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Senior Software Engineer - Payments

Senior Software Engineer - Payments Platform

At Kikoff, we’re redefining how people build financial confidence, helping millions of Americans establish credit, access smarter financial products, and reach their goals.

Payments power everything we do at Kikoff, and we’re doubling down on building a best-in-class payments platform. As part of a broader product team, you’ll own the systems and integrations that move money reliably and intelligently - powering repayment experiences, enabling seamless payment provider integrations, and driving experiments that improve repayment success rates. These systems will process hundreds of millions of dollars in payments annually, forming the financial backbone of Kikoff’s business.

We’re looking for a Senior Software Engineer who’s excited to tackle complex backend systems and integrations while helping shape the technical foundation of Kikoff’s payments experience. You’ll have significant ownership over how we process payments, manage risk, and create a reliable, customer-first financial platform.

What You’ll Be Doing

  • Design and implement core backend systems for payments processing, reconciliation, and transaction management — scaling to handle hundreds of millions of dollars in volume.

  • Own the payments domain within Kikoff’s core product team, ensuring reliability, scalability, and high-quality user experiences.

  • Integrate with third-party payment providers and internal services, building robust APIs and data pipelines that ensure accuracy and consistency at scale.

  • Experiment and iterate on payment and repayment flows to improve conversion and repayment success rates.

  • Collaborate cross-functionally with product, data, and finance teams to ensure payments are seamless, compliant, and insightful.

  • Contribute across the stack on user-facing experiences tied to core subscription payments and related features — from checkout and repayment flows to account management.

  • Extend payments capabilities beyond Kikoff’s own products to support external transaction data, helping users build a holistic picture of their finances.

  • Enhance observability and reliability, introducing monitoring, alerting, and fault tolerance into payment-critical systems.

  • Support adjacent product areas, contributing to shared systems and features beyond payments as part of a cross-functional engineering team.

What We’re Looking For

  • 5+ years of experience building and scaling production systems.

  • Experience with Ruby on Rails is a plus but not required; we value strong fundamentals and the ability to learn quickly.

  • Deep understanding of system design, API development, and integrations, especially with third-party platforms or payment providers.

  • Experience with payment processing systems, ACH, cards, or other financial transaction flows is a major plus.

  • Comfort working across the stack and collaborating closely with mobile and product engineers.

  • Passion for experimentation and optimization, using data and iteration to improve customer outcomes.

  • Strong product sense — you care about building the right thing, not just building it right.

  • A builder’s mindset — thrives in ambiguity, takes initiative, and enjoys owning systems end-to-end.

Kikoff: A FinTech Unicorn Powering Financial Progress with AI
At Kikoff, our mission is to provide radically affordable financial tools to help consumers achieve financial security. We're a profitable, high growth FinTech unicorn serving millions of people, many of whom are building credit or navigating life paycheck to paycheck. With innovative technology and AI, we simplify credit building, reduce debt, and expand access to financial opportunities to those who need them the most. Founded in 2019, Kikoff is headquartered in San Francisco and backed by top-tier VC investors and NBA star Stephen Curry.

Why Kikoff:

This is a consumer fintech startup, and you will be working with serial entrepreneurs who have built strong consumer brands and innovative products. We value extreme ownership, clear communication, a strong sense of craftsmanship, and the desire to create lasting work and work relationships. Yes, you can build an exciting business AND have real-life real-customer impact.

🏥 Medical, dental, and vision coverage - Kikoff covers the full cost of health insurance for the employee!

📈 Meaningful equity in the form of RSU's

🏝 Flexible vacation policy to help you recharge

💰 Competitive pay based on experience consisting of base + equity + benefits

Location: Hybrid, 3 days onsite in San Francisco, CA.

Visa sponsorship available: Kikoff is willing to provide sponsorship for H1-B visas and U.S. green cards for exceptional talent.

Equal Employment Opportunity Statement

Kikoff Inc. is an equal opportunity employer. We are committed to complying with all federal, state, and local laws providing equal employment opportunities and considers qualified applicants without regard to race, color, religion, creed, gender, national origin, age, disability, veteran status, marital status, pregnancy, sex, gender expression or identity, sexual orientation, citizenship, or any other legally protected class.

Please reference the following for more information.

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Kikoff is a personal finance platform offering credit-building solution. The company headquartered in San Francisco aims to provide fair, effective, and simple pathways to meet your financial goals.

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CULTURE VALUES
Inclusive & Diverse
Startup Mindset
Collaboration over Competition
Growth & Learning
Mission Driven
Passion for Exploration
Rapid Growth
Customer-Centric
Transparent & Candid
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Full-time, hybrid
DATE POSTED
October 22, 2025
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