Full-Stack Software Engineer

Alex AI; San Francisco (CA); On-site; USD 100,000 - 250,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

401(k) plan

Fully paid parental leave

Commuter benefits

In office lunch

Dog-friendly office

Job summary

Alex AI is hiring a hands-on engineer in San Francisco to build both consumer‑facing and enterprise‑grade software, collaborating closely with a tight‑knit team. You will tackle latency improvements, model refinement to reduce hallucinations, and scalable system architecture for thousands of concurrent users.

You’ll work in person in San Francisco 5 days a week, with a competitive salary and equity, plus comprehensive benefits including medical, dental, vision, and commuter perks.

Qualifications

• Hands-on engineer building consumer-facing and enterprise-grade software.
• Experience with cloud/DevOps and system architecture is preferred.

Responsibilities

• Build consumer-facing and enterprise-grade software with opportunity for growth.
• Work on models and architecture to scale for thousands of users.
• Integrate with customers' internal hiring systems and present results visually.
• Improve interview latency and reduce model hallucinations.

Skills

Problem solving

Fast learner

Work hard

Urgency

In-person collaboration (SF)

Tools

Javascript

Typescript

React

Node

Next

Python

Azure

Kubernetes

Docker

System Architecture

Job description

About Alex

Alex was just named to the CB Insights AI 100 of 2026, the 100 most promising AI startups in the world. We're building the future of hiring: our AI recruiter conducts live job interviews, coordinates follow ups, and more giving companies deeper hiring signal faster than ever. We work with some of the most respected brands in the world and have raised $20M to date.

About Alex

Alex was just named to the CB Insights AI 100 of 2026, the 100 most promising AI startups in the world. We're building the future of hiring: our AI recruiter conducts live job interviews, coordinates follow ups, and more giving companies deeper hiring signal faster than ever. We work with some of the most respected brands in the world and have raised $20M to date.

Who are we?

We’re people who:

• genuinely enjoy solving complex engineering problems
• learn quickly and do what it takes to deliver results
• work really, really hard
• move with urgency
• enjoy and value working together in person in San Francisco 5 days a week

What technologies do we use?

Experience preferred in:

• Javascript (Typescript, React, Node, Next)
• Python
• Cloud / DevOps (Azure, Kubernetes, Docker)
• System Architecture

What can I work on?

Alex is similar to a marketplace, as we serve both candidates through the interview experience and employers through a data aggregation and analysis platform. As a hands‑on engineer, you will build both consumer‑facing and enterprise‑grade software with a clear opportunity for growth. Problems that you could work on related to consumer software are:

• How can we bring the average interviewer response latency down to 200ms?
• How can we fine‑tune our models to decrease hallucination and help Alex pass the Turing test?
• How will our system architecture change as we scale to thousands more users, concurrently?

Problems that you could work on related to enterprise software are:

• How do we integrate with our customer’s internal hiring systems?
• What’s the best way to present interview results visually and as fast as possible?
• How can Alex expand to coordinating the hiring process end to end?
• And many, many feature requests that need to be built out!

What’s in it for me?

• Take ownership of building the next billion dollar company
• Collaborate with a tight‑knit team of talented builders
• Launch products that directly impact people’s careers
• Work with the founding team daily in‑person in San Francisco
• Competitive salary and equity
• Medical, dental, and vision insurance
• FSA, DCFSA, HSA options
• Flexible paid time off (PTO)
• 401(k) plan
• Fully paid parental leave program
• Commuter benefits
• In office lunch
• Dog‑friendly office

Alex is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected characteristic.

Compensation Range: $100K - $250K