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Leonard T.
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Leonard T.

Senior AI Engineer | LLM/RAG Agents to Production | ML PhD

I take AI systems from prototype to production : RAG, agents, LLM pipelines and forecasting models that hold up under real traffic and real money. Most teams can build a demo. Shipping one that survives contact with users is a different job, and it's the one I do. WHAT I'M USUALLY BROUGHT IN FOR • GenAI to production : RAG and agent architecture, evaluation harnesses, LLM pipelines, cost and latency work. Turning a prototype into something you can put in front of customers. • Forecasting and time-series : demand, price, load, capacity. Feature and validation design, and putting a model where a decision actually depends on it. • Private / on-prem LLM : self-hosted models and RAG over internal data, when the data can't leave your perimeter. WHY ME RATHER THAN SOMEONE CHEAPER The rigour: a PhD in machine learning applied to European day-ahead power markets (a domain where a bad forecast loses money by lunchtime) and the Frontier Prize for best paper at IDA 2023. The track record: 14 months of applied research on diffusion models for a US client, and three full applications designed, built and launched solo with AI agents as the build team, the third live in a single day (see the portfolio). HOW I WORK Long-term hourly, async-friendly across US and EU time zones. Happy to take a 30-minute call and tell you honestly whether I'm the right person for it.

🇫🇷Paris, France$120/hr100% JSS5.00 (2)Since Mar 2025

Earnings and projects

MRR
$1.4k

Last 6 months ÷ 6

World#33,580 / 412k
🇫🇷Country#154 / 2,884
Revenue, last 30 days
$0

Last 6 months: $8.6k

Total earnings
$33k

Billed in all: $36k

World#103,836 / 412k
🇫🇷Country#563 / 2,884
Per project
$8.2k

$4.3k in the last 6 months

World#20,211 / 412k
🇫🇷Country#91 / 2,884
Projects, last 6 months
2
0% fixed100% hourly
World#88,918 / 412k
🇫🇷Country#511 / 2,884
Projects in all
4

Across 5 contracts

40% fixed60% hourly
World#283,741 / 412k
🇫🇷Country#1,969 / 2,884

Earnings, last 30 days

$35.9kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$35.0k$35.5k$36.0k$36.5kOct 8Oct 23Nov 7

Skill rankings: Top 9% in Data Science

Ranked by MRR among everyone on Upwork with the skill.

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