Sebastien is available for hire

Sebastien Mathieu

Verified Expert in Engineering

Full-stack Developer

Christchurch, Canterbury, New Zealand

Toptal member since September 25, 2020

Expertise

Web Development Code Review Full-stack PHP 7 MySQL SQL Bash JSON GitHub DevOps Python HTML5 Node.js Cheetah

Bio

Sebastien comes from a background of research in robotics and machine learning. His preference is working in the web domain as it can scale quickly, and he's also passionate about data science. He works best when working through a problem and feels challenged. Sebastien is a quick thinker and problem solver.

Portfolio

FrancklinCovey

Python, Docker, CI/CD Pipelines, Django, Pandas, NumPy, JSON, Bash Script...

Lorestry

React Native, Amazon Web Services (AWS), Infrastructure as Code (IaC), HTML5...

eMastered

React, Express.js, Next.js, Amazon Web Services (AWS), Cypress, Jira, HTML5...

Experience

Linux - 17 years PHP - 15 years APIs - 8 years Symfony - 6 years Amazon Web Services (AWS) - 4 years Docker - 4 years React - 3 years Magento 2 - 2 years

Availability

Part-time

Preferred Environment

PHP, Docker, Linux, Visual Studio Code (VS Code), Composer, Amazon Web Services (AWS), Node.js, Python

The most amazing...

...project I've made recently was a full integration of Uber delivery service to enable the company to pursue product deliveries during the COVID-19 lockdown.

Work Experience

Senior Software Engineer

2022 - 2022

FrancklinCovey

Developed the codespace environment for developers and new contractors to reduce the onboarding time.
Moved downloadable content to secure S3 bucket links.
Helped reunite multiple platforms into one single login interface.
Developed new Django AWS S3 storage with synchronization between multiple buckets.

Technologies: Python, Docker, CI/CD Pipelines, Django, Pandas, NumPy, JSON, Bash Script, Web Development, Infrastructure, Full-stack, Web Frameworks

Full-stack Developer (React Native, JavaScript)

2022 - 2022

Lorestry

Added features to the mobile application in React Native.
Integrated Sentry to the React Native application.
Developed the complete cloud infrastructure using the AWS Cloud Development Kit (AWS CDK) framework.

Technologies: React Native, Amazon Web Services (AWS), Infrastructure as Code (IaC), HTML5, SQL, JavaScript, CSS, HTML, DevOps, GitHub, Code Review, PostgreSQL, CI/CD Pipelines, Amazon EC2, JSON, Bash Script, AWS Fargate, Web Development, Infrastructure, Full-stack

React Developer

2022 - 2022

eMastered

Developed user interface components and implemented them following well-known React workflows, such as Flux or Redux.
Worked on AWS image optimization and processing, stored in AWS CloudFront CDN.
Integrated Cypress.io end-to-end testing in the validation process for CI/CD pipeline.

Technologies: React, Express.js, Next.js, Amazon Web Services (AWS), Cypress, Jira, HTML5, SQL, MySQL, PHP 7, JavaScript, CSS, HTML, DevOps, React Router, Redux, GitHub, Code Review, Architecture, Laravel, CI/CD Pipelines, Microservices, Kubernetes, Jira REST API, JSON, Ajax, Bash Script, Postman, Web Development, Infrastructure, Full-stack, Web Frameworks

Freelance Full-stack Developer

2020 - 2021

InvolveSoft

Refactored and migrated all of the infrastructure from DigitalOcean to AWS using IaC.
Divided the AWS infrastructure cost by 10 while keeping or improving the performance.
Recreated the full CI/CD pipeline workflow using GitHub.
Implemented Cypress.io from end-to-end and included it inside the CI/CD pipeline.
Installed and configured Grafana monitoring tools for the client with a Slack integration.
Integrated SSO with React as the front end and Python on the back end. The application is serverless and hosted in AWS.

Technologies: PHP, Amazon Web Services (AWS), Node.js, Python, Cypress, React, Redis, Serverless Architecture, Docker, Infrastructure as Code (IaC), TypeScript, Jira, HTML5, SQL, MySQL, PHP 7, JavaScript, CSS, HTML, DevOps, Bash, GitHub, Code Review, Architecture, CI/CD Pipelines, Azure, Bootstrap, Amazon EC2, JSON, Ajax, Bash Script, Postman, AWS Fargate, Web Development, Infrastructure, jQuery, Full-stack, Web Frameworks

Back-end Web Developer

2017 - 2020

Kathmandu

Ensured good practice, CI integration, and new project integration.
Headed the data migration from Magento 1 to Magento 2.
Decoupled as many website features as possible into a serverless architecture, for example, in-store stock and Uber order delivery.
Created a Magento feature for customers to create online orders in-store. The API feature has been integrated into almost 200 stores' POS systems.
Handled the AWS infrastructure from Elastic Load Balancer to Dockerized infrastructure.
Created a monitoring tool using Grafana. I hosted it in an AWS Fargate infrastructure.

Technologies: Amazon Web Services (AWS), PHP 7, Node.js, Neo4j, MySQL, APIs, Symfony, Grafana 2, React, PHP, Docker Compose, Docker, Linux, Sublime Text 3, Visual Studio Code (VS Code), Magento 2, Magento 1, Jira, HTML5, SQL, JavaScript, CSS, HTML, DevOps, React Router, Redux, Bash, GitHub, Code Review, Design Patterns, Architecture, CI/CD Pipelines, Microservices, Pandas, NumPy, Amazon EC2, Jira REST API, TensorFlow, JSON, Ajax, Bash Script, Postman, AWS Fargate, Web Development, Infrastructure, Magento, jQuery, PyTorch, API Connectors, Full-stack, Web Frameworks

IT Director

2011 - 2015

Veditec

Built a custom ERP solution for the organization using PHP.
Developed an integration for four shipping methods in collaboration with partners.
Designed and built a warehouse staff UI interface and optimization tool for the placement of products on shelves.
Created SEO optimization tools for the marketing team.

Technologies: MySQL, APIs, Symfony, PHP, Makefile, Linux, PHP 7, Sublime Text 3, HTML5, SQL, CSS, HTML, DevOps, Bash, Architecture, Management, Material UI, JSON, Ajax, Bash Script, Web Development, Infrastructure, Doctrine, Yii, jQuery, API Connectors, Full-stack

Research and Development Developer

2009 - 2011

Visual-Link

Improved a custom WYSIWYG CMS used by most of Visual-link's clients at the time.
Developed an eCommerce website from scratch using CakePHP including a new payment method. The website was a full Flash application, and all user actions were API-based.
Created the deployment process into servers for the CMS. The CMS product owned by the company was their main product and needed an easy deployment process in a new server with customization included (modules and plugins).

Technologies: MySQL, APIs, PHP, Makefile, Linux, Sublime Text 3, HTML5, SQL, CSS, HTML, DevOps, Bash, Code Review, Architecture, JSON, Ajax, Bash Script, Web Development, Infrastructure, Doctrine, jQuery, Full-stack

Experience

Uber Delivery Integration

I contributed to the full integration of the Uber delivery service to enable the company to pursue product deliveries during the COVID-19 lockdown. The project delivery needed to be done in less than two weeks.

Requirements included:
* Checking availability of store stock
* Checking the distance between the customer and the closest store
* Checking the weight of the products

DigitalOcean to AWS Migration with AWS CDK

The migration included more than 20 servers from DigitalOcean to AWS. The entire infrastructure is implemented using AWS CDK, and so is the infrastructure as code. Each client has specificities that are configurable independently. The infrastructure is deployed using GitHub Actions.

Lorestry App

Lorestry creates useful lists and reports while recording activities and early events such as your child's first words, favorites, developmental milestones, and early life experiences.

I developed the complete cloud infrastructure using the AWS Cloud Development Kit (AWS CDK) framework.

Education

2002 - 2006

Master's Degree in Applied Mathematics

ENSIMAG - Grenoble, France

Certifications

SEPTEMBER 2021 - SEPTEMBER 2024

AWS Certified Developer Associate

AWS

SEPTEMBER 2021 - SEPTEMBER 2024

AWS Certified Solutions Architect Associate

AWS

FEBRUARY 2020 - PRESENT

AWS Innovate Machine Learning and AI Edition Certificate of Attendance

AWS

Skills

Libraries/APIs

React, Node.js, Doctrine, Jira REST API, jQuery, TensorFlow, PyTorch, React Router, Pandas, NumPy

Tools

Sublime Text 3, Jira, Composer, GitHub, Postman, AWS Fargate, Docker Compose, Makefile, Amazon SageMaker, OpenAI Gym, Cheetah

Languages

PHP 7, PHP, Python, JavaScript, HTML5, SQL, HTML, Bash, CSS, Bash Script, TypeScript, C++

Frameworks

Symfony, Laravel, Django, Web Frameworks, Express.js, Next.js, React Native, Redux, Bootstrap, Material UI, Cypress, Yii

Paradigms

DevOps, Design Patterns, Management, Microservices, Serverless Architecture

Platforms

Magento 2, AWS Lambda, Linux, Docker, Amazon EC2, Amazon Web Services (AWS), Magento, Visual Studio Code (VS Code), Magento 1, Apache2, Azure, Kubernetes

Storage

MySQL, JSON, Neo4j, Redis, PostgreSQL, Amazon Aurora

Other

APIs, API Connectors, Full-stack, Web Development, CI/CD Pipelines, Code Review, Architecture, Machine Learning, Grafana 2, Ajax, Infrastructure, Mathematics, Infrastructure as Code (IaC), Natural Language Processing (NLP), Generative Pre-trained Transformers (GPT)

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