Yoann Le Garff
Senior Software & DevOps Engineer
36 years old
Driving License
Brest (29200) France
Professional Status
Employed
Open to opportunities
Senior Software & DevOps Engineer
Naval Group
Since July 2018
Full-time
France
- I'm currently working as a DevOps and Software engineer within a team managing a portfolio of software infrastructure projects in a Digital Factory, delivering source code and software artifacts that support and enable both enterprise and industrial information systems across the organization.
- I design, develop, evangelize, and define best practices for those incubating projects on a GitLab Ultimate stack.
- The projects include, for example:
- developing products, APIs, command-line tooling (written in Go, Python, nix shells, Powershell, and Vue.js for the frontend), including tools such as artifact transfer gateways, an SSH bastion, and others
- automated agents/bots (some backed by a LLM) mainly written in Go and Python
- migration tools
- internal specifications such as a disk images packaging format
- Ansible collections and roles
- Molecule drivers
- Kubernetes Operators (via the Operator SDK) for some of our products
- extensions for third-party systems such as Splunk modules, Nagios plugins, Packer plugins and so on
- Helm Charts and Docker Images
- Terraform and Kubernetes recipes
- developing products, APIs, command-line tooling (written in Go, Python, nix shells, Powershell, and Vue.js for the frontend), including tools such as artifact transfer gateways, an SSH bastion, and others
- All these projects are delivered and published through Continuous Delivery pipelines. Unit, integration, and end-to-end testing are central to our development practices.
- I also manage some services in production — Kubernetes clusters and Outscale (IaaS) tenants via Terraform — that support both software development workflows and automation subsystems such as Ansible AWX, artifact delivery gateways, underlying CI/CD runners, and more.
- Lastly, I provide support and advocate for DevOps practices and related tooling within the team. I also act as the primary reviewer for my teammates’ contributions.
DevOps & Cloud Consultant
Zenika
February 2017
to July 2018
France
- In collaboration with a team working on Enedis’s Linky project, I helped design and implement a Big Data ecosystem using technologies like Hadoop, Kafka, Spark, and Ambari. This was deployed and managed with tools such as OpenStack, OpenShift/Kubernetes, Ansible, GitLab, Jenkins, Docker, and more.
- Coding services + tests and associated GitLab CI/CD stuff. They were mostly written in Golang with some in Java (Spring Boot framework).
- Writing OpenShift recipes and managing clusters.
- Deploying applications on OpenShift and OpenStack tenants.
- Short consulting missions.
Software Developer
"on my free time"
Since 2014
- Extra-professional IT projects mainly done on GitHub.
DevOps Engineer
HOP! Air France (carried by Bluecom)
2015
to 2017
France
- Streamlining deployment and configuration processes using Puppet:
- architectural design
- architecture testing via Docker (+ compose)
- documentation
- definition and configuration of the testing and delivery chain (Git, CI/CD, r10k)
- development of Puppet modules and writing of recipes
- configuration management on more than 300 servers
- mentoring other engineers
- architectural design
- Introducing Continuous Integration (CI) using GitLab + GitLab CI + gitlab-multi-runner (utilizing the Docker executor) for specific applications.
- Log management using ELK:
- architectural design
- documentation
- mentoring other engineers
- architectural design
- Zabbix migration project from 2.0 to 3.0:
- architectural redesign
- architecture testing via Docker (+ compose)
- migration
- documentation
- architectural redesign
- Development of web services (Perl Mojolicious, Ruby Sinatra).
- Refactoring of a flight data collection application (written in C# with the ASP.NET framework).
System Administrator
DCNS (carried by Inetum)
2012
to 2015
France
- Administration and operational maintenance of the following tools:
- a monitoring stack including Nagios/Centreon, Sysload, Cacti, and Nagvis
- configuration management with Puppet (managing over 2000 servers across diverse operating systems)
- GitLab platform administration
- various mirror infrastructures
- file transfer solutions such as Axway and WAARP
- a monitoring stack including Nagios/Centreon, Sysload, Cacti, and Nagvis
- Development:
- Puppet modules
- Nagios plugins
- Perl libraries (clients) for BMC ControlM and Canopsis
- Centreon module (written in PHP5) for interfacing Centreon with Foreman-Facter
- Puppet modules
Skills
Development
-
Golang (CLI, backend, agents/bots, libs)
Advanced
-
Perl 5 (CLI, backend, libs)
Advanced
-
Python, NodeJS, Ruby scripting
Good
-
Web Development: Vue.js (frontend), Websockets, HTTP, APIs design (REST), OpenAPI, Golang, Mojolicious framework (Perl), Express (NodeJS)
Advanced
-
IDE: Visual Studio Code, vi
Expert
-
sh, Bash, Expect, Powershell scripting
Expert
-
Git (command-line), Git-based flows
Advanced
-
Social coding/software factories: GitLab & GitHub stacks
Expert
-
Flux, GitLab CI, GitHub Actions, Jenkins, Artifact Management (Nexus, Artifactory, OCI registries, ...)
Expert
-
Benchmarking (Tsung, Gatling, Vegeta, ...)
Advanced
-
Software packaging: make, OCI, Helm, Kustomize recipes, RPMs, PyPI, Perl CPAN, npm, Powershell modules, ...
Expert
-
Kubernetes Operator pattern (Operator SDK)
Advanced
Cloud & infrastructure
-
Dassault Outscale, AWS
Advanced
-
Openstack (deployment via Kolla and consumption)
Advanced
-
Cloud Init
Advanced
-
Virtualization: QEMU/KVM, Vagrant, VMware vSphere
Advanced
-
Kubernetes (vanilla, RKE2, K3s)
Advanced
-
Openshift
Intermediate
-
Podman, Docker, Docker Compose, Kaniko
Expert
-
Ansible, Molecule (e2e testing) and AWX
Expert
-
Hashicorp Terraform
Advanced
-
Hashicorp Packer
Expert
-
Terragrunt and Terratest
Good
-
Puppet
Advanced
-
Hashicorp Vagrant
Expert
-
Storage: RAID configuration, "On Linux" (FS, LVM), NFS, CIFS, S3, and Ceph (basics)
Advanced
-
Monitoring: Nagios, Centreon, Zabbix
Good
-
Observability: ELK & Grafana, Prometheus, Loki & Splunk
Advanced
Operating Systems
-
GNU/Linux (RHEL, Debian, Ubuntu, Alpine)
Advanced
-
Windows Server
Good
Identity and Middlewares
-
Keycloak (SAMLv2, OIDC, Oauth 2.0)
Advanced
-
LDAP protocol
Good
-
PostgreSQL (RDBMS, NoSQL, full-text search and Pubsub)
Advanced
-
MariaDB
Good
-
MongoDB
Advanced
-
ArangoDB
Advanced
-
Elasticsearch
Good
-
Redis
Advanced
-
Etcd
Intermediate
-
RabbitMQ (and the AMQP protocol)
Advanced
-
Apache Kafka
Intermediate
-
NGINX, Apache httpd, Microsoft IIS
Advanced
-
Apache Tomcat
Good
- Previous experience working with API gateways and service discovery mechanisms
-
Squid proxy
Advanced
-
HAProxy load balancer
Advanced
-
ACME tooling
Good
Networking
-
Ethernet, VLAN, L3 routing and filtering
Advanced
-
TCP/IP, HTTP
Advanced
-
Overlay networks (VXLAN), tunneling (IPsec, SSL, WireGuard)
Advanced
-
Remote access protocol such as SSH
Advanced
- Various protocols and associated tooling such as PXE, DHCP, SNMP, WMI, SMTP, ...
Team Process & Engineering Practices
-
Scrum (Agile)
Advanced
-
DevSecOps
Expert
-
Scrum Master role on a rotating basis
Advanced
-
Backlog Refinement
Advanced
-
Code Review & Peer Review
Expert
-
Tech mentorship
Advanced
-
Technical presentation/talk
Advanced
