AI-first Fullstack Software Engineer (in-person 5x a week)

Why this role exists

Soraban is building the AI that takes the manual work out of tax preparation. Our platform runs the entire workflow for accounting firms — client intake (Collect), data entry into their tax software (Connect), AI-native return prep (Prepare), and delivery with e-sign and payments (Deliver).

What you'll actually work on

• Production-harden MVPs across our four products against a roadmap that's already scoped.
• Make document pipelines reliable at scale — classification and extraction across W-2s, the 1099 series, multi-page K-1 packages, 1098s, 1095-As — feeding a human-in-the-loop review flow where accuracy is the product.
• Tame AI non-determinism — the hard, interesting part.
• Evals, regression tests, confidence/provenance on model outputs, and guardrails so a fallback or a truncated context never quietly ships a wrong return.
• Build backend systems that hold up — messy real-world PDFs, integrations with UltraTax, Lacerte, Drake, and CCH Axcess, and throughput that scales with the busy season.
• Earn CPA trust through small UX decisions — reviewers approve our AI's work side-by-side with the source documents.

Who thrives here

• Backend strength is non-negotiable. Data modeling, APIs, reliability, performance.
• Data modeling, APIs, reliability, performance.
• Data modeling, APIs, reliability, performance.
• Data modeling, APIs, reliability, performance.
• Data modeling, APIs, reliability, performance.
• Data modeling, APIs, reliability, performance.
• Data modeling, APIs, reliability, performance.
• Data modeling, APIs, reliability, performance.
• Data modeling, APIs, reliability, performance.
• Data modeling, APIs, reliability, performance.

A note on fit

• We're looking for people who are running toward what we need — not just looking for the next role.
• The engineers who do their best work here chose Soraban deliberately: they want the pace, the ownership, the AI-first way we build, they love the intensity and hard work culture.
• If that's you, we should talk.
• We’re currently receiving 100s of applications so help us identify you, tell us why you standout for this position.

How to apply

Skip the cover letter. Send links to what you've built — products, repos, case studies, demos. Show us, don't tell us.

We're an onsite team in Tempe, AZ and San Francisco, CA, and we're excited about our new office. This role is in person.

You must be legally authorized to work in the US. We're not able to offer visa sponsorship at this time.

Principals only — no recruiters, please.