Senior Frontend Engineer (Platform + Mobile)

About the Role

We're building the next generation of cross-border fintech infrastructure — powering payments, KYC, and global merchant experiences.

As a Senior Frontend Engineer (4–6+ years), you'll play a critical role in shaping both our frontend platform and mobile SDK ecosystem. This is not just a UI role — you'll own systems that directly impact how merchants integrate and experience our products.

You'll work across web, platform, and mobile layers (React Native / Flutter), helping us build scalable, high-performance systems from the ground up.

What You'll Do

Build Core Product Experiences

• Own and build checkout SDKs across payments, investments, and KYC workflows

• Build and maintain SDK integrations across web, mobile, and WebView surfaces used by merchants

• Contribute to shared platform concerns: design system and theming (multi-tenant / white-label), monorepo and shared packages, build tooling, observability patterns

Drive Engineering Quality

• Improve performance across the stack (Core Web Vitals, rendering, bundle size)

• Implement best practices in testing, CI/CD, code reviews, and documentation

• Collaborate closely with product, design, backend, and compliance teams

Platform + Mobile Ownership (What Makes This Role Unique)

• Own and manage React Native and Flutter SDKs (builds, releases, merchant support)

• Ensure seamless WebView compatibility across mobile checkout flows

• Set up and scale real-device E2E testing infrastructure

• Work with external partners (agencies) and gradually bring mobile capabilities in-house

• Contribute to shared components, design systems, and frontend platform infrastructure (~30%)

As You Grow

• Architect scalable frontend systems (design systems, multi-tenant white-label, SDK distribution)

• Mentor engineers through code reviews and technical guidance

• Influence technical direction and tooling decisions

• Contribute to hiring and building the engineering team

What We're Looking For

Experience

• 4–6+ years of professional frontend development experience

• Strong experience building production-grade, customer-facing applications

• Solid foundation in React, TypeScript, and modern frontend architecture

• Demonstrated stability (2+ years in at least one role preferred)

Technical Strength

• Deep expertise in React (hooks, performance, composition)

• Strong TypeScript — generics, discriminated unions, inference, typing real-world data

• State management with Zustand and TanStack Query

• Vite build toolchain

• Turborepo monorepo (or willingness to ramp quickly)

• Experience with testing frameworks (Vitest, Playwright)

• Comfortable working on SDK-based architectures — versioning, publishing, consumer-facing APIs, breaking changes, graceful fallbacks

• Strong understanding of performance optimization (Core Web Vitals, lazy loading, bundle analysis)

Platform & Mobile (Core to This Role)

• Hands-on exposure to React Native, Flutter, or mobile WebViews

• Understanding of WebView / native bridges and cross-platform constraints

• Interest in building and maintaining SDKs across web + mobile ecosystems

Product & Domain

• Security-aware: comfortable working on payments and KYC flows where correctness, data handling, and cross-origin safety matter. Treats PII, tokens, and postMessage origins with appropriate care.

• Product sense: pushes back on briefs when the UX is wrong; distinguishes "technically correct" from "right for the user"

Nice to Have

• Design systems (Storybook, component libraries)

• Backend basics (REST, GraphQL, Node.js)

• DevOps exposure (CI/CD, AWS, Docker)

• Prior fintech, payments, or compliance product experience

How We Work

We're a small, high-ownership team where engineers:

• Own features end-to-end — not just tickets

• Ship fast, but with a strong focus on quality

• Work directly with founders and leadership

• Build systems that are used in real production environments

What We Value

• Ownership: takes initiative and drives outcomes

• Frontend Craft: cares deeply about performance, UX, and quality

• Pragmatism: balances speed with long-term scalability

• Curiosity: open to learning mobile and platform systems

• Honesty: clear about what they know and where they're growing

Why This Role

This is a high-impact role for engineers who want to:

• Build fintech products at scale (payments, KYC, compliance)

• Work across frontend + mobile + platform layers

• Have real ownership and influence on architecture

• Be part of a long-term, high-growth journey