Job Description

5 days ago Be among the first 25 applicants

This range is provided by Underdog.io. Your actual pay will be based on your skills and experience talk with your recruiter to learn more.

Base pay range

$165,000.00/yr - $230,000.00/yr

Senior Full-Stack Engineer AI-Powered Voice Technology

Founded in 2014, Underdog.io is the 2nd largest US-based hiring marketplace for tech and product talent. With over 650 hiring partners in pre-seed, seed, and series A-C looking to hire full-time skilled engineers, data, and product professionals. One of our hiring partners founded in 2024 recently received 5M in seed funding and is looking to add a Founding Engineer.

About the Role

Were building the future of AI-driven voice technology, and we need a Senior Full-Stack Engineer to architect and ship high-impact features that directly shape our product and revenue. Youll work at the intersection of cutting-edge AI, scalable infrastructure, and customer-facing applicationsowning projects from 01 prototyping to 1n scaling.

This is a high-leverage role where youll collaborate with top AI researchers, optimize large-scale audio data pipelines, and deploy real-time ML models that redefine how users interact with voice technology. If you thrive in fast-moving, early-stage environments and want to build foundational AI infrastructure, wed love to hear from you.

What Youll Do

• Build end-to-end, full-stack features that directly impact customers and revenue.
• Solve high-stakes audio AI challenges, from scalable data pipelines to real-time ML model deployment.
• Drive technical decisions at the frontier of AI, working alongside world-class researchers.
• Own and architect solutions from 01 prototyping to 1n scaling, shaping our core product and infrastructure.

Technical Challenges Youll Tackle

• Architect and ship customer-facing full-stack features that enable rapid iteration.
• Design scalable engineering solutions for processing and analyzing terabytes of audio data.
• Optimize data pipelines for large-scale audio dataset generation and quality control.
• Develop and deploy audio-focused ML/LLM models, from research to production.

Who You Are

• 3+ years as a senior full-stack engineer with startup experience (1-2 years at an early-stage or high-growth startup).
• Proven track record of shipping end-to-end features that drive revenue and user impact.
• Leadership presenceable to mentor junior engineers and drive technical discussions.
• Exceptional at breaking down complex problems and communicating system designs.

Technical skills:

• Frontend: Next.js, TypeScript, TailwindCSS
• Experience (or strong interest) in audio AI, signal processing, or ML deployment

Ideal Background

• CS degree from a top 25 university (or equivalent experience).
• Startup-mindedyou thrive in ambiguity and move fast.
• Passion for voice technology, AI, and building from the ground up.
• Startup-minded builders.

Why Join?

• Work on bleeding-edge AI with a world-class team.
• Build foundational infrastructure for a category-defining product.
• Competitive compensation, equity, and the chance to shape the future of voice tech.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Information Technology

• Industries

  Software Development

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