>>> print("hello, world")

Open to a Data & AI work-study (M1 & M2), available now

Seyni Junior
Baldé.

Data & AI engineer

I turn messy data into tools people actually use: pipelines, ML models, LLM assistants. Fewer slides, more results.

Seyni Junior Baldé
projects
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contributions this year
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About.

I build the plumbing between raw data and useful answers. And I make sure it doesn't leak.

Engineering student in Big Data & Machine Learning at EFREI Paris. At RiskHunter and YMUNIT I worked on data pipelines, RAG systems and LLM integrations for cybersecurity teams. I like to understand the models I use, down to the math when needed, and I favour solutions that are simple, measurable and explainable.

Off the keyboard

  • Photography & editing
  • Formula 1
  • Muay Thai
  • Video games
  • Reading

Volunteering

  • Ef'reussite (homework help)
  • EAH (humanitarian aid)
  • QuartierVertChallenge (reforestation)
seyni.head(7)
Facts about Seyni
fieldvalue
0based_inNanterre, Île-de-France
1schoolEFREI Paris, Big Data & ML
2looking_forWork-study, 24 months, 3 days work / 2 days school
3languagesFrench (native), English C2, Spanish B1
4certsEBIOS Risk Manager, CS50P, Cisco Cybersecurity, PIX
5in_progressMicrosoft AI-901, AI-300, AI-103, CS50 AI
6awardTop scorer (40%), AXA Challenge 2025
7 rows × 2 columns

Stack.

Languagesn=7

  • Pythonin 16 projects
  • SQLin 1 project
  • C#in 4 projects
  • C++
  • TypeScriptin 4 projects
  • Javain 1 project
  • Dartin 3 projects

Data engineeringn=6

  • Apache Airflowin 1 project
  • Apache Spark
  • Pandasin 3 projects
  • NumPyin 1 project
  • PostgreSQLin 2 projects
  • Dockerin 3 projects

Machine learningn=5

  • Scikit-learnin 2 projects
  • Jupyterin 5 projects
  • Plotly
  • Matplotlibin 4 projects
  • Hugging Face

Generative AIn=7

  • LLMin 5 projects
  • RAG
  • LangChain
  • ChromaDBin 1 project
  • Mistralin 1 project
  • Ollamain 2 projects
  • vLLM

APIs & visualisationn=6

  • FastAPIin 1 project
  • Streamlitin 2 projects
  • Metabasein 1 project
  • Power BI
  • Flutterin 3 projects
  • Spring Bootin 1 project

Cloud & toolingn=6

  • AWSin 1 project
  • Amazon Bedrockin 1 project
  • Git
  • GitHub
  • .NETin 4 projects
  • Figmain 1 project

Journey.

ExperienceEducation
  1. Sep 2026 - present

    Engineering degree, Big Data & Machine Learning

    now

    EFREI Paris Panthéon-Assas, Villejuif

    • Work-study track, 2026 to 2028
  2. Aug 2026 - Oct 2026

    Data & AI Engineer (work-study)

    RiskHunter, Paris

    • Data/ML pipeline with a Streamlit interface and a FastAPI API: ingestion, LLM inference, MITRE ATT&CK / D3FEND scenario generation and analysis metrics
    • Product thinking and architecture choices; AWS / Amazon Bedrock, data governance, GRC and cyber risk
  3. Jan 2026 - Apr 2026

    AI / Data Engineering Intern

    YMUNIT, Paris

    • End-to-end mapping pipeline over 40+ security frameworks: 80% less processing and preparation time for RAG use
    • LLM scoring and summaries with the Mistral API and Ollama (local)
  4. Nov 2025 - present

    Math & CS Tutor

    now

    Les Sherpas, Nanterre

    • 20+ hours of math and computer science tutoring
    • Course materials and personalised follow-up
  5. Apr 2025 - Jul 2025

    Software Engineering Intern

    Atos, Dakar

    • Flutter/Dart and Spring Boot microservices: 3 API modules and 2 key features shipped in Agile/Scrum with Gitflow
  6. Jan 2025 - present

    Freelance Developer

    now

    Independent, Remote

    • Web and mobile apps for clients: Figma, Flutter, WordPress, Shopify
    • Post-delivery support and maintenance for 5+ clients
  7. Sep 2023 - Jun 2026

    Engineering cycle, Data & AI

    CESI École d'Ingénieurs, Nanterre

    Top of class 2025-26

    • Integrated prep cycle 2023-2025, then Data & AI
  8. Sep 2022 - Jul 2023

    French Baccalaureate, Math & CS

    Institution Sainte Jeanne d'Arc, Dakar

    Highest honours

Projects & work.

df: 30 projects

By the numbers.

contributions.heatmap()

663

GitHub contributions, last 12 months

busiest day
40, Feb 26
longest streak
6 days
NovDecJanFebMarAprMayJunJulAugSepOctNov
lessmore
Language mix across my repos
  • Python34%
  • Jupyter Notebook18%
  • C#17%
  • Dart7.0%
  • CSS4.7%
  • Other18%

Each repo weighs the same, so one notebook can't drown the rest.

Project timeline

last sync: 14 Nov, 13:34 (api.github.com)

Kakoukaw.

Kakoukaw is my other half: the one who looks at the light before looking at the numbers. Streets, skies, faces, no filter on the curiosity.

@kakoukaw
Postcards series: Gorée Island, a palm-lined square between colonial facades
01APostcards, Gorée
Postcards series: the Mosque of the Divinity in Dakar under a deep blue sky
02APostcards, Dakar
Turning my friends into models, episode 2: a friend in a white shirt in front of a row of flags
03AFriends into models, ep. 2
Turning my friends into models, episode 1: portrait of a friend in a black beanie against a teal background
04AFriends into models, ep. 1
What I see vs what I take: a group of friends under a huge tree in the rain
05AWhat I see vs what I take
Episode 4, Black Panther: two silhouettes at a night bus stop under street lights
06AEp. 4, Black Panther
Portraits series cover: the Superman logo on a blue background, shot on iPhone
07APortraits, Superman

drag the film

Contact.

Got data piling up? Let's talk.

I am looking for a 24-month Data, ML & AI work-study (M1 & M2, 3 days at work, 2 at school), available now. If your team has more data than time to use it, we should probably talk. Research collaborations and odd data problems welcome too.