Jean-Sebastien is available for hire

Jean-Sebastien Trille

Verified Expert in Engineering

DevOps Engineer and Developer

London, United Kingdom

Toptal member since June 22, 2022

Expertise

AWS Kubernetes AWS RDS Ansible Python Elasticsearch Golang

Bio

Jean-Sebastien is a senior site reliability engineer and a DevOps engineer with comprehensive experience designing infrastructure platforms. Specialized in Kubernetes, containers, observability tools, microservices, GitOps, CI/CD, and Infrastructure as Code, Jean-Sebastien is looking forward to embracing new and challenging projects.

Portfolio

Callsign

Amazon Web Services (AWS), Go, Elasticsearch, Amazon RDS, Istio, Amazon EKS...

Experience

Elasticsearch - 6 years
Python - 6 years
Amazon Web Services (AWS) - 4 years
Amazon RDS - 3 years
Prometheus - 3 years
Kubernetes - 3 years
Go - 3 years
Amazon EKS - 3 years

Availability

Part-time

Preferred Environment

Amazon Web Services (AWS), Kubernetes

The most amazing...

...thing I've done was delivering and maintaining a large fleet of production Kubernetes clusters for various customers.

Work Experience

Senior DevOps

2019 - 2022

Callsign

Deployed and managed a fleet of 20+ Kubernetes clusters using AWS EKS and EC2 Auto Scaling groups (ASG).
Configured services with horizontal Pod autoscaling, topology constraints, and Pod disruption budget for high availability.
Handled worker nodes scaling with cluster autoscaler and EC2 on-demand and spot instances by maintaining high availability spot instances for abrupt terminations with spot termination handler.
Developed A/B cluster upgrade approach to de-risk system components and Kubernetes upgrades.
Built a Kubernetes mutating webhook in Go to inject secrets from HashiCorp Vault to newly deployed workloads.
Managed Gitlab pipelines for building, testing, quality, security, and deploying Java, Python, and Go applications over Kubernetes and AWS Fargate. Also, managed a GitOps solution to automate the deployment of applications defined by Helm.
Used Fluent Bit, Packetbeat, and Fluentd in combination with ELK for logging purposes and Prometheus, Alertmanager, and Grafana for monitoring crafted alerts and dashboards.
Set up a support team of upskilled developers for self-service, built runbooks templates for common issues, created a new ticketing space using Jira, and set automation to integrate it with Microsoft Teams.
Developed Infrastructure as Code with Terraform and AWS CloudFormation, refactored complex arrangements of dozens of Terraform modules, and architectured a new infrastructure model to increase velocity and reduce cost and complexity proliferation.

Technologies: Amazon Web Services (AWS), Go, Elasticsearch, Amazon RDS, Istio, Amazon EKS, Prometheus, Kubernetes

Experience

Blue/Green Kubernetes Cluster Rollout

Migrated our Kubernetes upgrade process from in-place to a blue/green scenario reducing the complexity of upgrades by removing the need to work out upgrade paths. On the one hand, it decreased the risk by allowing a complete test of the new Kubernetes cluster before they go live (deploy vs. release); on the other hand, it increased the velocity of Kubernetes upgrades.

Education

2015 - 2018

Master's Degree in Computer Systems and Networks

Toulouse INP-ENSEEIHT - Toulouse, France

Skills

Tools

Amazon EKS, Ansible, Istio

Platforms

Amazon Web Services (AWS), Kubernetes

Languages

Go, Python

Storage

Elasticsearch

Other

Prometheus, Amazon RDS, Networks

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