We are looking for a Senior Rust Developer to join a long-term project focused on developing production-grade solutions combining Rust, C and Qt 6.
The main focus of the role will be on developing high-quality Rust code, with particular emphasis on object models, memory safety, type systems, procedural macros, and safe APIs across the Rust/C boundary.
|The team works with a public backlog, with tasks assigned issue by issue and re-planned on a sprint basis. The role offers the opportunity to work on challenging systems-level problems in a review-driven engineering environment.

The initial priorities will include:

• Object model and memory-safety work
• Type-system development
• Procedural macros
• Rust/C FFI
• Public API design and stabilisation

Responsibilities:

• Develop production-quality Rust code and, where required, C code
• Design and maintain idiomatic, safe Rust APIs
• Build safe Rust wrappers around existing C functionality
• Work with Rust ↔ C FFI, ideally using cxx
• Develop and maintain procedural macros using syn, quote and proc-macro2
• Provide high-quality compile-time diagnostics for procedural macros
• Work with ownership, lifetimes and object lifetime management across the Rust/C boundary
• Design and stabilise public library APIs, taking into account semver, deprecations and breaking changes
• Maintain cross-platform Rust builds across Linux, Windows/MSVC and macOS
• Write tests alongside every change
• Maintain documentation and rustdoc for public APIs
• Participate in code reviews using Gerrit
• Follow a small-commit, review-heavy development workflow
• Contribute to security reviews and threat modelling for a systems-level library
• Analyse memory-safety and trust-boundary risks across the Rust/C FFI surface
• Collaborate with the team responsible for the Qt/C layer

Requirements:

Must-have

• Senior-level professional experience with Rust, including strong knowledge of: ownership and borrowing, Rc, RefCell, Weak, unsafe and Rust aliasing rules, Pin, lifetime-parameterised APIs
• Hands-on experience with Rust/C FFI, preferably using cxx
• Experience designing safe Rust abstractions and wrappers over C code, including object lifetime management
• Practical experience with procedural macros, including syn, quote and proc-macro2
• Experience designing and maintaining public Rust library APIs
• Strong understanding of semver, breaking-change management and deprecation strategies

• Experience with cross-platform Rust build engineering, including:
  • build.rs,
  • linking against native libraries,
  • Linux,
  • Windows/MSVC,
  • macOS.
• Strong engineering and quality discipline:
  • tests with every change,
  • cargo fmt clean,
  • no new Clippy warnings,
  • documented safety rationale for any new unsafe code,
  • rustdoc for all public APIs.
• Experience with threat modelling and security reviews for systems-level software
• Ability to reason about memory safety and trust boundaries across Rust/C FFI
• Working knowledge of Qt 6, including:
  • QObject,
  • properties,
  • signals/slots,
  • QVariant,
  • QMetaType,
  • QML object ownership.
• C 17 knowledge sufficient to read and modify the bridge layer
• Comfortable working with Gerrit, small commits and review-heavy development processes
• Professional written and spoken English

Nice to have:

• Previous contributions to Qt, CXX-Qt, qmetaobject-rs or similar binding projects
• QML / Qt Quick application development experience
• Experience publishing and maintaining crates on crates.io
• Knowledge of rcc and Qt resource handling
• Experience with QML debug/preview protocols
• Experience with async Rust / Tokio integrated with a native event loop
• Existing Qt Account and signed Qt Contributor Licence Agreement

Our Offer:

• Location: 100% Remote
• Start date: As soon as possible
• Project duration: 6 months, with the possibility of extension for another 6 months
• Rate: up to PLN 150/hour
• Working hours: Remote
• Own equipment
• Access to Medicover Zdrowie and Medicover Sport cards