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Ralph RomanosRR

Ralph Romanos

CTO / Architect - Backend / Data Engineering

€1,000/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Ralph

Backend Developer and Data Engineer for over 12 years, I have worked on numerous projects in various sectors (banking, finance, automotive, digital and programmatic advertising, marketing, energy, retail, web3 gaming...).
First employee of an online chess startup based on blockchain and NFTs, I contributed to building the entire technical stack for infrastructure and backend.
As an entrepreneur, I developed a technical solution for advertising monetization for web and application publishers in real-time bidding. This solution is now used by many press mobile applications (notably L'Equipe, 20 minutes, Ouest-France...) and handles over 10 billion auctions per month in real-time on the cloud.
Furthermore, my experience in a data consulting firm allowed me to build solid foundations in data engineering after being involved in a multitude of missions (big data, machine learning, data engineering, business intelligence). I was able to develop my skills in backend development (Java, Scala, Python), big data technologies (Spark, Hadoop, Cassandra...), traditional databases (SQL Server, PostgreSQL) and cloud platforms (AWS and Azure).
  • French

    Native or bilingual

  • English

    Fluent

  • Arabic

    Native or bilingual

  • Spanish

    Conversational

Can work on-site
Paris (up to 50km)

Experience

  • Immortal Game
    Technical Lead - Backend and Infrastructure Engineering
    ENTERTAINMENT AND LEISURE
    January 2022 - March 2024 (2 years and 3 months)
    Paris, France
    Built the backend and infrastructure of a Web3 Chess platform with unique NFT pieces, quests, tournaments, leaderboards and prize pools - Raised 15.5M$ in September 2022
    Node Typescript Apache Kafka Web3 ImmutableX Socket.io
  • Groupement Les Mousquetaires
    Technical Lead - Data Engineering
    RETAIL (LARGE RETAILERS)
    February 2021 - December 2021 (11 months)
    Paris, France
    Implementing a data pipeline on Azure to analyse receipts in real time in the retail industry
    Azure Azure SQL Database Azure Functions Azure Event Hub Azure Databricks Python Scala
  • ADMAX
    CTO & Cofounder
    PRESS AND MEDIA
    January 2019 - Today (7 years and 5 months)
    Paris
    Development from scratch and putting into production a real time bidding advertising monetization solution on leading French mobile applications : Ouest-France, 20 Minutes and L'Équipe yielding a revenue uplift of 100% (AWS infrastructure, >10B auctions/month)
    GO Amazon Web Services Kubernetes Apache Kafka Druid Android iOS Docker

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Education

  • Master's Degree
    University of Cambridge
    2012
  • Engineer's Degree
    Ecole Centrale Paris
    2012

Skill set

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