Frontend Engineer, 2D Editor (Geometry)

Synaps; Österreich; Remote; EUR 65,000 - 105,000; Full time

Benefits offered by this job

Relocation and visa support

Five weeks paid vacation

Competitive compensation

Flexible, trust-based work setup

Device of choice

Job summary

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.

You’ll own the interaction logic behind our 2D editor, the part that makes drawing feel precise, fast, and predictable. This role focuses on the brains of the editor: geometry, state, and user interaction, with a stack including React/TypeScript,

Qualifications

• 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.

Responsibilities

• Own the interaction logic behind our 2D editor, making drawing precise, fast, and predictable.
• Implement tools for polylines, walls, windows, openings, and constraints.
• Develop snapping, intersections, guides, and measurement tools.
• Ensure reliable undo and redo.
• Support collaborative editing via CRDTs (Loro).
• Work with spatial indexing for performance (rt-trees and similar).

Skills

Interactive tools

Applied geometry

Linear algebra

State machines

XState

Spatial data structures

Performance & UX

Tools

React

TypeScript

Jotai

Loro CRDT

Job description

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