Jonny Saykosy

LinkedIn | GitHub | Portfolio | Paris, France | josayko@pm.me

Fullstack Developer / Software Architect

I am a passionate developer with a specialization in backend development and software architecture. With expertise in TypeScript, Node.js, and Kubernetes, I thrive in dynamic environments where I can design technical solutions tailored to the needs of end-users and industry professionals. My focus is on creating scalable SaaS platforms, optimizing performance, and ensuring robust deployment practices for various sectors.

Professional Experience

Web Developer

Sofya (Vertical Sea Group) Paris, France — September 2022 - January 2025

  • SaaS Platform Development: Built a SaaS platform for real estate construction professionals, including features such as document management (GED), visa tracking, and digital twin visualization (BIM).
  • Architecture Migration: Led the migration from a monolithic JavaScript architecture (Loopback) to a microservices architecture in TypeScript, achieving a 20% increase in load speed and modularity.
  • System Design & Optimization: Integrated Clean Architecture and Domain-Driven Design principles for optimal feature structuring.
  • Real-Time Communication: Created a real-time messaging system with WebSockets and Socket.io, supporting communication for 9000+ active users.
  • Frontend Upgrades: Maintained and updated the frontend using Angular, transitioning from Angular 11 to Angular 18 to improve responsiveness and accessibility.
  • Deployment & Infrastructure: Managed and optimized Kubernetes clusters for 99.9% platform availability. Automated CI/CD processes with GitHub Actions and Docker on OVH Cloud.

Sales Consultant

J.M. Weston, Fontana, Mariage Frères Paris and Tokyo — 2014 - 2019

  • Worked as a luxury sales consultant, enhancing skills in client management and cross-cultural communication.

Education

  • Bachelor’s Degree in Computer Science - Conservatoire National des Arts et Métiers (CNAM) September 2022, Paris, France

  • Digital Technology Architect - École 42 November 2019 - October 2022, Paris, France

  • Python Django Application Developer (RNCP Level 6) - OpenClassrooms August 2021 - June 2022

  • Associate’s Degree in Japanese Language and International Business - INALCO September 2010 - June 2013, Paris, France

Technical Skills

  • Backend: TypeScript, JavaScript, Node.js, Express
  • Frontend: Angular, Vue.js, Nuxt, TailwindCSS
  • Architecture & DevOps: Microservices, Clean Architecture, Domain-Driven Design
  • Deployment & Infrastructure: Docker, Kubernetes, CI/CD (GitHub Actions), OVH Cloud, AWS
  • Databases: MongoDB, PostgreSQL
  • Tools: Git, Linux, GitHub

Languages

  • French: Native
  • English: TOEIC 900
  • Japanese: JLPT N3

Interests

Beyond programming, I have a strong passion for martial arts, especially traditional karate. I’m also a retro video game and vinyl record collector, with a keen interest in personal finance and continuous learning.

You can connect with me on LinkedIn and view my projects on GitHub .