Sebastian B.
AI Engineer | Specialized in LLM Fine-Tuning, RAG Pipelines
AI Engineering Lead and PhD researcher in AI/ML, certified in Claude by Anthropic. I design and ship production systems built around Claude: agents, RAG pipelines, and automations that actually make it to deployment Over the past 7 years I've helped more than 20 companies put AI into production across the US, Europe, and the Middle East. I've led engineering teams at startups large and small, and I bring a consistent track record as a high performer on the work I take on I post regularly on Medium, X, and YouTube on the latest in AI, ML, and tech, which keeps me on top of how fast the field moves, with an audience of over 10,000 across platforms. I share this work publicly partly because teaching a thing is the best test of whether you understand it What I build: - RAG chatbots and agents over your documents, PDFs, Notion, and knowledge bases - LLM fine-tuning on your domain data - Workflow automations that replace 40–80% of manual operations - Solution architecture, so you commit to the right stack the first time - Recovery work on stalled or underperforming AI projects Send over the project and I'll reply the same day with a plan, a clarifying question, or an honest pass
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $1.3k
Billed in all: $10,435$10k
$653 in the last 6 months
Across 10 contracts
Earnings, last 30 days
Skill rankings: Top 25% in Python
Ranked by MRR among everyone on Upwork with the skill.
- #75AI Audio Generator202 freelancers · 🇷🇴 #1Top 37%🇷🇴#1 of 2
- #148MLOps468 freelancers · 🇷🇴 #1Top 32%🇷🇴#1 of 2
- #182AI Audio Generation482 freelancers · 🇷🇴 #1Top 38%🇷🇴#1 of 3
- #430Desktop Application1,674 freelancers · 🇷🇴 #4Top 26%🇷🇴#4 of 13
- #540AI Bot1,765 freelancers · 🇷🇴 #2Top 31%🇷🇴#2 of 8
- #770LLM Prompt Engineering2,457 freelancers · 🇷🇴 #6Top 31%🇷🇴#6 of 14
- #782App Development2,592 freelancers · 🇷🇴 #3Top 30%🇷🇴#3 of 14
- #952Mobile App3,535 freelancers · 🇷🇴 #8Top 27%🇷🇴#8 of 23