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🇨🇿 Based in Prague, Czech Republic

We Build the Web.
Fast. Clean. Precise.

SEMLIN s.r.o. is a Prague IT company delivering high-performance websites, custom apps, AI integrations, and crypto solutions — no bloat, no WordPress, just optimal code.

React / Next.js Node.js Python AI / LLM Web3 / Crypto PostgreSQL Docker
50+
Projects Delivered
30+
Happy Clients
5+
Years of Experience
99%
Client Satisfaction
What We Do

Full-Stack Expertise. End-to-End.

From pixel-perfect frontends to powerful backends, AI systems, and crypto infrastructure — we cover the full stack.

⚡

Frontend Development

Blazing-fast, responsive interfaces built with React, Next.js, or vanilla JS. Every pixel intentional, every millisecond counts.

Learn more →
🔨

Backend Development

Robust APIs, microservices, and server infrastructure. Node.js, Python, Go — built to scale and built to last.

Learn more →
🤖

AI Integration

Integrate LLMs, vector search, AI agents, and automation into your product. We speak GPT-4, Claude, and open-source.

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Why SEMLIN

No Bloat. No Nonsense. Just Results.

🚀

Performance by Default

We write minimal, optimized code. No heavy frameworks or page builders. Your site loads in under a second.

🎨

Design That Converts

Beautiful isn’t enough — your site must work. We design for clarity, trust, and action at every touchpoint.

🔒

Security & Reliability

Every project is built with security best practices baked in — SSL, OWASP standards, and secure deployment pipelines.

🔒

Full Ownership — No Lock-In

You own every line of code. No platform fees, no surprise dependencies. Switch hosts or teams anytime.

Ready to Build Something Great?

A fully custom website starts at just €799. No templates, no WordPress — pure, clean code built for your brand.

What We Offer

Our Services

Six core competencies. One team. Everything you need to take your digital product from idea to live.

⚡

Frontend Development

We craft interfaces that are fast, accessible, and beautiful. React, Next.js, Vue, or plain HTML/CSS/JS — whatever best fits your project. Core Web Vitals are a priority, not an afterthought.

🔨

Backend Development

Scalable REST and GraphQL APIs, database design, authentication systems, and cloud infrastructure. Node.js, Python, Go, PostgreSQL, MongoDB — chosen for the job, not the trend.

📱

App Development

Cross-platform mobile and desktop applications using React Native and Electron. Ship once to iOS, Android, and desktop without sacrificing native performance or feel.

🤖

AI Integration

Build AI-powered features into your product: chatbots, semantic search, document processing, recommendation engines, and custom LLM workflows with GPT-4, Claude, Llama, or your own model.

🔗

Crypto Integration

Smart contracts, wallet connectivity (MetaMask, WalletConnect), token gating, NFT minting, DeFi interfaces, and multi-chain support. We work with Ethereum, Solana, and EVM-compatible chains.

💡

IT Consulting

From architecture reviews to technology audits, vendor selection, team scaling, and digital transformation strategy — clear, actionable advice without the agency fluff.

Technologies We Work With

ReactNext.jsVue.jsTypeScript Node.jsPythonGoPostgreSQL MongoDBRedisGraphQLDocker KubernetesAWSVercelOpenAI API LangChainPineconeEthereumSolana HardhatReact NativeElectronFigma

Not Sure What You Need?

Let's have a 30-minute call. We'll help you figure out the right approach — for free, no strings attached.

Our Work

Portfolio

A selection of projects we're proud of. From startups to enterprise — every one built clean.

Global Capital
WebFintechInvestment

Global Capital

UK-registered investment platform offering diversified products across fixed-income, precious metals, commodities, and digital assets. Clean, trust-driven design built for a regulated financial environment.

Unique Trips Rio
WebTravelProperty

Unique Trips Rio

Bilingual property management platform for Airbnb rentals in Rio de Janeiro. Serves both property owners and travellers with a clean, conversion-focused design.

United Investment s.r.o.
WebBusinessCzech

United Investment s.r.o.

Corporate website for a Czech multi-service company established in 1997. Covers real estate, luxury automobiles, events, and e-commerce — delivered with a premium, trust-focused design.

Učetní Anděl
WebFinanceCzech

Učetní Anděl

Czech accounting firm specialising in bookkeeping, tax advisory, and payroll. Soft-gradient design built to communicate professionalism and approachability to small and mid-size businesses.

A Man's World Barber
WebLifestylePrague

A Man's World

Luxury barbershop website for a premium men's grooming studio in Prague 1. Dark gold aesthetic, bilingual CZ/EN, with online booking and a loyalty programme.

Tanya's Website
WebNutritionBilingual

Tanya's Website

Nutrition specialist website for Tanya, offering individualized health guidance and consultations in Russian and English. Clean design with booking functionality.

BTCPKR
WebCryptoAffiliate

BTCPKR

Definitive guide to Bitcoin poker rooms — handpicked for low rake, fast payouts, and zero KYC. Sleek single-page design built for conversion and trust in the crypto gambling space.

FearPorn
WebMediaContent

FearPorn

Bold media and commentary platform delivering news and culture through a sharp, unapologetic lens. Fast-loading, minimal design that keeps the focus squarely on the content.

Cook Easy
WebAIFood

Cook Easy

AI-powered recipe generator — type in the ingredients you already have at home, set your time and servings, and get a practical tailored recipe in seconds. Clean, distraction-free UI.

Have a project in mind? Let's build it together.

Transparent Pricing

Pricing

No hidden fees, no surprise invoices. What you see is what you pay.

Web Essentials

Perfect for businesses that need a fast, professional online presence.

€799
One-time project fee
  • ✓5–6 custom-designed pages
  • ✓Responsive across all devices
  • ✓Performance-optimized code
  • ✓Contact form integration
  • ✓SEO-ready structure
  • ✓Hosting setup & SSL
  • –Database / backend logic
  • –User authentication
Most Popular

Web Pro

For products that need real backend power, user accounts, and integrations.

€2,499
One-time project fee
  • ✓Everything in Web Essentials
  • ✓Custom database & backend API
  • ✓User registration & auth
  • ✓CMS / admin dashboard
  • ✓Third-party integrations (Stripe, etc.)
  • ✓Premium hosting (1 year included)
  • ✓3 months post-launch support
  • ✓Performance & security audit

Enterprise

Full product development — apps, AI, crypto, dedicated team, ongoing collaboration.

Let's Talk
Custom quote based on scope
  • ✓Everything in Web Pro
  • ✓Mobile / desktop app development
  • ✓AI & LLM feature integration
  • ✓Blockchain / crypto integration
  • ✓Dedicated development team
  • ✓Architecture & tech consulting
  • ✓SLA & priority support
  • ✓Ongoing development retainer
Monthly Plans

Hosting & Maintenance

Optional monthly plans to keep your site fast, secure, and up to date.

Basic Maintenance

€49/mo

Updates, security patches, uptime monitoring, and monthly performance report.

Full Package

€99/mo

Everything in Basic + premium hosting, backups, content updates (2h/mo), and priority support.

Frequently Asked Questions

The €799 package includes a fully custom-designed 5–6 page website, responsive design, performance-optimized code, contact form, SEO-ready markup, and hosting setup with SSL. No templates — everything is built from scratch for your brand.
A Web Essentials site typically takes 2–3 weeks from brief to launch. Web Pro projects are 4–8 weeks depending on complexity. Enterprise timelines are scoped during the discovery phase.
No. We write custom code for every project. No WordPress, no Wix, no bloated page builders. This means faster sites, better security, and code you fully own with no platform lock-in.
You do. 100%. Once the project is delivered and paid for, all code, assets, and IP transfer to you. No licensing fees, no platform subscriptions — it's yours.
Yes. For most projects we split into 50% upfront and 50% on delivery. For larger enterprise projects, milestone-based payment plans can be arranged.
Our Story

About SEMLIN

A focused team based in Prague building things that matter — fast, clean, and built to last.

Who We Are

Built in Prague. Trusted Globally.

SEMLIN s.r.o. was founded on a simple frustration: most web agencies deliver slow, bloated sites built on platforms that create more problems than they solve. We decided to do it differently.

We write minimal, optimized code by hand. No WordPress, no page builders, no unnecessary dependencies. Every project starts from a blank canvas and is built precisely for its purpose.

Based in Prague — the heart of Central European tech — we work with clients across Europe and beyond, from early-stage startups to established enterprises navigating digital transformation.

SEMLIN Prague
What Drives Us

Our Values

⚡

Performance First

Speed is not a feature — it's a foundation. Every line of code we write is with performance in mind. We measure, optimize, and deliver.

🎯

Radical Clarity

No jargon. No vague timelines. We communicate plainly, set real expectations, and deliver exactly what we promise.

🔑

Client Ownership

Your code, your data, your IP. We build for you — not for a platform subscription. Walk away with everything, lock-in free.

The People

Our Team

Small on headcount, big on output. Every team member is senior-level and hands-on.

Ivan

Ivan — Founder & Lead Developer

Full-stack architect with 10+ years across web, mobile, and cloud. Previously built products for fintech and enterprise clients across Europe.

Team member

Team Member — UI/UX & Frontend

Designer-developer hybrid specialising in performant interfaces and conversion-driven design systems.

Team member

Team Member — AI & Backend

Backend specialist and AI integration engineer. Builds LLM pipelines, vector databases, and scalable server infrastructure.

Get in Touch

Let's Build Something

Tell us about your project. We'll get back to you within 24 hours.

Start a Project

Fill in the details below and we'll prepare a tailored proposal for you.

✅

Message Received!

Thanks for reaching out. We'll review your project and get back to you within 24 hours.

Contact Details

📍
OfficePrague, Czech Republic
SEMLIN s.r.o.
✉️
Emailinfo@semlin.eu
📞
Phone+420 XXX XXX XXX
🕐
Response TimeWithin 24 hours, Mon–Fri
Prague map