Demo

Full Stack Software Engineer

Weekday AI (YC W21)
San Francisco, CA Full Time
POSTED ON 8/20/2025 CLOSED ON 8/28/2025

What are the responsibilities and job description for the Full Stack Software Engineer position at Weekday AI (YC W21)?

This role is for one of the Weekday's clients

Job Type:
Full-time

Experience: Any (new grads ok)

Salary: $150K - $250K

Requirements

Who are we?

We're a team of builders who:

  • Love solving complex engineering challenges
  • Learn quickly and adapt to deliver impactful results
  • Work with intensity, urgency, and focus
  • Take pride in shipping with speed and quality

What technologies will you work with?

You should bring strong experience in:

  • JavaScript (TypeScript, React, Node.js, Next.js)
  • Python (FastAPI, concurrency)
  • Cloud / DevOps (Azure, Kubernetes, Docker)
  • System Architecture

We'd also value experience with:

  • Strong frontend/UI design skills (Figma)
  • Machine Learning/Deep Learning (open-source tools, inference at scale)

What will you work on?

We operate at the intersection of consumer and enterprise software, building platforms that serve candidates through interview experiences as well as employers through data aggregation and analytics. As a hands-on engineer, you'll have the opportunity to build both consumer-facing and enterprise-grade products with direct, large-scale impact.

Potential challenges you'll work on include:

Consumer Software:

  • Optimizing systems to reduce average response latency to :200ms
  • Fine-tuning ML models to minimize hallucination and maximize accuracy
  • Scaling architecture to support thousands of concurrent users

Enterprise Software:

  • Seamlessly integrating with client hiring systems
  • Designing and delivering fast, intuitive data visualization solutions
  • Building and shipping new features to meet evolving customer needs

What's in it for you?

  • Own the opportunity to help build the next billion-dollar company
  • Collaborate closely with a high-performing, tight-knit team
  • Launch products that shape and improve people's careers
  • Work directly with the founding team in San Francisco
  • Competitive salary and equity package
  • Comprehensive benefits: health insurance, unlimited PTO, and memorable team events

Salary : $150,000 - $250,000

If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Full Stack Software Engineer?

Sign up to receive alerts about other jobs on the Full Stack Software Engineer career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$123,167 - $152,295
Income Estimation: 
$146,673 - $180,130
Income Estimation: 
$88,984 - $115,784
Income Estimation: 
$111,369 - $141,168
Income Estimation: 
$117,871 - $153,580
Income Estimation: 
$109,939 - $144,341
Income Estimation: 
$114,500 - $144,633
Income Estimation: 
$97,257 - $120,701
Income Estimation: 
$123,167 - $152,295
Income Estimation: 
$123,167 - $152,295
Income Estimation: 
$146,673 - $180,130
Income Estimation: 
$111,369 - $141,168
Income Estimation: 
$131,745 - $167,716
Income Estimation: 
$144,503 - $184,592
Income Estimation: 
$102,541 - $137,871
Income Estimation: 
$153,752 - $200,235
This job has expired.
Employees: Get a Salary Increase
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Job openings at Weekday AI (YC W21)

  • Weekday AI (YC W21) San Francisco, CA
  • This role is for one of the Weekday's clients Salary range: $180k - $250k Experience: 6 YoE We are seeking an experienced Full Stack Engineer with a strong... more
  • 9 Days Ago

  • Weekday AI (YC W21) Mountain View, CA
  • This role is for one of the Weekday's clients Company name: Enrich Labs JobType: full-time About Enrich Labs At Enrich Labs , we envision AI-human hybrid t... more
  • 14 Days Ago

  • Weekday AI (YC W21) York, NE
  • This role is for one of the Weekday's clients Location: York, Nebraska Area (Onsite) Compensation: $100,000-$120,000 Base Overtime Eligibility Performance ... more
  • 15 Days Ago

  • Weekday AI (YC W21) York, NE
  • This role is for one of the Weekday's clients Location: York, Nebraska Area (Onsite) Compensation: $135,000-$150,000 Base Performance Bonus (Historically 1... more
  • 15 Days Ago


Not the job you're looking for? Here are some other Full Stack Software Engineer jobs in the San Francisco, CA area that may be a better fit.

  • Software Guidance & Assistance, Inc. (SGA, Inc.) San Francisco, CA
  • Software Guidance & Assistance, Inc., (SGA), is searching for a Backend Full-Stack Engineer for a CONTRACT assignment with one of our premier Regulatory cl... more
  • 4 Days Ago

  • loop San Francisco, CA
  • About Loop Loop is the data platform for the global supply chain. Logistics runs on messy, unstructured data—trapped in PDFs, emails, and legacy systems. W... more
  • 9 Days Ago

AI Assistant is available now!

Feel free to start your new journey!