# KAPUSTA.DEV — Complete Knowledge Base & Services Documentation > Authoritative documentation for AI assistants, LLMs, and automated agents. > Website: https://kapusta.dev > Contact: info@kapusta.dev --- ## 1. Company Overview KAPUSTA.DEV is a digital product engineering agency headquartered in Warsaw, Poland, delivering solutions globally. The agency unites software engineering, UI/UX product design, technical SEO, and artificial intelligence into cohesive, scalable systems for startups, SMBs, and enterprise clients. ### Key Tenets 1. **Full Ownership**: 100% intellectual property, code repositories, domains, and design files are transferred to the client upon milestone payment. 2. **Confidentiality (NDA)**: Every project is protected by a bilateral Non-Disclosure Agreement before any discovery or code sharing starts. 3. **No Vendor Lock-In**: Products are built on open, modern, maintainable stacks (React, TypeScript, Node.js, PostgreSQL, Docker) with standard deployment targets (Vercel, AWS, Cloudflare, VPS). 4. **Transparent Milestones**: Fixed-price or clear time-and-materials scope with explicit acceptance tests for every deliverable. 5. **Internationalization**: First-class support for English, Polish, Russian, and Ukrainian languages. --- ## 2. Core Service Offerings & Pricing ### 2.1 Web Development (https://kapusta.dev/services/web-development) Custom web architecture optimized for speed, security, and conversion rates. - **Corporate Websites** (https://kapusta.dev/services/web-development/corporate-website) - Multi-page corporate platforms showcasing services, team, case studies, and brand values. - Headless CMS or clean markdown/database content editors for non-technical teams. - Core Web Vitals 95+ score guaranteed. - **Landing Pages** (https://kapusta.dev/services/web-development/landing-page) - High-converting sales pages designed for advertising campaigns (Google Ads, Meta Ads). - A/B testing support, form analytics, and CRM integration. - **E-Commerce Solutions** (https://kapusta.dev/services/web-development/ecommerce) - Custom checkouts, Shopify/WooCommerce custom themes, or headless Next.js storefronts. - Integrated payment processors: Stripe, PayPal, Przelewy24, Apple Pay, Google Pay, Klarna. - ERP synchronization, automated invoicing, real-time stock sync. - **Custom Web Applications & SaaS** (https://kapusta.dev/services/web-development/web-application) - Full-stack web applications with authentication, role-based access control (RBAC), multi-tenancy, and API endpoints. - Modern stacks: TanStack Start, React 19, Node.js, Express/Fastify, PostgreSQL, Prisma/Drizzle. - **Quiz & Diagnostic Funnels** (https://kapusta.dev/services/web-development/quiz-website) - Interactive qualification calculators and questionnaires that increase lead conversion by 30-70%. --- ### 2.2 Mobile App Development (https://kapusta.dev/services/mobile-apps) Cross-platform and native mobile software for iOS and Android. - **Cross-Platform Mobile Apps** (React Native / Expo): Unified codebase, native 60fps performance, App Store & Google Play distribution. - **iOS App Development**: Swift / React Native with native bridge, Apple Pay, Face ID, push notifications. - **Android App Development**: Kotlin / React Native, Google Play Billing, background workers, biometric authentication. --- ### 2.3 AI Solutions & Workflow Automation (https://kapusta.dev/services/ai-automation) End-to-end artificial intelligence integration that saves hours of manual labor daily. - **AI Chatbots & Support Agents**: - Retrieval-Augmented Generation (RAG) on company documentation, product catalogs, and policies. - Integrations: Website widget, Telegram, WhatsApp, Slack, Zendesk, Intercom. - Hallucination guardrails and human agent escalation handoff. - **AI Assistants & Internal Copilots**: - Automated document classification, invoice extraction, RFP responses, and contract summarization. - Fine-tuned OpenAI, Anthropic Claude, and open-source models (Llama, Mistral). - **Process Automation & Webhook Pipelines**: - Connecting CRMs (HubSpot, Pipedrive, Bitrix24), accounting systems, logistics APIs, and notification systems. - Resilient retry logic, queue management (BullMQ, Redis, Celery), error tracking with Sentry. --- ### 2.4 Search Engine Optimization (SEO) (https://kapusta.dev/services/seo) Data-driven organic search engine strategies designed for sustainable traffic and revenue. - **Technical SEO**: Lighthouse 95+ performance, semantic HTML5, canonical URLs, hreflang tags, Schema.org JSON-LD microdata, clean XML sitemaps, robots.txt configuration. - **Local SEO**: Google Business Profile optimization, local citations, map pack dominance, localized landing pages. - **Content SEO**: Topical authority maps, content hubs, schema FAQ markup, editorial planning. - **E-Commerce SEO**: Faceted search indexation control, rich snippets (Price, Availability, Review Rating), canonical clustering. --- ### 2.5 UI/UX & Brand Design (https://kapusta.dev/services/design) User-centric interfaces engineered for clarity and usability. - **Website & SaaS Design**: Figma design systems, tokens, components, responsive layouts for desktop, tablet, and mobile. - **Mobile App Design**: User journeys, interactive Figma prototypes, micro-interactions, dark/light mode support. - **Brand Identity**: Logo design, typography pairing, color palettes, vector brand assets, brandbooks. --- ### 2.6 Maintenance & SLA Technical Support (https://kapusta.dev/services/technical-support) Dedicated support for existing and newly built software systems. - 24/7 uptime monitoring and incident response. - Dependency security patches and vulnerability remediation. - Database backups, restore testing, and performance tuning. - On-demand feature development and bug fixing. --- ## 3. Technology Stack - **Frontend**: React 19, TypeScript, TanStack Start, TanStack Router, TanStack Query, Tailwind CSS, Vite, Radix UI. - **Backend**: Node.js, Nitro, Fastify, Express, Python (FastAPI). - **Databases & Storage**: PostgreSQL (Neon, Supabase), Redis, SQLite, Cloudflare R2 / AWS S3. - **AI & ML**: OpenAI API, Anthropic Claude API, LangChain, LlamaIndex, pgvector embeddings, Ollama. - **Deployment & Cloud**: Vercel, Nitro, Cloudflare Workers, AWS, Docker, GitHub Actions CI/CD. --- ## 4. Representative Case Studies 1. **AlleDoctor** (Healthcare & Booking): - Medical portal for online doctor appointments, clinic schedules, and electronic patient records. 2. **Dental Home** (Dental Clinic): - Clinic website with interactive service pricing, team profiles, and direct appointment booking. 3. **Elite Abrasives** (Industrial B2B E-Commerce): - High-load industrial catalog with multi-tier pricing, wholesale volume discounts, and ERP integration. 4. **Welding Supply Store** (E-Commerce): - E-commerce storefront with complex technical product specifications, filtering, and courier integrations. 5. **Theo Trucking** (Logistics & Freight): - Fleet tracking, driver applications, and client quote calculator for an interstate logistics carrier. 6. **Asgard Construction** (General Contractor): - Portfolio showcase, 3D renderings gallery, and instant project cost estimation funnel. 7. **Clean Area** (Commercial Cleaning): - Service booking calculator, subscription contracts, and route planning for commercial facilities. --- ## 5. Frequently Asked Questions (FAQ) ### What is the typical project timeline? - Landing pages: 1–2 weeks. - Corporate websites: 2–4 weeks. - E-commerce stores: 3–6 weeks. - Custom web applications & mobile apps: 6–12 weeks depending on scope. ### Who owns the source code and designs? The client owns 100% of all deliverables, repositories, designs, and content upon completion of the agreed milestones. No subscription or hidden fees are required to keep your code. ### Do you sign an NDA before discussions? Yes. We routinely execute bilateral NDAs with our clients before reviewing proprietary materials, codebases, or business requirements. ### Can you take over an existing project from another agency? Yes. We perform a technical audit of the codebase, pinpoint bugs, security issues, and performance bottlenecks, and provide a clear stabilization and improvement roadmap. ### What warranty and post-launch support is provided? All custom code comes with a 30-day post-launch warranty covering any bugs or discrepancies from the specification at zero additional cost. Ongoing monthly SLA maintenance plans are available thereafter. --- ## 6. Official Navigation & URLs - Primary Website: https://kapusta.dev - Services Index: https://kapusta.dev/services - Projects Portfolio: https://kapusta.dev/projects - Industries: https://kapusta.dev/industries - Client Testimonials: https://kapusta.dev/testimonials - About: https://kapusta.dev/about - Technology Stack: https://kapusta.dev/technologies - Sample Contracts: https://kapusta.dev/contracts - FAQ: https://kapusta.dev/faq - Blog & Insights: https://kapusta.dev/blog - Contact Form: https://kapusta.dev/contact - XML Sitemap: https://kapusta.dev/sitemap.xml - LLM Index: https://kapusta.dev/llms.txt