Senior Software Engineer

About the Role This is a high-ownership engineering role at a seed-stage ECAD SaaS startup building collaborative, AI-assisted design tooling for hardware engineers in complex industries such as aerospace and defense. As a senior engineer on a small, fast-moving team, you will own core systems across the stack — from cloud infrastructure and AI copilot features to real-time collaboration and physics-based simulation. You will help set the technical direction of the product as it scales. What You'll Do Architect application infrastructure spanning the cloud ecosystem, AI copilot, and physics simulation backend. Lead development of major features end to end — from architecture and implementation through deployment and sustainment. Collaborate closely with the product team to identify and deliver the capabilities customers need most. Define and uphold technical standards and long-term system architecture as the product and team grow. What We're Looking For Required 5+ years of software engineering experience with demonstrated ownership of production systems or large-scale features. Deep expertise in at least one layer of the stack — frontend frameworks, real-time collaboration, or AI/ML systems. Proficiency with modern tools including React , TypeScript , and Python . Strong product intuition and a track record of effective cross-functional collaboration in fast-paced environments. Experience with physics-based modeling and simulation systems. Ability to work in the United States without visa sponsorship. Nice to Have Background in hardware engineering tooling, CAD/ECAD platforms, or aerospace and defense software. Experience building security-compliant SaaS products (e.g., GovCloud, ITAR, CUI environments). Familiarity with real-time collaborative editing architectures (e.g., CRDTs, OT). Compensation & Benefits Salary: $120,000 – $170,000 USD annually, depending on experience. Equity participation in a seed-stage company with significant growth potential. Small team environment with high autonomy and direct impact on product direction. Location This role is on-site in New York, NY . Remote and hybrid arrangements are not available. Candidates must be authorized to work in the United States; visa sponsorship is not offered.