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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Infrastructure Engineer - **Company:** Workato - **Location:** Madrid, Spain (Remote available) - **Salary:** €65,000.0 - €80,000.0 - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Applications Architecture, C Sharp (Programming Language), Client Server Models, Performance Tuning, WebGL, Backend, Data Analytics, Code Restructuring, Api Management - **Published:** September 24, 2026 - **Apply:** https://www.adzuna.es/contact-us.html ## About the Role + Demonstrated professional Unity and C# experience, ideally 5+ years, with a track record of shipping complex applications or products. + A portfolio demonstrating experience architecting and refactoring large-scale Unity projects. + Direct experience building for VR, in particular Meta Quest. + A track record of building generic, reusable infrastructure and frameworks, not just one- off features. + Comfort working within a defined client-server architecture and with established API contracts. + A proactive and adaptable mindset suited for the dynamic and evolving environment of an early-stage startup. + Excellent communication and collaboration skills in English, with experience working effectively in a remote, culturally diverse team. + A genuine interest in using technology to enhance learning and education. Nice To Have: + Experience targeting additional client platforms such as WebGL. + Experience with data-driven or reactive component systems. ## Description We are developing a personalized virtual trainer experience, integrating generative AI and learning engineering to build a VR simulator for immersive hands-on skills training. Our learning engineering approach customizes content and feedback in real-time, directly improving learning outcomes. We are looking for a Senior Unity engineer to help build the client-side infrastructure of our training platform. This is not just one-off application work. You will build the client foundation that powers VR training simulations today, and additional client targets over time, connecting it to our server according to a defined client-server architecture. The role demands strong application architecture, on-device services, and performance optimization skills. The Role: This is a hands-on individual contributor role focused on building and evolving key components of our platform's client-side architecture. You will build client infrastructure against a defined server-client architecture in which the server owns authoritative simulation state and logic, connecting the client to the server per spec and reflecting server-owned behavior faithfully on the device., + Own and drive key components of the Unity VR client architecture so they generalize across training simulations and, over time, additional client targets, rather than serving a single application. + Build client-side infrastructure that connects to the server according to defined contracts and reflects server-owned state and behavior on the device. + Co-design the client-server API with the backend, defining the data contracts. + Develop tooling that supports content creators and other developers working on the platform. + Use AI coding assistants as part of day-to-day development, and build and maintain the pipelines and validation that make their output reliable. + Make pragmatic architectural decisions and manage technical priorities effectively in a fast-paced, ambiguous startup environment., + A high-ownership role with direct influence on product direction, architecture, and user experience, and on company culture. + A senior opportunity to build a platform from the ground up and contribute to its growth and commercialization. + The flexibility of a fully remote position, with working hours flexible across European time zones rather than tied to US hours. 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