OUR SERVICES
We build production-grade React applications that perform under real-world load. Our team delivers maintainable component architecture, typed codebases with TypeScript, and optimized rendering pipelines that scale from MVP to millions of users.
Tell us what you are building - what exists today, what it has to do and when it has to be live. We come back with the questions we need answered and a scoped estimate instead of a range.
EXPERTISE
OUR APPROACH
Choose the cooperation format that best fits your business goals and development velocity.
Fast launch to test your idea and gather user feedback with minimal investment.
What's included
Timeline Typically 9-16 weeks
Complete cycle from initial strategy and design to final launch.
What's included
Timeline Typically 20-40 weeks
Scale your team with expert developers to accelerate development.
What's included
Timeline Flexible / Long-term
OUR PROCESS
We specialize in creating user-centered & innovative solutions. Delivering seamless digital experiences.
EXPERT INSIGHTS
React gives teams the flexibility and ecosystem depth to build fast, maintainable interfaces that scale with product growth.
Component-first model
Build isolated, composable UI pieces that are easy to test and reuse.
Massive ecosystem
Thousands of battle-tested libraries cover every UI pattern.
Flexible rendering
CSR, SSR, and SSG all supported - choose per route in Next.js.
Huge talent pool
More React developers available than any other frontend framework.
Opinionated structure
Convention over configuration keeps large enterprise teams aligned.
Full framework
HTTP, forms, routing, and DI bundled out of the box.
TypeScript-first
Strong typing baked in from day one.
Long-term Google support
Backed by Google with a predictable LTS release cycle.
EXPERT GUIDANCE
Learning Curve
Gentle - learn JSX and hooks, then add what you need.
Bundle Size
Small core; only ship what you import.
State Management
Context, Zustand, Redux, or Jotai - your choice.
Testing
Jest + React Testing Library, widely adopted.
SSR Support
Excellent via Next.js - production-proven at scale.
Best For
SPAs, SSR products, design-system-driven apps.
Learning Curve
Steep - decorators, modules, DI, and RxJS upfront.
Bundle Size
Larger baseline even for minimal apps.
State Management
NgRx or services; patterns are prescribed.
Testing
Jasmine + Karma built in; Cypress for E2E.
SSR Support
Angular Universal, less mature ecosystem.
Best For
Large enterprise portals with strict team conventions.
Feature
React
Angular
DELIVERABLES
Component Library
Reusable, tested React components with documented props and Storybook integration.
State Architecture
Scalable state management using Redux Toolkit, Zustand, or React Query depending on project needs.
TypeScript Migration
Full TypeScript integration with strict types, interfaces, and zero implicit any.
Performance Audit
React DevTools profiling, memoization, code splitting, and lazy loading for optimal render performance.
Testing Suite
Unit and integration tests with Jest and React Testing Library covering critical user flows.
CI/CD Pipeline
Automated build, lint, test, and deploy pipeline configured for your team workflow.
INDUSTRIES
We build powerful digital experiences across various sectors, ensuring your product meets unique market demands.
Data-driven commerce solutions that improve journeys, boost sales, and optimize operations.
Data-driven commerce solutions that improve journeys, increase sales, and optimize operations.
Reliable medical platforms that protect patient data, simplify workflows, and support clinical accuracy.
Product-driven platforms that enhance workflows, automate processes, and scale with your business.
CASE STUDIES
START YOUR PROJECT
Expert developers ready to deliver high-quality digital products.
INSIGHTS
Thirteen Ukrainian app development companies, each named with a link to its own site and described only from what that site claims. Alphabetical, no scores, no prices. Kultrix is one of the thirteen.
2026-08-26
What an app costs and how long it takes, in hours: a mobile base is 320-520 hours, all fifteen modules from 40-90 to 150-340 hours, and a plan built on 18 focused hours a week.
2026-08-24
How to choose a software development agency: what to ask, what to ask them to show, and how to compare two proposals by stripping the rates out and reading the hours.
2026-08-24
FAQ
React is the most widely adopted UI library, with a massive ecosystem, excellent tooling, and a component model that scales well from small apps to enterprise platforms. Its virtual DOM and one-way data flow make large codebases easier to reason about and maintain.
Yes - all new React projects at Kultrix are TypeScript-first. TypeScript catches bugs at compile time, improves IDE autocomplete, and makes refactoring much safer as your codebase grows.
If you need server-side rendering, static generation, or SEO, Next.js is the right choice. For pure client-side SPAs (dashboards, internal tools) without SEO requirements, plain React with Vite is simpler. We help you pick the right tool during scoping.
Yes. We regularly modernize legacy React codebases - converting class components to functional components with hooks, upgrading state management from Redux to Redux Toolkit or Zustand, and adopting modern patterns throughout.
It depends on the data. Server state (API data) is best managed with React Query or SWR. Global UI state works well with Zustand or Redux Toolkit. Local component state stays in useState and useReducer. We avoid over-engineering state management.
Yes. We write unit tests with Jest and integration tests with React Testing Library. We focus on testing user behavior rather than implementation details, which makes tests resilient to refactoring.
We profile with React DevTools Profiler, apply memoization (useMemo, useCallback, React.memo) where benchmarks justify it, implement route-based code splitting, optimize bundle size with tree shaking, and set up performance monitoring with Core Web Vitals tracking.
Absolutely. We regularly audit and extend existing React projects. We start with a code review, identify the highest-impact issues, and propose a prioritized improvement plan before writing a line of new code.
Yes. We build Storybook-driven component libraries with design tokens, accessible components, and documentation. This gives product teams a shared language between design and development.
We use React Hook Form for complex forms - it is performant, uncontrolled by default, and integrates cleanly with Zod for schema validation. For simple cases, controlled components with useState are sufficient.
For marketing pages and blogs, static generation (SSG) wins on performance and cost. For dashboards and authenticated apps, client-side rendering (CSR) avoids unnecessary server complexity. Next.js App Router lets us mix both per-route, which is usually the right answer.
A focused React frontend for an existing API typically takes 6-10 weeks. A full-stack React application with backend takes 3-5 months. Kultrix provides a detailed timeline with milestones after the discovery session.
