Frontend Engineer, 2D Editor (Geometry) in Wien

Synaps is building a new standard for architectural design with AI. The editor is our core product, and we’re looking for an engineer who knows how these systems actually work: geometry, state machines, precision tooling, and fast interaction loops. If you’ve built complex editors before, or always wanted to, this is the right place. What you’ll work on

You’ll own the interaction logic behind our 2D editor, the part that makes drawing feel precise, fast, and predictable. Tools for polylines, walls, windows, openings, and constraints Snapping, intersections, guides, and measurement tools Hit detection, selection, and transform behavior Reliable undo and redo Collaborative editing powered by CRDTs (Loro) Spatial indexing for performance (r-trees and similar) You won’t touch the rendering engine layer. This role is about the brains of the editor: geometry, state, and user interaction. Our stack

React and TypeScript XState (every tool is state-machine driven) Jotai for local state Loro CRDT for multiplayer state Canvas rendering handled separately (you interface with the logic, not the GPU) What you bring

Strong experience building interactive, tool-driven products: Figma-like editors, CAD tools, GIS systems, game editor tooling, or anything with real-time manipulation Comfortable with applied geometry: intersections, projections, angle constraints, and vector math Understanding of linear algebra at the level needed for precise 2D interactions Ability to implement or adapt known algorithms Experience with XState or similar state machine architectures Familiarity with spatial data structures for fast interaction Disciplined about performance, correctness, and UX feel Nice to have

Experience with collaborative or real-time editors A sense for spatial UI and design tools Curiosity about parametric and constraint-based systems How we work

We’re a startup. You get real ownership, move fast, and build core product. The editor is the heart of Synaps, and your work directly shapes how people design spaces. We’re building a small team of sharp, creative builders who want to be early at a generational company. We care deeply about craft, ship world-class products, and expect a high bar. If that resonates with you, this is the place. Perks and benefits

Competitive compensation Flexible, trust-based work setup Relocation and visa support Offsites that aren’t cringe Device of choice Five weeks of paid vacation Hiring process

Screening call, 30 min, remote Technical assignment, 3 to 4 hours, remote or in-person Founders interview, 1 hour, remote or in-person Meet the team, 2 hours, remote or in-person

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