Senior Full Stack Developer | SaaS, AI/RAG, Marketplace & ERP/CRM

I build production-grade SaaS platforms, AI agent systems, RAG knowledge bases, marketplaces, ERP/CRM tools, and automation-heavy web/mobile products.

My strongest value is combining full-stack engineering + AI workflow design: clean React/Next.js frontends, scalable Node.js/Python/Ruby on Rails backends, reliable databases, API integrations, queues, vector search, LLM workflows, and AI agents that solve real business problems.

???? 6+ years building SaaS, marketplaces, ERP/CRM, booking systems, AI platforms, and eCommerce products

???? AI agents, RAG systems, OpenAI API, LangChain, vector DBs, automation workflows

???? 30+ successful software projects delivered with strong client satisfaction

???? 80,000+ products managed in multi-market eCommerce systems

???? 98% on-time delivery achieved in logistics platforms with AI route optimization

? 10x faster page rendering after legacy platform migration

???? 45% faster information retrieval with RAG-based internal knowledge systems

???? WHAT I DO

I'm building an AI-powered SaaS, internal AI assistant, RAG knowledge platform, automation system, marketplace, ERP/CRM, booking app, or eCommerce product.

I can help you design, build, and launch the full system: frontend, backend, database, AI workflows, integrations, admin dashboards, user roles, payments, deployment, and post-launch scaling.

I do not just “connect OpenAI API.” I design the complete AI workflow around your business process: what data the AI can access, when it should call tools, how it retrieves documents, how humans review outputs, how errors are handled, and how the system improves over time.

???? AI / AGENT SYSTEMS I BUILD

? AI agents for business workflow automation

? RAG platforms with citation-based answers

? AI chatbots connected to databases, CRMs, APIs, and documents

? AI content generation systems for SEO and marketing

? AI assistants for support, operations, sales, and back-office teams

? OCR, document ingestion, summarization, classification, and extraction

? Vector search, hybrid retrieval, embeddings, and pgvector

? Tool-calling agents connected to calendars, CRMs, payment systems, and internal APIs

? Human-in-the-loop review flows for sensitive AI outputs

? Prompt tracing, fallback handling, monitoring, and answer-quality evaluation

???? PLATFORMS I BUILD

? SaaS platforms and internal business tools

? AI/RAG platforms, AI agents, chatbots, and knowledge bases

? Multi-vendor marketplaces and booking platforms

? ERP/CRM systems for sales, HR, logistics, and service teams

? eCommerce platforms with warehouse, payment, and marketplace integrations

? Admin dashboards, analytics systems, and reporting tools

? Legacy system rescue, refactoring, migration, and modernization

???? SELECTED PROJECTS

Visdeal - Multi-market eCommerce platform with warehouse automation for 80,000+ products across Europe.

Features and Stack: Product catalog, inventory sync, marketplace integrations, warehouse automation, QR scanning, payments, AI translation | Ruby on Rails, Elixir/Phoenix, RabbitMQ, Docker, Adyen, DeepL, Picqer

RAG Knowledge Platform - Internal AI knowledge platform for a commercial real estate operator managing lease, vendor, maintenance, and compliance documents.

Features and Stack: RAG search, document ingestion, citation-based answers, role-based access, hybrid retrieval, fallback responses, answer-quality tracing | React, Python, FastAPI, OpenAI API, Vector Database, PostgreSQL

AI/ML Route Optimization Platform - Logistics platform for freight delivery with AI-based routing, vehicle matching, live ETA, and dispatcher support.

Features and Stack: AI route optimization, real-time ETA, traffic/weather logic, driver app, dispatcher dashboard, proof of delivery, analytics | Python, ML, Node.js, PostgreSQL, React Native

ScaLex - Custom ERP/CRM system for automotive dealership operations, sales, service, spare parts, accounting, and analytics.

Features and Stack: CRM dashboards, sales pipeline, service workflows, spare parts inventory, accounting modules, role-based access, reports, legacy integrations | Ruby on Rails, PostgreSQL, MySQL, JavaScript, Bootstrap

???? TECH STACK

Frontend: React.js, Next.js, TypeScript, Vue.js, Tailwind CSS, Redux, Zustand

Backend: Node.js, Express.js, NestJS, Python, FastAPI, Ruby on Rails, Laravel

AI: OpenAI API, AI Agents, RAG, LangChain, LangSmith, vector databases, pgvector, embeddings, OCR, automation

Database: PostgreSQL, MySQL, MongoDB, Redis, Supabase, Prisma

Mobile: React Native, Flutter, iOS, Android

Cloud & DevOps: AWS, GCP, Docker, CI/CD, GitHub Actions, Vercel, Firebase

Payments & Integrations: Stripe, Adyen, PayPal, Mercado Pago, Twilio, SendGrid, Google Calendar, Shopify, marketplace APIs

???? Building an AI agent, RAG platform, SaaS product, marketplace, ERP/CRM, booking app, or automation system?

Send me your idea or existing system, and I’ll help you turn it into a scalable product with clean architecture and real business value.

Skills