Senior Software Engineer

About the job Senior Software Engineer San Francisco, CA • Hybrid (3 days/week on-site) • Full-time Compensation: $170K-$311K + equity About the Company Our client is a profitable, growth-stage company building an AI-native go-to-market platform used by hundreds of thousands of businesses worldwide. They're rebuilding their entire product around AI and agents, and they're hiring senior engineers to own core systems at real scale. The engineering culture is high-bar, autonomy-driven, and built around AI-assisted development. Growth-stage • ~250 people • Industry: Software Development, AI, B2B, Marketing, Enterprise The Role You'll design, build, and scale large distributed systems, owning significant pieces of the platform end-to-end and building AI-native agent systems that hundreds of thousands of customers rely on every day. What you'll be doing Own significant systems and features end-to-end, from design through production and day-to-day operation Build and operate large-scale distributed systems, choosing and combining the right technologies for the problem Take hard, ambiguous problems and drive them to shipped outcomes, owning reliability, performance, and cost Build AI-native agent systems used at scale Tech stack: React, Ruby/Rails, Python, MongoDB, Elasticsearch, GCP/K8s (with Kafka and Terraform in the mix) Requirements 5-8 years in backend or full-stack engineering, centered on building large-scale distributed systems Hands-on experience at a startup, an AI-native company, or in an early/founding-engineer setting A track record of owning and operating high-scale distributed systems (100K+ users) Clear growth in scope and responsibility over your career, rather than staying flat at the same level Strong system-design ability for large-scale data and distributed systems Currently at (or recently from) a well-regarded, high-growth engineering organization, with a strong database background or experience building LLM-powered systems Comfortable working across Ruby/Rails, Python, and MongoDB or Elasticsearch Based in the SF Bay Area and able to work hybrid, three days a week on-site Nice to Haves A CS degree from a strong program (weighted less heavily if you have 5+ years of strong experience) Day-to-day use of AI-assisted development tools such as Copilot or Cursor Why Join Own systems end-to-end that hundreds of thousands of customers depend on daily Join a high-bar, AI-native engineering team with genuine autonomy and a real tooling budget Work on AI and agent systems at true scale Competitive compensation plus equity Details Location: San Francisco, CA Work policy: Hybrid - 3 days/week in office Compensation: $170K-$311K + equity Visa sponsorship: Open to visa transfers (e.g. OPT, H-1B transfers) Employment type: Full-time David Joseph and Company