Freelancer profile translated to English.

Description

Alexandre Cailler - The engineer who turns chaos into elegant code

Fullstack developer passionate about impossible technical challenges and a fervent believer in the principle "if it works, it's not complicated enough." Specialist in transforming monolithic applications into multi-tenant architectures (because why do it simply when you can do it scalably?).

His superpower: Migrating non-relational databases to relational ones while keeping a smile, and transforming legacy infrastructures used by 5.5 million users without anyone noticing. A true refactoring wizard.

Work philosophy: A convinced practitioner of LEAN ("90% of what we do is waste" - his favorite quote), he has a pragmatic approach to development where efficiency prevails over unnecessary complexity. A follower of "No Estimate" and extreme lean programming, he prefers to deliver rather than speculate.

Technical stack: Technological polyglot mastering Vue.js as well as Symfony, Terraform as well as Kubernetes, with a tendency to migrate everything to Google Cloud Platform. Docker enthusiast and heavy user of Gitlab CI/CD, he automates everything that can be automated.

Specialties:

- Capable of managing the Hellfest infrastructure (180,000 people in one day, no less!)

- Designer at heart with a "great appetite" for Figma

- Former violinist turned scuba diver (successful career change from music to the depths)

- Globetrotter who has visited more countries than JavaScript frameworks

Secret quote: "Push to master after testing, obviously... well, most of the time."

Currently co-founder at France Nuage and always ready to transform your IS into scalable SaaS, while keeping his feet on the ground and his head in the cloud.

P.S.: If you're looking for someone to redo your architecture 4 times like for Todoworld, he's your man (but he's not proud of it)!

Industry field of expertise

Languages

French
Native or bilingual
English
Conversational

Workplace preferences

Can work on-site

Nantes (up to 50km), La Rochelle (up to 10km), Rochefort (up to 10km), Paris (up to 10km), Rennes (up to 10km)

Mihari
Full Stack Developer
SOFTWARE PUBLISHING
June 2025 - Today (1 year)
Nantes, France
Project currently on hold, still in product design and iteration.

This is a unified API alerting, monitoring, and documentation platform, designed to centralize often dispersed uses across multiple tools. The goal is to offer a coherent and integrated experience, midway between Better Uptime and ReadMe, by combining technical observability and developer documentation in a single product.

The solution allows for service supervision, metric collection, log centralization, alert definition, and maintaining API documentation synchronized with technical environments. The product approach aims to reduce the fragmentation of DevOps tools while improving system visibility.

On the technical architecture side, the platform relies on ClickHouse for big data analysis and PostgreSQL for application data. Services are developed in Node.js and Laravel, with a frontend interface in Nuxt and Tailwind.

The infrastructure is deployed on Scaleway, containerized with Docker, and orchestrated via Kubernetes. Deployment pipelines are automated using GitLab CI/CD.

Observability relies on OpenTelemetry, Vector (Datadog), and Prometheus for metric collection. Real-time notifications and alerts are managed via Twilio.

The project is designed to be modular, scalable, and developer-oriented, with a strong emphasis on reliability, system readability, and information centralization.
Node.js PostgreSQL Laravel Clickhouse
BIG - Business Is a Game
Full Stack Developer
SOFTWARE PUBLISHING
February 2025 - February 2026 (1 year)
Nantes, France
I am currently developing a comprehensive SaaS platform for sales teams, designed to simplify connections between companies, freelancers, and business introducers (sales), while integrating clear and automated invoicing management between the three parties.

The application is based on a modern and robust architecture. The backend is developed in Rust to ensure performance, security, and reliability for critical operations such as transaction and commission management. The frontend is built with Nuxt, offering a fluid, responsive, and user-experience-oriented interface.

The platform uses a PostgreSQL database to ensure data consistency and manage complex relationships between users, missions, and payments. Technical supervision is provided by Grafana, allowing real-time monitoring of application metrics and infrastructure to anticipate incidents and maintain a high level of availability.

Deployment and continuous integration are automated using GitLab CI/CD, ensuring reliable and fast production releases. Payment and invoicing management is handled by Stripe, automating financial flows between companies, freelancers, and sales representatives.

This project is part of a global product design approach: software architecture, user experience, DevOps automation, and observability. The goal is to create a reliable, scalable tool focused on the real needs of modern sales teams.
PostgreSQL Git CI/CD Management Database Management Rust
BIG - Business Is a Game
Investor
TECH
February 2025 - Today (1 year and 4 months)
Nantes, France
The platform for sales! Have you already found a platform for business introducers and dedicated to sales?

BIG is a platform that connects business introducers, freelancers, and companies.