There are many companies you can look up to for employment that use these technologies. Some of the popular ones include PayPal, Verizon, LinkedIn, Forbes, Netflix, eBay, Uber, Trello, Expedia, Bosch, EA, Cisco, Google, Adobe, and many others.
For example, React Native was used to develop mobile applications such as Facebook, Instagram, Coinbase, Shopify, Oculus, FlipKart, Nerdwallet, Pinterest, Bloomberg, Tesla, Skype, Discord, Salesforce, Walmart, Wix, Vogue, and many others.
Electron.js is very popular, and it was used to develop desktop applications such as Visual Studio Code, Whatsapp, TwitterTron, QuickRedis, Figma, Twitch, Facebook Messenger, Microsoft Teams, WordPress, Slack, Pexels, Poddycast, and many others.
TensorFlow.js is popular and has been used for projects such as LipSync by Youtube, Webcam Controller, Emoji Scavenger Hunt, Teachable Machine, Performance RNN, Move Mirror, Pitch Prediction, Visualize Model Training, and many others.
Further, you can seek jobs as an Augmented Reality or Virtual Reality developer. You can use a library like AR.js, which is a lightweight library for Augmented Reality on the Web, it is packed with features such as Image Tracking, Location-based AR, and Marker tracking.
You also use A-Frame, a web framework for building 3D, Augmented Reality, and Virtual Reality experience for, Desktop, mobile, and other VR platforms.
You must also make sure that you learn Data structures and Algorithms. Most, if not all major tech companies require a good understanding of data structures and algorithms.