As a Senior Backend Engineer, you'll design scalable systems, lead complex projects, and collaborate on APIs for AI-driven voice automation.
Senior Backend Engineer | Voice AI Startup
About the Company
Our client is a fast-growing Y Combinator-backed Voice AI startup transforming sales, support, and customer engagement. With $5M in seed funding and approaching $30M ARR already, achieved with just 20 people, they're building the standard for voice automation at scale.
The Role
As a Founding Senior Backend Engineer, you'll build the core systems powering millions of AI-driven conversations. You'll work on real-time audio, global telephony, and developer tooling, collaborating directly with the founding team to define a category-leading product.
Key Responsibilities
- Build foundational architecture including 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, owning delivery and monitoring
- Collaborate with product and design teams to create intuitive APIs for rapid customer onboarding
- Support customer onboarding, troubleshoot issues, and translate feedback into product improvements
Requirements
- 2+ years backend development experience
- CS, CE, or EE degree or equivalent practical experience
- Ownership mindset with passion for impactful software
- Thrives in fast-paced, ambiguous environments with strong problem-solving skills
- Clear communication and cross-functional collaboration abilities
- Bonus: Startup experience and cloud infrastructure/DevOps knowledge
Compensation & Benefits
- Salary: $200K - $280K
- Equity: 0.25% - 0.45%
- Schedule: Full-time, 70 hrs/week (50 onsite + 20 remote, flexible hours)
- Location: Redwood City, CA
- 100% medical, dental, vision coverage
- Unlimited meals and snacks
- Gym and commute reimbursement
- Visa sponsorship available (H1B, TN, L-1, E-3, F-1, O-1)
Interview Process
- Online coding assessment (25-30 min)
- Technical phone interviews (2 rounds focusing on data structures and algorithms)
- Onsite/virtual interviews: practical coding, system design, and automation
Top Skills
Backend Development
Cloud Infrastructure
DevOps
Similar Jobs
Artificial Intelligence • eCommerce • Logistics • Retail
As a Senior Backend Engineer, you will design and maintain scalable backend services, optimize system performance, and collaborate with frontend engineers on API integrations.
Top Skills:
AsyncioAWSPostgresPythonRestful Apis
Fintech • Professional Services • Software
As a Senior Back End Engineer, you will lead engineering best practices, develop scalable systems, and mentor team members while resolving complex problems.
Top Skills:
AWSJavaKubernetesMicroservicesPostgresSpring Boot
Gaming • Information Technology • Mobile • Software • Esports
The role involves executing marketing campaigns for North America, coordinating with teams, managing timelines, and reporting on performance, while not owning strategy or budgets.
Top Skills:
Campaign ManagementConsumer MarketingDigital Marketing
What you need to know about the San Francisco Tech Scene
San Francisco and the surrounding Bay Area attracts more startup funding than any other region in the world. Home to Stanford University and UC Berkeley, leading VC firms and several of the world’s most valuable companies, the Bay Area is the place to go for anyone looking to make it big in the tech industry. That said, San Francisco has a lot to offer beyond technology thanks to a thriving art and music scene, excellent food and a short drive to several of the country’s most beautiful recreational areas.
Key Facts About San Francisco Tech
- Number of Tech Workers: 365,500; 13.9% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Google, Apple, Salesforce, Meta
- Key Industries: Artificial intelligence, cloud computing, fintech, consumer technology, software
- Funding Landscape: $50.5 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Sequoia Capital, Andreessen Horowitz, Bessemer Venture Partners, Greylock Partners, Khosla Ventures, Kleiner Perkins
- Research Centers and Universities: Stanford University; University of California, Berkeley; University of San Francisco; Santa Clara University; Ames Research Center; Center for AI Safety; California Institute for Regenerative Medicine
