Hi, I'm Cezar. AI Engineer.

AI Data AgencyDocument extraction & processing engine

Uploaded contracts, policies and statements run through OCR and a staged LLM pipeline that writes structured, audited data onto real CRM and asset records.

Built for a compliance-heavy environment: nothing is overwritten.

0+attribute types extracted

Athlete AI EvaluationAI video coaching for athletes

Video coaching tool that breaks each attempt into phases and grades technique against exact frame references.

Trained on self-annotated footage, it scores each phase independently in x/y/z.

frame-accuratefeedback granularity

Seagull Detection & DeterrentAutonomous bird deterrent

On-edge multi-camera detection driving an 8-point directional audio deterrent across a fish farm, fighting the fish-stealing birds.

The full loop runs on-site, no cloud dependency.

0/7on-edge, autonomous

AI Data AgencyDocument extraction & processing engine

Athlete AI EvaluationAI video coaching for athletes

Seagull Detection & DeterrentAutonomous bird deterrent

  • SmartBin

    Scan-triggered waste classifier: a camera and a trained vision model identify the material, then a stepper-motor bin rotates the right compartment into place.

  • Stem-Aware AI Mastering

    Stem-aware neural architecture that predicts mastering parameters for a differentiable DSP chain, evaluated against professional streaming loudness standards.

Skillset

ML / AI

  • PyTorch
  • LLMs & RAG
  • Transformers / HF
  • CV / OpenCV
  • Fine-tuning
  • Embeddings / Vector DB

Agentic Engineering

  • Spec-first
  • Plan & tasks
  • Verification loops
  • Sandboxing
  • Exit gates
  • Context mgmt
  • Retrieval stack
  • Guardrails

Languages

  • Python
  • TypeScript
  • C#
  • Swift

Infra

  • Django
  • Node.js
  • Docker
  • Kubernetes
  • MLOps

Cloud

  • AWS
  • Azure
  • VPS

Edge & IoT

  • ESP32
  • Raspberry Pi
  • Edge Inference

Compliance

  • GDPR
  • HIPAA

Soft

  • Agile / Scrum
  • Project management
  • Technical translation
  • Clear communication
  • Team collaboration

Why read? Just ask

Grounded in my real projects.

This is the reasoning layer of this portfolio. Ask anything: how do my systems work, my experience, background. Your call.

or view my resume →

Who am I?

Marius Cezar Sirbu

English, Romanian, Russian, German (B1), Dutch (learning)

22, AI Engineer from Moldova, based in the Netherlands.

I like understanding how something works before I build on top of it. If a pipeline stage is failing or a model is behaving strangely, I’ll dig until I can explain why, not just patch around it. I studied Creative Tech & AI at Howest, and my final project, for a firm processing financial documents, turned into a job at AI Square Group.

I like clearly scoped problems and ownership over how I solve them. I say directly when I think I’ve gone too deep on something, and I don’t mind admitting I’m wrong if the reasoning is sound.

Outside work, music has been a constant my whole life: eight years of percussion, now producing techno. Beyond that, motocross (3rd nationally), aeromodelling, rocketry, and rollerskating.

I also love cats.