Back-end Developer
2018 - 2020Open Tender- Designed and developed a REST API replacing the legacy server-side rendered forms.
- Designed a point-of-sales system with bidirectional synchronization of orders between restaurants and the cloud SaaS application.
- Established a continuous deployment strategy using GitHub, CircleCI, Docker, and AWS ECS to deploy the main SaaS application.
- Built the integration with third-party services (payment, CRM, and loyalty programs).
- Migrated the application from Python 2.7 to Python 3.
- Integrated asynchronous tasks using Celery, improving the latency of the web application.
Technologies: Amazon Web Services (AWS), CircleCI, AWS, Docker, Ansible, MySQL, Flask, PythonBack-end Developer
2016 - 2018Growbots- Wrote and maintained a REST API in Flask with Celery background tasks handling hundreds of requests per second.
- Improved performances by switching from a pull-based approach to a push one for external services.
- Improved application latency by profiling and rewriting SQL queries as well as tuning MySQL.
- Tracked down and reduced memory leaks in Python applications.
- Migrated existing codebases from Python 2 to Python 3.
- Provided long-term maintenance of a core service in a microservices architecture.
- Improved the continuous delivery workflow with GitLab CI and Docker containers.
Technologies: Continuous Delivery (CD), Celery, SQLAlchemy, Flask, PythonDevOps Engineer
2014 - 2016OVH- Developed REST APIs in Flask that help deploy large OpenStack clouds.
- Provisioned the server with Puppet and Ansible.
- Wrote an API to automate the creation and signature of SSL certificates used by Puppet to authenticate hosts.
- Monitored large-scale infrastructure with Shinken.
- Deployed production using Docker containers on Apache Mesos.
Technologies: Ansible, Puppet, Docker, Celery, SQLAlchemy, Flask, Python
Nicolas Le Manchet
Software Developer in Warsaw, Poland
Member since June 20, 2018
Nicolas is an experienced Python developer who enjoys writing back-end code with Django and Flask. Having worked as a DevOps for a large Cloud provider as well as smaller startups in different countries, he likes helping teams of all horizons to build reliable infrastructure.
Nicolas is now available for hire
Portfolio
- Open TenderAmazon Web Services (AWS), CircleCI, AWS, Docker, Ansible, MySQL, Flask, Python
- GrowbotsContinuous Delivery (CD), Celery, SQLAlchemy, Flask, Python
- OVHAnsible, Puppet, Docker, Celery, SQLAlchemy, Flask, Python
Availability
Part-time
Preferred Environment
Docker, PyCharm, Rust, Python 3, Debian
The most amazing...
...project I've built is a service that helps deploy OpenStack clusters made of thousands of servers.
Employment
Experience
- Open Tender/Brandibblehttps://www.brandibble.co
Participated to the development of an integrated solution for restaurants providing online ordering, point-of-sales, kitchen display system, API and the integration with dozens of third-party systems.
- Growbotshttps://www.growbots.com
Contributed with a team of 20 developers to the back-end running the Growbots.com application for outbound sales.
- OVH Public Cloud
Built the OVH public cloud based on OpenStack as part of a global team. I delivered internal tools for provisioning large clusters of dedicated servers. Completed server configuration with Puppet, automated operating system image building, and oversaw monitoring.
- Feedsubshttps://feedsubs.com
This is an open-source RSS feed reader written in Python 3 with Django. I created asynchronous fetch of feeds with background tasks, deployed to production using Docker containers, automated with Ansible, and built the front end using the Bulma CSS framework. I used Django static assets served with Caddy and ensured security using HTTPS with Let's Encrypt, HSTS.
- IMAPClienthttps://github.com/mjs/imapclient
Maintainer of IMAPClient, a popular Python library for interacting with email servers.
I fixed issues related to SSL/TLS connections on different versions of Python. Improved the code base by refactoring aging parts. Added support for newer RFCs related to IMAP and improved documentation. - Bplustreehttps://github.com/NicolasLM/bplustree
A library providing an on-disk sorted data structure that implements the same interface as Python dicts.
I used a B+ tree for efficient look-ups and traversals, a Write Ahead Log (WAL) for transaction management and Atomicity, supported arbitrary large values using linked overflow pages, and delivered an extensive test suite. - Spinachhttps://github.com/NicolasLM/spinach
Lightweight engine for background tasks using Redis as an alternative to the popular Celery.
I created supports for at-least-once or at-most-once delivery per task, periodic tasks without an additional process, the scheduling of tasks in batches, embeddable workers for easier testing, first-class support for Python threads, and an extensive test suite.
Skills
Languages
Python, HTML, Python 3, Lua, Rust, CSSFrameworks
Flask, Django, Django REST Framework, BulmaLibraries/APIs
REST APIs, Asyncio, SQLAlchemy, RequestsTools
Celery, Ansible, Git, Sentry, Puppet, PyCharm, CircleCI, RabbitMQ, Nginx, Caddy ServerPlatforms
Docker, Debian, Amazon Web Services (AWS), OpenStackStorage
PostgreSQL, Redis, MySQL, MemcachedOther
Processing & Threading, Gunicorn, AWS, Sales, HTTPS, RSS Feeds, IMAP, RFC Specs, SSL, NomadParadigms
Microservices, Continuous Delivery (CD), RefactoringIndustry Expertise
Security
Education
- Engineering in Systems, Networking and Telecommunication2011 - 2014University of Technology of Troyes - Troyes, France
- University of Technology Diploma (DUT) in Networking and Telecommunication2010 - 2011University of Clermont-Ferrand - Clermont-Ferrand, France
