Senior Software Engineer

About the Role

We're a Y Combinator-backed, seed-stage AI startup modernizing procurement and distribution for the defense, aerospace, and industrial sectors. Our small, high-caliber team of ~15 embeds directly into client operations to build AI-native systems that bring order to fragmented, legacy-heavy environments - automating quoting, sourcing, and operational workflows at scale.

We're looking for a Senior Software Engineer to join our core platform team. This is a backend-leaning full-stack role where you'll design and ship end-to-end features across frontend UI, backend services and APIs, AI workflows, and database schemas - all in service of high-value supply chain operations.
What You'll Do

• Collaborate with the platform team and forward-deployed customer-facing engineers to design, build, and maintain robust full-stack systems.
• Integrate with complex legacy environments (ERP, CRM, supplier portals, spreadsheets, shared drives, and more).
• Build and maintain backend services and RESTful or GraphQL APIs.
• Develop frontend UIs using Svelte and TypeScript .
• Design and optimize PostgreSQL schemas and write efficient SQL for data-intensive workflows.
• Contribute to AI workflows and validation systems that power real-time operational intelligence.
• Manage and deliver multiple projects in parallel within a collaborative, co-located team environment.
• Work closely with teammates across SF and Warsaw offices.

What We're Looking For

Required:

• Up to 5 years of software development experience (we value depth and demonstrated impact over years alone).
• Proficiency with Svelte and TypeScript for frontend development.
• Strong experience with PostgreSQL , including schema design and efficient query writing.
• Experience designing and implementing backend services and RESTful or GraphQL APIs.
• Proven ability to integrate with legacy systems and complex technical environments.
• Experience contributing to AI workflows and/or validation systems.
• Comfort shipping full-stack features end-to-end in a fast-paced, ambiguous startup environment.
• A collaborative mindset - this team moves fast and works closely together, both in-person and across time zones.

Nice to Have:

• Experience working in or with distributed, multi-location engineering teams.
• Domain knowledge in supply chain, logistics, procurement, defense, or aerospace.

Compensation & Benefits

• Salary: $150,000 - $220,000 USD annually, depending on experience.
• Equity participation in a well-funded, early-stage company.
• Opportunity to work on genuinely hard technical problems with a high-caliber, mission-driven team.

Note: Visa sponsorship is not available for this role.
Location

This is an on-site role based in San Francisco, CA . Candidates must be willing and able to work from our SF office. Relocation to San Francisco is expected.