Alyx Bersy
Former Senior Infrastructure Engineer @ Docker, Inc | Rails SWE, CTO and SysOps @ Selectra
Roubaix, Hauts-de-France, France | Remote worker
Summary
Self-taught engineer with 11+ years of professional experience. Eager to always learn more and more!
As a proud former member of Docker, I dedicated myself to architecting and maintaining Kubernetes-based infrastructure that powered our products, including the famous "Docker Hub". This role involved automating CI/CD processes, rethinking parts of our existing infrastructure, security, being on-call, and collaborating with internal teams to support their application deployment needs.
My work at Docker focused heavily on DevOps practices, utilizing tools like Terraform and AWS, as well as open-source solutions such as Grafana and Prometheus. Together, we built robust logging systems, metrics aggregators, tracing, and routing infrastructures that significantly enhanced engineering productivity, enabling rapid iteration from concept to deployment.
While my primary role was on the infrastructure side, I also had the opportunity to work on a large internal project for about eight months. This project aimed to improve engineer productivity by building a platform that made deploying new applications as straightforward as possible, tracking their status, and providing out-of-the-box solutions. The project was written in Go and involved integrating with Terraform, AWS, our own API backend using gRPC and Protobuf, and creating a user-friendly CLI experience.
Top Skills
Experience
Senior Infrastructure Engineer
Docker, Inc
Remote
- Designed and implemented advanced architectures for logging systems, routing infrastructure, metrics aggregators, and tracing using Grafana stack and AWS services
- Managed on-call shifts every six weeks (7 days), covering all services including follow-ups and post-mortem analyses
- Automated infrastructure processes including CI/CD pipelines for multiple complex workflows, creating reusable GitHub Actions
- Served as liaison to engineers, monitoring Slack channels to identify needs and provide proactive support
- Contributed as Go Software Engineer to internal developer platform aimed at increasing engineer productivity
- Implemented changes reducing CI/CD deployment waiting time by up to 20%
- Maintained close collaboration with security team, actively participating in incident training and investigations
SysOps Engineer
Selectra
Remote
- First SysOps Engineer, operated as "a team of one" with extensive documentation practices
- Created and managed Kubernetes clusters hosting ~50 applications (Ruby, Rails, PHP, Laravel)
- Created and managed AWS RDS Aurora MySQL and PostgreSQL clusters
- Implemented monitoring with Datadog and UptimeRobot
- Added distributed tracing observability through Datadog APM
- Traced Docker CI builds through OpenTelemetry Collector to Datadog and Honeycomb
- Managed SSL certificates through Kubernetes Ingresses with cert-manager
- Deployed CI/CD pipelines on SemaphoreCI using Docker, BuildKit and Kubernetes
- Managed cloud architecture with Terraform Cloud
- Added security layer with oauth2-proxy
- Migrated to DynamoDB for cache and sessions storage
- Deployed GitHub Codespaces to improve engineer onboarding and experience
CTO, Ruby & Rails Engineer, SysAdmin
Selectra
Paris, France
- Managed ~10 engineers (front-end and back-end)
- Improved hiring processes and managed engineer recruitment
- Shaped technical direction of the company
- Deployed runbook "How to Work At Selectra" with guidelines for distributed offices and remote workers
- Migrated ~50 monolith applications (PHP/Laravel/Ruby on Rails) from dedicated servers to cloud infrastructure
- Learned Kubernetes and AWS services to solve scaling issues during TV ads and high-traffic periods
Ruby on Rails Engineer
Selectra
Paris, France
- Integrated Twilio, TalkDesk, New Voice Media and Zoho CRM APIs
- Created webhook applications for CRM integration and large marketing operations
- Built automated callback application for call centers (~40k callbacks/month)
- Created business monitoring for callback application to track sales generation
- Built group purchase operation platform with automated retargeting (12k subscribers in 5 weeks)
Early Career & Self-Teaching
Junior Ruby on Rails Engineer (Self-teaching) - Apr 2014 - Jun 2014
Created nextepisode.io for TV show tracking with unit tests and ~100% code coverage, deployed on AWS Elastic Beanstalk
Junior Ruby Learner (Self-taught) - Oct 2013 - Jun 2014
Created extensible bot with plugin system, automatic updates, and dependency management
PHP Developer - ID Alizés - Jan 2013 - Mar 2013
Worked with internal "GSite" framework, reworked users and companies directory system
WordPress/Front-end Developer - Pillows Factory - May 2012 - Jul 2012
Created themes and plugins for WordPress, learned Foundation CSS framework
Education
Self-Taught
Computer Software Engineering (2013-2014)
BTS Services Informatiques aux Organisations
Lycée de la CCI Privée de Nîmes (2011-2013)
Solutions Logicielles et Applications Métiers (SLAM)
Baccalauréat Sciences et Technologies de l'Ingénieur
Lycée Dhuoda (2009-2011)
Spécialisation électronique