Founding Full Stack Engineer

Location: San Francisco (Hybrid) Type: Full-time Compensation: $170k-$200k base + 0.2%-0.6% equity (flexible for exceptional candidates) Visa sponsorship: Available Reports to: Ankur Dahiya, Co-Founder & CEO About Us

At Fifteenth , we're reimagining the future of personal taxes - starting with the people who are building the future: founders, investors, and employees at high-growth startups. Taxes today are painful, opaque, and error-prone. We're building an intelligent, seamless platform that handles everything from planning to filing, so our users never have to stress about taxes again.

Backed by $8.3M in funding and based in San Francisco , we're a team of 10 builders on a mission to disrupt the $40B+ personal tax industry . Now we're hiring a Founding Full Stack Engineer to help us move fast and scale up. Who You Are Customer-Obsessed: You build with users in mind - the experience is as important as the functionality. Pragmatic: You focus on what really matters and prioritize for maximum impact. Curious Generalist: You're fast to pick up new technologies and don't shy away from unfamiliar challenges. Technically Strong: You're fluent in modern web technologies and frameworks. Experienced: You have 5-8 years of hands-on engineering experience , ideally in fast-moving environments. •Minimum Requirements 5-8 years experience as a fullstack software engineer, building and iterating on real products Proven track record leading 01 product development at startups or high-growth companies Senior or staff-level engineer at a top-tier company (e.g. Stripe, Rippling, Brex, Harvey) - FAANG experience is welcome if paired with early-stage product-building experience Deep expertise in your preferred languages and frameworks (we care more about skill than stack) Experience working with cloud platforms (GCP, AWS, Azure) Fullstack capabilities with a frontend-leaning edge - comfortable designing clean UIs and component libraries Strong product sense - you refine things until they're right, not just until they work Bonus Points Interest in the personal finance or tax space Familiarity with secure data handling, document parsing, or integrations with IRS/tax software Desire to grow into a leadership role as the company scales Why Join Fifteenth? Help define the technical foundation of a category-defining fintech product Ship fast in a low-ego, high-ownership culture Build something that removes pain and confusion from millions of people's lives Work closely with an exceptional founding team in hybrid onsite setup in SF Join at a stage where your impact is deeply felt - across product, culture, and company direction

If you're an experienced, product-focused builder excited about reshaping personal taxes, we'd love to meet you. Apply now or reach out directly.

Let's fix taxes. Together.