Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I am a technical manager or data engineer with 10 years of experience, passionate about product leadership, technology, and data within agile organizations with a strong vision. After founding Lettria and mentoring startups at École 42 incubated at Station F, I've grown a strong appetite for product development. In 2024, I embarked on a one-year world tour through Latin America and Southeast Asia to explore ecological and human challenges, reconnecting meaning with technology and focusing on meaningful, sober projects grounded in reality.…I am a technical manager or data engineer with 10 years of experience, passionate about product leadership, technology, and data within agile organizations with a strong vision. After founding Lettria and mentoring startups at École 42 incubated at Station F, I've grown a strong appetite for product development. In 2024, I embarked on a one-year world tour through Latin America and Southeast Asia to explore ecological and human challenges, reconnecting meaning with technology and focusing on meaningful, sober projects grounded in reality.

Marian Szczesniak

Data Scientist, AI Engineer, Developer, +4





I am a technical manager or data engineer with 10 years of experience, passionate about product leadership, technology, and data within agile organizations with a strong vision. After founding Lettria and mentoring startups at École 42 incubated at Station F, I've grown a strong appetite for product development. In 2024, I embarked on a one-year world tour through Latin America and Southeast Asia to explore ecological and human challenges, reconnecting meaning with technology and focusing on meaningful, sober projects grounded in reality.…I am a technical manager or data engineer with 10 years of experience, passionate about product leadership, technology, and data within agile organizations with a strong vision. After founding Lettria and mentoring startups at École 42 incubated at Station F, I've grown a strong appetite for product development. In 2024, I embarked on a one-year world tour through Latin America and Southeast Asia to explore ecological and human challenges, reconnecting meaning with technology and focusing on meaningful, sober projects grounded in reality.

Available to hire

I am a technical manager or data engineer with 10 years of experience, passionate about product leadership, technology, and data within agile organizations with a strong vision. After founding Lettria and mentoring startups at École 42 incubated at Station F, I’ve grown a strong appetite for product development. In 2024, I embarked on a one-year world tour through Latin America and Southeast Asia to explore ecological and human challenges, reconnecting meaning with technology and focusing on meaningful, sober projects grounded in reality.

Skills

Experience Level

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Spanish; Castilian

Intermediate

Work Experience

Co-founder & Chief R&D at Lettria

January 1, 2017 - Present

Co-founded Lettria, a deeptech startup specialized in automatic natural language processing with a pioneering focus on French semantic NLP. Defined product and technology vision, managed multiple teams (data scientists, linguists, developers), developed the NLP stack including data structuring and document parsing. Acted as client-technical liaison to translate business needs into scalable NLP tools. Achievements include managing 25 collaborators, leading to a €5 million seed round in 2022 and winning multiple industry awards including iLab. Key clients included EDF, APHP, Euronext, ADEME, and various B2B startups.

R&D Engineer at Testamento

December 31, 2017 - August 5, 2025

Developed several APIs for scraping, image cropping, chatbots, data extraction, and OCR for identity cards.

Journalist at La Lettre de l'Audiovisuel

December 31, 2017 - August 5, 2025

Wrote articles, conducted interviews, and managed press conferences for this daily publication targeted at audiovisual professionals.