Founding Software Engineer (Spatial Systems)

About SubHub

SubHub is building software that turns construction plans into trustworthy, estimator-ready quantities. We focus on solving real geometry and spatial reasoning problems that sit at the core of construction workflows—bridging the gap between blueprints and accurate, usable takeoffs. We’re a small, sharp founding team working closely with construction experts to build systems that are mathematically sound, practical in the field, and trusted by professionals.

The Role

SubHub is looking for a Founding Software Engineer focused on Spatial Systems to own and build the core geometry and quantity logic of our platform. This is a high-ownership role for someone who enjoys deep technical problems, wants direct access to decision-makers, and is excited to define foundational systems from the ground up.

You’ll work on translating complex construction drawings into reliable quantities, building engine-like spatial systems that handle real-world edge cases, numerical stability, and messy geometry. As the company grows, there is an opportunity to help shape and eventually lead a broader engineering team.

What You’ll Do

• Solve complex geometry and quantity problems in construction, such as wall surface areas, paint volumes, and excavation quantities from grading plans
• Build mathematically sound spatial systems that produce estimator-ready outputs
• Design and implement robust geometry algorithms with real-world tolerance handling
• Build upon and help define SubHub’s Python 3 and AWS-based tech stack from scratch
• Collaborate closely with a Senior Construction Estimator to ensure solutions align with real construction practices
• Operate as a hands‑on individual contributor with significant ownership over core systems
• Help shape the technical direction of the product and engineering organization as the company scales

What We’re Looking For

• 5+ years of experience building or working deeply on spatial systems, game engines, physics engines, or VR/AR tooling
• Strong background in spatial reasoning, geometry, or engine‑like systems
• Experience at companies such as Unity, Riot Games, Ubisoft, Roblox, Epic Games, Nintendo, Sony, Microsoft Gaming, EA, or Blizzard Entertainment
• Proficiency in Python or C++
• Hands‑on experience with polygon operations including union, intersection, offsetting, winding rules, and tolerance handling
• Experience implementing collision and overlap checks, ray casting, point‑in‑polygon tests, and triangulation
• Strong understanding of coordinate transforms, unit systems, numerical stability, and degenerate geometry cases
• Some exposure to computer vision or OCR is a plus
• A deep thinker who enjoys tackling hard spatial problems end‑to‑end and turning theory into reliable systems

This role is ideal for someone who wants to apply engine‑level spatial thinking to real‑world construction problems and build foundational systems that matter from day one.