Programming firmware for microcontrollers in embedded devices is often considered challenging and laborious. Most embedded applications are reactive and asynchronous systems. Asynchronicity is laborious and cumbersome to express in the low-level languages (e.g., C) that are often the manufacturers' only supported way of programming the microcontrollers. Therefore, most of the often simple application high-level logic is hidden in a boilerplate code. Using high-level languages such as C++ or Rust, on the other hand, introduce very long compilation times that unbearably prolong the code-build-deploy-test development cycle. Additionally, there is the cost of a non-trivial toolchain setup. We can tackle these difficulties by using an interpreted language instead. The goal of the thesis is to develop a solution for running Typescript programs on a reasonably-sized microcontroller such as Espressif ESP32. The student should port a suitable Javascript interpreter on the ESP32 platform and build an ecosystem around it. The ecosystem should allow for: - running Typescript and Javascript programs stored in microcontroller flash memory, - uploading these programs into the microcontroller, - capturing the user program's output, and - binding between native code (e.g., peripheral drivers) and the user program. The design of the ecosystem should be flexible enough so that the solution can be deployed to various hardware configurations. Also, the ecosystem should be supported by suitable development tooling. The student should also experimentally evaluate the performance and user-friendliness of the presented solution compared to native programs. The whole solution should be demonstrated several "getting-started" examples.