Senior Backend Engineer

About the role

We're looking for a generalist, high-agency engineer with 5+ years of backend experience building customer-facing products.

You should have startup DNA, a product mindset, and the ability to drive projects end-to-end - from concept to production.

Tasks

• Own and ship product features end-to-end
• Design and build LLM agents that work with real-world data (RAG, agent frameworks)
• Make key technical decisions across the product and backend
• Operate with full autonomy and high ownership
• Tackle high-risk, high-impact projects with minimal hand-holding
• Shape product direction with the founding team
• Support growing client engagements (hundreds to thousands of employees)

Requirements

• 5+ years of backend engineering experience building and shipping customer-facing products.
• Strong production-level Python, SQL, API design, and backend architecture skills.
• Hands-on experience with LLMs, RAG, or AI agentic systems.
• Experience working in early-stage startups (Series B or earlier) or as a founder.
• Strong product mindset, ownership, and ability to drive projects independently from concept to production.
• Preference for candidates with existing US or Canadian work authorization.
• Visa sponsorship is not generally available.
• Experience at top-tier startups (Series B or earlier) or as a founder
• Built and shipped customer-facing backend products at scale
• Deep Python expertise for production systems
• Strong backend architecture and systems design skills
• Set technical direction on ambiguous, high-impact projects
• Generalist - comfortable building across the product surface
• Proficient in API design and SQL data stores
• Hands-on experience with LLMs or agentic AI systems
• Product mindset - ties tech work to business impact
• Direct experience working with customers (preferred)
• Fluent with AI coding tools (uses AI as a force multiplier) (preferred)

Schedule

• Full-Time

Pay

• $190K – $300K

Benefits

• Founding-Level Equity

How to apply

• Send your CV by email.
• Use the subject line: Senior Backend Engineer.

Location

• San Francisco, CA / Toronto, Canada
• Remote-friendly with periodic onsite collaboration
• with offices in SF & Toronto