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# Software and System Architect

- **Company:** Workato
- **Location:** Madrid, Spain (Remote available)
- **Salary:** €60,000.0 - €90,000.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Encodings, Data Transformation, Data Structures, Systems Analysis, JSON, Open Source Technology, Scrum Methodology, Ruby, Systems Architecture, Data Processing, Event Processing Language, Zapier, Backend, Build Management
- **Published:** July 30, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

+ Deep, hands-on Rust experience at a systems/backend level.
 + Working competence in Go - real production ability, though not necessarily your primary language.
 + Proven experience embedding Rust as a library or native extension inside another language's runtime (e.g. Rust-in-Ruby, Rust-in-Go).
 + Strong algorithms and data-structures fundamentals (sorting, trees, data processing).
 + Comfort operating without a fixed process methodology, in a deadline-driven, cross-team environment.
 + Experience with AI-assisted workflows, particularly in system analysis and hunting for inconsistencies and corner cases.
 + Scale: Experience with systems handling millions of requests/events per day.
 + Exceptional technical writing and communication abilities for diverse audiences.
 + Experience planning phased implementations and leading complex cross-team projects.
 + Proven track record with feature flags, gradual rollouts, and zero-downtime deployments.
 + Ability to facilitate architectural decision-making and create technical roadmaps.
 + Mentorship mindset and cost analysis capabilities.
Nice to Have

 + Compiler engineering experience - a strong plus.
 + WASM/sandboxing experience (Wasmtime, Wasmer, WASI, or similar).
 + Familiarity with data-format standards/RFCs (JSON, Unicode).
 + Awareness of project-cycle practices (Scrum/waterfall) and testing discipline.
 + Community: open source contributions, conference speaking, technical writing.

## Description

Engine team owns three components used company-wide: Workato Expression Language (our original mini-language for data transformation in recipes), Data Mapper (a new, UI-oriented mapping and format-transformation component), and Decision Engine (a rules component, currently static-only, being expanded to support formulas). The stack is a Rust core with WASM sandboxing per component, with bindings into Ruby and GO.
In this role, you will also be responsible to:

 + Design and build core language and runtime features across the 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 each component runs safely isolated from the others.
 + Partner closely with Product and with the AI team on what these components need to expose.


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