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Kristina MatrosovaKM

Kristina Matrosova

AI Product Engineer — ML · Full-stack · Infra

€500/day
Paris, FR
3-7 years

Average response time: 24 hours

Freelancer profile translated to English.
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About Kristina

5+ years of experience in product development, data, and ML.

AI Product Engineer & ML Engineer — I design and build data/AI products end-to-end, from specifications to production deployment. Hybrid full-stack profile: ML, backend, frontend, and infra.

With a computer science engineering degree, 4 years at Deezer on large-scale recommendation systems, and over a year building a complete B2B SaaS with an ML pipeline, I've developed a comprehensive understanding of what it takes for a data/AI product to truly work — not just in demo.

What I can do for you
  • Build a SaaS MVP from A to Z — from scoping to production, with no intermediaries
  • Integrate AI into your product: classification, analysis, generation, recommendation
  • Design and train ML models on your data (LLM fine-tuning, evaluation, serving)
  • Structure your data pipeline and data warehouse
  • Move fast with AI agents — without sacrificing quality
  • Minimize your cloud and inference costs from the design phase (GCP, Supabase, OpenAI…)

Why work with me
  • A single point of contact from business problem to delivered product — no ML / backend / infra silos
  • I understand your product trade-offs as well as your technical constraints
  • Autonomous across the entire stack — you don't need to manage me technically
  • I've already made the mistakes on a real product: I know where time is wasted and how to avoid it

For whom
  • Early-stage founders who want to ship an AI-powered SaaS MVP
  • Startups transitioning from POC to production product
  • Teams needing reinforcement in the data/ML area

Stack
  • ML & AI — LLM Fine-tuning · RAG · PyTorch · TensorFlow · scikit-learn
  • Backend & data — FastAPI · BigQuery · Supabase · PostgreSQL · event-driven pipelines
  • Frontend & product — Next.js · React · Vercel · Clerk · Stripe
  • Infra & cloud — GCP · Terraform · Docker · Cloud Run
  • French

    Native or bilingual

  • English

    Fluent

  • Russian

    Native or bilingual

Can work on-site
Paris (up to 10km)

Experience

  • Startup IA (stealth)
    Co-founder & CTO
    SOFTWARE PUBLISHING
    February 2025 - Today (1 year and 4 months)
    Paris, France
    Full development of an AI B2B SaaS, from design to production deployment.
    • End-to-end ML pipeline: LLM fine-tuning (OpenAI, Vertex AI), evaluation, dual-backend serving in production
    • Event-driven architecture on GCP, BigQuery data warehouse, 100% Terraform infra
    • Full product integrations: auth (Clerk), payments (Stripe), third-party webhooks (Lemlist, Customer.io, n8n)
    Fullstack LLM Google cloud Terraform Stripe
  • Deezer
    PhD
    November 2020 - December 2024 (4 years and 1 month)
    Paris, France
    Industrial thesis on music recommendation systems. Training and evaluation of ML models on large-scale streaming data.
    Python Data science Big Data Recommender Systems Machine learning
  • Deezer
    Backend Engineer
    April 2020 - October 2020 (6 months)
    Île-de-France, France
    Development of a Python/FastAPI backend service for importing user data from third-party platforms.
    Python FastAPI Docker Kubernetes

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Education

  • PhD in Computer Science - Recommendation Systems
    Université Sorbonne Paris Nord
    2024
  • Master in Computer Science - Data Exploration and Business Intelligence
    Université Sorbonne Paris Nord
    2020

Skill set

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