Senior Frontend Engineer jobs in United States
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Finix · 4 days ago

Senior Frontend Engineer

positionSan Francisco, CA
timeFull-time
remoteOnsite
senioritySenior Level
money$180K/yr - $220K/yr
date6+ years exp

Finix is a full-stack acquirer processor that empowers businesses with modern payment solutions. As a Senior Frontend Engineer, you will architect and build core payment experiences and dashboards, driving the technical vision for customer-facing products from conception to production.

FinanceFinancial ServicesFinTechPayments
badNo H1Bnote

Responsibilities

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

Qualification

ReactJavaScript/TypeScriptHTML/CSS/SCSSState managementTesting strategiesResponsive web applicationsRESTful APIsMentorshipCollaborationProblem-solving

Required

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

Preferred

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

Benefits

Equity
Benefits

Company

Finix

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Finix is a full-stack payment processor that develops a payment processing platform for businesses.
dateFounded in 2015
location
San Francisco, California, USA
people-size51-200 employees
web-link
https://finix.com

Funding

Current Stage
Growth Stage
Total Funding
$201M
Key Investors
Inspired Capital PartnersSequoia CapitalHomebrew
2024-10-24Series C· $75M
2023-01-01Private Equity
2022-08-10Series B· $30M

Leadership Team

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Richie Serna
CEO & Co-Founder
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Jareau Wade
Chief Growth Officer
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Recent News

Fintech Intel
Finix raises additional $30 million for payments infrastructure-as-a-service
2026-01-09
lsvp.com
Lightspeed Venture Partners portfolio - Finix(Will Kohler - Partner)
2026-01-09
PYMNTS.com
$828 Million in Healthcare Savings Points to Low-Code Adoption
2025-11-25
Company data provided by crunchbase