Valts Darznieks, Developer in Riga, Latvia
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Valts Darznieks

Verified Expert  in Engineering

Software Developer

Riga, Latvia
Toptal Member Since
February 4, 2022

Valts has 14 years of professional experience and has accumulated a large set of skills. His primary focus has always been on UI/UX. He has extensive experience with mobile applications and modern web development and is proficient in back-end technologies as well.


JavaScript, TypeScript, Node.js, Android, iOS, Cordova, Express.js, Firebase...
Android, Java
Amber Games
Flash, HaXe, ActionScript 3, Front-end




Preferred Environment

WebStorm, OS X, Linux

The most amazing...

...thing I've developed is a Latvian national vaccination registration portal with 1.5 million users in the first week. I worked as the lead front-end engineer.

Work Experience

Senior Front-end Engineer | R&D

2014 - PRESENT
  • Led as front-end engineer on the national vaccination registration portal.
  • Developed a national train transportation ticketing system.
  • Managed one of the most popular city service payment apps in Latvia.
  • Worked with Open Charge Point Protocol (OCPP) systems to manage EV charging.
  • Worked on multiple data collection and scraping projects. Have experience also with circumventing many scraping deterrents.
Technologies: JavaScript, TypeScript, Node.js, Android, iOS, Cordova, Express.js, Firebase, React Native, Styled-components, HTML, Front-end, Open Charge Point Protocol (OCPP), Zoho, Zoho API, FFmpeg, Puppeteer, Automation

Android Developer

2013 - 2014
  • Refactored an existing Android application entirely and updated it using the latest technologies and principles.
  • Hosted the application in multiple real-time social events with many users.
  • Managed automated build and deployment processes for the app's front-end stack.
Technologies: Android, Java

Game Developer and Designer

2010 - 2011
Amber Games
  • Worked on multiple games designs documents and pitches.
  • Led a huge social poker game called 8VegaPoker. I was the front-end developer.
  • Launched the FarmVille clone on more than five social networks.
  • Profiled and resolved performance issues for multiple in-house games.
Technologies: Flash, HaXe, ActionScript 3, Front-end

Full-stack and Game Developer

2009 - 2010
Africa Speles
  • Designed and developed the first social game in Latvia with 200,000 active users in the first quarter.
  • Developed a popular friend quiz game in the Hungarian social network
  • Worked on multiple 3D flash social game prototypes.
Technologies: JavaScript, CSS, PHP, Flash, ActionScript 3, HaXe, HTML, Front-end

Full-stack Developer | System Architecture

2007 - 2009
  • Created the first and most popular ticketing system in Latvia, selling public transportation and event tickets.
  • Designed and created a ticket and scanner system for local hockey games and servicing events with over 10,000 people in the Arena Riga.
  • Worked on local Paypal's system and managed security and finances.
Technologies: JavaScript, PHP, CSS, .NET, HTML, Front-end

Full-stack Developer

2005 - 2006
  • Worked on multiple minor in-house tools and systems.
  • Integrated the web's front end with our auto-park tracking hardware.
  • Acquired lots of experience and knowledge about web development. This was my first job.
Technologies: JavaScript, CSS, PHP, HTML, Front-end

National Vaccination Registration Portal
It was a joint effort between multiple organizations, and I was lucky enough to have the chance to work on the project as the lead front-end engineer.

The project was completed in three weeks and had more than one million active users in the first few days.


JavaScript, HTML, TypeScript, Java, HaXe, ActionScript 3, CSS, PHP


React, Puppeteer, Node.js, Zoho API, FFmpeg




Cordova, Front-end, Zoho Books, Styled-components, Open Charge Point Protocol (OCPP), Zoho


Express.js, React Native, .NET


Android, Firebase, Zoho CRM, iOS