Resume

co-developer of a web application for managing software vulnerabities and patches. Added new features to both frontend and backend, bugfixes, maintenance, documentation, code reviews, testing. (Python 3, Django, REST APIs, React, Chart.js, Javascript, AWS, Postgres)

Implemented new features and bug fixes for various parts of the Flight Vector software, including:

• a web-based dashboard to monitor flight status (Javascript, C++, C#)
• a web application to submit and edit forms, to be filled out by customers; many of these forms were highly detailed, contained summaries and had complex data validation rules. The app itself also let admins manage users and permissions. (client: Javascript with Closure library, soy templates; backend: Rust and Node)
• a desktop application for submitting, watching and managing detailed flight requests (C++)

Co-developer and maintainer of the Klickle customer app for Android. This included bug fixing, enhancements, and designing and implementing new screens from scratch; also testing features and performance on various Android devices. Technologies used include Android, C#/Mono and Xamarin.Forms.

Main developer of a complex server-side system for processing work orders ("tickets"), that the customer receives from call centers. This included writing console applications in Python that:

• receive incoming tickets via modem, FTP or email;
• parse and extract information from the tickets (these are in plain text or XML, and vary greatly in format), and store it in the database (MS SQL Server);
• assign them to employees, based on a set of complicated business logic rules that differ per call center ("routing");
• respond to the call center that sent the tickets, via FTP, telnet, email and XMLHTTP;
• check the system regularly to see whether it's behind in processing of tickets, sending responses, etc
• retrieve the latest code from our subversion/git repositories and deploy it on the customer's server in a safe manner (this was later replaced by a build/deploy process using Jenkins).

Additionally, the Python code base is supported by a large set of automated tests. All of these programs and tests were written and maintained by me, except for a 2-year interval when I worked for a different employer.

The system uses a MS SQL Server database, which we originally accessed via SQLXML, later switching to ADO for performance reasons, using a custom ORM. The server-side programs run on Windows. In the first few years, I also helped maintaining and updating the client, admin and reporting applications, all of which are written in Delphi. At some point I ported most of the existing code to IronPython.

As the project matured, I worked on a team with other developers to keep the code base up-to-date and well-maintained. This involved code reviews, writing documentation and project management using JIRA. Additionally, I mentored other Python developers who joined the team.

2-month contracting job, consisting of:

• translating an MS SQL Server database to Postgres (tables, views, stored procedures, functions);
• writing scripts to automate the creation of the new database, and populating it from CSV dumps;
• optimizing database performance.

Main developer of the back-end part of the iTrackr website. Tasks included:

• implementing and maintaining web crawlers in Python to fetch product and store availability data from retailer websites
• writing custom parsers to extract the desired information from the retrieved web pages
• implementing daemons and scripts to send notifications to users (email, SMS and web)
• maintaining and extending the XML-RPC server used to pass store/product data to the server
• database maintenance (first MySQL, later Postgres); this included adding/updating tables, triggers, indexes for performance tuning, etc
• implementing queries using SQLAlchemy
• updating the website (Pylons, Javascript, jQuery, CSS)

I developed four large desktop applications, and was also responsible for their maintenance and related customer service.

• Co-author of a management system for safety equipment, for a large chemical company. Developed interfaces to specialized hardware such as card printers, barcode scanners, and hand-held terminals. Written in Delphi, backed by an Oracle database.
• Main developer of a sophisticated system for registration and management of credit limits, written as a three-tier application in Delphi and SQL Server (using MIDAS). This included a "decision support" form that helped users when granting new credit limits; also included an interface to a large online documentation system, and a flexible report generator. Developed an intranet interface later, using ASP/VBScript. (letter of recommendation from this customer)
• Main developer of a system for the registration and statistical analysis of accidents, again for a large chemical company. Delphi/SQL Server.
• Main developer of a system for specialized allocation of costs, for a bus company. Delphi/Access, with some Python integrated.