Senior/Staff Software Engineer, Product

Slash Financial•San Francisco, CA

1d•Onsite

About The Position

Slash is building the future of business banking, creating a new category of business banking that combines the reliability of traditional banking with industry-specific features. Started in 2021, Slash is one of the fastest growing fintechs, powering over ten billion dollars a year in business purchasing. The company recently raised a $100M Series C and is headquartered in San Francisco with a strong in-person culture. As a technology company, Slash is seeking a Senior/Staff Software Engineer to help build and evolve its core banking product, which handles $10b in transaction volume annually. This role requires a blend of infrastructure-level thinking and deep product intuition, focusing on building fault-tolerant, user-facing financial primitives quickly, cleanly, and with ownership.

Requirements

Has shipped and owned full product surfaces — not just isolated features, but entire systems from data model to deploy
Is a strong full-stack engineer: comfortable designing API endpoints, writing a database migration, and building the frontend for a project end to end
Has strong product instincts — thinks holistically about UX, API ergonomics, and system correctness, and pushes back when something doesn't feel right
Thrives working independently in a small team that ships fast — you're the kind of person who builds product without requiring a full spec
Cares about craft: writes clean, well-tested code, thinks about edge cases, and takes pride in building software that is delightful to use

Nice To Haves

Has an intuition for financial systems (payments, ledgers, compliance) or a genuine desire to go deep on them

Responsibilities

Own and ship entire product surfaces end-to-end, from database schema and API design to building the product customers interact with daily
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
Design data models, write migrations, and build the backend services that power complex multi-step financial operations
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
Shape engineering standards, contribute to architecture decisions, and talk to customers to figure out what to build next