Hi, I am Stella Cao,

a Full Stack Developer

I work with...

  • Programming Languages : Ruby, Python, JavaScript, SQL, HTML, CSS
  • Frameworks & Libraries
    • Backend : Ruby on Rails, Flask, Node.js
    • Frontend : ReactJs, NextJs, jQuery
    • UI Components : Material UI, Bootstrap
  • Web Technologies : REST APIs, Webhooks
  • Machine Learning : Supervised learning, Decision trees, scikit-learn, pandas
  • Databases & Caching : MySQL, PostgreSQL, SQLite, Redis, Elasticsearch, Memcached
  • Cloud & Hosting Services : AWS, GCP, Firebase, Vercel
  • DevOps & Virtualization : Docker
  • Testing Tools : RSpec, pytest
  • Operating Systems : macOS, Windows

What I've done

Apr. 2021 – Present

Full Stack Developer – Nuxos Publishing Technologies | Full Remote

  • Advanced Search & Filtering System
    • Designed and developed a scalable search service with ElasticSearch, exposed via a Python REST API
    • Improved front-office search for ebooks, authors, collections, categories, leading to a 30% increase in search-to-purchase conversion rate
    • Implemented back-office search for orders, customers, and catalog data, reducing operational workload by 40%.
  • Natural Language Processing (NLP) Services
    • Built a custom NLP service achieving 92% sentiment classification accuracy
    • Enhanced personalized recommendation algorithms using sentiment and topic analysis, resulting in a 15% increase in CTR and a >10% reduction in returns
    • Automated the detection of negative feedback trends, cutting customer support response time by 30%
  • Automation & Workflow Optimization
    • Implemented scalable background jobs systems using Sidekiq and Redis to automate order workflows, data updates, and notifications
    • Improved system resilience through ActiveJob abstraction and scheduled tasks via the whenever gem
  • Platform Expansion
    • Designed and implemented core platform features that led to a 25% increase in publishing partner adoption
    • Improved usability and tailored interfaces for diverse publisher needs
  • Web Development for Major Publishers
    • Developed 60+ websites and mini-sites for brands including Hachette Livre, Eyrolles, Piktos, Leduc,... using Sass, Bootstrap to ensure scalable, maintainable codebases
    • Delivered fully responsive, high-performance UIs tailored to each client's brand guidelines, with seamless CMS integration
    • Create dynamic, interactive components with jQuery, leading to a 20% increase in average session duration and improved user engagement across device
Oct. 2018 – Oct. 2020

Software Developer (Apprenticeship) - Estimancy | Paris

  • Estimation Workflow Development
    • Designed and implemented dynamic user interfaces that simplified complex estimation workflows and improved accessibility
    • Enhanced user interaction through intuitive UI components, supporting flexible estimation scenarios
  • Backend Engineering & Algorithm Optimization
    • Developed and optimized backend services to ensure robust data processing and accurate approximation algorithms
    • Implemented data pipelines that handle uncertain and incomplete inputs while maintaining system reliability
  • Agile Collaboration & DevOps
    • Worked within a cross-functional agile team, contributing to sprint planning, code reviews, and feature development
    • Utilized Git version control and integrated CI/CD pipelines to streamline deployment and maintain high code quality

Where I learned

Master’s Degree in Software Architecture
  • Work-study program | Sept. 2018 – Sept. 2020
  • École Supérieure de Génie Informatique (ESGI) – Paris
Bachelor’s Degree in Computer Science
  • Sept. 2014 – May 2018
  • Sorbonne Université UPMC – Paris
French Scientific Baccalaureate – with Honors
  • Graduated 2014
  • Nguyen Dinh Chieu High School – Vietnam

I speak...

Vietnamese
Native
French
C1
English
C1

Let's connect !