Founding Engineer Full Stack

We are redefining the future of voice-based interactions by building highly realistic AI-powered voice agents that enhance customer support order intake and lead qualification across industries. Backed by top investors our AI is already handling millions of calls for leading companies across sales support and logistics.

With $2.7 million in funding and a lean elite team of three we were positioned for rapid expansion. If you thrive in high-growth talent-dense environments and want to shape the technical foundation of an AI-first company this is your opportunity.

Role Overview:

As a Founding Engineer youll shape the technical architecture product roadmap and long-term vision. Youll work with cutting-edge LLMs voice systems and scalable infrastructure while interfacing directly with customers and influencing product design.

This role demands an entrepreneurial mindset: we want someone who can move fast solve complex technical challenges and build with ownership.

What Youll Do:

• Design and implement scalable full-stack systems (backend-heavy) that power millions of real-time interactions.

• Collaborate with product and design to turn customer insights into elegant technical solutions.

• Contribute to the development of prompt engineering and AI/LLM integrations for production-ready platforms.

• Take ownership of technical decisions infrastructure and reliability at an early stage.

• Act as a core partner in shaping company culture hiring and long-term strategy.

Who were they Looking For:

Seniority & Experience:

• 20 years as a full-stack engineer ideally spiking on the backend.

• 13 years of experience at high-caliber startups (e.g. Scale AI Figma Notion Databricks).

• Bonus: founder or founding engineer experience.

Education:

• Technical degree from a top 20 CS school (or equivalent exceptional background).

Hard Skills

• Proficiency with TypeScript React Python Ruby on Rails PostgreSQL AWS.

• Experience with applied AI and/or prompt engineering for LLM platforms.

Soft Skills

• Creative problem solver with enthusiasm for tough technical challenges.

• Self-motivated independent and proactive in a startup setting.

Other:

• Passion for AI innovation constantly learning and experimenting.

• Willingness to work 5.5 days per week in-person in San Francisco (Mon-Fri plus half-day Sundays).

Compensation & Benefit:

• Salary: $160K $260K

• Equity: 0.5% 1.5%

• Visa sponsorship May Be Possible for exceptional candidates.

• Work directly with world-class founders early customers and cutting-edge AI systems.

Interview Process:

1. Intro coding interview (45 minutes)

1. Take-home assignment (23 hours)

1. On-site work trial (full day)

You wont just be writing code youll be shaping the foundation of an AI company from day one.

Apply