Senior/Staff Software Engineer, Product
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At a glance
Job overview
Slash is hiring a Senior/Staff Software Engineer, Product. Slash is building the future of business banking, creating a new category of financial infrastructure tailored to how businesses operate. The Senior/Staff Software Engineer will own end‑to‑end product surfaces, design data models, build fault‑tolerant financial primitives, and shape engineering standards while collaborating with product, design, and compliance.
Key focus areas include Own and ship entire product surfaces end‑to‑end, from database schema and API design to daily customer‑facing features, Build and scale core financial infrastructure including payments, transfers, invoicing, bill‑pay, onboarding, and card management systems, and Design data models, write migrations, and develop backend services that power complex multi‑step financial operations.
Successful candidates bring Shipped And Owned Full Product Surfaces. Important skills include Database Schema Design, API Design, Full-Stack Engineering, Data Modeling, Backend Services, and Product Instincts. Preferred (not required): Financial Systems, Payments, Ledgers, and Compliance.
Skills & qualifications
Skills
Qualifications
Benefits
Full job description
About Slash Slash is building the future of business banking, one industry at a time. We believe businesses deserve financial infrastructure tailored to how they actually operate. That's why we're creating a new category of business banking. We combine the reliability of traditional banking (high yields, competitive rewards, and comprehensive security) with industry-specific features that make businesses more efficient, more competitive, and more profitable.
Started in 2021, Slash is one of the fastest growing fintechs in the world and we power over ten billion dollars a year in business purchasing across numerous industries. We recently raised a $100M Series C led by Ribbit Capital with participation from Khosla Ventures, Goodwater Capital, NEA, and Y Combinator, accelerating our expansion into new markets and products.
Slash is headquartered in San Francisco, and has a strong in-person culture.
About the role Slash is, at its core, a technology company and is on a mission to build the best engineering team in the world. We’re looking for a Senior/Staff Software Engineer to help build and evolve our core banking product that powers $10b in transaction volume a year. This role blends infrastructure-level thinking with deep product intuition. You’ll build fault-tolerant, user-facing financial primitives that spans across all customers, and you’ll do it fast, cleanly, and with ownership.
What you’ll do
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Own and ship entire product surfaces end-to-end, from database schema and API design to building the product customers interact with daily
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Build and scale our core financial infrastructure: payments, transfers, invoicing, bill pay, onboarding, and card management systems that move tens of billions of dollars a year
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Design data models, write migrations, and build the backend services that power complex multi-step financial operations
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Work directly with product, design, and compliance to ship features that are correct, compliant, and actually good to use — in financial software, the details are the product
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Shape engineering standards, contribute to architecture decisions, and talk to customers to figure out what to build next
We're Looking for Someone Who
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Has shipped and owned full product surfaces — not just isolated features, but entire systems from data model to deploy
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Is a strong full-stack engineer: comfortable designing API endpoints, writing a database migration, and building the frontend for a project end to end
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Has strong product instincts — thinks holistically about UX, API ergonomics, and system correctness, and pushes back when something doesn't feel right
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Thrives working independently in a small team that ships fast — you're the kind of person who builds product without requiring a full spec
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Cares about craft: writes clean, well-tested code, thinks about edge cases, and takes pride in building software that is delightful to use
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Bonus: Has an intuition for financial systems (payments, ledgers, compliance) or a genuine desire to go deep on them
What's in it for You:
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Opportunity for high growth
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High autonomy + ownership culture
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Comprehensive health + benefits plan
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Working out of our downtown San Francisco office space
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Unlimited PTO
You've read the whole posting — now see how you match it.