Ralph Touma

Ralph Touma · ML Engineer & Data Scientist in Paris, France

I build machine learning systems that hold up outside the notebook.

Federated learning research at Green-Communications, plus production data and web products since 2023. Three AWS certifications in machine learning and generative AI.

See selected work Get in touch
Based in
Paris, France
Focus
Federated learning
Certified
3× AWS
Languages
French · English · Arabic

From first experiment to systems people rely on

01 · Summary

I'm Ralph Touma, a machine learning engineer and data scientist based in Paris. I turn ideas into working systems: clean data pipelines, models evaluated honestly, and products that keep performing once they meet real users.

My work spans machine learning research, forecasting, AI assistants and data products for real clients. Whatever the scale, I care about the same things: understanding the data, measuring what matters, and shipping something that holds up.

Selected work

02 · Projects & roles

2025

Personalized privacy-aware federated weather forecasting

Next-day forecasting across city-level clients on non-IID station data, benchmarked against centralized, local-only and FedAvg baselines with custom metric aggregation.

Federated learningFlowerForecasting
Case study → Project

Enterprise RAG assistant for technical documents

A retrieval-augmented generation system over PDFs and internal documentation, with hybrid retrieval, relevance ranking and citation-grounded answers.

RAGEmbeddingsVector search
Case study → 2025

Machine learning research at Green-Communications

Turning federated learning papers into testable systems for weather forecasting and heterogeneous distributed networks, with clustering, evaluation and performance analysis.

ResearchClustered FLEvaluation
Case study → Since 2023

Commerce engineering & analytics at BYND Network

Shopify storefronts and custom apps for more than 15 clients, plus the performance dashboards their teams use to track KPIs, with data analysis that lifted conversion by 30%.

ShopifyDashboardsConversion
Case study →

Experience

03 · Chronology

Ongoing

Paris · Remote

Freelance Full-Stack & AI Engineer

Independent

  • Design, build and ship full-stack web applications and websites end to end, from scoping and architecture to front end, back end, database, deployment and handover.
  • Build AI systems and autonomous agents for clients: LLM-powered assistants, retrieval-augmented generation over private documents, tool-using agents and workflow automation wired into existing products.
  • Own every client relationship directly, turning loose business goals into scoped technical plans, production code and measurable results.
  • Stack spans React.js, Vue.js, Node.js, Express, Python, SQL and MongoDB, with models and agents deployed on AWS and Azure.

July 2025 to November 2025

Paris, France

Machine Learning Research Intern

Green-Communications

  • Research and implementation in machine learning, federated learning and clustered federated learning, applying methods from scientific papers to real use cases including weather forecasting and heterogeneous distributed systems.
  • Data preprocessing, clustering, model evaluation, configuration generation and performance analysis, validating outputs against expected metrics and comparing results across experimental and training approaches.
  • Converting research insight and technical feedback into scalable, testable solutions: better experimental workflows, validated generated outputs, and components adapted to performance targets as requirements changed.

May 2023 to present

Jdeideh, Lebanon

Web Developer

BYND Network

  • Built and customised Shopify storefronts for more than 15 clients, developing scalable features with Liquid, JavaScript and the Shopify API.
  • Built performance dashboards for internal teams and clients, making KPI tracking faster and decisions more data-driven.
  • Developed custom Shopify apps and storefront features shaped around each client's operational requirements.
  • Applied data analysis to storefront behaviour and improved conversion by 30%.

Feb 2024 to May 2024

Adma wa Dafneh, Lebanon

Backend Developer Intern

Eurisko

  • Completed an intensive backend development bootcamp in JavaScript, TypeScript, Node.js, Express, MongoDB and RESTful API design.
  • Designed and tested REST APIs, structured MongoDB databases, and applied backend practices including modularity and error handling.

Feb 2023 to May 2023

Remote · Appen, San Francisco

Search Engine Evaluator & Data Collector

Appen (Freelance)

  • Evaluated the accuracy and relevance of search results returned by virtual assistants including Siri, Alexa and Google Assistant.
  • Extracted and classified business information from media sources, supporting structured data optimisation for AI training datasets.

Certifications

04 · Amazon Web Services

AWS Certified Generative AI Developer (Professional)

Amazon Web Services · Early Adopter · April 2026

Verify on Credly

AWS Certified Machine Learning Engineer (Associate)

Amazon Web Services · March 2025

Verify on Credly

AWS Certified AI Practitioner

Amazon Web Services · January 2025

Verify on Credly

Toolkit

Skills

AI & ML

PyTorch · TensorFlow · scikit-learn · LLMs · RAG · AI agents · Vector search

Languages

Python · TypeScript · SQL · R

Web

React · Vue · Node.js · REST APIs

Data & cloud

AWS · Azure · MySQL · MongoDB · Power BI

Questions people ask

05 · FAQ

Who is Ralph Touma?

Ralph Touma is a machine learning engineer and data scientist based in Paris, France. He completed a machine learning research internship at Green-Communications in 2025, working on federated and clustered federated learning, and has built web and data products since 2023 at BYND Network.

What does Ralph Touma work on?

He works on end-to-end machine learning: data preprocessing, model training and evaluation, federated learning, weather forecasting and retrieval-augmented generation systems. Alongside the research, he builds analytics dashboards and production Shopify storefronts for clients.

What experience does Ralph Touma have with federated learning?

During his research internship at Green-Communications (July to November 2025) he implemented federated and clustered federated learning methods from scientific papers on real cases such as weather forecasting and heterogeneous distributed systems.

Independently, he built a personalized privacy-aware federated weather forecasting system on Flower's simulation framework, benchmarking centralized, local-only, FedAvg and federated personalization approaches on non-IID station data with custom metric aggregation.

Which tools and technologies does Ralph Touma use?

Python, R, SQL, JavaScript, TypeScript, Java, C++ and C#; pandas, NumPy, scikit-learn, TensorFlow, PyTorch, Hugging Face, SageMaker and Jupyter; Power BI, Looker, matplotlib and seaborn; MySQL and MongoDB; React.js, Vue.js, Node.js, Express.js and REST APIs; AWS and Azure.

What certifications does Ralph Touma hold?

Three Amazon Web Services certifications: AWS Certified Generative AI Developer (Professional) (Early Adopter, April 2026, among the first 5,000 to earn it), AWS Certified Machine Learning Engineer (Associate) (March 2025) and AWS Certified AI Practitioner (January 2025).

Where did Ralph Touma study?

He is completing a work-study master's degree in computer science at the University of Paris-Saclay (2025 to 2026), a dual degree with Saint Joseph University of Beirut, where he is also completing a master's in data science (2024 to 2026). He holds a bachelor's degree in computer science from Notre Dame University (2021 to 2024).

Is Ralph Touma available for work?

Yes. He takes freelance projects building full-stack web applications, websites, AI systems and autonomous agents, and is open to machine learning roles and research collaborations in Paris. The fastest way to reach him is email at [email protected] or LinkedIn.

What languages does Ralph Touma speak?

French, English and Arabic.

Let's talk about the problem you're modelling

06 · Contact

Research collaborations, machine learning roles in Paris, or a data product that needs building: the fastest route is email.

Email

[email protected]

LinkedIn

linkedin.com/in/toumaralph

Location

Paris, France