Who you are

- 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

- 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

What the job involves

- 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

- 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

Benefits

- Versátil Working Arrangements: We maintain a hybrid remote work model and provide everyone with best of breed technology tools that enable them to work anywhere, anytime.

- Great Employee Benefits: Such as an Employee Assistance Programme (EAP), Health Insurance, Referral Bonuses, and Workato Stock Options, tailored to the countries that our employees are based in.

- Professional Development Opportunities: We support individual career ambitions, and set aside training programs and budgets they can tap on to upgrade both soft and hard skills.

- Dedicated Wellness: We make it a point to dedicate time to pause, recharge and get to know each other better.

- Recreation Time: From virtual game nights to fitness sessions, there's always time for a little fun on the calendars.

📌 System Architect (Barcelona)
🏢 Workato
📍 Barcelona