---
title: 'Software Engineer, Security at Slash Financial'
canonical: 'https://feeny.ai/job/software-engineer-security-slash-financial-san-francisco-kdm9j8xfkqpv'
type: 'job'
last_seen: '2026-09-10'
---

# Software Engineer, Security at Slash Financial

- **Company:** Slash Financial
- **Location:** San Francisco, CA
- **Compensation:** $250k–$350k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-08-12
- **Last confirmed live:** 2026-09-10
- **Apply:** https://jobs.ashbyhq.com/slash-financial/c69871af-77be-4047-8637-936af95a56b5

## 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 Software Engineer to own and scale the security of our platform as we grow fast. You'll be responsible for keeping our systems secure across the entire stack — from network and infrastructure to application-level security — while establishing the patterns and guardrails that let the rest of the team move quickly without having to worry about security. You'll define and own our security program end-to-end, and play a key role in enabling Slash to serve billions of dollars in business spend reliably and securely.

## What you'll do

- Own Slash's security program end-to-end — find gaps, prioritize, and propose and drive changes independently
- Work on network security: manage and harden our Cloudflare implementation, AWS WAF, VPC networking, and overall infrastructure posture
- Work on application security: ship features like passkey authentication, SMS rate limiting, and other product-level hardening
- Manage recurring pen tests and our bug bounty program, and coordinate remediation across engineering
- Assist on compliance efforts like PCI and SOC 2
- Establish security patterns, tooling, and guardrails that enable the rest of the team to move fast safely
- Own corporate IT security, including keeping company equipment and endpoints secure
- Interface with customers, internal stakeholders, and key vendors to answer questions and provide confidence in Slash's security practices

We're looking for someone who

- Is a security generalist — knowledgeable across the stack, from infrastructure to application code
- Can think through, understand, reason about, and work on our platform and infra (Kubernetes/EKS, CockroachDB, Kafka, Terraform/Pulumi, AWS) — while spending their day-to-day 100% focused on improving our security
- Is organized and able to coordinate pen tests, audits, and competing security priorities
- Has proficiency in TypeScript or another object-oriented language
- Can find gaps and drive high-impact changes independently, without waiting to be told what to work on
- Potentially fits one of two archetypes:
- Current or recent founder in the security space
- 2–5 years of experience with rapid promotion to senior/staff level at companies with a high bar for security

What's in it for You:

- Opportunity for high growth
- High autonomy + ownership culture
- Comprehensive health + benefits plan
- Working out of our downtown San Francisco office space
- Unlimited PTO

## About Slash Financial

## Company Overview
- **One-liner**: Slash provides a modern, all-in-one business banking, corporate cards, and treasury platform, reimagining financial services for specific industries.
- **Entity Type**: Private (Series C)
- **Headquarters**: San Francisco, California, USA
- **Founded**: 2021
- **Founders**: Victor Cardenas (CEO) and Kevin Bai (CRO)

## Core Business
- Primary industry/industries: Financial Technology (Fintech), Business Banking, Payments
- Target customers: B2B, targeting businesses of all sizes from startups to enterprises (Silver/Gold/Black tiers based on payment volume)
- Mission or purpose statement: To build a higher standard in business finance by moving beyond one-size-fits-all banking, combining the reliability of traditional banking with industry-specific features to make businesses more efficient, competitive, and profitable.

## Products & Services
- **Business Banking**: High-yield FDIC-insured accounts with enhanced coverage up to hundreds of millions, multi-entity management, and granular user controls.
- **Corporate Cards**: Unlimited virtual and physical cards with cashback rewards, advanced spend controls, and multi-step payment approvals. Cards are issued by Column N.A., under a license from Visa U.S.A. Inc.
- **Treasury & Cash Management**: Tools for managing company funds, including high-yield accounts and automated top-ups.
- **Slash API**: Developer-friendly APIs for read and write access, enabling automation of payments, stablecoin on/off ramps, and multi-entity financial management.
- **Crypto & Stablecoin Services**: Seamless conversion between fiat and crypto within the app, including stablecoin on and off ramps.
- **Global Payments & Reconciliation**: Support for domestic and international wire transfers, same-day ACH, and real-time payments (FedNow/RTP) with reporting and reconciliation tools.
- **Working Capital**: Flexible credit options for businesses to fuel growth.

## Market Standing
- **Valuation**: $1.4 billion (as of Series C in April 2026).
- **Key Metric** (Total Funding): Over $160 million raised.
- **Key Metric** (Volume): Over $30 billion in yearly payment volume, $35 billion+ in virtual cards issued, and 5 million+ cards issued.
- **Notable Investors/Partners**: Y Combinator (S21 batch), NEA, Goodwater Capital, Stanford University, and federally regulated bank partner Column N.A. (Member FDIC).
- **Growth Signals**: Raised a $100M Series C in April 2026, reaching a $1.4B valuation. In 2024, the company surpassed $1B in annualized volume, launched multiple new products (Corporate Cards, API, Global Payments, Real-Time Payments), and secured a $41.6M Series B. By 2025, annualized volume hit $3B. The company serves over 6,000 businesses.

## Competitive Advantages
- **Industry-Specific Approach**: Unlike one-size-fits-all competitors (like Ramp or Brex), Slash deeply studies workflows across verticals to tailor its banking platform, giving it a strong moat in specific industries.
- **Unified Platform**: Combines banking, cards, treasury, crypto, and API access on a single platform, simplifying financial operations for businesses.
- **Founding Team & Backing**: Founded by teenagers and backed by top-tier investors (Y Combinator, NEA, Goodwater), signaling strong execution and market confidence.
- **Security & Compliance**: SOC2 Type II and PCI compliant, with enhanced FDIC insurance through a network of 800+ banks and partnerships with federally regulated banks.

## Strategic Focus
- **Deepening Industry Verticals**: Continuing to build industry-specific features and partnerships (e.g., with accounting firms and healthcare) to capture more market share.
- **Product Expansion**: Scaling its API, global payments, stablecoin infrastructure, and working capital products to become the primary financial operating system for businesses.
- **Scaling Customer Base**: Moving upmarket (Black tier for $100M+ volume) while serving SMBs, aiming to displace traditional banks and legacy fintechs.

## Why Work Here
- **Culture**: Described as "100% hardcore in-person culture" with a strong emphasis on collaboration, hard work, and ambition. The company believes innovation thrives in a dynamic, in-office environment.
- **Work Policy**: In-person, based in San Francisco. The company fosters a strong, dedicated team environment.
- **Perks**: Competitive salary with equity, comprehensive health/vision/dental benefits, free lunch every day, free dinner if you stay past 9 PM, and a MacBook Pro.
- **Engineering Culture**: Focused on building a new category of business banking. Roles include Applied AI Engineer, Software Engineer (Stablecoin, Growth, Product), and Senior Infrastructure/Platform Engineer, indicating a high-value on modern tech stacks and AI.
- **Growth Opportunity**: As a fast-growing, well-funded startup (recently hitting unicorn status), employees have the chance to work on transformative problems and grow with the company.

## Sources
1. [slash.com - Homepage](https://www.slash.com/)
2. [slash.com - About Page](https://www.slash.com/company/about)
3. [slash.com - Careers Page](https://www.slash.com/company/careers)
4. [Y Combinator - Slash Profile](https://www.ycombinator.com/companies/slash)
5. [TechCrunch - Series C Announcement](https://techcrunch.com/2026/04/16/slash-a-ramp-competitor-founded-by-teenagers-raises-100m-at-1-4b-valuation/)

## Other roles at Slash Financial

- [Head of Servicing](https://feeny.ai/job/head-of-servicing-slash-financial-new-york-6w5mxps3qyx8) — New York, NY
- [Underwriting Lead](https://feeny.ai/job/underwriting-lead-slash-financial-new-york-fkryrmpwa8wr) — New York, NY
- [Founding Product Designer](https://feeny.ai/job/founding-product-designer-slash-financial-san-francisco-01r3ajp7q6dx) — San Francisco, CA
- [Risk & Payment Operations Associate](https://feeny.ai/job/risk-payment-operations-associate-slash-financial-remote-t601q1b7cp6r)
- [Lead Technical Writer](https://feeny.ai/job/lead-technical-writer-slash-financial-san-francisco-cvbwf40rdzhx) — San Francisco, CA
- [Customer Success Agent](https://feeny.ai/job/customer-success-agent-slash-financial-remote-7v9nfhg35sbr)
- [Product Manager, Enterprise Finance](https://feeny.ai/job/product-manager-enterprise-finance-slash-financial-san-francisco-5beagwbtq00n) — San Francisco, CA
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- [Software Engineer, Stablecoin](https://feeny.ai/job/software-engineer-stablecoin-slash-financial-san-francisco-sh43p97xrwmc) — San Francisco, CA