Leon H.
AI & Machine Learning | RAG | Natural Language Processing
I specialize in developing innovative AI and machine learning solutions with a focus on deep learning and natural language processing. My experience includes utilizing Python, PyTorch, and Huggingface to create models that tackle complex problems and enhance data-driven decision-making. With a Master of Science in Computer Science and a Bachelor’s in Information Technology, I have a strong technical foundation complemented by excellent problem-solving and collaboration skills. I thrive in dynamic environments where I can contribute to cutting-edge projects. If you need a forward-thinking engineer ready to turn ideas into impactful solutions, I’m here to help. Let’s connect and discuss how I can support your goals. I have experience building RAG systems, a lot of experience in training transformer models for retrieval but also for text classification. Plus, I have Web Dev experience with FastAPI and React, and AWS.
Earnings and projects
Last 6 months ÷ 5.1 months active (since Jun 2026)
Last 6 months: $12k
Billed in all: $12,290$12k
$12k in the last 6 months
Earnings, last 30 days
Skill rankings: #1 in 1 skill of 15
Rarest: top 1% in NLTK, of 84. Ranked by MRR among everyone on Upwork with the skill.
- NLTK84 freelancers · 🇩🇪 #1Top 1%🇩🇪#1 of 1
- #17Hugging Face300 freelancers · 🇩🇪 #1Top 6%🇩🇪#1 of 3
- #19NumPy587 freelancers · 🇩🇪 #2Top 3%🇩🇪#2 of 9
- #26Python Scikit-Learn555 freelancers · 🇩🇪 #2Top 5%🇩🇪#2 of 6
- #55pandas1,317 freelancers · 🇩🇪 #2Top 4%🇩🇪#2 of 22
- #94PyTorch1,585 freelancers · 🇩🇪 #1Top 6%🇩🇪#1 of 26
- #347Git5,766 freelancers · 🇩🇪 #5Top 6%🇩🇪#5 of 69
- #397FastAPI4,337 freelancers · 🇩🇪 #6Top 9%🇩🇪#6 of 34