Software Engineer, Tax

Aiwyn is the first complete platform for modern Accounting Firms. Backed by top-tier investors like Bessemer, KKR, and Revolution, we're one of the fastest-growing scale-up SaaS companies in the world. We build category-defining technology, and we're doing it with world-class people, processes, and products.

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We work with the majority of the Top 500 firms in the country. We're replacing 40-year-old tax engines and brittle integrations with software accounting firms can actually trust, and we have rare product-market fit in an industry that's about to change permanently. We're hiring a senior software engineer to join the team that owns our tax engine: the calculation core that's already filed over a million returns and is now the wedge that lets us own the entire return end to end.

The tax engine is one of the most strategic pieces of IP at Aiwyn, and the foundation we're opening up to AI labs and modern firms who want a tax engine they can build on top of. We built TaxCalcBench, which has become how the AI labs measure their frontier models on tax calculation, and Anthropic came to us to ship Aiwyn Tax as a Claude Connector. The next milestone is full 1040 coverage for every American filer, then onward into other forms — at AI-pace, with accuracy held at 100%.

You'll be a senior engineer on the team behind this work, partnering closely with a deeply tenured group of CPAs and tax experts who set the bar for what "correct" means.

Aiwyn is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, color, family or medical care leave, gender identity or expression, genetic information, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran status, race, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws, regulations and ordinances.

Candidate information will be treated in accordance with our CCPA privacy notice which can be found here: https://www.aiwyn.ai/ccpa