Térence Chateigné

Térence Chateigné

👋
Hi ! I'm a 27 y/o SRE currently working at DejaBlue in Paris. I'm currently tinkering with Go, Kubernetes and NixOS.

👨🏻‍💻 Work experience


Software Engineer @ DejaBlue

Paris, France – (June 2025 - Present)
Full-time
🔌
DejaBlue is a unified electrification platform for EV charging.
I am a contributor specialized in infrastructure and backend related tasks in the engineering team.

Lead Site Reliability Engineer @ Theodo Cloud

Paris, France – (Feb 2021 - May 2025)
6 mo. internship ⇒ full-time
☁️
Theodo Cloud is a team of infrastructure experts. Theodo Cloud will help you from architecturing your business in the cloud to ensuring it stays up 24/7.

Projects

During my time at Theodo Cloud, I have participated in ~15 client projects of varying size, including :
  • Completing a full migration from on-prem to AWS of a large ecommerce SaaS
    • Created 5 new AWS environments and a hub-and-spoke network using AWS transit gateway and Terraform / Terragrunt
    • Synchronized 8 heavily used multiple TB databases using CloudNativePG operator on EKS
    • Deployed 200+ applications on 5 Kubernetes clusters using ArgoCD
  • Maintaining the AWS infrastructure of a public investment bank
    • Creating GitLabCI pipelines and AWS resources to help ~15 developer teams deploy new features
    • Continuous update and maintenance of 8 Kubernetes clusters
    • Migrating 4 Kubernetes clusters to GitOps deployment using ArgoCD
  • Creating a landing zone for the AWS migration of an airline company
    • Deployed AWS Control Tower and AFT to provision dozens of feature accounts using Terraform
    • Created a hub-and-spoke with on-prem connectivity using AWS Transit Gateway and AWS Site-2-Site VPN
    • Provisioned support resources (Route53 zones, certificates, lambda layers) to ~5 serverless developer teams
I have developed my current skillset during these missions.

Role

As a Lead SRE at Theodo Cloud, my responsibilities revolve around client projects. For each project, my tasks include:
  • Defining measurable objectives to assess the project's success
  • Creating and maintaining a roadmap outlining all the technical tasks needed to achieve the objectives
  • Refining the targeted architecture designed during the project’s sale
  • Detailing each technical task with its steps and acceptance criteria
  • Leading a team of 1-2 SREs to complete the technical tasks
  • Regularly attending meetings with the client to discuss the roadmap / objective and assess of its success.

Contributions

In addition to my projects and role at Theodo Cloud, my other contributions include:
  • Authoring multiple articles in Theodo Cloud’s tech radar
  • Creating and teaching a Zero Trust networking course
  • Developing guacamole, an open-source Terraform / Terragrunt code quality assessment tool
  • Coaching colleagues on their career progression at Theodo Cloud
  • Helping Theodo Cloud obtain its ISO27001 / HDS certification by being reponsible of a part of the ISO27001 perimeter.

Full-stack Developer @ Pricemoov

Paris, France - (Sep. 2019 - Jun. 2020)
6 mo. internship ⇒ 3 mo. freelance
💰
Pricemoov helps you grow your sales by optimizing your pricing strategy.
At Pricemoov, my primary tasks included:
  • Implementing new frontend and backend features for Pricemoov's product using React.js and Django.
  • Creating pricing data pipelines using Dataiku DSS and SQL.
  • Setting up web crawlers to gather pricing data using Python and Scrapy.

Full-stack Developer @ Idemia

Issy-les-Moulineaux, France (Apr. 2018, June 2018)
Internship (2.5 months)
🆔
Idemia builds identity and security technologies.
At Idemia, my primary tasks included:
  • Developing a web application to interface with an ID document authentication server using computer vision using Node.js
  • Integrating various identity sensors (finger, face, and signature scans) into a demonstration app using C#

🤹🏻‍♂️ Skills


☸️ Kubernetes
  • Expertise in AWS EKS
  • Autoscaling with Karpenter
  • GitOps deployment with ArgoCD
🐳 Containers
  • Image and Docker Compose config
  • AWS ECS / Google Cloud Run
  • Multi-stage image build
 
☁️ AWS
  • Hub-and-spoke network
  • Control Tower, SSO and Organizations
  • Managed services (S3, EFS, Elasticache, AmazonMQ…)
🏭 Infrastructure
  • Expertise in Terraform
  • Module & layers architecture with Terragrunt
📊 Observability
  • Prometheus / Grafana
  • ElasticSearch / Kibana
  • Datadog
🚀 CI/CD
  • GitLabCI pipelines
  • GitHub Actions pipelines
  • Integration of cloud provider IAM
⌨️ Development
  • Go
  • JavaScript
  • Bash
  • Python
 
🐧 Linux
  • NixOS
  • Arch
  • Ubuntu
  • Debian
💾 PostgreSQL
  • AWS RDS
  • CloudNativePG operator
 
Some open-source projects I’ve contributed or developed :
  • nixos-config : Configuration files for all my NixOS computers
  • tailout : Tool to create a VPN on any AWS region with Tailscale

📜 Certifications


☸️ Certified Kubernetes Administrator - June 2021 (expired)

🎓 Education


Engineering degree in Computer Science @ UTC

Compiègne, France (2018 - 2021)
Major : Networks and Systems
Courses : algorithmics, statistics, web development, cyber-resilience, data visualization, networks, databases
Volunteering : backend development of the 2019 edition’s website of the Imaginarium Festival

University degree in Computer science @ IUT Villetaneuse

Villetaneuse, France (2016 - 2018)
Major : Advanced Mathematics
Courses : algorithmics, optimization, databases, web development, OOP, economics
Sports : Won team 3rd place at the 2018 archery national university championship

Baccalauréat in Sciences @ Lycée Pissarro

Lycée Camille Pissarro, Pontoise, France (2012, 2015)

🗒️ Articles


My contributions to Theodo Cloud’s technical blog.
 

🗣️ Languages


French 🇫🇷

Native speaker

English 🇬🇧

Fluent

Spanish 🇪🇸

Proficient speaker