01
Frontend development
Interfaces and design systems in React and TypeScript.
Frontend developmentReact development
The technology behind most interfaces we build: from filters and forms on fast websites to full dashboards, client portals and SaaS. Interfaces that respond instantly and are easy to grow.
Faster launch
thousands of ready solutions, less building from scratch
For years ahead
the most widespread web technology
Grows with you
new features are added without rewrites
Proven
Facebook and Instagram run on it
What is React JS?
React is a free, open-source JavaScript library from Meta for building user interfaces out of components. Each block of the page has its own logic, and frameworks like Next.js grow it into full applications. Synapse Team is a React development company: interfaces, interactive website elements and complete products.
What we build with React
Pick the service that matches your project, or start the brief and we route it for you.
02
SaaS products
Products with accounts, payments and live data.
SaaS products03
Custom software
Dashboards, portals and internal tools with complex logic.
Custom software04
MVP development
A working product in weeks to test the market.
MVP development05
Storefront UIs
Carts, filters and checkout that respond instantly.
Storefront UIs06
Websites
Fast websites with React only where interactivity is needed.
WebsitesWhen we choose React
React is worth it when the interface has real logic: forms, filters, live data, drag and drop. Components keep that complexity under control, and the ecosystem has a proven solution for almost any task.
- Dashboards, SaaS and client portals with lots of interaction
- Design systems: one component library across the product
- Interactive elements on Astro sites: only where they are needed
- Next.js when the product must be fast and visible in Google
When we recommend something else
Not every project needs React. Here is when we honestly recommend another option, and build it ourselves.
- Content pages without interaction: plain HTML loads faster
- A marketing site or blog: Astro is faster
- Your team is used to the WordPress admin: classic WordPress
- A native mobile app: React Native, a separate project with its own estimate
Technologies we build with
AI-fast or classic: you choose the pace
AI speeds up development, engineers guarantee quality: a senior engineer reviews every component and test before release. Prefer a traditional process? We run that too, with the same quality bar.
Option A
Classic build
Traditional cycle with the same team and quality gates.
SaaS MVP on React
from $10,000 · 10–12 weeks
Option Bup to 2× faster
AI-powered build
Fastest path to launch. AI speeds up the work, engineers verify every line.
SaaS MVP on React
from $4,000 · 4–6 weeks
Pricing and timelines
Landing pagefrom $1,0003–5 days
Corporate websitefrom $2,0001–2 weeks
Store with up to 50 productsfrom $3,0003–4 weeks
AI chatbot or automationfrom $2,0001–3 weeks
Draft ranges. Final numbers arrive after a short brief: tell us about the project in the chat and the team sends a precise estimate within one business day. Updated: October 2026
Full pricingOur works
Real projects with measurable results: stores, platforms and AI products we ship end to end.
dealfin.cz
E-commerce - DealFinE-commerce - DealFin
Full cycle on WooCommerce: prices follow the gold rate, an exchange section, 4 languages, integrations and support to this day.
digitallicense.shop
E-commerce - Digital LicenseE-commerce - Digital License
A high-traffic store built from scratch: hundreds of products, 10 languages, 6 currencies and automatic license delivery.
upwex.io
AI tool - UpwexAI tool - Upwex
Our own SaaS from idea to paying users: AI rates Upwork jobs, prepares proposals in the freelancer's voice and submits them 24/7.
How we work
01
Brief
A short chat about goals, scope and deadlines.
02
Estimate
Fixed price and timeline within one business day.
03
Design
Screen structure and a set of interface components.
04
Build
Interface, logic and integrations with weekly demos.
05
Launch
Go-live, monitoring, analytics and project handover.
Reviews
What clients say
Frequently asked questions
Is React a framework or a library?
React itself is a library: it builds the interface. Pages, data and server rendering come from frameworks built on top, most often Next.js. In practice we choose per project: React alone for interactive elements of a website, Next.js for full applications.
How much does React development cost?
The library does not change our pricing:
- SaaS MVP on React: AI from $4,000 (4–6 weeks), classic from $10,000 (10–12 weeks).
- Internal tool on React: AI from $4,000 (3–6 weeks), classic from $6,500 (6–10 weeks).
Describe your project in the chat and the team sends a precise fixed-price estimate within one business day.
Is React frontend or backend?
React is a frontend library: it runs the interface. The backend comes from Node.js, Next.js server code or a CMS like Payload. On our own site, for example, React powers the admin panel, while the public pages are plain HTML.
Does a regular website need React?
Not always, and we say so before the work starts. If a page is mostly content, plain HTML is faster: our own site serves its pages that way and keeps React for the admin panel. React is worth it when the interface has real logic.
React or React Native: what is the difference?
React builds web interfaces that run in the browser. React Native uses the same approach to build native mobile apps. We work with React on the web. We estimate a mobile app separately and say so honestly during the brief.
Contact us
Tell us about your project
I run a business, but I get no clients or leads from the internet. What should I do?
Depends on the goal. Pick what sounds closest and I will suggest a solution with a ballpark estimate:
- I need a website
- I want to sell online
- My site brings no clients
- I want AI in my business
- I have a product idea
Thinking…Stop
AI estimate
Start the brief in our chat: a few short questions, and the team sends a precise estimate within one business day.