Full Stack Software Engineer

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 problemslearn quickly and do what it takes to deliver resultswork really, really hardmove with urgencyenjoy 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 companyCollaborate with a tight-knit team of talented buildersLaunch products that directly impact people’s careersWork with the founding team daily in-person in San FranciscoCompetitive salary and equityMedical, dental, and vision insuranceFSA, DCFSA, HSA optionsFlexible paid time off (PTO)401(k) planFully paid parental leave programCommuter benefitsIn office lunchDog-friendly office If you’ve gotten this far and our culture/tech resonates with you, we want you to apply. Your first conversation will be with Alex, our AI recruiter. 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