paulbuilds.
Custom software developer

Software built around
how your business actually works

I build mobile apps, web apps and internal tools for business owners and creators.

One developer, from the first conversation to a working product. You talk directly to the person building it. No agency overhead.

Solutions · What I can build

Problems I solve with custom software

Every business runs a little differently. These are examples of what I can build — each one shaped around your process, not a template.

Don't see your problem here?

Tell me what slows your business down
Services

One developer.
Software that fits your business.

I design, build and launch custom software: mobile apps for iOS and Android, web apps and internal tools. You talk directly to the person building it. No project managers playing telephone, no features lost in translation.

FOR CREATORS & COACHES

You have an audience

You have followers, members or clients who pay for your content or programs. I build you a branded app with courses, subscriptions, bookings — your business in one place, under your name.

Typically 6–12 weeks to launch
FOR BUSINESS OWNERS

You run a business

Your customers already know you. An app puts your bookings, loyalty program, or orders directly in their pocket — or a tool for your team that actually fits how you work.

Built around your existing tools
NOT SURE YET?

Let's figure it out together

Tell me about your business on a free 30-minute call. I'll tell you honestly what it would take, what it would cost, and whether an app is even the right move for you right now.

Let's talk
What you getCODE & ACCOUNTS: 100% YOURS
~ % paulbuilds new your-app
  • ✓
    UI/UX designFigma designs + clickable prototype
  • ✓
    Mobile or web appiOS, Android or browser, whatever fits your users
  • ✓
    Backend & databaseSecure API, auth, real-time data
  • ✓
    Web admin panelUpdate content, no code needed
  • ✓
    Payments & subscriptionsIn-app purchases + Stripe
  • ✓
    App Store & Google PlaySubmission, review, live launch
Process

From problem to working product
in four steps

No surprises, no scope creep, no mystery timelines. You always know what's done, what's next, and exactly what it costs. Every step approved before moving forward. Most projects launch in 6-12 weeks.

  1. 01 · UNDERSTAND

    Understand your business

    We talk about how your business works today, where time and money leak, and what a good outcome looks like. Then I turn it into a clear scope with features, timelines, and a fixed price.

    ✓ Feature scope
    ✓ Screen list
    ✓ Fixed-price quote
    [1–2 WEEKS]
  2. 02 · DESIGN

    Clickable designs

    I design the key screens in Figma before writing code. You see exactly what you're getting, and changing your mind is cheap. No surprises later.

    ✓ Figma designs
    ✓ Interactive prototype
    ✓ Your approval to build
    [2–3 WEEKS]
  3. 03 · BUILD

    Weekly test builds

    I build your app, backend, and admin panel. Every week you get a new build on your phone to test. You see progress in your hands, not status reports.

    ✓ iOS + Android app
    ✓ Backend & admin panel
    ✓ Weekly test builds
    [4–8 WEEKS]
  4. 04 · LAUNCH

    Launch

    Live in the App Store, Google Play or on the web, then full handover of code, accounts and documentation. You own everything, no restrictions, no ongoing license fees.

    ✓ Store listings or web deploy
    ✓ Published and live
    ✓ Full code & account handover
    [~1 WEEK]
05 · AFTER LAUNCHOPTIONAL

Need updates, bug fixes, or new features after launch? I offer ongoing support on a monthly retainer or per-task basis — whatever fits your business best.

Let's talk
Paul, software developer, working on custom software at a desk in Warsaw
PAUL · WARSAW, POLAND
About

Hi, I'm Paul.

I'm a software developer based in Warsaw, Poland. For 5 years I built mobile and web apps for a UK tech company. Now I build custom software for business owners and creators who want a tool that fits how they work, not another generic subscription.

I start by understanding how your business works, not by writing code. Before I learned to code, I earned a master's degree in business psychology. That background shapes how I build software. I don't just ask "what should this button do?" — I ask "why would a user tap it?" User motivation, onboarding friction, and first-session retention matter as much as clean code. Your software needs to work and make people want to come back.

I work solo, on purpose. When you work with me, you talk directly to the person writing your code and designing your screens. No project managers translating your vision through three layers of hand-offs. No "the developer will look into that." When you have a question at 9pm, you message me — not a ticket system. That's the advantage of working with one focused developer instead of an agency.

BASED INWarsaw, Poland
EXPERIENCE5 years building commercial software
BACKGROUNDMSc in Business Psychology
WORKS WITHClients worldwide, in English and Polish