Hedi Harzallah, Developer in Paris, France
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Hedi Harzallah

Verified Expert  in Engineering

DevOps Engineer and Developer

Location
Paris, France
Toptal Member Since
August 5, 2022

Hedi is passionate about new technologies and has a strong record of successful projects in cloud, web development and data science. After previous experiences as team lead, assistant professor, and technical architect, he is part of the SRE team in Talend, where he has built and maintained a multi-could infrastructure supporting SaaS services. In all his jobs, Hedi has shown good interpersonal skills and has been proactively working toward delivering quality projects while respecting deadlines.

Portfolio

Talend
CI/CD Pipelines, DevOps, Cloud, Kubernetes, Flux, GitOps, Linux, Terraform...
Proxym Group
Web Architecture, System Architecture, CI/CD Pipelines, Cloud, DevOps...
Valomnia
Computer Vision, CI/CD Pipelines, DevOps, Cloud, Web Development, Docker...

Experience

Availability

Part-time

Preferred Environment

Amazon Web Services (AWS), Kubernetes, Terraform, DevOps, CI/CD Pipelines, Site Reliability Engineering (SRE), Flux, GitOps, Linux, Python 3

The most amazing...

...experience I've had is contributing to the availability of SaaS products of Gartner magic quadrant company as an SRE engineer.

Work Experience

Site Reliability Engineer (SRE)

2021 - 2022
Talend
  • Automated migration tasks, synced with the product team and PMs, and managed major version product migration.
  • Built and ran Talend Cloud observability infrastructure, including Terraform, Kubernetes, AWS, Prometheus, Thanos, Kibana, Grafana, and Tempo.
  • Assisted the development team in the set up of observability best practices.
Technologies: CI/CD Pipelines, DevOps, Cloud, Kubernetes, Flux, GitOps, Linux, Terraform, Docker, Prometheus, Thanos, Logstash, Kibana, Continuous Integration (CI), Jenkins, GitHub Actions, Azure, Amazon EKS, Azure Kubernetes Service (AKS), Helm, Ansible, Site Reliability Engineering (SRE), Python 3, Apache Kafka, Elasticsearch, Bash, Java, Amazon Web Services (AWS), Grafana, AWS IAM, Amazon S3 (AWS S3), NoSQL, DNS, Amazon CloudWatch, Amazon Virtual Private Cloud (VPC), PostgreSQL, Git, Security, AWS CodePipeline, AWS CloudFormation, Amazon RDS, GitHub, AWS Cloud Architecture, Amazon EC2, Networking, Web Security, Python, AWS Batch, Cloud Architecture, Traefik, Keycloak, Docker Hub, API Gateways, Continuous Delivery (CD), Data Engineering, Data Pipelines

Principal Cloud DevOps Engineer

2018 - 2021
Proxym Group
  • Managed the generalization and dissemination of DevOps, Cloud, and CI/CD culture and practices.
  • Designed system and web architecture and performed technical follow-up on projects.
  • Led technical follow-up of prototypes and PoC developed internally.
  • Audited projects and assisted and supported the development teams.
Technologies: Web Architecture, System Architecture, CI/CD Pipelines, Cloud, DevOps, Kubernetes, Apache Kafka, Amazon EKS, Docker, PHP, JavaScript, Java, GitLab CI/CD, Continuous Integration (CI), Terraform, Elasticsearch, Web Development, Prometheus, Logstash, Ansible, Bash, Amazon Web Services (AWS), Amazon Elastic Container Service (Amazon ECS), Grafana, AWS IAM, Amazon S3 (AWS S3), NoSQL, DNS, Amazon CloudWatch, Amazon Virtual Private Cloud (VPC), PostgreSQL, MySQL, Git, Security, Datadog, Sentry, Google Cloud Platform (GCP), CircleCI, Amazon RDS, GitHub, AWS Cloud Architecture, Amazon EC2, Networking, Web Security, Python, Cloud Architecture, Spring Boot, Keycloak, Docker Hub, API Gateways, Content Delivery Networks (CDN), Blockchain, NestJS, Continuous Delivery (CD), Node.js, TypeScript

Team Lead

2016 - 2018
Valomnia
  • Designed and set up the solution's architecture. Performed feasibility study and estimation.
  • Developed prototypes and assisted the product owner in the product backlog set up.
  • Led the development, code review, and implementation of internal processes.
Technologies: Computer Vision, CI/CD Pipelines, DevOps, Cloud, Web Development, Docker, OpenCV, Python 3, Ansible, C++, Bash, JavaScript, Artificial Intelligence (AI), NoSQL, DNS, PostgreSQL, MySQL, Git, Security, GitHub, Networking, Web Security, Python, Continuous Delivery (CD)

Assistant Professor

2013 - 2018
University of Sousse
  • Imparted lectures in multiple engineering schools and conducted numerous courses, including machine learning, computer vision, Symfony web development, and C programming.
  • Tutored students at the end of studies projects and research projects.
  • Led a master's degree with tasks of student selection and meeting management.
Technologies: Computer Science, Python 3, Computer Vision, Web Development, PHP, Bash, JavaScript, OpenCV, Artificial Intelligence (AI), DNS, MySQL, Git, Security

R&D Engineer

2011 - 2013
Milpix
  • Stabilized, maintained, and improved the image search engine.
  • Conducted feasibility studies and assisted pre-sales efforts through the development of prototypes.
  • Developed APIS and technical documentation writing.
Technologies: PHP, C++, Cassandra, Computer Vision, Bash, JavaScript, OpenCV, Artificial Intelligence (AI), Amazon Web Services (AWS), Networking

PhD Candidate

2007 - 2011
Inria
  • Studied state of the art in the fields of artificial intelligence and computer vision.
  • Ranked first in the worldwide object detection reference challenge.
  • Published in a class A conference and was accepted for an oral session (3% acceptance rate).
  • Led large-scale experimentation on a cluster of hundreds of nodes.
Technologies: Bash, C++, MATLAB, Computer Vision, Artificial Intelligence (AI), Python, JavaScript

Talend Cloud

https://www.talend.com/
Gartner Magic Quadrant Cloud-based ETLs offered as SaaS services across multiple regions worldwide.

I participated in the product availability, stability, and automation of operations and implementation of observability best practices. I was part of the SRE team, handling all Talend Cloud infrastructure deployed over AWS and Azure, focusing on the observability infrastructure (logging, monitoring, and tracing).

All infrastructure was provisioned as code via Terraform or Ansible, and CI/CD pipelines were implemented via Jenkins and GitHub Actions.

Special Olympics World Games

https://www.specialolympics.org/what-we-do/games-and-competition/world-games/world-games-abu-dhabi-2019
I was a Cloud/DevOps engineer on the team for the Special Olympics World Games in Abu Dhabi, in 2019. I provisioned the infrastructure as code with Terraform for multiple environments to support containerized workload. The workload was running on Kubernetes (AWS EKS) and applications were deployed via helm releases. I also implemented CI/CD pipelines to automatically build Docker images and deploy new releases.

Dubai Municipality Platform

https://www.dm.gov.ae/
This is a residents' complaints/request management platform. I was the Cloud/DevOps engineer for this project. I provisioned the infrastructure as code with Terraform to support containerized workload. The workload was running on AWS ECS. I also implemented Jenkins CI/CD pipelines to automatically build Docker images and deploy new releases.

Greenmetrics

https://greenmetrics.io/en/
The first solution dedicated to corporate digital pollution reduction. This big data solution generates dashboards and actionable actions to reduce carbon fingerprints based on light agents gathering information about data and computer resource consumption.

Scope
• Feasibility study, prototyping, and cost calculation
• Design of system architecture
• Development team follow-up, participation in technical decisions, and unblocking the team
• Design and implementation of CI/CD pipelines in GitLab
• Containerization of the application
• Highly available deployment on AWS

Quartus

https://www.quartus-residentiel.fr/
A major French real estate player aiming at implementing eCommerce for real estate. I designed the system architecture and CI/CD pipelines to support the Quartus containerized workload. I implemented it as code using Terraform, AWS ECS, ECR, SQS, RDS, and GitLab CI for CI/CD pipelines.

Techy

Migration of workload from VM-based infrastructure to Kubernetes containerized workload. I migrated more than 30 projects from VMs to a common Kubernetes cluster, infrastructure as code with terraforming OpenStack and Kubernetes provider running on OVH Cloud. I also implemented CI/CD pipelines to automatically build Docker images and deploy new releases.
2007 - 2011

PhD Degree in Computer Science

Université de Grenoble - Grenoble, France

2001 - 2006

Engineer's Degree in Computer Science

National School of Computer Science - Tunis, Tunisia

DECEMBER 2022 - PRESENT

Prometheus Certified Associate (PCA)

The Linux Foundation

DECEMBER 2022 - PRESENT

Google Cloud Certified — Associate Cloud Engineer

Google Cloud

OCTOBER 2022 - PRESENT

AWS Solutions Architect Professional

Amazon Web Services

MAY 2021 - PRESENT

Certified Terraform Associate

HashiCorp

MAY 2021 - PRESENT

Certified Kubernetes Administrator

CNCF

MARCH 2021 - OCTOBER 2025

AWS Certified Solutions Architect Associate

AWS

Libraries/APIs

Thanos, OpenCV, Node.js

Tools

Terraform, Amazon EKS, GitLab CI/CD, Helm, Docker Compose, AWS IAM, Amazon Elastic Container Registry (ECR), Amazon Virtual Private Cloud (VPC), Git, GitHub, Docker Hub, Ansible, Logstash, Jenkins, Jira, Kibana, Amazon Elastic Container Service (Amazon ECS), Grafana, Amazon Simple Queue Service (SQS), Amazon CloudWatch, AWS Batch, Traefik, Azure Kubernetes Service (AKS), MATLAB, Sentry, AWS CloudFormation, CircleCI, Keycloak, Beanstalk

Languages

Bash, Bash Script, Python 3, PHP, C++, JavaScript, Python, Java, TypeScript

Platforms

Kubernetes, Linux, Docker, Amazon Web Services (AWS), Amazon EC2, Opsgenie, Google Cloud Platform (GCP), Apache Kafka, Azure, OpenStack, Blockchain

Paradigms

DevOps, Continuous Integration (CI), Continuous Delivery (CD), Web Architecture

Storage

Amazon S3 (AWS S3), MySQL, PostgreSQL, NoSQL, Elasticsearch, Cassandra, Redis, OVH, Datadog, Data Pipelines

Frameworks

Flux, Spring Boot, NestJS

Industry Expertise

Network Security

Other

CI/CD Pipelines, Site Reliability Engineering (SRE), Computer Science, Cloud, AWS Cloud Architecture, Cloud Architecture, AWS Certified Solution Architect, GitOps, System Architecture, Web Development, Prometheus, GitHub Actions, Artificial Intelligence (AI), Amazon RDS, DNS, Security, Networking, API Gateways, Content Delivery Networks (CDN), Amazon Kinesis, Computer Vision, Big Data, AWS CodePipeline, Web Security, Monitoring, Observation, Data Engineering

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