Senior Software Engineer

We are looking for a Senior Software Engineer with 5+ years of experience to join a small, high-performing AI startup building the data backbone and automation platform for construction owners. You'll be a deeply technical IC who thrives in early-stage environments, shipping production backend services, making architectural decisions, and mentoring junior engineers, with a clear path to grow into the Lead Engineer role within 3-6 months. We need someone who has been a founding engineer or early hire at a B2B SaaS startup, is comfortable wearing multiple hats, and brings a product mindset alongside deep Python and AWS expertise.

What will you be doing?

- Designing, building, and operating production-grade backend services and data pipelines using Python and AWS (Lambda, Step Functions, serverless architectures)

- Making critical architectural and system design decisions while leveraging AI coding tools (like Claude) to accelerate development

- Owning features end-to-end from backend to front end (React), eliminating handoffs and shipping faster as a full-stack contributor in a 90% backend / 10% frontend codebase

- Engaging directly with customers and forward-deployed engineers to understand workflows, clarify requirements, and translate ambiguous needs into shipped software

- Mentoring junior engineers through code reviews, design discussions, and pairing