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Romain LaprayRL

Romain Lapray

Back-end Developer Ex-CTO

€790/day
Marolles-en-Hurepoix, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Romain

CTO in a Parisian startup for almost 3 years, I am looking for new adventures!

My main skills are in Java (Play! Framework), SQL (Postgresql) and analysis.

My management experience allowed me to go far beyond the technical aspect, to participate in product creation and operational commercial strategy... which ended up fascinating me with everything related to analytics and metrics (through the AARRR model) but also made me more aware of UX issues.

In terms of personality and method, I work in the most structured way possible within the given constraints. I am precise, reasonable, and direct in my communication.

My previous experiences have led me to work in companies of all sizes, on languages like C, from thick client to Java/SWING, including data integrators in pure SQL.

See you soon!
  • English

    Fluent

  • English

    Fluent

  • French

    Native or bilingual

Can work on-site
Marolles-en-Hurepoix (up to 50km), Paris (up to 10km)

Experience

  • See My Vet
    Co-founder CTO
    MEDICAL
    January 2020 - November 2021 (1 year and 11 months)
    Paris, France
    - Creation from scratch of a platform copying WhatsApp (video, audio, messages, images, videos...) specialized for vets.
    - 100% Infrastructure as Code: serverless, databases, CDN, CI/CD, video processing, logging, monitoring, config...
    - Development of a serverless framework for productivity: production-ready endpoint in 5 minutes, including tests.
    - Front-end respecting JAMSTACK principles: React + Redux with static export NextJS, served by CloudFront.
    - Facilitator of sprint planning, retrospective, backlog refinement, and daily stand-ups.
    - Product owner, but writing user stories with the other two non-technical co-founders.
    - Organization of testing campaigns
  • Carrefour - AUTRES
    Architect
    AGRICULTURE
    April 2019 - January 2020 (10 months)
    Massy, France
    - Responsible for the new Carrefour order management system.
    - Real-time order priority management with asynchronous production/consumption.
    - Orientation of the project architecture towards PaaS and containers.
    - Coordination of teams for data security.
    - Management of performance tests.
    Microsoft Azure PAAS PostgreSQL Java
  • Oui SNCF
    Senior Backend Engineer
    TRANSPORTATION
    April 2018 - April 2019 (1 year and 1 month)
    Paris, France
    - Work in self-managed feature teams responsible for their own domain, without a lead.
    - Production management on a micro-services infrastructure with high volume (3 million active users).
    - Refactoring of the Redis abstraction layer for all our micro-services.
    - Integration of external services with load management (back-pressure, response caching, request queuing) and advanced monitoring (dashboards, KPIs...)
    - Implementation of an infrastructure to manage user locations in near real-time.
    - Development of REST and websockets services.
    - Integration of a new authentication management system shared across all SNCF services.
    - SCRUM method with PO and SCRUM master for daily stand-ups, grooming, demos...
    Java Node.js AWS Lambda AWS MongoDB Spring Redis

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Education

  • Expert in Information Technology
    Epitech
    2012

Skill set

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