Rust Systems Architect - Core Rust, Go & WASM Sandbox

Workato; Amsterdam; On-site; EUR 90,000 - 130,000; Full time

Job summary

Workato is seeking a talented systems/backend engineer to own core language and runtime features for the Expression Language, Data Mapper, and Decision Engine. You will extend the Rust core and embed it inside Ruby and Go services via FFI bindings.

You’ll help expand the Decision Engine to support formulas, contribute to WASM sandboxing, and collaborate with Product and AI teams to shape the platform's next generation.

Qualifications

• Deep hands-on Rust experience at a systems/backend level.
• Production competence in Go.
• Experience embedding Rust as a library inside other runtimes (e.g., Rust-in-Ruby, Rust-in-Go).
• Strong algorithms and data-structures fundamentals.
• Ability to work without a fixed process in a deadline-driven environment.
• Experience with AI-assisted workflows and large-scale systems.
• Excellent technical writing and cross-team communication.

Responsibilities

• Design and build core language and runtime features across Expression Language, Data Mapper, and Decision Engine.
• Own and extend the Rust core, embedding it as a native component inside Ruby and Go services via FFI bindings.
• Help expand Decision Engine from static rules to support formulas.
• Contribute to WASM sandboxing so components run safely and isolated.
• Partner with Product and AI teams to define surface area and expose component capabilities.

Skills

Rust

Go

Rust-in-Ruby

Rust-in-Go

Algorithms & data structures

AI-assisted workflows

Systems engineering

Technical writing

Cross-team collaboration

Mentorship

Tools

Wasmtime

Wasmer

WASM sandboxing

Job description

Workato is seeking a talented systems/backend engineer to own core language and runtime features for the Expression Language, Data Mapper, and Decision Engine. You will extend the Rust core and embed it inside Ruby and Go services via FFI bindings.

You’ll help expand the Decision Engine to support formulas, contribute to WASM sandboxing, and collaborate with Product and AI teams to shape the platform's next generation.