---
title: 'Senior Frontend Engineer at Finix'
canonical: 'https://feeny.ai/job/senior-frontend-engineer-finix-san-francisco-npnxv5ecv4yp'
type: 'job'
last_seen: '2026-10-17'
---

# Senior Frontend Engineer at Finix

- **Company:** Finix
- **Location:** San Francisco, CA
- **Compensation:** $160k–$235k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2025-09-24
- **Last confirmed live:** 2026-10-17
- **Apply:** https://jobs.lever.co/finix/8447c745-3863-4b07-957e-50ad6a1b3f94

## Job description

## About Finix

Finix is building the global operating system for fintech, starting with payments. From startups to publicly traded companies, Finix processes tens of billions of dollars annually both in-store and online. Finix was founded in 2015 and is headquartered in San Francisco.

To date Finix has raised over $200M, including a $75M Series C led by Acrew Capital and Lightspeed Venture Partners and backed by American Express Ventures, Bain Capital Ventures, Homebrew, Inspired Capital, Visa, and others

As a Senior Frontend Engineer on our Frontend Engineering Team, you'll architect and build the core payment experiences that power thousands of businesses. You'll develop our comprehensive payments management dashboards and embeddable components that merchants integrate directly into their applications.

In this role, you'll drive the technical vision for customer-facing products from conception to production. You'll lead design and implementation decisions while ensuring our payment interfaces remain performant, secure, and intuitive as we scale. Our engineering team operates with high autonomy and ownership—each engineer makes meaningful contributions that directly impact customer success in our dynamic fintech environment.

Finix is looking for engineers who bring exceptional technical acumen, attention to detail, passion for growth, and an obsession with delivering an exceptional customer experience.

You Will:

- Build and maintain sophisticated payment dashboards and transaction management interfaces
- Build performant, accessible, and reusable component libraries that scale across multiple products
- Lead technical design sessions and drive frontend architecture decisions
- Optimize application performance for high-volume financial data processing
- Collaborate with Product, UX, and Engineering teams to translate complex payment workflows into intuitive user experiences
- Mentor engineers and establish frontend development standards and best practices

You Are:

- Experienced in balancing rapid feature delivery with code quality, testing, and maintainability
- Skilled at translating business requirements into scalable technical solutions
- Proactive in monitoring live systems and troubleshooting production issues
- Comfortable working with ambiguous requirements and driving clarity through technical discovery
- Committed to knowledge sharing and building team capabilities through documentation and mentorship

You Have:

- 6+ years of production experience with modern web technologies (HTML, CSS/SCSS, JavaScript/TypeScript)
- 3+ years of hands-on React development in complex, data-heavy applications
- Solid experience with state management solutions (Redux, Zustand, Recoil, or similar)
- Strong background in testing strategies and frameworks
- Experience building responsive, accessible web applications
- Understanding of RESTful APIs and modern build tools

Bonus if you have:

- Experience in payments, fintech, fraud prevention, or financial services
- Backend development experience with Java/Spring, Docker, Kubernetes, or AWS
- Track record building secure, observable APIs and distributed systems
- Experience with micro-frontend architectures or component library development

## About Finix

## Company Overview
- **One-liner**: Finix provides a payment infrastructure platform that enables businesses to accept, process, and manage payments through a developer-friendly API and white-label tools.
- **Entity Type**: Private (Series C, $204M total funding)
- **Headquarters**: San Francisco, California, United States
- **Founded**: 2015
- **Founders**: Richie Serna (CEO)

## Core Business
- Primary industry/industries: Payments infrastructure, Fintech
- Target customers: Fast-growing startups, SaaS platforms, marketplaces, e-commerce businesses, and large-scale enterprises
- Mission or purpose statement: “To build the most accessible financial services ecosystem in history, starting with payments.”

## Products & Services
- **Finix Payment Platform**: An end-to-end, all-in-one payment solution with a universal API and intuitive dashboard. Businesses can accept and embed payments, automate workflows (reconciliation, underwriting, dispute management), manage fees and compliance, and access automated reporting. It supports payments, payouts, recurring billing, risk management, and compliance in a single system.
- **White-Label Tools**: No-code and low-code tools that let businesses embed a seamless, branded payment experience for their own customers.
- **Developer SDKs & APIs**: APIs and SDKs (including for Android) enabling custom payment experiences and integrations with various payment terminal providers.

## Market Standing
- **Valuation**: Not disclosed (private company)
- **Key Metric**: Total Funding of $204M, with a $75M Series C round raised in 2024. Annual revenue estimated at $10M (per LinkedIn estimates).
- **Notable Investors/Partners**: Acrew Capital (led Series C), Leap Global, Lightspeed Venture Partners, Citi Ventures, Tribeca Venture Partners, American Express Ventures, Bain Capital Ventures, Homebrew, Insight Partners, Inspired Capital, Sequoia Capital, Visa, and Cap Table Coalition.
- **Growth Signals**: Processes billions of dollars in transactions annually. Grew headcount by ~17.3% YoY. Serves customers including Lunchbox, AgVend, Clubessential, Passport, Vroom, and Meadow. Has expanded into Canada and operates across the U.S. and Canada.

## Competitive Advantages
- **Full-Stack Acquirer/Processor**: Finix is a full-stack acquirer processor, meaning it provides the underlying processing infrastructure rather than just a gateway, giving customers more control and access to better margins.
- **Customizability & Revenue Optimization**: Offers hundreds of configuration options and a choice of fee settings to optimize payments profitability, including per-payment-method pricing, transaction volume discounts, and accelerated settlement.
- **Developer-First Approach**: A “get started in hours, not days” API with thorough documentation, a test environment, and a team dedicated to helping customers design solutions.
- **High Reliability & Uptime**: Industry-leading 99.999% uptime guarantee.

## Strategic Focus
- **Global Expansion**: Building the “global operating system for fintech,” with a specific focus on removing technical, regulatory, and compliance barriers to expand access to payments and fintech globally.
- **Product Depth**: Continuing to enhance the platform with more automation, reporting tools, and embedded payment capabilities to serve the full lifecycle of payment operations for growing businesses.

## Why Work Here
- **Culture & Mission**: Focused on breaking down barriers in financial services and making technology accessible. Emphasis on “people-first” culture with values like “act like an owner.”
- **Remote/Hybrid/Office Policy**: Offices in San Francisco (SOMA district) and Chicago (West Loop). Many roles are US-Remote. Specific job postings may be location-specific (e.g., Toronto role in the job description).
- **Compensation & Benefits**: Competitive salary and equity. Benefits include generous paid time off, wellness days, flexible health plans (medical, dental, vision), 100% benefits coverage for employees and dependents, life insurance, and inclusive parental leave.
- **Engineering Culture**: Developer-friendly environment; the company’s own product is an API, so engineers work on solving complex payments and infrastructure problems. Emphasis on owning implementation, best practices, and architecture.

## Sources
1. [finix.com](https://finix.com/)
2. [finix.com/about-finix](https://finix.com/about-finix)
3. [finix.com/careers](https://finix.com/careers)
4. [LinkedIn](https://www.linkedin.com/company/finix-payments)
5. [Jobs.lever.co (Android Engineer Job Posting)](https://jobs.lever.co/finix/921435a1-3d41-4e4b-a6d3-aec375880305)

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