DEVELOPMENT
DESIGN
PRODUCT
Sergei Serafimovich
20+ years
Designing, building, and leading digital products end-to-end.
Product-first
Balancing user value, business outcomes, and technical reality.
Cross-domain
Fintech, e-commerce, SaaS, AI, marketplaces, and internal platforms.

Services

High-quality product design, engineering, and strategic leadership. Delivered with precision and shaped around your goals.

  • Design & Experience

    Design & Experience

    I create digital experiences that are simple, refined, and easy to use — from first sketches to polished visuals.

    • UX structure and meaningful user flows
    • Interfaces with clarity, consistency, and taste
    • High-impact marketing pages and visual systems
  • Engineering & Architecture

    Engineering & Architecture

    I build reliable systems and visually rich interfaces with clean, thoughtful engineering.

    • Complex frontends and smooth interactions
    • Robust, high-performance backends and APIs
    • Scalable architecture designed for long-term growth
  • Product Leadership

    Product Leadership

    I help teams focus, make better decisions, and ship with confidence — without the usual noise.

    • Clear product direction and practical prioritization
    • Lightweight processes that actually help the team
    • Hands-on guidance from idea to launch

Portfolio

Draw your own sweater card and share it with your friends.

  • UX/UI
  • Concept
  • Development
Sweater Editor

Do you love Christmas? We do!

And we also love to create cool stuff. So we put those two together and created this sweater image editor. You draw it stitch by stitch and eventually create something beautiful. It's kind of like a pixel art, but with a Christmas theme.

Sweater Editor

How did we do it?

The idea came to us during the Christmas holiday season. We noticed numerous promotions that used sweater patterns, and it struck us, "Hey! This looks a lot like pixel art." So we decided to create an editor that would allow to create images like this. It uses a small canvas to draw pixels and then uses it as a map for placing "stitches" with colors corresponding to individual pixels.

Sweater Editor

Try it yourself!

Go To Editor →
OctoSale

Sales platform designed to help representatives work faster, stay organized, and close more deals.

  • UX/UI
  • Architecture
  • Backend
  • Frontend
  • MVP Development
  • Branding
OctoSale

Everything about a client. Right where you need it.

Key financial indicators, purchase dynamics, and quick actions live in one place, reducing friction during on-site visits.

A smart client list that adapts to context.

The system highlights clients who need attention — upcoming issues, missed orders, or nearby opportunities.

Clients are prioritized based on urgency and current context. Status tags reveal risk and opportunities.
Most apps ignore empty state screens. We don’t. It's designed to be inspiring, clear and not feel like an afterthought.

Forms that are usable even on mobile screens.

Forms are split into small focused steps so completing them feels simple even on a small mobile screen. Each section lives on its own screen, making the process clear and easy to follow.

Fast order creation with zero noise.

The ordering flow is designed for speed, helping reps create or repeat orders quickly in real working conditions. Everything important is always visible, and searching through large catalogs stays effortless.

Products are easy to find even in large catalogs.
Real-time order statuses are always within reach so reps stay on top of every stage without waiting or guessing.

Clear, lightweight analytics for quick decisions.

Analytics give a quick and clear snapshot of performance for executives. Revenue, expenses, trends and client structure are shown in a clean and actionable way.

Orders processing is so much easier now. And seeing realtime stock levels, order statuses and client information is a game changer. The app shows you the right information at the right time.”

Eugene
Sales Manager
Soon
We are working on adding more projects to our portfolio.
Stay tuned! 😉

Get in touch

Have a project in mind? Let's talk! We'll discuss your vision, and you'll walk away with valuable insights, whether we decide to work together or not.

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