Overview

Smart contracts are not secure enough for finance, law, or systems engineering.

Smart contracts are security-critical, performance-sensitive, and bug-prone. Heliax is working on a dependently-typed smart contract language, Juvix, which utilises recent advancements in type theory to allow developers to write code in a high-level functional language, compile it to WASM and/or to arithmetic circuits, and formally verify the safety of their contracts prior to deployment & execution.

PLT at Heliax focuses on applying the latest research in type theory and programming language design to concrete problems in the distributed ledger space. We are looking for a functional compiler engineer to work on various parts of the Juvix stack, all the way from optimising inlining heuristics in the core compiler passes to using Juvix s granular linearity information in order to write an efficient LLVM compilation backend.

This role offers the chance to work closely with a small team on compelling cross-disciplinary problems in computer science, PLT, cryptography, and economics, and enjoy a high degree of independence in working conditions and prioritisation.

Responsibilities

Take responsibility for identifying and implementing features in the LLVM compiler
Produce formal specifications and implementation plans for new language features in collaboration with team members (and optionally submit to academic venues)
Evaluate correctness, suitability, and ease-of-implementation of published PLT and compiler engineering research for the Juvix architecture & project aims
Implement both in-house and published research in Haskell in the Juvix codebase in collaboration with team members
Conduct code reviews and help maintain a high standard of correctness and quality
Conduct benchmarks of Juvix output code and adjust both the compiler architecture and details of specific passes to optimise its performance while retaining correctness
Comprehensively document both design and implementation choices in the codebase, and assist in writing user-facing documentation for the Juvix language

Main Project

Juvix

Qualifications

Prior experience in LLVM development
Prior experience in compiler development and design
Prior experience in a typed, functional programming such as Haskell, Idris, Agda, or Coq
Self-motivated & self-organised
Interested in open-source technology and research applied to DLT

Bonus Qualifications

Prior academic work in type theory, PLT, or compiler design
Prior academic work in cryptography, economics, or game theory
Familiarity with Rust

Misc

Remote or local (Z rich/Zug, Berlin).
When remote, preferred if mostly located within (+/- 7 hours) Central European time zones.
Ideally someone who enjoys nature and hiking .

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