Intern Software Engineer - Compilers (WebAssembly) - Amsterdam [two positions]

Work Type: Internship

Do you want to work at the cutting edge of browser technologies? Are you interested in working on Development Tools?

Join our engineering team, where you will be working on the next generation of compilers and virtual machines that target HTML5/WebAssembly, contributing to our vision of bringing any application to the Web.  We are looking for an enthusiastic developer-to-be, interested in joining a very dynamic and rapidly growing specialist software company developing WebAssembly solutions.

This is a full-time internship position with a duration of 6 months, based in Amsterdam, Netherlands. After these internship positions, which are opened on a regular basis, we offer to best performers full-time positions as a Software Engineer, for which we can consider both full-time and part-time arrangements, compatible with a return to further studies.

Two positions are available starting from September 2023, with a flexible start date.

What we offer

This post is for a full-time position based in our office in Amsterdam (near Amstel Station), Netherlands. 

  • Flexibility and part-remote work is guaranteed to all employees;
  • Join a team of incredibly talented minds, in a position with the opportunities for personal and professional growth are plenty

  • Get to work on challenging, complex and stimulating projects

  • You will work with our CTO and other developers, and get 1-1 tutoring and guidance from the rest of the team. We have very minimal overhead, a flat structure, and we prefer to get to work rather than spend hours in meetings.

  • We offer high flexibility, family-friendly arrangements, and actively promote a good work-life balance.

What you will be doing

  • You will put your C++ knowledge into practice by contributing to the development of our WebAssembly/JavaScript-targeting tools (compilers and VMs)
  • In particular, you will be contributing to Cheerp, a C++-to-WebAssembly and JavaScript compiler. Cheerp is a powerful, low-level WebAssembly development tool used by commercial customers, as well as being the core foundational technology of all the Leaning Technologies stack.

  • Each internship position will be focusing on one core development project, to be driven by the intern, under the 1-1 supervision of a senior developer
    • Project 1: Introduction of TypeScript support in Cheerp. On one side, you will develop a new component of Cheerp that automatically generates TypeScript annotations for C++ APIs exposed to WebAssembly/JavaScript by the compiler. On the other side, you will develop a tool to generate namespace client C++ header files from public TypeScript declarations, allowing JavaScript libraries and Web APIs to be more easily integrated in Cheerp workflows.
    • Project 2: Introduce support for AddressSanitizer in Cheerp. AddressSanitizer is a compiler technology that exposes many hard-to-find bugs and would have extensive internal and external value if supported in Cheerp. Other sanitizers might be explored time permitting.


  • Being enrolled in a BSc/MSc in Computer Science or equivalent, ideally in the last year. Enrolment in alternative programs, such as bootcamps, or working experience in alternative will also be considered.

  • Some practical C/C++ development experience (including University projects) is required

  • Understanding of object-oriented design principles

  • Residence and right to work in the Netherlands

About Leaning Technologies

Leaning Technologies ( makes WebAssembly tools to run software on any browser. 

We make solutions that enable C/C++, Java, Flash, and native Linux applications to be compiled, emulated and virtualised into HTML5/WebAssembly. Our tools are used to develop high-performance web apps in ‘traditional’ programming languages, to port existing code to the Web, or to preserve accessibility to legacy applications by converting/emulating them to HTML5. We have a global client base including multiple Fortune-100 companies and public sector organisations, in sectors including financial services, CAD software, HR and operations, logistics, defence and aerospace, retail, science and education, and videogames.

Our incredibly talented, tight-knit team works from different locations with a hybrid remote/office approach. Our main offices are Leeds, United Kingdom and Amsterdam, The Netherlands. We value a great, informal work environment, high flexibility, and having genuine fun and excitement every day at work.

Want to see what it is all about? Join our Discord and have a chat with our developers!

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