Simanas Venčkauskas, Developer in Kaunas, Kaunas County, Lithuania
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Simanas Venčkauskas

Verified Expert  in Engineering

Software Developer

Kaunas, Kaunas County, Lithuania
Toptal Member Since
September 11, 2013

Simanas is a passionate developer, entrepreneur, and business analyst who excels at utilizing latest artificial intelligence techniques to deliver top-quality software solutions in the shortest period of time.


TensorFlow, TensorFlow Deep Learning Library (TFLearn), Python, Django...
Bikeparts LT, UAB
Python, Django, JavaScript, Linux
Shorebreak Security, LLC
Linux, Git, Continuous Integration (CI), Test-driven Development (TDD)...




Preferred Environment

Python, Git, Linux

The most amazing...

...thing that I ever created is an artificial intelligence for sound that separates vocals from any given song with outstanding precision

Work Experience


2017 - PRESENT
  • Created world-first AI-powered vocal remover using latest and greatest AI techniques.
  • Evolved vocal remover into stems maker, which can separate not only vocals, but also drums, bass, and other instruments out of any given audio track.
  • Came up with an idea and fully realized it, and now it serves thousands of music professionals and lovers all around the world.
Technologies: TensorFlow, TensorFlow Deep Learning Library (TFLearn), Python, Django, PostgreSQL, Linux, JavaScript

Software Architect/Lead Developer

2016 - 2018
Bikeparts LT, UAB
  • Developed Django-powered eCommerce website which is capable of selling large amounts of products.
  • Developed a unique technique to recognize motorcycle parts and to be assigned to specific models.
  • Integrated eCommerce stock with many different parts suppliers across Europe.
Technologies: Python, Django, JavaScript, Linux

Software Architect | Lead Developer

2014 - 2017
Shorebreak Security, LLC
  • Built a cloud-based software application used by professional penetration testers to continuously scan ultimate organizations for potential vulnerabilities, provide fixing suggestions, verify fixes, and communicate efficiently.
  • Built a separate scanner agent which can be installed on any Linux machine, plugged into any internal network, and then utilized remotely via the main application interface to scan that internal network.
  • Gained a tremendous amount of knowledge on cybersecurity and penetration testing.
  • Trained staff members on various open source technologies.
Technologies: Linux, Git, Continuous Integration (CI), Test-driven Development (TDD), PostgreSQL, RabbitMQ, Redis, Celery, Django, Python

Developer | Business Analyst

2009 - 2017
  • Developed a custom ERP system based on Django-Xadmin for one of the leading insurance companies in Lithuania.
  • Developed a news aggregation website for the pharma industry based on Django, Backbone.js, and Solr.
  • Made a lot of various customizations for existing Django-based websites.
  • Contributed to various PythonandDjango-based projects on my own or with others.
Technologies: C++, Java, Flash ActionScript, HTML5, Django, Python

Platform Architect, Lead/Master Developer

2013 - 2014
Networld Media Group (via Toptal)
  • Redesigned and reworked the core business tool from ground zero, a news publishing platform hosting an unlimited number of news sites (twelve currently), using cutting-edge technologies and techniques.
  • Accomplished all goals in just seven months while leading and teaching a team of ex-PHP developers.
  • Successfully migrated a high-scale database to the new, performance-oriented database.
Technologies: Git, Supervisory, Celery, PostgreSQL, Bootstrap, Django, Python

Platform Architect/Developer

2013 - 2013
Startgrid, Inc. (; via Toptal)
  • Designed and implemented the core structure of a platform.
  • Designed and implemented social networks based on auth system, user permissions, and roles.
  • Advised on future development and scaling.
Technologies: Git, Test-driven Development (TDD), AngularJS, Bootstrap, Django, Python

Developer, Consultant

2013 - 2013
  • Developed an application for a real estate company for printing custom reports of estates on sale.
  • Developed SEO strategy and website for
Technologies: HTML5, JavaScript, Django, Python

Developer, Business Analyst, Manager

2012 - 2013
HBee, Ltd.
  • Developed a reusable OpenERP SaaS web platform based on Django framework.
  • Worked on OpenERP custom integrations starting from business analysis up to custom development.
  • Created OpenERP introductory video tutorials.
Technologies: JavaScript, Python, OpenERP, Django

CEO, Founder

2006 - 2012
UAB Mantijų Karalius
  • Developed a company from idea to constant business, serving over 20,000 graduates every year.
  • Designed and developed a custom order management system to increase business efficiency and profit.
  • Designed and developed websites,,, and
Technologies: HTML, PHP

CEO, Founder

2009 - 2010
GRAFICO LT, UAB. Lenticular Printing
  • Implemented a number of marketing projects for European companies. Various product lines were supplied for supermarkets: Notepads, postcards, etc. (
Technologies: Printing

CEO, Founder

2008 - 2009
UAB “Korepetitorių Centras”
  • Coached children to help them achieve better results at school at the leading kids coaching center in Vilnius, Lithuania.
  • Designed and programmed a schedule management system for internal use.
Technologies: Microsoft Access, PHP

CEO, Founder

2007 - 2008
  • Designed an online shipment system where every courier in the town is monitored via GPS. All new shipments were automatically assigned to couriers while evaluating their workload, distance to pickup, delivery address, current route, etc.
Technologies: GIS

Sales Manager

2007 - 2008
  • Created professional printed presentations for Lithuanian companies and manufactures including Baltic Furniture Group, Molesta, Atrama, and Betula.

PhonicMind - Artificial Intelligence for Sound

This is one of my first highly successful projects employing artificial intelligence.

I was raised by mom, dad, music, and computers, so I feel like this is an outcome of my entire life path. It works incredibly great and I am having a lot of fun by working on this project. It's awesome!

Lifeguard is our continuous penetration testing service that allows us to manage risk daily because waiting a year or more to detect and manage vulnerabilities isn't working.

Django-based eCommerce site.

Networld Media Group News Platform

These are just a few of the sites hosted by one high-scale news publishing platform which I had the pleasure to build.
Contributed to this project at its early development stage. Designed and implemented the core structure of a platform, social networks based auth system, user permissions, and roles. Advised on future development and scaling.


Modern website based on Django.


OpenERP reusable SaaS platform and website. Technologies used: SSL, bottle rest servers, Supervisord, Mezzanine, Celery, etc. Tutorials prepared by me.

Made contributions to this project.


Although I do not see myself as a designer, I created everything here from the idea to the design of Flash templates. I have gained significant knowledge of ActionScript by developing this project.

Highly advanced orders management system for my previous company Mantijų Karalius. Seven types of users (anonymous, higher school participant, head of participant group, photographer, designer, administrator, and super user) to bring graduation photography and social networking experience together.

Question Pools Platform
Highly scalable system for psychologists to create different types of questions and task pools.


Simple small client-side app based on Backbone/Marionette, Twitter Bootstrap 3 (works great on smartphones) and Django REST framework.

Codility Certificate
Codility Silver Certificate with a score of 90/100.
2006 - 2008

Bachelour Degree in Business Management

ISM University of Management and Economics - Vilnius, Lithuania

2004 - 2006

Bachelour Degree in Audiovisual arts engineer and artist.

Kaunas Technology University - Kaunas


TensorFlow, jQuery, TensorFlow Deep Learning Library (TFLearn)


Git, Elastic, Microsoft Access, GIS, Celery, RabbitMQ


Django, Bootstrap, AngularJS


Python, SQL, JavaScript, ActionScript 3, HTML5, Flash ActionScript, PHP, HTML, C++, C, Java, Bash Script


Continuous Integration (CI), Test-driven Development (TDD), Agile Software Development


Linux, OpenERP, Twitter


PostgreSQL, Redis


Artificial Intelligence (AI), Enterprise Resource Planning (ERP), Freelancing, Printing, Supervisory

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