Freelancer profile translated to English.
Back to original languageAbout Julien
Fullstack developer specializing in IoT, I have solid experience in the design of connected objects, the creation of Web and Mobile applications, and the management of Cloud infrastructures. Passionate about innovation and embedded solutions, autonomous, resourceful, and proactive, I always strive to provide tailor-made solutions, understand and guide client needs, and take on new technical challenges. My self-taught background encourages me to stay constantly updated and continuously enrich my knowledge, while remaining rigorous in my work methods and organization.
🎯 Areas of Expertise:
Fullstack development (Node.js, React, TypeScript)
DevOps and Cloud Infrastructure (AWS, GCP)
Architecture and development of complete IoT solutions
💡 Mastered Technologies:
→ Backend: NodeJS, NestJS, Express, TypeScript
→ Frontend: React, Redux
→ Cloud: AWS (Lambda, EC2, S3, SQS), Google Cloud Platform
→ IoT: ESP32, Arduino, MQTT, Thingsboard
→ DevOps: Ansible, Terraform, Docker, Kubernetes
→ Databases: PostgreSQL, Redis, MongoDB, SQLite
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km)
Experience
- ZEWAYFullstack, Cloud and Embedded DeveloperTRANSPORTATIONApril 2021 - November 2024 (3 years and 7 months)Paris, France
- Maintenance of hundreds of Linux stations deployed in Europe, development of a solution with Node.js (Typescript), Redis, SQLite and Redux to communicate in real-time or in degraded mode by SMS
- Development of robust APIs (NodeJS, NestJS, Express, Redis, PostgreSQL) to manage real-time telemetry streams and critical alarms (Thingsboard, AWS SQS)
- Creation of web interfaces for station management and real-time dashboards with React and Websocket
- Automation with Ansible and Terraform to optimize deployment, cloud infrastructure monitoring, microservice updates, and ensure OS integrity on the station side
- Processing of critical data with AWS Lambda and AWS SQS, transformation of IOT data with AWS Glue, Python and Jupyter, storage of this data in AWS S3
- CozieFullstack and Embedded DeveloperFASHION AND COSMETICSMarch 2019 - October 2021 (2 years and 7 months)Paris, France
- Design and maintenance of a connected object solution for the cosmetics industry (Raspberry Pi, ESP32, SocketCAN, management of servo motors and stepper motors), running under Linux, Typescript and Python on the PC side and C++ and Espressif SDK on the microcontroller side
- Development of APIs with Node.js, MongoDB and Firestore for the integrity and updating of product databases
- Management of cloud infrastructures on Google Cloud Platform and Linux system administration
- Creation of web interfaces for real-time product and inventory management with Angular then React
Reviews
Emeric
Cozietic
Reviewed on 6/24/2019
Second mission with Julien. Very good experience: Julien is very attentive and very responsive.
Emeric
Cozietic
Reviewed on 5/17/2019
Very good relationship with Julien. He is flexible and attentive, and the work was completed on time. I would work with him again.
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Education
- Master 2 in Geography (Dynarisk)Pantheon-Sorbonne University Paris 12016
- SAPUI5 ConsultantFitec2017