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Full-stack developer passionate about building modern web applications

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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

11+ years experience

50+ projects

∞ coffee

Tech Stack

TypeScriptJavaScriptNode.jsNest.jsVue.jsReactNuxt.jsAstroPostgreSQLMongoDBRedisDockerAWSGraphQLTailwind

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

Full-Stack Applications

Complete web applications from backend to frontend. SPA, SSR, real-time with WebSocket/SSE. CQRS, Event-Driven, i18n.

Vue / Nuxt / ReactNestJS / Laravel / SymfonyPostgreSQL / RedisWebSocket / SSE

12+ Vue.js projectsNuxt 2/3/4 + Next.js

CRM & Business Systems

Custom CRM systems, admin panels and business applications tailored to your company processes. Accounting integrations, payment gateways, reports.

CRM / ERP SystemsAdmin panelsAPI integrationsReports & analytics

43 DDD packages105+ backend modules

AI & Document Processing

Multi-provider LLM integration (OpenAI, Claude, Azure, Mistral). RAG with pgvector. Multi-provider OCR. Structured outputs with Zod.

OpenAI / Claude / MistralRAG with pgvectorOCR (Textract, Form Recognizer)AI SDK & LangChain

130+ AI queue handlersMulti-provider LLM

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.

Vue.js / NuxtReact / Next.jsTailwindCSS / shadcn/uiMUI / Zustand / Pinia

12+ Vue.js projectsSentry + GA + Hotjar

DevOps & Cloud

Containerization, orchestration and deployment automation. Kubernetes, Helm, ArgoCD, Ansible, AWS, Serverless.

Docker / Kubernetes (K3s)Helm Charts / ArgoCDAnsible / CI/CDAWS / Azure / Serverless

6 Helm charts (Voyeta)GitOps workflow

CMS, Automation & IoT

WordPress sites, CLI tools, web scraping, physical device integrations (card readers, tokenization).

WordPress / WooCommerceCLI tools (npm)Web scrapingIoT integrations

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

Latest project

My Products

Products of my own, built from the ground up

tfgraport.pl

Upload scans, PDFs and invoice photos — AI reads the data, validates it and assembles a compliant contract report for the Polish Tourist Guarantee Fund.

NestJSAstroPostgreSQLOpenAIStripe

Zorynthia

zorynthia.eu

AI tarot and astrology. Ask a question and get an immersive card reading, interpreted in six languages and available around the clock.

Nuxt 4NestJSPostgreSQLOpenAIRedis

Nie dla normalnych

niedlanormalnych.pl

A party card game for adults. Players join from their phones while the TV reads every card aloud in an AI voice. No signup, no box.

Next.js 15NestJSSocket.IOPostgreSQLRedis

Spedly Coming soon

spedly.eu

A transport management platform with a private freight exchange for forwarders. Real-time auctions, driver notifications and multi-branch operations.

NuxtNestJSPostgreSQLSocket.IORedis

Voyeta Coming soon

voyeta.eu

An operating system for travel agencies. CRM, trip sales, contracts, invoices and automated TFG/TFP reporting in one platform instead of a spreadsheet.

Nuxt 4NestJSPostgreSQLOpenAIBullMQ

10+ years

40+ projects

4 languages

19+ microservices

105+ modules

43 DDD packages