Téo Lohrer

Research Engineer & AI Tech Lead — Paris, France

Ten years in cryptology, defense AI, and research; now building agentic RAG systems.

Experience

now

Rnest.io — La mètis

Tech Lead, Artificial Intelligence

Responsible for AI innovation and development for automated analysis of large corpora from web crawlers. Designed the agentic RAG system end to end:

Discovery loop — autonomous query derivation, hybrid dense/BM25 retrieval with RRF fusion, cross-encoder reranking, LLM-based document selection.

Report generation — citation-grounded: planning, fact-block drafting, multi-pass correction, citation post-processing.

Architecture — polylith, FastAPI, YAML-driven multilingual prompts, fully local LLM.

agentic topic modeling / agentic rag / chromadb / bm25 / cross-encoder reranking / fastapi / local llm

SUMMIT — Sorbonne University

Research Engineer, Project Lead

Research-engineering missions across Sorbonne University labs and institutes — internet topology measurement, AI experiment tooling, VR for Parkinson's research, medical-data compliance — plus lecturing at Polytech Sorbonne.

python / rust / unity / c# / fastapi / teaching
LIP6 + MLAB (Google CS&S): Internet ICMP mapping

Improved on the state of the art — 15% fewer probes and higher precision, rewritten combinatorics formulas, and a new known-topology test framework for validating probing strategies against simulated ground truth. Carried out in the DIOPTRA internet-measurement group.

rust / python / combinatorics
LIP6: Experimaestro — AI experiment-plan management

Strict runtime type-checking of experiment programs and a cluster/client communication layer for distributed AI research workflows.

python
Institut du Cerveau: VR experiment, Parkinson's research

Redesigned the experimenter control application and the VR playback system; built correlation between VR gameplay data, motion-capture sensors, and eye-tracking for freezing-of-gait analysis.

unity / c# / python
CNRS: Medical-data compliance app

Multi-user full-stack application converting iEEG and behavioral research data to the BIDS standard, with validation and quality-assurance checks built in.

fast-api / vue.js / python
Polytech Sorbonne: Lectures, instructor

Python OOP lecture series, lead of the "Tools for Computing" course, and an "Introduction to Rust" seminar.

python / rust / git

Ministry of the Armed Forces

Tech Lead, Cryptology & Artificial Intelligence

Managed a team of eight engineers. Planned and tracked research projects and maintained critical systems in operational condition. Supervised fifteen internships, coordinated the team's research seminars, and oversaw the port of tens of thousands of lines of Perl to Python.

project & team management / machine learning / reinforcement learning
Cryptology & Artificial Intelligence Engineer

Developed innovative NLP and algorithmic methods for operational applications. Designed and implemented high-performance algorithms for distributed computing. Led the codebase's industrialization — within two years, from Subversion and VMs to a microservice architecture with GitLab, CI/CD, Docker, Kubernetes, quality metrics, monitoring, and structured logging.

python / c / hpc / nlp

Thales Alenia Space

Cryptography Engineer

Developed cryptographic software securing satellite communications — the team's reference point on cryptography. Designed automated testing methodologies in Python and maintained critical C/C++ systems that remain in production.

c / c++ / python / cryptography / satellite systems

Education

Bachelor's in Mathematics and Computer Science

Université de Paris — Paris 7 Diderot

Skills

Expertise

Deep learning RAG, agentic workflows, prompt engineering

Algorithms finite automata, combinatorics, NLP

Cryptology key-management infrastructure, cryptanalysis

Programming

Languages Python, Rust, C

Technologies Docker, git, GitLab, uv, FastAPI, Django, Claude Code, polylith, vim, LaTeX

Management

Project planning, agile tracking, client relations

Technical technical-debt management, review process

Team recruiting, evaluation, conflict resolution

Natural languages

French strong writing skills, fluent speaker

English fluent, written and spoken, international seminars and presentations

Contact

contact@teolohrer.net

Paris, France

Download CV (PDF, English) · French version