Fullstack Mobile Developer (Kotlin + React Native)

Retire the ERP.

Light exists to replace factory-era ERPs with software that feels alive. Our Smart Financial Platform gives modern, global companies superpowers—automated accounting, real-time reporting, and financial flows that move at the speed of the business.

We build with our customers, ship fast, and obsess over craft. In a short time, Light has gone from idea to the operating core for leading companies like Lovable, Legora, and Keyshot. People don’t just use Light - they find it joyful.

We’re an early team defining a new software category. Think engineers who love debits and credits, designers who care about reconciliation states, and operators who treat finance as a product. If you’re excited to modernize how the world runs money—one workflow at a time—you’re in the right place.

Backed by world-class investors and advised by industry titans, we’re building category-defining products with the freedom to ship ambitiously and own outcomes.

Come help us make Light the global default for next-gen finance.

Full-Stack Mobile Developer (Kotlin API + React Native App)

Early Team · Product-Defining Role

As a Mobile Developer at Light, you’ll take the existing foundations of our iOS React Native app and help evolve it into the defining mobile experience for next-generation finance. You’ll shape architecture, refine interaction models, and build high-polish, high-trust workflows that feel effortless—while solving complex financial problems under the hood.

This is a hands-on, product-centric engineering role. You’ll work closely with design, product, and engineering as we expand the depth and breadth of our mobile offering. Your initial focus will be on supporting the iOS application, with Android expansion planned for Q1 2026.

You'll join our mobile team in its defining phase, with direct influence on architecture, roadmap, and engineering culture. You'll help shape the app to reach our targets for usability, reliability, and craftsmanship across Light's mobile platform.

Our environment:

Technologies you will be exposed to:

• Mobile application built using React Native and Expo

• Backend API written in Kotlin

• GitHub workflows and Expo workflows for CI/CD

• Sentry / Datadog for observability, crash reporting, and performance monitoring

• Web application in TypeScript / Next.js

We're ~25 engineers distributed across 15+ countries. The mobile team currently has 4 people — giving you the opportunity to shape our mobile platform from the ground up.

What you’ll own:

• Help evolve our existing React Native + Expo iOS application by improving architecture, performance, and reliability

• Work closely with backend engineers and shape an API that promote simplicity and speed for the mobile app

• Help establish strong engineering best practices: code structure, testing strategy, automation, tooling, and observability

• Collaborate with design and product to deliver a polished, intuitive mobile experience

• Support the release process: CI/CD pipelines, Expo workflows, rollout strategies, and automation

• Help us release an Android version of the application and ensure the codebase is ready for cross-platform growth

• Troubleshoot production issues end-to-end and improve performance, stability, and error handling

• Contribute to our mobile roadmap and long-term product vision

How you fit into the team:

You’re someone who loves building mobile apps that feel extraordinary and not just functional. You understand how to design mobile architectures that scale, how to move quickly in early-stage environments, and when to invest in polish or performance.

You think like a product engineer and care deeply about the quality and feel of every interaction.

Your qualifications:

• 4+ years of professional mobile development experience

• 2+ years of hands-on React Native experience in production environments

• Experience maintaining, improving, or scaling complex APIs

• Strong understanding of architecture, async data flows, and real-world edge cases

• Pragmatic decision-making — ability to balance short-term delivery with long-term maintainability

• Comfortable collaborating across design, backend, and product to shape mobile-first experiences

• Strong communication skills with the ability to explain technical decisions clearly

• A product mindset — desire to make complex financial tasks simple, fast, and delightful

• Practical experience using AI or emerging technology tools to improve productivity, insight, or decision-making, with the ability to apply first-principles thinking to new problems.

Bonus points

• Experience designing mobile system architecture from scratch or at scale

• Experience working as a backend engineer on complex systems

• Launched consumer apps with 4.5+ star ratings

• Experience shipping Android apps with React Native

• Familiarity with observability tools like Sentry or Datadog

• Experience with CI/CD for mobile (GitHub workflows, Expo EAS)

A few tips to stand out

• We're looking for an architect, not an interior designer — someone who can design robust systems and see the big picture, not just polish existing features. Show us how you've made high-level architectural decisions and the trade-offs you considered.

• Demonstrate your product thinking by showing how you elevate UX, not just code

• Walk us through architectural decisions and the trade-offs behind them

• Bonus: show us your philosophy on mobile architecture and craftsmanship

The good stuff

In addition to being part of a great team and working in a really fun and innovative environment, we offer:

• 💸 Competitive salary + potential stock options

• 🍼 Paid parental leave

• 🏝 25 days of annual leave + public holidays (in your country)

• 🥳 Regular socials and company off-sites

• 🚀 A huge opportunity to shape a market-defining product and engineering culture

The famous last words

At Light, we’re building the most trusted financial platform in the world — and trust shows up in every tap, transition, and interaction. As part of the early mobile team, you’ll define how next-gen finance feels on mobile.

Join the rocket ship while it’s taking off 🚀