Software Developer
2016 - 2016Manhan Group (via Toptal)- Created a command-line application to optimize model using evolutionary strategies and external model evaluation software.
Technologies: Python, Inspyred, Wheezy.templateBack-end Developer for Auto Lease Portal
2016 - 2016Lactic Acid LLC (via Toptal)- Created an API to support car lease deal listings and search.
- Built an import mechanism to interface with a specialized web scraping service.
- Developed a mechanism to match scraped data with the vehicles database.
- Created a mechanism to keep data up to date with external sources.
- Wrote extensive documentation of code and API using Sphinx.
- Deployed a Debian GNU/Linux server with application.
Technologies: Flask, SQLAlchemy, Sphinx, Grepsr, Mailchimp, Linux, PosgreSQL, Nginx, GunicornSoftware Developer
2016 - 2016Manhan Group (via Toptal)- Created a REST API for a command-line application with data fetching from PostgreSQL+PostGIS database.
- Built a command-line tool to import data to the database.
Technologies: Python, Bottle, PostgreSQL, PostGISFounder, CEO, and Development Engineer
2013 - 2015DonePath Software e Monitoramento, Ltda.- Developed a system to analyze real-time GPS tracker data and infer traffic and vehicle usage information.
- Built a system to allow parents to track their children's school transportation.
- Created a web app to help people encounter each other by broadcasting their geolocation to one another.
Technologies: Python, Cython, Django, Tornado Web, Bottle, SQLAlchemy, PostgreSQL, PostGIS, Redis, NumPy, SciPyDevelopment Engineer
2013 - 2014Research Center for Inspection Technology/PUC-Rio- Developed an algorithm to analyze and correct duct inspection data.
- Created software to automate embedded Linux installs.
- Built FPGA and CPLD control logic for several systems.
Technologies: Python, Bash, MATLAB, VHDL, Xilinx Spartan FPGA, Xilinx CoolRunner-II CPLDIntern
2012 - 2012Research Center for Inspection Technology/PUC-Rio- Developed an FPGA implementation of Golay-24 error correcting code encoder and decoder for submarine telemetry data transfer.
- Wrote a software validator to test FPGA error correcting encoder.
- Programmed CPLD logic to control ultrasonic transducers.
Technologies: VHDL, Xilinx Spartan FPGA, Xilinx CoolRunner-II CPLDSystems Administrator
2003 - 2008ViaLink Informática, Ltda.- Deployed and managed several Linux servers.
- Planned and managed a MAN-sized TCP/IP network.
- Developed and deployed an access control system.
- Developed and deployed a new traffic shaping and QoS system.
Technologies: Debian GNU/Linux, Bash, MySQL, FreeRadius, Netfilter (iptables), HTB
Python Developer in Rio de Janeiro - State of Rio de Janeiro, Brazil
Member since August 17, 2015
Leandro has twelve years of experience with IT and has been working with Python since 2013. He has excellent analytical skills—paired with the know-how that comes from combined years of experience and a degree in electrical engineering—and a passion for building efficient and cost-effective systems.
Leandro is now available for hire
Portfolio
- Manhan Group (via Toptal)Python, Inspyred, Wheezy.template
- Lactic Acid LLC (via Toptal)Flask, SQLAlchemy, Sphinx, Grepsr, Mailchimp, Linux, PosgreSQL, Nginx, Gunicorn
- Manhan Group (via Toptal)Python, Bottle, PostgreSQL, PostGIS
Experience
- Linux, 15 years
- Python, 4 years
- PostgreSQL, 2 years
- Tornado, 2 years
- Flask, 2 years
- Cython, 1 year
Availability
Part-time
Preferred Environment
Mac OS X, Python, PyCharm
The most amazing...
...software I've built is a system to analyze real-time GPS tracker data from thousands of cars, extracting information about traffic and car usage.
Employment
Experience
- TornadoIRC (Development)https://github.com/leandropls/tornadoirc
IRC server written in Python 3.4 on top of TornadoWeb. Has most of the common functions expected from an IRC server (register, message, join, channels, chanops, modes etc).
- Git-hours (Development)https://gist.github.com/leandropls/6db26df3939b094dd321
Tool with clever algorithm to estimate number of hours spent on a project by parsing its Git log. The data may be filtered by date range and author.
- Meals Back-end (Development)
Back-end code of a project written for Toptal screening. Implements a REST API for a multiuser app that records meals eaten by the user.
- Sigame.online Back-end (Development)https://github.com/leandropls/sigame-backend
Next generation version of the back-end of the web app hosted at http://sigame.online/. It allows users going to a meeting to see each other on a map as they move toward their meeting location.
- WSGI: The Server-Application Interface for Python (Publication)Nowadays, almost all Python frameworks use WSGI as a means, if not the only means, to communicate with their web servers. This is how Django, Flask and many other popular frameworks do it. This article intends to provide the reader with a glimpse into how WSGI works, and allow the reader to build a simple WSGI application or server.
- Building a Rest API with the Bottle Framework (Publication)REST APIs have become a common way to establish an interface between web back-ends and front-ends, and between different web services. The simplicity of this kind of interface, and the ubiquitous support of the HTTP and HTTPS protocols across different networks and frameworks, makes it an easy choice when considering interoperability issues. Bottle is a minimalist Python web framework. It is lightweight, fast, and easy to use, and is well-suited to building RESTful services. In this article, I'll provide a walkthrough of how to build a RESTful API service using Bottle.
Skills
Languages
Python, Bash, SQL, CSS, HTML, JavaScript, VHDL, CFrameworks
Flask, Bottle, Django, Cordova, Bootstrap, Knockout.jsLibraries/APIs
Flask-RESTful, SQLAlchemy, RequireJS, jQueryTools
CloudFlare, Mercurial, Git, MATLABPlatforms
Ubuntu, Debian Linux, Linux, DigitalOcean, AWS EC2Storage
Redis, MySQL, PostGIS, AWS S3, PostgreSQLOther
Tornado, Cython, AWS Route 53Paradigms
Scrum
Education
- Partially-completed MBA degree in Management2013 - 2014Pontifícia Universidade Católica do Rio de Janeiro - Rio de Janeiro/RJ - Brazil
- Partially-completed Master's degree in Aeronautical Engineering2012 - 2012Instituto Tecnológico de Aeronáutica - São José dos Campos/SP - Brazil
- Bachelor's degree in Electrical Engineering2006 - 2012Pontificia Universidade Católica do Rio de Janeiro - Rio de Janeiro/RJ - Brazil
