer Maciej Jaros, building mobile, web and desktop applications for clients across Silesia (Katowice, Gliwice, Zabrze, Chorzów) and globally. Stack: Next.js, React Native, Flutter, TypeScript, AI integration, cybersecurity.

Ideas don't build wealth.Products do.I'll build you a product people will pay for.

  • 1-on-1 partnership

    You talk directly to the person building your software. No middlemen, no time lost re-explaining the same vision.

  • You invest in outcomes, not in presence

    I don't sell time spent at the screen. You invest in a working solution that actually grows your business.

  • Full ownership

    I run the process end to end and take responsibility for the result. I stand behind my solution with a guarantee, and if I don't deliver the agreed outcome, you get your money back.

Find out how your idea can start earning.
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Maciej Jaros, fullstack software engineer building business software in Next.js, Flutter and React Native. Based in Katowice, Poland.

Engagement process

From first contact to the first line of code.

  1. Free consultation

    We set up a short, no-obligation call. You walk me through your project or business challenge, and I assess its feasibility and point you to the most effective way to build it.

    What you get: You get an expert opinion grounded in hands-on experience delivering IT projects. I point out the strengths of the idea, the potential risks and the recommended technology choices. The consultation is free, no-obligation and focused on concrete value. If I conclude I am not the best partner to build your project, I will tell you so directly.

  2. Clear estimate and timeline

    After analyzing the project I prepare a detailed estimate and a realistic work schedule. Before we start, you know exactly what the project scope, the cost and the planned delivery dates for each stage will be.

    What you get: Full transparency from day one. You decide based on concrete numbers, with no hidden costs, vague clauses or surprises along the way.

  3. Engagement terms

    We pick the engagement model that best fits your project, from delivering a fixed scope to long-term support and product development. We set clear rules, responsibilities and a way of communicating, so the whole process runs smoothly and without needless paperwork.

    What you get: Clear terms and a fast project start. Instead of losing time on formalities, we focus from the start on creating value for your business.

  4. Kickoff

    Once you decide, we move to action. I prepare the schedule, we agree the scope, and I start work on the agreed date. I keep communication clear and stand behind the quality of what I deliver, which comes with a guarantee.

    What you get: A smooth project start, full visibility over the work, and the assurance that delivery runs to the agreed plan.

Your idea deserves professional execution. Book a call and turn it into reality.

Work

Selected projects.

Products I took from idea to launch.

Solo, from design to launch
Hospitality / POS2026

Cigar Lounge OS

One system that runs the whole cigar lounge: a niche Toast, Square and Lightspeed overlook. The POS works offline too, alongside an owner back-office, a guest app, a marketplace, events and loyalty. An in-house product sold to lounge owners.

FlutterDartDrift (SQLite)SupabasePostgreSQL + PostGIS+3
Whole lounge, 1 system
POS, back-office, guest app and marketplace, for the niche big POS players skip
Tobacco tax + age
Excise tax & age-verification audit top POS systems don't advertise
Humidor audit trail
Immutable inventory log, every change leaves a trace
Solo, from design to launch
EdTech / GovTech2026

Online exams and automated certification

End-to-end web platform for running competency exams and issuing officially recognized qualifications. Four roles, automated numbered PDF certificates, and exams that survive a dropped connection with a server-side timer that can't be gamed.

Flutter WebDartSupabasePostgreSQLClean Architecture+3
4
Roles, each with its own panel
Intake → certificate
The whole exam lifecycle in one system
Zero data loss
Exam survives a dropped connection
Co-creator, web / mobile / backend
IoT + SaaS2026

Smart Room Display

An in-house product for offices and coworking spaces: meeting-room booking with elegant e-ink signage by every door. The experience of the market leaders at a fraction of the rollout cost. Ready for deployments and available to order.

FlutterDartSupabasePostgreSQL (RLS)E-ink display+1
Lower cost per room
The market leaders' experience without their deployment cost
Live status
Real-time room availability
Zero upkeep
Managed centrally from the dashboard, no on-site service visits

Got an idea or a problem to solve? Let's talk.

Expertise

Not for everything. For this.

Six areas of expertise, from MVP to production-grade products. I focus where I actually ship stable outcomes.

Flutter
Dart
Swift
Kotlin
iOS
Android
Next.js
React
TypeScript
Node.js
Tailwind
Firebase
Supabase
Postgres
Stripe
Vercel
Figma
Flutter
Dart
Swift
Kotlin
iOS
Android
Next.js
React
TypeScript
Node.js
Tailwind
Firebase
Supabase
Postgres
Stripe
Vercel
Figma
Flutter
Dart
Swift
Kotlin
iOS
Android
Next.js
React
TypeScript
Node.js
Tailwind
Firebase
Supabase
Postgres
Stripe
Vercel
Figma
Flutter
Dart
Swift
Kotlin
iOS
Android
Next.js
React
TypeScript
Node.js
Tailwind
Firebase
Supabase
Postgres
Stripe
Vercel
Figma

FAQ

Common questions before kickoff.

If your question isn't here, let's cover it on a call. You'll get the answer in writing afterward.

Contact

Let's talk about your project.

Tell me what you're building, I'll reply with concrete notes and the date I can start.

Engagement type