Guillaume CERNIER

Currently working
@

Passionate and with 17 years of experience focused on backend, architecture and design, I enjoy continuously learning and sharing knowledge about best practices, quality, scalability and other related challenging topics.

Tech skills and interests:
🧩 Backend software engineering (with also interest in full-stack one), APIs, micro-services architecture, whatever the underlying tech stacks. With higher experience on Java (incl. related frameworks like Spring) and Python ecosystems ; also always self-learning other kinds, from compiled to interpreted languages, static to dynamic ones, etc…

☁️ Cloud computing (Docker/Kubernetes, AWS, GCP, Azure, etc.)
⚙️ CI/CD toolings and processes
🔂 DevOps / 🫴 SaaS mindsets
✅ Quality focus

Education

MSc in Computer Science, 2007

ENSIMAG (Grenoble INP)

Tech stacks

Java / J2EE

Quarkus

Docker

Python

Maven & Gradle build tools

REST / JSON APIs

JavaScript frameworks

ElasticSearch

Groovy / Grails

Git through GitHub, BitBucket
and other versioning systems

Spring

Hibernate

Kubernetes

SQL/NoSQL data-sources

Clouds (GCP, AWS, Azure, etc.)

OpenAPI

GraphQL

Kafka

Vaadin

(self-learning)
Kotlin / Go / Ruby

Experience

Senior Software Engineer

Amadeus

August 2024 – Present Villeneuve-Loubet, Nice area, France 🇫🇷

In the « Engineering Experience » unit, we do our best to both simplify the life of other software engineers in Amadeus and, at the same time, make them confident in the code they push to production.

Principal Software Engineer

Semarchy

February 2023 – August 2024 Nice / Lyon, France 🇫🇷

Semarchy is a leading and growing provider of unified data platform enabling any kind of company to maximize business value from its ever-increasing amount of data.
And, being the #1 tech member hired in the team, I worked on a strategic and innovative product of this platform, named « Data Intelligence » and offering data catalog/governance capabilities.

Senior Software Engineer

LivePerson

May 2022 – January 2023 remotely, Nice, France 🇫🇷

Build foundations of a new CQRS-based microservices architecture.

Software Engineer

Amadeus IT Group

March 2013 – May 2022 Sophia-Antipolis, Nice area, France 🇫🇷

2021 - 2022: « Cytric » Travel & Expense Management solution

Progressive and complete migration of the solution’s backend services from legacy to brand new and state-of-the-art architecture aiming at better scalability, performance, quality, development/release practices, etc.
2016 - 2021: « Amadeus for Developers » portal

New generation of portal enabling any developer worldwide to build its own application using Amadeus APIs.
2011 (first as a consultant) - 2016:

Development of an « extensibility framework », on the PaaS (Platform-as-a-Service) model of cloud computing, enabling customization of existing e-Commerce Amadeus products.