Freelancer profile translated to English.
Back to original languageAbout Daniel
Hello, I'm Daniel 👋
💻 Full-stack developer and digital consultant with a background atEPITECH**, I am passionate about developing mobile and web applications. Enriched by international certifications from **HEC Paris🇫🇷 andChung-Ang University in Seoul🇰🇷, I bring comprehensive expertise from development from scratch to production.
🔧 Technical Skills:
Languages & Frameworks: React, React Native (CLI & Expo), TypeScript, JavaScript, Node.js, Express, NestJS, PHP / Symfony, Firebase, Supabase.
Databases & ORMs: PostgreSQL, MySQL, MongoDB, Prisma, Doctrine.
Architectures & Best Practices:
- Clean Code: SOLID principles, single responsibility, readable, testable, and maintainable code.
- Clean Architecture
- Microservices
Quality & Performance: Unit/Integration tests, CI/CD, performance optimization, monitoring, adherence to security principles.
UX / UI & Product: User-centered design, smooth experience, responsive, UI optimization for mobile and web.
💡 Why Choose Me?
4+ years of Full-Stack & React Native Experience
Product & Business Approach thanks to my HEC Paris training
Agile Methodologies: automated tests, continuous integration, robust and maintainable code
Optimal UI/UX Design for a smooth and intuitive user experience
🚀 Services Offered:
Design & development of iOS & Android applications from scratch with React Native (Expo / CLI)
Development of complete web platforms / SaaS
Integration of payments (Stripe Connect, RevenueCat SDK), dashboards & real-time modules (notifications, synchronization, WebSockets)
Integration of AI / external APIs, advanced features based on product needs (OpenRouter, etc.)
📈 The Extras:
Free quoteand personalized advice
Available and responsive,response guaranteed within 1 hour
Ready to bring your project to life?
French
Native or bilingual
English
Fluent
Romanian
Conversational
Remote only
Primarily works remotely
Experience
- Wise BuildingFront-end VueJS Developer / Back-end NodeJS - NestJS DeveloperREAL ESTATESeptember 2024 - September 2025 (1 year)Paris, FranceAll-in-one platform that centralizes office management, reservations, digital badges, and services to simplify employees' lives in commercial buildings.- Development of a digital badge platform that digitizes physical badges for Apple Wallet and Google Wallet, using design patterns to abstract multiple providers (HID, STID) and ACS platforms (TIL Microsésame, Vauban Systems).- Development of a NestJS webhook engine that normalizes badge lifecycle events from multiple badge and access control providers using proven design patterns, allowing for "plug-and-play" addition of new providers.- Integration of a high-performance metrics system processing over 2 million access events/year, combining HyperLogLog (<1% error) and bitmaps for tracking physical/digital badge usage powered by Redis.- Development of a reusable calendar synchronization library that maintains reservation functionality consistency with Outlook and Google Calendars.- Automation of origin-aware CORS for each endpoint via AWS CDK and API Gateway VTL templates.- Improvement of code quality with Vitest by standardizing the Arrange-Act-Assert pattern.
- SmartnanceBack-end PHP Symfony Developer / React-Native Mobile DeveloperCIVIL ENGINEERINGSeptember 2024 - September 2025 (1 year)Paris, FranceDigital maintenance management platform that helps managers optimize the upkeep, energy consumption, and budgets of commercial buildings.-> Migration from Symfony v5 to v6 LTS, PHP 7.3 to 8.3, Doctrine ORM v2 to v3, MariaDB to PostgreSQL.-> Migration from a multi-database multi-tenant architecture to a single-database multi-tenant architecture via PostgreSQL RLS-> Migration from Docker file system usage to AWS S3 with firewall based on AWS CloudFront signed cookies.-> Migration of the messenger for asynchronous operations from Redis worker to AWS SQS-> Development and integration of an API for a React-Native "offline-first" mobile application with local file management and an image upload queue via FS/MMKV and Redux.
- RECamilyReact-Native / Firebase DeveloperSOCIAL NETWORKSDecember 2022 - January 2023 (1 month)Lyon, FranceInitialization of a boilerplate and development of main features-> Authentication with Firebase Auth-> Management of recording, importing, and listening to Audio files with Expo AV-> Storage of audio and image files on Firebase Storage
Reviews
Tiffanie
Tiffanie
Reviewed on 12/29/2022
Daniel is talented and very professional! I really appreciated our collaboration because he is fast and efficient. He quickly understands needs and knows how to find technical solutions. I highly recommend him.
Florian
Programisto
Reviewed on 9/26/2022
Serious and attentive!
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Education
- Information Technology ExpertEPITECHFormation et professionnalisation sur de nombreuses technologies à travers une pédagogie par projet Compétences : C (langage de programmation) · C++ · Développement de systèmes informatiques · Gestion de projet logiciel · Leadership d’équipe · Entrepreneuriat · Auto-apprentissage
- Master 1 (M1), Programming / Computer Developer, Computer EngineeringChung-Ang University
Certifications
- Information Technology ExpertEPITECH
- Digital Entrepreneurship CertificateHEC Paris2023