I will fine-tune and train custom LLM models on your data

Andrei Popescu
Andrei Popescu Top Rated
4.8 (315)· 677 orders completed ·Romania

About this service

Off-the-shelf models giving generic answers? I fine-tune large language models on your proprietary data so the output matches your domain, voice, and accuracy requirements.

  • Dataset preparation, cleaning, and formatting for training
  • Fine-tuning open models (Llama, Mistral) or OpenAI/Anthropic where supported
  • LoRA / QLoRA efficient training to keep costs low
  • Evaluation, benchmarking, and overfitting checks
  • Model export, hosting guidance, and inference setup

I've trained and shipped domain-specific models for legal, medical, and e-commerce clients. My priority is measurable improvement, not just a finished checkpoint, so every job includes before/after evaluation.

Send me a sample of your data and target task. I'll advise whether fine-tuning, RAG, or prompting is the right call before you spend a dollar. Let's build a model that truly knows your business.

About the seller

Andrei Popescu
Andrei Popescu Top Rated
Full-stack AI development & intelligent chatbots
4.8 (315)

Bucharest-based AI developer building custom chatbots, document-analysis tools, and AI-powered web apps. Strong across Python, Node, and modern model APIs with a focus on reliable, maintainable systems. I've delivered for clients in fintech, legal, and e-commerce. Pragmatic, communicative, and on schedule.

FromRomania
SpeaksRomanian, English
LevelExpert
Orders677
Contact me

Reviews

★ 4.8
315 reviews
for this service
D
David Lindqvist
🌐 Sweden
3 weeks ago
5.0 (0)
Fine-tuned model massively outperformed our base prompts. Clear eval reports too.
P
Priya Nair
🌐 India
3 months ago
5.0 (0)
Knew exactly when fine-tuning made sense vs RAG. Saved us money and time.
T
Thomas Müller
🌐 Germany
5 months ago
4.0 (0)
Strong technical work. Wished for a bit more documentation but he added it on request.
G
Grace Tan
🌐 Singapore
7 months ago
5.0 (0)
Our domain model now answers medical queries far more reliably. Highly recommend.
C
Carlos Mendes
🌐 Brazil
10 months ago
5.0 (0)
Professional, responsive, and the benchmarks were transparent. Will hire again.

More services by Andrei Popescu

People also viewed

See more →