Full Stack Engineer (San Francisco) Job at Underdog.io, San Francisco, CA

NUZSNEtGR1crcFBWcEVEWmdpYVVuc3RtL2c9PQ==
  • Underdog.io
  • San Francisco, CA

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

Referrals increase your chances of interviewing at Underdog.io by 2x

Get notified about new Full Stack Engineer jobs in San Francisco Bay Area .

San Francisco, CA $160,000.00-$180,000.00 3 days ago

San Francisco, CA $40,000.00-$70,000.00 2 weeks ago

San Francisco, CA $130,000.00-$238,000.00 2 weeks ago

San Francisco, CA $220,000.00-$350,000.00 2 weeks ago

San Francisco, CA $145,000.00-$230,000.00 7 hours ago

Software Engineer, AI Intern (Fall 2025)

San Francisco Bay Area $57.00-$61.00 2 weeks ago

Software Engineer, AI Platform - New Grad

Full Stack Software Engineer - Post-training

Mountain View, CA $125,400.00-$188,100.00 2 weeks ago

Software Engineer, Frontend (All Levels)

San Francisco, CA $150,000.00-$220,000.00 2 weeks ago

San Jose, CA $130,000.00-$180,000.00 2 weeks ago

Software Engineer (L4), Content & Business Products

San Francisco, CA $130,000.00-$220,000.00 3 days ago

San Francisco, CA $130,000.00-$185,000.00 1 month ago

San Francisco, CA $165,000.00-$165,000.00 2 years ago

Full Stack Software Engineer (L4), Product Localization Engineering

San Francisco, CA $40.00-$40.00 3 days ago

San Francisco, CA $40.00-$40.00 3 days ago

Palo Alto, CA $152,400.00-$228,700.00 2 weeks ago

San Francisco, CA $130,000.00-$140,000.00 2 weeks ago

San Francisco, CA $125,000.00-$175,000.00 3 weeks ago

San Francisco, CA $120,000.00-$190,000.00 8 months ago

New Grads 2025 - Software Engineer, Algorithm

San Jose, CA $120,000.00-$165,000.00 9 months ago

Were unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.

#J-18808-Ljbffr

Job Tags

Full time,

Similar Jobs

Total Quality Logistics (TQL)

Sales Representative Entry Level - Cincinnati HQ Job at Total Quality Logistics (TQL)

 ...negotiation skills to secure deals for freight transportation while managing customer shipments from pickup to delivery. No prior experience is necessary; our best in-class paid freight broker training and mentorship program will teach you everything you need to know about... 

Kate Somerville Skincare

PR and Influencer Marketing Intern Job at Kate Somerville Skincare

 ...Somerville team is in search of a creative, enthusiastic, and diligent marketing intern. You will work directly with the PR and Influencer...  ...new launches and support with day-to-day functions. This is a part-time, paid internship.What Youll Do:~Assist PR/Influencer... 

Performance Foodservice

Delivery Truck Drive Job at Performance Foodservice

 ...Average annual pay is $104,600. Experienced Delivery Drivers can earn up to an additional $10,000 hiring BONUS...  ...responsible for driving a tractor trailer or straight truck on intrastate and interstate local, over-the-road (OTR), shuttle, and overnight and drive... 

INSP LLC

Administrative Assistant III to SVP - WorldWide Distribution Job at INSP LLC

 ...Job Description Job Description Description: SUMMARY/POSITION OVERVIEW INSP, a top 10 Nielsen-rated TV Channel, and Imagicomm Entertainment, a premier studio production company is in a search of a dynamic and positive team player, who is passionate about TV... 

Ryder

CDL-A Truck Driver - Earn $1,600/Week - 9 Months Experience Required Job at Ryder

 ...Job Description Ryder is Now Hiring Regional CDL-A Drivers in Marion, VA!\nImmediate Opening for a Regional CDL-A Driver!\nEarn $1,600 per Week - $3,000 Sign-On Bonus \n\n Top Pay & Incentives: \n\n \n\t ~ Earn $1,600 per week \n\t ~ Solo Miles Pay: $0....