Back-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: Python, Flask, SQLAlchemy, Celery, Continous DeliveryDevOps 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: Python, Flask, SQLAlchemy, Celery, Docker, Puppet, Ansible
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
Availability
Part-time
Preferred Environment
Debian, Python 3, Rust, PyCharm, Docker
The most amazing...
...project I've built is a service that helps deploy OpenStack clusters made of thousands of servers.
Employment
Experience
- Growbots.com (Development)https://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 (Development)https://www.ovh.com/world/public-cloud/instances/
Worked to build the OVH Public Cloud based on OpenStack, as part of a team spread around the world.
- Internal tools for provisioning large clusters of dedicated servers
- Server configuration with Puppet
- Automation of Operating System image building
- Monitoring - Feedsubs.com (Development)https://feedsubs.com
Open-source RSS feed reader written in Python 3 with Django.
- Asynchronous fetch of feeds with background tasks
- Deployment to production using Docker containers
- Automation with Ansible
- Frontend using the Bulma CSS framework
- Django static assets served with Caddy
- Security: HTTPS with Let's Encrypt, HSTS - IMAPClient (Development)https://github.com/mjs/imapclient
Maintainer of IMAPClient, a popular Python library for interacting with email servers.
- 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
- Improved documentation - Bplustree (Development)https://github.com/NicolasLM/bplustree
A library providing an on-disk sorted datastructure that implements the same interface as Python dicts.
- Uses a B+ Tree for efficient lookups and traversals
- Uses a Write Ahead Log (WAL) for transaction management and atomicity
- Supports arbitrary large values using linked overflow pages
- Extensive test suite - Spinach (Development)https://github.com/NicolasLM/spinach
Lightweight engine for background tasks using Redis as an alternative to the popular Celery.
- Supports at-least-once or at-most-once delivery per task
- Periodic tasks without an additional process
- Scheduling of tasks in batch
- Embeddable workers for easier testing
- First class support for Python threads
- Extensive test suite
Skills
Languages
Python, HTML, Lua, Rust, CSSFrameworks
Flask, Django, Django REST Framework, BulmaTools
Celery, Ansible, Git, Sentry, Puppet, RabbitMQ, Nginx, Caddy ServerPlatforms
Docker, Debian, OpenStackStorage
PostgreSQL, Redis, MySQL, Memcached, RethinkDBOther
Processing & Threading, Gunicorn, NomadLibraries/APIs
SQLAlchemy, RequestsParadigms
Microservices
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
