Dipl. Software Engineer

7/2019 – 11/2020

Development and Devops of a WebRTC conferencing solution using the Janus Gateway Media Server as an SFU. Integration with other company products. Code written in TypeScript, using React-JS and Material-UI. Devops with Ansible.

Ansible, React (JavaScript library), Typescript

1/2018 – 5/2018

Work in the Galileo Satellites KPI project team. Development of the ionospheric model NeQuick-G as a Python extension in C, with unit tests.

Python

5/2017 – 10/2017

Develop search capabilities for the Netdoktor.de with Elasticsearch 5.x series. Django, Python, Elasticsearch-py.

Help to improve page loading time by changing CSS design and reducing JavaScript dependencies. JavaScript, AngularJS, (jQuery removal), CSS based on SASS.net.

Postgresql, Python, Django, AngularJS, JavaScript, Syntactically Awesome Stylesheets (Sass)

10/2016 – 4/2017

To establish a development policy and boost up team performance and collaboration. Included scrum development cycles, code reviews, on/off sprints, technical seminars. Set up resources for continuous integration and continuous delivery with Buildbot.

Scrum, Python, Django, JavaScript, Jquery

1/2016 – 12/2017

Maintenance of the Belgian Telco Proximus’ S12 Switch Monitoring System that I previously developed with another fellow software engineer.

Postgresql, Red Hat Enterprise Linux (RHEL), Perl, Python, Django, AngularJS, Jquery

10/2014 – 10/2016

* Co-development of the S12 Switching Monitor for Belgacom (major telecom provider in Belgium), which consisted of developing TCP/IP services and a web application.
* Co-development of a SIP Routing Application Service for VOO (a telecom provider in Belgium).
* Design and development of a software project combining Web-RTC, SIP, ASR and TTS technologies.

Postgresql, Red Hat Enterprise Linux (RHEL), Bash Shell, Perl, Python, Django, AngularJS, Jquery, Less

11/2013 – 4/2014

Implementation of an ESA (European Space Agency) specific client/server protocol to manage house-keeping tasks in satellites. Server side implementation using epoll/kqueue in Python 2.7. Mercurial as SCM. The protocol was a binary-type, oriented to connection and session-aware.

Python

10/2012 – 5/2013

Helping launch MVNO service in The Netherlands. In charge of the development of the CDRs (call data record) Handler (a Twisted service), the SMPP External Service Messaging Entity (also a Twisted service acting as the gateway to route outgoing/incoming SMSes from/to the in-house platform) and the Blog (a Django project). Implementation of a Continuous Integration policy based on Buildbot.

Scrum, Python, Django

3/2012 – 8/2012

Development of a platform for mobile games' monetisation. The project was launched in the Zürich Startup Weekend, March 2012. Developed the company website, a real-time monitor to observe games and awards while they were being played, and the REST web API that was implemented in games. There were several software products in place: Django, Bottle-py, Redis, and Gevent in the backend, and lots of plain JavaScript and jQuery in the Frontend. Set up the infrastructure in AWS to run the project. Also the services that allowed the implementation of the team dynamics: bug reporting, continuous integration, code review, and the company wiki.

Python, Amazon Web Services (AWS), Django, JavaScript, Jquery

3/2011 – 10/2011

Design, development, testing and maintenance of a large enterprise desktop and
web application to run medical trials for a company in the pharmaceutical industry. Development in Linux, Python, GTK, Django, Javascript, CSS, HTML.
Source Code Control with Subversion and Mercurial. Database Management
based on OpenLDAP, MySQL and Redis. Build our self Linux distribution
from Ubuntu in order to limit access to the data of the people involved in medical trials.
Code review based on Review Board. Automation of the Linux builds and tests based on Buildbot.

Scrum, Linux Entwicklung, Python, Django, JavaScript

1/2010 – 2/2011

Conception, analysis, design, development and system administration of
Witmeet. Witmeet was a Start-up with the goal to bring people together to speak foreign languages.

It was launched the 5th. of September 2010. The services were developed
with Django, MySQL, Redis, jQuery, Google Maps, Google Local Search and
OpenID, with Mercurial as SCM.

An interesting achievement was the development of a JavaScript based Clustering Solution for maps, preventing the load of too many markers in the map displayed in the site. The solution consisted of an algebra of keys in Redis that allowed access to different layers of markers grouped by Google Maps' zoom levels.

Postgresql, Red Hat Enterprise Linux (RHEL), Scrum, Python, Django, JavaScript, Jquery

3/2009 – 12/2009

Senior consultant, software engineer and system administrator. Set up of team’s
development policy (definition of development cycles, versioning, and repository
maintenance). As Sysadmin, improve servers performance (Linux kernel level parameters, MySQL and Apache), reduce web response times and alleviate bottle necks. Network monitoring with Python scripts, Cacti, Nagios,
and command line utilities. Deployment of DNS servers IP location aware. Set
up in-house Xen Virtualization Testing-Stage platform (Debian and Windows
domains).

Mysql, Red Hat Enterprise Linux (RHEL), Linux (Kernel), Nagios, Python, DNS, Xen

8/2008 – 10/2008

Development of a Data Scraper/ETL tool written in Python and wxPython GUI
library, with lxml and BeautifulSoup. Application based on an XML-Schema
specification.

ETL, Python, XML

7/2007 – 8/2008

Involved in sales engineering and IT management. Head of 25 people department dedicated to sysadmin, C/C++ development, product development and
consultancy.

Projektleitung / Teamleitung (IT), Software Design, After sales management

1/2004 – 6/2007

Core developer of the Time Oriented Language, an in-house interpreter for Time
Series Analysis. Modernize the initial development of the language, and open
source the project. Adoption of GNU Autotools, Open Source License, new coding
style and development policy. Set-up the tools to allow team members contribute to the development (Bug reporting, mailing lists). Set-up in-house Debian repositories for package distribution to our customer network.

Debian Linux, C++, Linux Entwicklung, Technische Projektleitung / Teamleitung

5/2002 – 12/2003

Founder and developer of Bicio.org, a weblog dedicated to the world of cycling.
Based on CMS PHPNuke. Development of additional plug-in modules for
PHPNuke to manage calendars, events, races and routes. Database layer based
on MySQL. A classic LAMP project.

Mysql, Debian Linux, PHP

6/2000 – 3/2003

Design, implementation, system administration of the project
infrastructure. Java, Java Beans, JSP and Servlets. PostgreSQL. CVS for SCM. Sysadmin to set up development, testing and production environments.
Administration of Internet Services (Domain Name Service, Web server, Email
server, Application Engine, DB Manager). Application Server based on
Apache+Tomcat. DNS self-managed with Bind8. All services running under Linux
(SuSE for Development environment, and Debian for Testing and Production,
with special linux kernel tuning for production environment) running in our own
hardware in the Internet Neutral Node of Madrid.

Postgresql, Java Database Connectivity, Debian Linux, OpenSuse, Apache Tomcat, J2EE, DNS

5/1999 – 5/2005

Training Services for FYCSA (now elogos), Alcatel, Telefonica, OpenAula and
the UPM (Universidad Politecnica de Madrid) in TCP/IP for Unix Administrators,
Linux System Administration, Internet Service Provider based on Linux Systems (DNS and routing), Java Development (J2SE, JDBC, JSP, Servlets and EJB).

Schulung / Training (IT)

10/1997 – 4/1999

Developer for the Suppliers Department. Developing in COBOL and DB2,
scheduling batch processes with JCL, interactive with IMS, running under IBMs
MVS environment.

IBM DB2, COBOL