Senior Frontend Engineer (Platform + Mobile)

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