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I'm Sébastien Lataix, a software engineer and Lead Fullstack Developer specializing in Symfony, Node.js and React. I have over 8 years of experience designing and building complex, scalable web applications. I design domain-driven, hexagonal and multi-tenant architectures, mentor teams through code reviews and pair programming, and integrate AI to optimize development and align with business needs. A former math teacher, I bring rigor, pedagogy, and a strong culture of documentation, transparency, and effective communication with product and business stakeholders.…I'm Sébastien Lataix, a software engineer and Lead Fullstack Developer specializing in Symfony, Node.js and React. I have over 8 years of experience designing and building complex, scalable web applications. I design domain-driven, hexagonal and multi-tenant architectures, mentor teams through code reviews and pair programming, and integrate AI to optimize development and align with business needs. A former math teacher, I bring rigor, pedagogy, and a strong culture of documentation, transparency, and effective communication with product and business stakeholders.

Sébastien Lataix

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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I'm Sébastien Lataix, a software engineer and Lead Fullstack Developer specializing in Symfony, Node.js and React. I have over 8 years of experience designing and building complex, scalable web applications. I design domain-driven, hexagonal and multi-tenant architectures, mentor teams through code reviews and pair programming, and integrate AI to optimize development and align with business needs. A former math teacher, I bring rigor, pedagogy, and a strong culture of documentation, transparency, and effective communication with product and business stakeholders.…I'm Sébastien Lataix, a software engineer and Lead Fullstack Developer specializing in Symfony, Node.js and React. I have over 8 years of experience designing and building complex, scalable web applications. I design domain-driven, hexagonal and multi-tenant architectures, mentor teams through code reviews and pair programming, and integrate AI to optimize development and align with business needs. A former math teacher, I bring rigor, pedagogy, and a strong culture of documentation, transparency, and effective communication with product and business stakeholders.

Available to hire

I’m Sébastien Lataix, a software engineer and Lead Fullstack Developer specializing in Symfony, Node.js and React. I have over 8 years of experience designing and building complex, scalable web applications.

I design domain-driven, hexagonal and multi-tenant architectures, mentor teams through code reviews and pair programming, and integrate AI to optimize development and align with business needs. A former math teacher, I bring rigor, pedagogy, and a strong culture of documentation, transparency, and effective communication with product and business stakeholders.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Work Experience

Lead Symfony Developer at MyUnisoft / École Futée

February 1, 2025 - Present

Led a from-scratch refactor of the SaaS platform for school administration using Symfony 7 with DDD, hexagonal and event-driven architecture. Designed and implemented a multi-tenant architecture (one database per school with dynamic connections). Managed technical mentoring, code reviews and best practices dissemination. Integrated AI for data analysis and assisted development tasks. Implemented Symfony Messenger and RabbitMQ for asynchronous processing (bulk emails, notifications, deferred jobs). Optimized performance with Redis and secured APIs behind an API Gateway (Gravitee). Established and automated unit tests within CI/CD pipelines.

Symfony & React Developer at ENEDIS

February 1, 2024 - December 31, 2024

Developed a Symfony backend exposing secure REST APIs for tickets and interventions. Designed and built a React frontend using Material UI. Implemented a dynamic drag-and-drop Form Builder (Formik, Yup) to create forms without developer intervention. Managed user roles, secured data flows and performance optimization. Contributed to CI/CD with GitLab.

Lead Symfony & React Developer at SUPPLAY

December 1, 2021 - December 31, 2023

Technical leadership of a team of developers; internal application for missions, contracts and schedules (React frontend, Symfony backend). Designed modular Symfony API on hexagonal architecture for SI interconnection. Implemented RabbitMQ for asynchronous messaging (emails, push notifications, SMS) and an API Gateway. Established GitLab CI/CD, code reviews and backend best practices (caching, unit tests) to improve scalability.

Lead Developer & CTO at BoostMyBet

September 1, 2020 - December 31, 2021

End-to-end backend Symfony for real-time sports data (aggregation from external APIs). Implemented a real-time system using Server-Sent Events (SSE) for live scores and stats. Frontend in React for a real-time UI. Developed advanced statistical analysis tools to aid bettors. Collaborated with the incubator Innovact to refine product strategy and respond to user feedback. Tuned performance and scalability for large data throughput.

Symfony & React Developer at Snap-GT

February 1, 2020 - September 30, 2020

Developed backend in Symfony connecting platform to ERP and automating data exchanges. Frontend in React for a modern B2B interface. Documented REST APIs (e.g., for DafyMoto) to facilitate external service integration. Implemented code organization best practices and digitalized business processes.

Symfony & React Developer at My Urban Experience

January 1, 2018 - December 31, 2019

Developed backend features for reservations, users and activities; created and improved REST APIs; contributed to React UI with focus on user experience and consistency across screens; supported the e-commerce platform modernization and reliability.

Fullstack Developer (PrestaShop) at 1001Hobbies

January 1, 2018 - December 31, 2019

Developed custom PrestaShop modules, integrated APIs and third-party services, and enhanced UI to improve navigation and conversion; optimized performance and stability of the e-commerce platform.