Senior Software Engineer, Backend

1 week ago

Fremont CA, Alameda County, CA; California, United States Stealth Startup Full-time
Our AI voice agents are reshaping sales, support, and customer engagement for leading brands. We're one of the fastest-growing Voice AI startups and we're on a mission to become the standard for voice automation at scale. As a Founding Senior Backend Engineer, you'll shape the core systems powering millions of AI-driven conversations. You'll tackle real-time audio, global telephony, and developer tooling, working across the stack with the founding team. This high-impact role offers rapid feedback loops, customer collaboration, and the chance to define a category-leading product. Build foundational architecture for the company's platform, such as prompt orchestration, testing frameworks, observability dashboards, and telephony integrations. Design scalable backend systems and DevOps workflows for reliable performance across millions of calls. Lead complex projects from architecture to production, driving delivery and monitoring. Collaborate with product and design teams to create intuitive APIs and interfaces for quick customer onboarding. Support customer onboarding, troubleshoot issues, and turn feedback into product improvements. Have 2+ years of backend development experience with a degree in CS, CE, or EE. Take ownership like a founder, with a passion for impactful software. Have startup experience or grit to adapt, with bonus points for cloud infra/DevOps knowledge.

Job Type
Full-time, 70 hr/week (50 hr/week onsite with flexible hours + 20 hr/week work from home) Cash: 215k
- 290k Equity: 0.4
- 0.6% US Visas: Sponsors Visa & Green Card 100% medical, dental, vision insurance coverage ~ Gym and daily commute fee reimbursement ~ Internet and phone bills covered Choose from three cash-equity balance options, no negotiation needed. ~ 1M revenue/employee, and significant equity. ~ Performance-Based: Offers tied to interview performance, not experience or past salaries.