Valts Darznieks, Developer in Riga, Latvia
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Valts Darznieks

Bio

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

Portfolio

Mobilly
TypeScript, Node.js, Android, iOS, Cordova, Express.js, Firebase, React Native...
Codename Design Inc.
React, CSS, TypeScript, Next.js, Tailwind CSS, JavaScript, Turbo, PostgreSQL...
Tarka Ventures, Inc.
Linkedln, Robotic Process Automation (RPA), Node.js, PostgreSQL, React...

Experience

  • JavaScript - 16 years
  • Web Scraping - 7 years
  • Node.js - 7 years
  • TypeScript - 7 years
  • React - 6 years
  • React Native - 3 years
  • n8n - 2 years

Preferred Environment

WebStorm, OS X, NeoVim Text Editor

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 Engineer | IoT Systems Engineer

2014 - PRESENT
Mobilly
  • Managed and optimized data ingestion pipelines for a fleet of IoT devices, including LPR (License Plate Recognition) cameras, entry/exit barriers, and LED displays.
  • Developed the core engine for a national rail ticketing system, managing complex fare calculations and real-time seat inventory.
  • Managed one of the most popular city service payment apps in Latvia.
  • Engineered the back-end data flows for high-volume EV charging transactions (OCPP).
  • Led as front-end engineer on the national vaccination registration portal.
Technologies: TypeScript, Node.js, Android, iOS, Cordova, Express.js, Firebase, React Native, Front-end, Open Charge Point Protocol (OCPP), FFmpeg, Puppeteer, Automation, React, Internet of Things (IoT)

Full-stack Engineer

2025 - 2026
Codename Design Inc.
  • Helped design and implement an AI-driven learning experience platform focused on automating interactive educational content for children.
  • Built a system to define structured scenes, rules, and success criteria, which were prompt-engineered into dynamic, AI-generated instructional scripts.
  • Contributed to end-to-end pipelines covering content generation, interaction logic, and post-session analysis to support iterative improvement of learning experiences.
Technologies: React, CSS, TypeScript, Next.js, Tailwind CSS, JavaScript, Turbo, PostgreSQL, Prisma, LangChain, Langfuse, Large Language Models (LLMs), Airtable

LinkedIn Automation Developer

2024 - 2025
Tarka Ventures, Inc.
  • Designed and developed an AI-assisted LinkedIn inbox automation platform focused on customer engagement, lead qualification, and outbound response workflows.
  • Implemented intelligent message ingestion and processing pipelines to analyze inbound conversations, connection requests, and engagement signals at scale.
  • Reverse-engineered LinkedIn’s internal messaging and connection flows, operating in a highly adversarial environment with evolving data-obfuscation and anti-automation controls.
Technologies: Linkedln, Robotic Process Automation (RPA), Node.js, PostgreSQL, React, LinkedIn API, LinkedIn Ads, LinkedIn Marketing, LinkedIn Connect, Python, Web Scraping, Puppeteer, Prompt Engineering, Large Language Models (LLMs)

Automation Engineer and Data Scraper

2023 - 2024
Supply Modeling Agency
  • Designed and implemented an automated Twitter engagement and content scheduling system supporting high-volume, multi-account operations.
  • Built scalable data collection pipelines to extract, normalize, and store large volumes of Twitter interaction data for analysis and downstream intelligence use cases.
  • Applied AI techniques to process, classify, and analyze large volumes of Twitter interaction data, transforming raw social data into structured, actionable datasets.
Technologies: Node.js, TypeScript, Web Scraping, Puppeteer, React

Developer

2023 - 2024
Ryze Management Limited
  • Created a system that scrapes large amounts of data from Reddit.
  • Implemented automatic posting on Reddit on a large scale from the cloud.
  • Developed an Electron application that helps generate content to be used for posts.
  • Managed the posting schedule and the Electron application with Airtable API and workflow.
Technologies: Automation, Node.js, Proxies, Scraping, Electron, Web Scraping, Puppeteer, Airtable

Automation Engineer and Data Scraper

2023 - 2023
Ryze Management Limited
  • Scraped large amounts of data from Reddit to be used in the project.
  • Developed automated posting and campaign management system for Reddit.
  • Worked on an internal tool for scheduling tasks for Reddit automation.
Technologies: Automation, Web Scraping, Puppeteer

Android Developer

2013 - 2014
BuzzTale
  • 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: 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 iwiw.hu.
  • Worked on multiple 3D flash social game prototypes.
Technologies: JavaScript, CSS, HTML, Front-end

Full-stack Developer (System Architecture)

2007 - 2009
Bezrindas
  • 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, CSS, .NET, HTML, Front-end

Full-stack Developer

2005 - 2006
Mapon
  • 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, HTML, Front-end

Experience

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.

Skills

Libraries/APIs

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

Tools

n8n, Turbo, Prisma

Languages

JavaScript, HTML, TypeScript, Kotlin, Java, CSS, Python

Frameworks

Next.js, Express.js, Tailwind CSS, Electron, React Native, .NET

Paradigms

Automation

Platforms

Android, Firebase, Zoho CRM, Vercel, iOS, Linkedln, Langfuse

Storage

PostgreSQL

Other

Cordova, Front-end, Zoho Books, Web Scraping, Airtable, Full-stack, Prompt Engineering, Styled-components, Open Charge Point Protocol (OCPP), Zoho, t3, Architecture, Subscriptions, Supabase, LangChain, RAG Systems, Proxies, Scraping, Robotic Process Automation (RPA), LinkedIn Ads, LinkedIn Marketing, LinkedIn Connect, NeoVim Text Editor, Large Language Models (LLMs), Internet of Things (IoT)

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