Juvix synthesizes a high-level frontend syntax, dependent-linearly-typed core language, whole-program optimisation system, and backend-swappable execution model into a single unified stack for writing formally verifiable, efficiently executable smart contracts which can be deployed to a variety of distributed ledgers. Juvix is designed to address the problems that we have experienced while trying to write & deploy decentralised applications and that we observe in the ecosystem at large: the difficulty of effective verification, the ceiling of compositional complexity, the illegibility of execution costs, and the lock-in to particular backends. In order to do so, Juvix draws upon and aims to productionise a deep reservoir of prior academic research in programming language design & type theory which we believe has a high degree of applicability to these problems. Juvix's compiler architecture is purpose-built from the ground up for the particular requirements and economic trade-offs of the smart contract use case — it prioritises behavioural verifiability, semantic precision, and output code efficiency over compilation speed, syntactical familiarity, and backwards compatibility with existing blockchain virtual machines.