Oleg Pryadko

Summary:

• Became the lead (often solo) developer for a complex, in-house Python framework (ERP/ ORM/ MVC/ APIs/ services) and the systems built on it. 
• Developed dozens of Python/ Linux daemons, scripts, components, libraries, and integrations.
• Assisted with developing drivers, installers, packages, and microservices for embedded boards (SMIBs) running a custom Linux distro.
• Provided developer training and support, Linux server administration, web/ UI/ animation design, and other tasks as needed.
   

Designed and developed Python system components, including:

• A new slot machine player tracking and rewards system that uses MDNS, persistent sockets, and RPC to control embedded Linux boards with animated touch-screen displays, card readers, and slot machine serial interfaces.
  • Challenges included optimizing large data sets and streams, a complex state machine with concurrent events, synchronizing state/ data changes with remote display animations, and integration with changing external components.
• A custom unit test framework for ORM functions that required a real database and full system initialization. 
  • Challenges included ignoring commits, synchronously running threaded and asynchronous functions, and restoring the configuration and global environment after each test.
• A library that allowed the same functions to be used with different types of main loops (asyncio, GLib, gbulb, and legacy GTK).
• A custom XML/ ECMAScript file format to allow non-Python developers to configure complex business logic. The format supports unit tests, IDE syntax highlighting, and schema validation.
• User interfaces for runtime configuration and administration of logging, timing, connections, etc....
• User interfaces for auditing and adjusting massive PostgreSQL data sets gathered from slot machines and player sessions.
• A GUI report generator that allowed non-developers to create custom PDF reports on a legacy database using ODF file templates and MSSQL query templates. 
• Custom JSON-RPC APIs for integration with legacy systems.

 
Refactored and improved existing Python code base:

• Troubleshooted, cleaned, and improved complex, undocumented code.
• Migrated software from Python 2 to Python 3.
• Improved and expanded existing XML-RPC & JSON-RPC APIs.
• Wrote unit and functional tests.
• Bridged and adapted software to use a custom in-house RPC library.

 
Other duties:

• Trained, supported, and assisted other developers.
• Hired, trained, and supervised subcontractors.
• Configured and maintained Linux development servers.
• Resolved miscommunications between colleagues.
• Worked with clients and testing labs to pass certifications.
• Wrote documentation and how-to articles.
• Created graphic and web design to showcase products.
• Designed user interfaces for touch screens and administration tools.

 
Main technologies: Python, PostgreSQL, Linux

Supporting technologies: MDNS/ Avahi, Bash, Apache, Mikrotik, ODBC, Perl, C/ C++, WAMP/ Crossbar, GLib, GTK+, Qt, OpenWRT, GRUB, SSH, PXE (network boot), VNC, Linux tools, systemd, asyncio, ECMAScript, XML/ schemas, JSON/ RPC/ APIs
 

Worked with the owner of Go Automation, who is also the lead embedded developer for Casinfo Systems, in developing custom software for a vending machine distributor.

• Led a small team of remote contractors in creating a custom vending machine management platform using Odoo (a Python ERP framework). 
• Implemented an animated, touch-screen vending machine customer interface on top of Python microservices in embedded Linux boards.
• Designed and implemented an API to allow the central Odoo server to securely pull data from and push configuration and software packages to the remote embedded boards.
    

Main technologies: Python, Odoo, PostgreSQL, MongoDB, WAMP/ Crossbar, Linux

Supporting technologies: ECMAScript 6, NodeJS, XML/ schemas, Qt, networking, SVN, RPC, ORM
 

Offered specialty consulting for MODX, an open-source PHP web framework.

• Provided emergency support and custom module development for MODX websites.
• Provided management, developer training, and support for MODX-based projects.
• Hired, trained, and supervised subcontractors.
• Configured and maintained Linux servers.
• Released open source components and contributed to MODX framework development.
   

Recent clients: Blue Mountain Center of Meditation 2013-2019, Education Law Center 2017-2018

Main technologies: Linux, Apache, PHP, MySQL, MODX, HTML, SASS/ CSS, JavaScript

Supporting technologies: Python, Photoshop, e-commerce, various APIs (e.g. Google Drive, Vimeo, Dropbox, payment gateways, ...), ORM, git, CPanel, Apache, NGINX, Bind, AWS (mainly S3 & EC2)
 

Designed and built custom, dynamic websites for dozens of small business and e-commerce clients. Provided full-stack web development (Linux/ Apache/ MySQL/ PHP/ JavaScript/ HTML5), custom graphic design, wireframing, requirements gathering, and end-user training.