David Lecoin
I’m David Lecoin, a senior software engineer with 6+ years of experience building full-stack products end to end—from architecture and clean, maintainable code to production deployment.
About
I’m David Lecoin, a senior software engineer with 6+ years of experience building full-stack products end to end—from architecture and clean, maintainable code to production deployment. I specialize in TypeScript, React, and Node.js, and I’ve delivered SaaS platforms, mobile applications, and websites with a strong focus on scalability, documentation, and team collaboration.
I enjoy turning complex requirements into reliable systems, whether that’s designing modular backend services, implementing GDPR-friendly data workflows, or improving observability and internationalization. I also value Agile practices, code reviews, mentoring, and shipping meaningful features—so products stay understandable, evolvable, and ready for real users.
- 5 years' experience
- Joined October 2026
Industry experience
- Software & Internet
- Transportation & Logistics
- Retail
- Energy & Utilities
Work experience· 7 roles
Developed a travel guide SaaS from scratch to production, covering architecture, implementation, and deployment. Designed a modular backend architecture using Nx and Fastify microservices with an emphasis on scalability, separation of concerns, and maintainability. Standardized API development with strongly typed DTOs, Swagger/OpenAPI documentation, and structured technical documentation in Notion. Established Agile practices, led code reviews, and mentored developers to improve code quality and collaboration. Supervised a software development apprentice through onboarding and ongoing technical support.
Built automated user data anonymization workflows using scheduled CRON jobs to support GDPR compliance. Developed a user commenting system, including comment management and integration into the application. Upgraded and maintained Android and iOS mobile applications to ensure compatibility with evolving platform requirements.
Designed and developed a supplier management application supporting business operations and internal workflows. Built and integrated interactive dashboards to visualize business data and operational metrics. Improved usability and navigation with interfaces tailored to operational teams. Deployed web and React Native mobile applications to contribute to end-to-end software delivery.
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