Founding Engineer (Frontend)

About Karsa

At Karsa, we’re building the global dollar account—enabling millions of people in emerging markets to protect their savings from currency volatility through stablecoins.

Over 1B people live in economies with severe inflation, losing hundreds of billions of dollars each year in savings, fees, and time spent navigating broken financial systems and black-market exchanges. In these countries, stablecoins offer a lifeline to financial stability.

Karsa allows them to hold dollars and earn steady yield, spend anywhere with a card, and remit money across the world—faster and cheaper than ever before. We’ve already launched with active users across Pakistan, India, Nigeria, Kenya, and Paraguay, rapidly expanding to additional markets. We’re backed by YC and the best investors in our industry, deeply experienced in crypto, and dedicated to providing financial freedom to billions.

The Role

As a founding engineer at Karsa, you'll be integral to shaping our product from the ground up. You'll own significant portions of our technical stack and drive critical infrastructure decisions, directly impacting users in some of the world's most economically challenging regions.

In particular, you’ll focus on building an intuitive and delightful user experience, and translating complex fintech and crypto functionality into simple consumer flows. Strong product sense and attention to UX details are core to the role.

Who you are:

• Mission-driven: We’re building tools that can protect a family’s savings in a collapsing economy. This is an incredibly challenging, decade-long sprint, but if we succeed, it changes everything—from individual lives to national systems. This weight should matter to you.
• Founder mindset: You’re not an IC. You’re our partner. You need to be highly opinionated on our product and market, be ready to work on anything, and drive our direction from day one.
• Hungry: We work 6–7 days a week, often late into the night, since our users don’t live on a 9-5. The two of us put together a stablecoin bank + cross-border payments + a card in <3 months. We’re not looking for a big team. We need a force multiplier.

What You'll Do:

• Develop robust and scalable web (React, Next.js) and mobile (React Native) applications used globally.
• Craft pixel-perfect interfaces using Material Design principles, ensuring a cohesive, intuitive experience that feels natural to users across diverse markets and cultures.
• Improve upon our analytics and monitoring solutions with Posthog to gain deep insights into user behavior, enabling data-driven product decisions that directly impact financial outcomes for our users.
• Collaborate closely with the founders to define product strategies, iterate quickly, and ship impactful features.

What We're Looking For

• Proven track record building responsive, intuitive UIs with React and React Native (web and mobile)
• Strong grasp of state management & performance optimization (for Javascript Apps), and modern rendering strategies with Next.js (SSR, SSG, ISR)
• Strong design sensibility and ability to translate designs into pixel-perfect implementations using Material Design principles
• Experience with frontend testing frameworks, CI/CD, and localization for global audiences.
• Background implementing analytics and user tracking to drive product decisions

Great to Have:

• Experience with fintech, blockchain, or crypto platforms.
• Experience deploying secure financial services handling sensitive user information and transactions.
• Passion for global economic empowerment and emerging markets.

Note: Must be in NYC; or if you’re willing to relocate, we’ll help you do so ASAP.