01
Full-Stack Applications
Complete web applications from backend to frontend. SPA, SSR, real-time with WebSocket/SSE. CQRS, Event-Driven, i18n.
12+ Vue.js projectsNuxt 2/3/4 + Next.js
Elevate Your Business with Our Code
Full-stack developer passionate about building modern web applications
Tech Stack
TypeScript
JavaScript
PHP
Python
Vue.js
React
Nuxt.js
Next.js
Tailwind
shadcn/ui
Node.js
NestJS
Laravel
Symfony
PostgreSQL
MySQL
Redis
Docker
Kubernetes
AWS
Helm
CI/CD
WebSockets
gRPC
OpenAI API
Claude API
Hi, I'm
Przemysław Szejna
Full Stack Developer
I build web applications, business systems, and AI solutions. Specializing in Node.js, Vue.js, and TypeScript.
Available for work
10+ years experience
50+ projects
∞ coffee
Tech Stack
Skills
Technologies and tools I work with daily
Frontend
Modern user interfaces
Vue.js 2/3 12+ React 18/19 TypeScript TailwindCSS Material UI shadcn/ui Nuxt 2/3/4 Next.js Electron TipTap Leaflet
Backend
Scalable APIs and services
NestJS 10+ Laravel Symfony Node.js PHP gRPC BullMQ AWS SQS REST API GraphQL
Databases
Efficient data structures and ORM
PostgreSQL MySQL Redis TypeORM Doctrine ORM Eloquent Meilisearch
AI / LLM
Integrating AI models with applications
OpenAI API Anthropic Claude Azure OpenAI Mistral AI AI SDK (Vercel) OCR
DevOps / Cloud
Infrastructure and automation
Docker Kubernetes (K3s) Helm Charts ArgoCD Ansible AWS Azure CI/CD Sentry MinIO
Architectural Patterns
Enterprise system architecture
CQRS Event-Driven DDD Microservices Strategy Pattern Factory Pattern Repository Pattern Multi-tenancy
Real-time
Real-time communication
WebSocket Socket.io SSE Redis Pub/Sub BullMQ RabbitMQ
Testing
Automated testing and code quality
Jest Playwright Cypress PHPUnit E2E Testing Mocha
Integrations
Payments, OAuth, documents and more
Przelewy24 SaferPay Elavon Stripe OAuth PDF Excel Web scraping i18n
Specializations
Comprehensive development services for your business
02
CRM & Business Systems
Custom CRM systems, admin panels and business applications tailored to your company processes. Accounting integrations, payment gateways, reports.
43 DDD packages105+ backend modules
03
AI & Document Processing
Multi-provider LLM integration (OpenAI, Claude, Azure, Mistral). RAG with pgvector. Multi-provider OCR. Structured outputs with Zod.
130+ AI queue handlersMulti-provider LLM
04
Vue.js, React & Next.js
Applications in Vue.js 2/3, Nuxt 2/3/4, React 18/19, Next.js 13-15. TailwindCSS, shadcn/ui, MUI, Zustand, Pinia, Sentry.
12+ Vue.js projectsSentry + GA + Hotjar
05
DevOps & Cloud
Containerization, orchestration and deployment automation. Kubernetes, Helm, ArgoCD, Ansible, AWS, Serverless.
6 Helm charts (Voyeta)GitOps workflow
06
CMS, Automation & IoT
WordPress sites, CLI tools, web scraping, physical device integrations (card readers, tokenization).
Centreo card readersPublishable npm packages
Architecture
Proven patterns in enterprise-grade systems
CQRS
1103+ files
Command Query Responsibility Segregation with @nestjs/cqrs
Strategy 68+
Factory 23+
Event-Driven
119+ listeners
Event-driven architecture with EventEmitter and queues
BullMQ 130+ handlers
SQS 130+ handlers
DDD
43 domain packages
Domain-Driven Design with full domain separation
Repository 520+
Value Objects PHP 8.1 enums
Microservices
19+ services
Microservice architecture with gRPC and queues
gRPC 12 proto
Multi-tenancy 3+ projects
Featured Work
Some of the projects I've worked on recently
CargoNest Logistics platform with AI 105+ modules
MERA DDD ticketing system 43 packages
Recode Software Own projects 12+ projects
RST Client projects 4 projects
Latest project
Tripse Travel
Nuxt 4Vue 3TypeScriptNestJS
View project 
10+ years
40+ projects
4 languages
19+ microservices
105+ modules
43 DDD packages