About Retell

Retell is building the new standard for automating call center communications, including sales, support, customer engagement, and retention calls.

Backed by Altman Capital, Y Combinator, and top investors, we've raised a $4.7M seed round and hit to $7M ARR in 12 months.

Check us out on the Top Lean AI Native Companies Leaderboard at leanaileaderboard.com.

Vision

Twenty years ago, every business found itself needing a website, the new gateway to the world. Platforms like WordPress and Squarespace rose to become the standard for getting businesses online.

Today, a new revolution is here. Every business that relies on phone interactions can now have an AI voice agent of their dreams. A tireless and empathetic receptionist, salesperson, debt collector, or appointment reminder that works 24/7. Operational bottlenecks vanish overnight. Doubling your business no longer means doubling your team. Customer experience no longer suffers. (Ever tried calling an East Coast bank after 3 p.m. PT?) But companies aren't ready. Platforms don't exist.

At Retell, we're pioneering the new standard for building AI voice agents. With seamless UI, comprehensive toolkit, effortless integrations, thriving builder community, we're creating everything businesses need to deliver exceptional phone interactions on every single call.

Join us—because the future of AI voice agents is coming anyway, so why not be the one who defines it?

Position: Founding Senior Machine Learning Engineer

Job type: Full-time, 50 hr/week onsite with flexible hours + 20 hr/week work from home

Salary: $200K - $310K

Equity: 0.5% - 1.0%

Bonus: $20k - $100k

Location: Redwood City, CA, US

US visas: Sponsors Visa & Greencard

Benefits: 100% medical, dental, vision insurance coverage. Unlimited breakfast, lunch, dinner, and snacks. Gym, daily commute fee reimbursement. Internet, phone bill covered.

**More about this role description **here

Retell AI

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Founding Senior Machine Learning Engineer