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Geoffrey Bergeret
Verified Expert in Engineering
Software Developer
London, United Kingdom
Toptal member since April 6, 2020
Bio
Geoffrey is a dedicated, knowledgeable, and highly productive DevOps engineer. He has experience in infrastructure, security, and cloud architecture but also fully embodies product thinking and lean development. Geoffrey moved to work as a consultant to share his expertise and help smaller businesses improve their cloud infrastructure until they are ready to grow their team with an in-house specialist.
Portfolio
Kennek
Google Cloud Platform (GCP), Cloud Run, Terraform, GitHub Actions
Harvie
Amazon Web Services (AWS), Amazon Elastic Container Service (ECS), DevOps...
Fluidly
CircleCI, Terraform, Kubernetes, Google Cloud Platform (GCP), Docker, Firewalls...
Experience
- Amazon Web Services (AWS) - 5 years
- Terraform - 5 years
- Kubernetes - 4 years
Preferred Environment
Amazon Web Services (AWS), Kubernetes, Terraform, Google Cloud Platform (GCP), CircleCI, Message-driven Architecture, CQRS, Microservices Architecture
The most amazing...
...thing I've done is rebuild a client's cloud infrastructure, moving away from Jenkins X to Amazon EKS using IaC, CircleCI, and Argo CD in just two months.
Work Experience
Platform Engineer and DevOps Consultant
2025 - 2025
Kennek
- Reviewed, improved, and secured cloud Infrastructure on a greenfield project before opening it to users.
- Worked on a project that set up the base for a new project so the engineering team could work efficiently and the executive team could be confident in the security and reliability of the platform.
- Supported the team using this new cloud native infrastructure running on GCP.
Technologies: Google Cloud Platform (GCP), Cloud Run, Terraform, GitHub Actions
Platform Engineer and DevOps Consultant
2024 - 2024
Harvie
- Migrated a microservices infrastructure from Heroku to AWS ECS (using Fargate), leveraging other AWS Services (i.e., S3, RDS, ElastiCache, and more).
- Improved cloud security posture and optimized cloud costs.
- Supported the client engineering team in its cloud usage.
Technologies: Amazon Web Services (AWS), Amazon Elastic Container Service (ECS), DevOps, Terraform, Heroku
Infrastructure Engineer | Cloud Architect
2019 - 2020
Fluidly
- Built a next-generation platform on GCP/GKE to host the SaaS product (cashflow forecasting).
- Developed DevSecOps culture for the engineering teams to empower them using IaC (self-service).
- Supported the mono-environment approach (no staging, no QA but only production).
- Improved CI/CD pipeline speed to reduce time to market to less than a day.
- Rebuilt infrastructure as code approach so anyone can create infrastructure (via PR process).
- Rolled out a templating system for Kubernetes YAMLs to apply policies across services.
Technologies: CircleCI, Terraform, Kubernetes, Google Cloud Platform (GCP), Docker, Firewalls, Google Kubernetes Engine (GKE), Security Audits, Microservices Architecture, Message-driven Architecture
DevOps Engineer
2017 - 2019
Onfido
- Implemented a Jenkins pipeline to execute Terraform from Jenkins (CI/CD for Terraform).
- Initiated GitOps approach to run Terraform using PRs and to have an auditable change process.
- Integrated Ansible with Terraform projects to manage EC2 instance provisioning.
- Contributed to AWS accounts split using AWS Organisations for better workload segregation.
- Deployed and maintained a transit VPC (using datapath.io) across VPCs in multiple regions.
Technologies: Amazon Web Services (AWS), Jenkins, Ansible, Terraform, Kubernetes, Docker, Firewalls, CI/CD Pipelines, Microservices Architecture
DevOps Engineer
2016 - 2017
DriveTribe
- Implemented a Jenkins pipeline to execute Terraform from Jenkins (CI/CD for Terraform).
- Refactored Infrastructure as Code approach so we can create, update and delete environments.
- Built a review process where each developer could use their dedicated full-sized environment.
- Moved Jenkins master and runner to a Kubernetes cluster to improve elasticity using autoscaling.
- Contributed to implementing a blue/green rollout setup in a CQRS architecture.
Technologies: Ansible, Terraform, Kubernetes, Amazon Web Services (AWS), Docker, Firewalls, Microservices Architecture, CQRS, Message-driven Architecture
DevOps Engineer
2016 - 2016
Onfido
- Initiated infrastructure as code culture in the DevOps team (using Terraform and Ansible).
- Contributed to migrating the platform from EC2 instances to Kubernetes (using Kraken).
- Contributed to moving from a monolith platform to a microservices architecture (using Kubernetes).
Technologies: Jenkins, Ansible, Terraform, Kubernetes, Amazon Web Services (AWS), Docker, Firewalls, Microservices Architecture
System and DevOps Engineer
2015 - 2016
Contentment
- Led all system and DevOps parts, sizing the infrastructure and supporting it.
- Oversaw all environment exploitation (development, QA, staging, and production).
- Managed improvements to the development lifecycle (Git, CI, CD).
- Migrated and automated the deployment of the existing architecture in AWS with a Docker layer.
Technologies: GitLab CI/CD, Docker, Amazon Web Services (AWS)
Network Engineer (Apprentice)
2012 - 2015
Orange
- Automated business VPN production by implementing scripts (Perl).
- Investigated complex applications (impacts, procedure preparation, and rollback for operators).
- Provided 2nd-line support to the operational team to keep issues under our SLA.
- Supported and developed some business applications using PHP and MySQL.
- Provided training courses for the team regarding automation.
Technologies: Firewalls
System Administrator
2011 - 2014
SHPS SARL
- Optimized infrastructure setup to put 10x more clients per server and reduce cost by about 10x.
- Automated server maintenance using Git and Bash so maintenance time can be reduced to almost none.
- Grew user base from 100 to 3,000 while running a support level 2.
Technologies: Iptables
Experience
Infrastructure as Code for a Microservice Environment (PoC)
https://github.com/gbergere/micro-service-as-codeThis is a proof of concept for a microservice IaC environment where everything related to the service is self-contained in the service repository. This repository will use EC2 instances to deploy the service but we can easily swap this with a Kubernetes cluster (commonly used in microservices environments). We are going to use EC2 instances here to reduce dependencies in this PoC. This infrastructure is coded as a module so we can run end to end tests using test-kitchen.
Terraform Module to Create an S3 Bucket (AWS)
https://github.com/gbergeret-cloud/terraform-aws-s3-bucketA Terraform module to create and manage AWS S3 buckets with encryption and versioning enabled. This module uses Terratest, Checkov, and TFLint to run tests and security code analysis in various GitHub Action workflows.
Cloud Architect and Platform Engineer
http://www.saveursetvie.frI've built and now support all the cloud infrastructure for Saveurs et Vie from CI/CD pipeline to size. Designed the containerized applications' hosting components for the data loss prevention policy.
Education
2012 - 2015
Master's Degree (with Professional Experience) in Computer Science
Ecole Supérieur d'Ingénieur Paris-Est (ESIPE) - Paris, France
2011 - 2012
Master's Degree in Computer Science
Université de technologie de Belfort Montbéliard (UTBM) - Belfort, France
2009 - 2011
Two-year Technical Degree in Computer Science
Université de Franche-Comté (IUT-BM) - Belfort, France
Certifications
DECEMBER 2024 - DECEMBER 2026
Terraform Authoring and Operations Pro with AWS
HashiCorp
APRIL 2024 - APRIL 2027
AWS Certified Security – Specialty
Amazon Web Services
APRIL 2024 - APRIL 2027
AWS Certified Advanced Networking – Specialty
Amazon Web Services
MARCH 2024 - MARCH 2027
AWS Certified DevOps Engineer – Professional
Amazon Web Services
APRIL 2023 - APRIL 2026
AWS Certified Solutions Architect – Professional
Amazon Web Services
JANUARY 2021 - JANUARY 2027
Associate Cloud Engineer Certification
Google Cloud
Skills
Tools
AWS Fargate, Terraform, Amazon Simple Queue Service (SQS), Amazon Elastic Container Service (ECS), Jenkins, CircleCI, GitLab CI/CD, Ansible, Google Kubernetes Engine (GKE), Iptables
Paradigms
Continuous Integration (CI), Message-driven Architecture, CQRS, Microservices Architecture, DevOps
Platforms
Docker, Amazon Web Services (AWS), Kubernetes, Google Cloud Platform (GCP), Cloud Run, Heroku
Other
Immutable Infrastructure, Firewalls, Security Audits, CI/CD Pipelines, AWS DevOps, Identity & Access Management (IAM), Infrastructure as Code (IaC), GitHub Actions
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