I build software brains

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THE FUTURE
IS NOT
PREDICTED.
IT'S
ENGINEERED.
AI ASSISTANT ONLINE

Ask me anything

Powered by RAG — I answer questions about projects, skills, and experience

JP

Hi! Ask me about projects, skills, or experience.

Powered by RAG Pipeline · Pattern matching · No API calls

Specialization

Deep expertise

⚙️

Production LLM Systems

From prototype to production — building reliable AI systems

0%uptime<0mslatency
LangChainFastAPIRedis
⬡

RAG Architecture

Advanced search systems with vector databases

0%fewer hallucinations
PineconeWeaviateChromaDB
📊

AI Cost Optimization

Intelligent caching and evaluations — AI that pays off

0%cost reduction
RedisPrompt OptimizationBatch
⚡

MLOps & Monitoring

Full observability — from ingestion to production

Real-time tracing
LangSmithPrometheusGrafana

AI ENGINEERING + EXPERTISE

= Real
Impact

I combine cutting-edge AI research with production systems that deliver measurable business value.

⚙️
Production LLM Systems
RAG pipelines, fine-tuned models and AI agents running reliably at production scale.
🧠
ML Architecture & Strategy
Designing scalable ML infrastructure with cost optimization and evaluation frameworks.
🚀
AI-Powered Products
From prototype to deployment — turning AI capabilities into intuitive user experiences.
ENGINEERING THE FUTURE
ENGINEERING THE FUTURE
About me

Jakub Prejzner

AI Engineer & LLM Systems Architect

I specialize in building production AI systems — from RAG pipelines, through model fine-tuning, to full MLOps infrastructure. My solutions serve thousands of daily users with documented cost and hallucination reduction.

I combine deep technical knowledge with a practical business approach. I treat every project as an engineering challenge where what matters is not just working code, but measurable business impact.

👥
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Daily users
🎯
0%
Fewer hallucinations
💰
0%
Cost reduction
⚡
0%
Systems uptime
Projects

What I build

Production AI systems solving real problems

Q&A System with RAGNEURAL_SCAN
0%
fewer hallucinations

Q&A System with RAG

Hybrid search system combining semantic and keyword search for accurate AI answers

LangChainPineconeFastAPI
Evaluation FrameworkNEURAL_SCAN
0%
lower costs

Evaluation Framework

Automated LLM evaluation pipelines — measuring accuracy, relevance, and safety

PythonOpenAIPytest
LLM ArchitectureNEURAL_SCAN
0+
daily users

LLM Architecture

Complete systems from document ingestion to real-time monitoring

FastAPIAsyncTracingRedis
Chat InterfaceNEURAL_SCAN
0%
API cost reduction

Chat Interface

Intelligent caching layer reducing API costs while maintaining sub-second responses

Next.jsRedisOpenAI
→ SCROLL
TECH STACK
PythonTypeScriptLangChainOpenAIPineconeAnthropicWeaviateChromaDBPythonTypeScriptLangChainOpenAIPineconeAnthropicWeaviateChromaDBPythonTypeScriptLangChainOpenAIPineconeAnthropicWeaviateChromaDB
FastAPINext.jsRedisAWSDockerPostgreSQLVercelGitHubFastAPINext.jsRedisAWSDockerPostgreSQLVercelGitHubFastAPINext.jsRedisAWSDockerPostgreSQLVercelGitHub
EDUCATION & CERTIFICATES

Continuous growth

On the front of AI engineering

Building Generative AI-Powered Applications with Python
IBM
Verify →
02 / 2026
Python for Data Science, AI & Development
IBM
Verify →
01 / 2026
Generative AI: Introduction and Applications
IBM
Verify →
10 / 2025
Generative AI and LLMs: Architecture and Data Preparation
IBM
Verify →
2025
About Me
“Models alone are no longer enough. The real advantage is the ability to turn them into working products. That’s where the greatest challenge of modern AI engineering lies.”

Let's build something together

Looking for an AI engineer who delivers production systems? Let's talk about your project.

Get in touchAbout Me
GitHubLinkedIncontact@jakubprejzner.eu