
Andrei Matveev
Verified Expert in Engineering
Software Developer
Toronto, ON, Canada
Toptal member since August 30, 2016
Andrei is a highly skilled full-stack web developer with nearly a decade of experience working across a diverse range of technologies—more than half of which has been in remote environments. Whether collaborating with a team or working independently, he consistently delivers results. Andrei has built strong relationships with clients worldwide, including those from the US, Australia, Kuwait, and Russia, earning a reputation for reliability and expertise.
Portfolio
Experience
- jQuery - 10 years
- ASP.NET - 10 years
- SQL - 10 years
- JavaScript - 10 years
- HTML5 - 10 years
- C# - 10 years
- WebRTC - 4 years
- TypeScript - 2 years
Availability
Preferred Environment
Azure, Microsoft SQL Server, Visual Studio, Windows
The most amazing...
...application I've built was an unfair play detector for a casino (counting cards in Blackjack), that worked by analyzing a video stream from security cameras.
Work Experience
Full-stack Lead Developer
WebStream
- Created a video conference web platform (multiple speakers to many users) with WebRTC/OpenTok.
- Created highly interactive UI during a web conference (conducting polls and surveys, gathering feedback, questions for speakers, providing statistics, working with live users, etc).
- Worked with high-load systems (more than 10,000 simultaneous viewers per conference), optimizing connections and SignalR.
- Developed additional services for this project including an online video editor and online report generator.
Full-stack Web Developer
Veilability
- Converted the site to a single-page application, converting all existing widgets to be flexible and Ajax-ified.
- Created a fully responsive UI suitable for all mobile devices.
- Developed high-load reports based on lots of cross-referenced data and heavy-load search requests, making optimization of data storage and complex SQL functions and stored procedures.
- Added new widgets and functionality. Interacted with third parties (payment services, invoices management services, mail services, etc).
Full-stack Developer, Lead Developer
CamGoals
- Created a full-scale social network from scratch. The whole social network is done as an SPA with all visual interactions created using adjustable widgets.
- Used websockets for real-time widgets (chat, money transfers, media sharing, etc.).
- Created a mobile version and made it stable for all platforms and browsers.
- Created a one-to-one video chat and one-to-many video broadcasting based on WebRTC technology. Constantly improved the video chat, adapting it to current changes in WebRTC.
- Worked in a high-load system (hundreds of users on site and subscribed to videos).
Front-end Developer
Bilbayt
- Created a UI suitable for both LTR (English) and RTL (Arabic), with all custom controls designed to be rendered in both modes.
- Built the whole online shopping procedure, from picking products to checkout.
- Made a mobile version for an already existing website suitable for all platforms and browsers.
- Improved the mobile application with new changes.
Front-end Web Developer
Masfish
- Created a web interface for an online browser game.
- Created a multi-platform-supporting interface, working stable on all platforms and all browsers.
- Worked with a lot of client-side optimization, implementing fast JavaScript algorithms to improve performance.
- Did a lot of PSD to HTML conversions.
- Worked with a fully distributed team.
Team Leader, Full-stack Web Developer
Great, LLC
- Created a cross-platform web service for conducting online surveys.
- Used MS Azure's full stack (database, bus, storage, etc.).
- Created multipurpose video streaming software for multiple devices, utilizing video stream editing, synchronizing, and redirecting to output devices.
- Created an online service used by a whole country (Russia), ensuring stability working with bogged data and big loads.
- Managed a team of five developers working remotely.
Full-stack Web Developer
SmartTouch Interactive
- Worked with several customers from different countries (mainly the USA).
- Created a wide variety of different web applications on different technologies.
- Created a full-scale social network capable of handling a big load of users.
- Worked with projects that had unspecific technical details but strict deadlines. Learned how to do it "the best way" when the client does not know exactly what they want.
Team Leader, Desktop Developer
CrossShore
- Created a full-scale application for a casino, used to detect card counters in blackjack. It was a huge project, gathering images from security cameras, recognizing objects, and maintaining their game strategies to detect "counting."
- Worked with video recognition software and machine learning. Switched to low-level libraries (OpenCV, C++) to get better performance, since camera resolutions were very high and the system was not able to recognize objects in real-time.
- Achieved 99.4% object recognition by implementing machine learning and training it by "watching" a series of game moves. The system was able to successfully recognize all cards (suits and value), money and chips, and auxiliary objects (dealer's hands, etc.), and to track moving objects from one zone to another.
- Implemented all known strategies for the game of blackjack. This is a huge work with lots of algorithms. Then all players are assessed against these strategies.
Experience
Card Counting
The service, built in the form of a desktop application, obtains images of a gaming table from a few high-resolution cameras and performs full game monitoring.
We used different techniques for object recognition, like card value/suit, chips, cash, dealer’s hands, and other unrelated objects (based on OpenCV and SentiSight libraries). Then we processed the data, performing gameplay process simulation. After that, we applied all existing gaming and counting strategies to the processed data and compared them to the current player's behavior. Thus, we can tell if any of players is following some of these strategies.
As a result, the first two stages of the project were completed and we obtained almost 100% recognition quality; we were getting correct game status (if someone is winning or not) and could definitely tell if the player was counting.
StreamCart
http://webstream.streamcart.com/CamGoals
Veilability
https://www.veilability.com.au/Bilbayt
https://bilbayt.comCodingGame
https://www.codingame.com/profile/1460dfef05db61650e306a9dffbf801a267614Education
Master's Degree in Computer Science
Ural Federal University - Yekaterinburg, Russia
Bachelor's Degree in English Language
Ural Federal University - Yekaterinburg, Russia
Skills
Libraries/APIs
Google Maps, FFmpeg, WebRTC, Web API, jQuery UI, jQuery, TensorFlow, React, SignalR, Socket.IO, Mailchimp API, Xero API, OpenCV, Sockets, Node.js
Tools
SQL Management Studio, Visual Studio .NET, Visual Studio, Microsoft Silverlight, C#.NET WinForms, Wowza, Git, Mailchimp, IntelliJ IDEA, Bitbucket, Adobe Photoshop
Languages
HTML, XML, SQL, Less, Sass, HTML5, Active Server Pages (ASP), JavaScript, ECMAScript (ES6), C#, CSS, TypeScript, C++
Frameworks
ASP.NET, Newtonsoft JSON, ASP.NET Web API, Entity 6, .NET, AngularJS, Angular
Paradigms
Agile, REST, Concurrent Programming, Unit Testing, Code First, Model View Controller (MVC)
Platforms
Android, Azure, Visual Studio Code (VS Code), Windows, Amazon Web Services (AWS), OpenTok, Web
Storage
JSON, Azure Cloud Services, Microsoft SQL Server, OpenXML, MongoDB, Amazon S3 (AWS S3), Azure SQL, Azure Blobs
Other
Front-end, Optimization, APIs, Live Chat, Single-page Applications (SPAs), Social Networks Development, Apps, Big Data, Client-server Model, Azure Service Bus, Freelancing, Back-end, WebSockets, RTL, Right-to-Left (RTL) Scripts, HTML5 Video, Ajax, Evolutionary Algorithms, Genetic Algorithms, Web Services, Web Map Services (WMS), STUN/TURN, Machine Learning, Pattern Recognition
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