Job Details

Sr Founding Full Stack Software Engineer

Join to apply for the Sr Founding Full Stack Software Engineer role at Syndesus, Inc.

Get AI-powered advice on this job and more exclusive features.

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 Full-Stack Engineer, you'll build the core platform powering millions of AI-driven conversations. Working with React, TypeScript, and Node.js, you'll create scalable systems and intuitive interfaces that enable seamless customer experiences.

Key Responsibilities

• Develop core features including prompt orchestration, dashboards, analytics, and telephony integrations
• Build full-stack systems from polished UIs to robust APIs and DevOps workflows
• Own projects end-to-end from architecture to production deployment
• Support customer onboarding and translate feedback into product improvements

Requirements

• 2+ years full-stack experience with React, TypeScript, Node.js, or Python
• CS/CE degree or equivalent practical experience
• Ownership mindset with ability to solve problems independently
• Thrives in fast-paced, dynamic environments
• Strong communication and collaboration skills
• Equity: 0.25% - 0.45%
• Schedule: Full-time, 70 hrs/week (50 onsite + 20 remote, flexible hours)
• Location: Redwood City, CA
• Unlimited meals and snacks
• Gym and commute reimbursement

Interview Process

• Online coding assessment (25-30 min)
• Technical phone interviews (2 rounds)
• Onsite/virtual interviews: practical coding, system design, and automation

Seniority level

• Mid-Senior level

Employment type

• Full-time

Job function

• Engineering and Information Technology

Industries

• Software Development and Technology
• Information and Media