UI/UX Design · Mockups · Prototyping
See your product before you build it
The most expensive mistakes in software happen before the first line of code — building the wrong thing. Wireframes, high-fidelity mockups, and clickable prototypes let you test the idea, show investors, and brief developers with zero ambiguity.
Design is included in every build package, from €1,200. Standalone design engagements — wireframes, mockups, a clickable prototype — are quoted per project with a fixed price within 48 hours. See the packages.
What you get
A design engagement does not produce pictures, it produces a decision document. You see every screen, every state and every step of the flow before anyone starts coding — at the point where a change still costs an hour instead of a week.
- Wireframes — the skeleton of every screen and the flow between them, fast and cheap to iterate.
- High-fidelity mockups — pixel-level designs of your website or mobile app: colors, typography, real content, every state.
- Clickable prototypes — a version you can tap through on your phone and put in front of real users before spending on development.
- Developer-ready handoff — editable source files, exported images and icons, and a spec covering spacing, typography, colors and every component state, so a dev team implements it without guessing.
Why a developer-designer is different
Plenty of designers make beautiful screens that are painful or impossible to build as designed. Because I also write production code, every screen I design is buildable, performant, and honest about edge cases — loading states, errors, empty lists, long names, small phones. You won't discover in month three that the design needs to be redone.
- No design that dies in the build. What you approve is what gets built.
- Every state is drawn. Loading, errors, empty lists and text that runs too long belong in the design, not in the surprises at the end.
- Speed counts as a design decision. A screen that loads slowly on a phone is not a good screen, however well it sits on a laptop.
Perfect for
The common thread: a decision has to be made about something that does not exist yet, and a written description is too vague to decide on.
- Founders validating an app idea before they hire a development team or walk into an investment round.
- Businesses with a dated website that want to see the new one before they give it the green light.
- Teams short on design capacity that need a well-defined piece finished on a short deadline.
Practical matters, wherever you are
Hiring a designer in another country raises fair questions. Here are the answers before you have to ask.
- Invoicing in euros. An itemized invoice, with every line spelled out.
- GDPR from the first wireframe. Forms that ask only for what you genuinely need, a cookie notice only where one is actually required, and no third-party trackers you did not ask for.
- A first call in your time zone. The kickoff is a video call at a time that suits you; after that you follow the work through a prototype link you can open yourself, instead of waiting for a status email.
- Your working day, not only mine. I am on Western European Time, so European clients and I share a working day, and my afternoon covers the American East Coast morning.
- English as the working language. It is the language I write, document and meet in. The screens themselves are delivered in whichever language your customers actually use.
- The files are yours. Source files, exports and the spec transfer to you — no license, no lock-in, and nothing you have to buy again later to keep using what you paid for.
What it costs
Design is included in every build package. If you want the design on its own, it is priced per project: describe the screens you have in mind and you have a fixed price within 48 hours. Your first message gets a reply within 24 hours.
- Personal one-page site — from €1,200.
- Landing page — from €1,950.
- Business website with technical SEO — from €3,900.
- Web application — from €12,000.
- Design on its own — priced per project, fixed before work starts and never metered by the hour.
What you can judge me on
The proof is not a portfolio piece. Celina (celinaeda.ru) is a two-sided marketplace I founded, built and still run myself: orders, real-time tracking, KYC identity verification, 100+ prerendered pages indexed by Google and Yandex, and Docker with nginx on a VPS with automated deploys.
Purchases is the second one: a Java 17 and Spring Boot platform with token authentication and per-role access control, public on GitHub, so you can read the code before you hire me. Both systems are mine end to end — design, database, frontend, servers and deploys — and both are still running.