Full-cycle digital products

We design digital products that work.

From the first sketch to release and beyond. Design, mobile and web apps, branding and MVP — built by one team that owns the outcome.

Trusted by teams that build products seriously

Northwind Kyivstar Labs Monobank⁺ Sifted Orbital Fintech Guild
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What we do

Full cycle — from idea to a product in the user’s hands

One team covers design, development and support. No handoffs between contractors — nothing lost in translation between stages.

01

UX/UI Design

Research, prototypes, design systems and interfaces that hand off cleanly to development and scale for years.

ResearchWireframesDesign SystemPrototyping
02

Mobile Apps

Native and cross-platform apps for iOS and Android — fast, stable and store-ready.

iOSAndroidReact NativeFlutter
03

Web Applications

Complex web products and dashboards with clean architecture and predictable performance.

ReactNext.jsNodeTypeScript
04

Corporate Websites

Brand sites that load instantly, rank in search and convey the brand’s character precisely.

SEOCMSCore Web Vitals
05

E-commerce

Online stores built for conversion: a clear path to purchase and a fast checkout.

ShopifyHeadlessPayments
06

Branding

Identity that works equally well on a business card and in an app — driven by logic, not just aesthetics.

LogoIdentityGuidelines
How we work

Eight steps from brief to support

01

Discovery

We dive into the business, goals and constraints. We shape a shared product vision.

02

Research

We analyse the market, competitors and users. Hypotheses instead of guesses.

03

Wireframes

We design logic and flows before pixels. Cheap to test ideas.

04

UI Design

We craft the visual layer and build a design system to scale.

05

Development

We write clean code with weekly demos. You see progress constantly.

06

Testing

QA, load, edge cases. A release with no surprises in production.

07

Launch

We prepare the infrastructure and go live. A smooth path to production.

08

Support

We grow the product after release: metrics, iterations, new features.

Selected work

Products people use every day

A few cases where design and development delivered measurable results. Full portfolio on request.

Why ST.K

Why clients stay with us for the long run

Not a one-project studio, but a partner who guides the product for years — accountable for outcomes, not hours.

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Years, not months

Nine years building products and running them after release. Experience you can’t buy in a single sprint.

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One team

Design and code under one roof. Nothing lost between contractors.

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Projects

From MVPs to mature products.

A transparent process

Weekly demos, clear deadlines, access to the task board. You always see where the product is heading — no black boxes, no surprises at the end.

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Come back

Clients return with their next product.

Testimonials

What people who worked with us say

ST.K built our app faster than we’d planned just for the design. A rare case where a contractor thinks about the product, not the hours.
Iryna Koval
Product Lead, Northwind
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FAQ

Frequently asked questions

Didn’t find your answer? Drop us a line — we reply within a day.

It depends on scope and complexity. A landing page starts in one range, a full application in another. After Discovery we give a precise estimate broken down by stage, so you see exactly what you pay for.

An MVP usually takes 6–10 weeks; a mature product, three months or more. Exact timelines are locked in after Discovery, once the scope is clear. You get a plan with weekly demos.

Full cycle: research, design, development, testing, release and support. One team drives the product from idea to production — no handoffs between contractors.

We don’t disappear after release. We track metrics, fix bugs and build new features. Most clients stay with us for support and their next products.

Yes. We often start with Product Discovery or a prototype — an inexpensive way to validate the idea before major investment. From there we move in stages you control.

Got an idea? Let’s make it a product.

Tell us about the task — we’ll come back with a plan and an estimate within a day. No strings attached.

or email us directly: staskozumic@gmail.com