About Krzysztof
Specialized in building intelligent, autonomous AI Agents, AI-powered automation systems, and production-ready full-stack applications.
With over 8 years of experience in modern web development and AI integrations, I design and deliver sophisticated AI Agents that solve real business problems - from intelligent chat assistants and adaptive recommendation engines to fully autonomous multi-agent workflows.
Core Expertise
- AI Agents & Agentic Systems: Design, development, and deployment of autonomous AI agents using LLMs (OpenAI, Claude, etc.).
- RAG Architectures: Retrieval-Augmented Generation systems for context-aware, accurate, and knowledge-grounded agents.
- AI Automation: End-to-end workflow automation with n8n, Make.com, and custom agent orchestration.
- LLM Integration: Prompt engineering, tool calling, memory management, and multi-step reasoning agents.
What I Deliver
- Intelligent AI Agents for customer support, lead qualification, content generation, data analysis, and coaching/personalization.
- AI-powered SaaS platforms with real-time capabilities and personalized user experiences.
- Automated business processes that reduce manual work through smart agents and workflow orchestration.
- Custom RAG solutions connected to your documents, databases, or knowledge bases.
- Seamless integration of AI Agents into existing applications or as standalone tools.
Notable Projects
- FitCore — AI-Powered Fitness SaaS: Built autonomous AI Agents that generate personalized workout plans, provide adaptive coaching, and deliver progress insights using LLM + RAG capabilities.
- Multiple enterprise automation solutions using n8n + AI Agents for CRM enrichment, lead routing, and intelligent notifications.
- Custom voice and chat agents with natural conversation flows and tool integration.
Tech Stack Highlights
AI Agents • n8n • Make.com • LLM • RAG • OpenAI • Claude • Next.js • NestJS • Supabase • TypeScript • React • Vercel • Workflow Automation • Prompt Engineering
English
Native or bilingual
Remote only
Primarily works remotely
Experience
- AccentureSoftware DeveloperSOFTWARE PUBLISHINGMay 2018 - July 2020 (2 years and 2 months)Dublin, Ireland
- Full-Stack AI Engineer delivering end-to-end AI-powered solutions using Next.js, NestJS, React, TypeScript, and Supabase. Specialized in building intelligent AI Agents, LLM integrations, and automated workflows that combine robust backend APIs, real-time databases, and modern, responsive frontends.
- Agile team contributor, collaborating with cross-functional teams to deliver AI-driven features, influencing architectural decisions around AI integration and automation, and communicating complex technical solutions clearly to both technical and non-technical stakeholders.
- DevOps & tooling expertise, leveraging Docker, GitHub Actions, CI/CD pipelines, and quality tools to support scalable deployment of full-stack AI solutions and automated workflows. Experienced with API testing (Postman), infrastructure as code, and monitoring for AI agent performance.
- Strong quality & testing ownership in AI-enhanced applications, building reusable test frameworks, writing comprehensive unit/integration tests for both traditional backend/frontend and AI agent components, and ensuring reliability of LLM outputs and automation workflows.
- AI Agent & Automation Specialist, designing and implementing production-grade AI Agents with n8n, Make.com, RAG pipelines, and LLM orchestration (OpenAI, Claude). Developed intelligent automation systems for complex business processes, including multi-agent architectures, prompt engineering, and seamless third-party integrations.
- Papeer IncAI Agent | Voice Agent | LLM | AI EngineerSOFTWARE PUBLISHINGOctober 2020 - May 2023 (2 years and 7 months)New York, United StatesFitCore – AI-Powered Fitness SaaS PlatformBuilt and launched FitCore, a modern SaaS platform that enables fitness coaches to efficiently manage clients, create personalized workout plans, and track client progress with intelligent AI assistance.Key AI Features Implemented:
- Developed AI Agents that generate personalized workout plans, nutrition recommendations, and progress insights based on client data.
- Integrated LLM-powered features (OpenAI/Claude) for intelligent chat assistance, form analysis, and adaptive training suggestions.
- Built RAG-based AI system for retrieving and applying knowledge from training libraries, exercise databases, and best practices.
- Automated client onboarding, progress reporting, and coaching recommendations using AI Automation workflows.
Responsibilities & Achievements:- Designed and developed the full product end-to-end — modern UI/UX, scalable database architecture, authentication, and subscription logic (Stripe).
- Architected and implemented AI Agent infrastructure for intelligent content generation and client engagement.
- Built real-time client progress tracking with AI-driven insights and recommendations.
- Integrated LLM and RAG capabilities to deliver personalized coaching experiences at scale.
- Set up complete deployment pipeline, performance optimization, and monitoring on Vercel.
- Successfully launched and currently live in production with active users and coaches.
- IT Flow AIFull Stack developer | AI developerSOFTWARE PUBLISHINGNovember 2023 - April 2026 (2 years and 5 months)Warsaw, PolandNow I’m a Full Stack Developer, SaaS Developer, AI Developer and AI Engineer.Leading SaaS Development for AI-powered startup founders — shipping production-ready SaaS products from idea to launch in 6-12 weeks. I act as a Full Stack Developer and AI SaaS Architect, owning multi-tenant SaaS architecture, AI system design, end-to-end delivery.I integrate LLMs (GPT-5, Claude, Llama/Mistral), build RAG pipelines with vector databases for production AI features inside SaaS. Full Stack: React frontends, Python, Node.js APIs, TypeScript across the stack.I operate as an AI Architect and technical co-founder — scoping SaaS MVPs, making architecture decisions, leading a senior boutique small team.My Stack: Python, FastAPI, Node.js, React, Next.js, TypeScript, Supabase, pgvector, Qdrant, LangChain, RAG, FAISS, Pinecone, Claude, OpenAI, Voyage embeddings, Cohere rerank, PostgreSQL, Docker, AWS, Hetzner.
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Education
- Master of Computer ScienceUniversity of Warsaw2017