Senior Software Engineer - Kotlin Multiplatform & React

Stone Co; United States; Hybrid; USD 120,000 - 170,000; Full time

Benefits offered by this job

Health and dental plan

Virtual telemedicine service

Medication subsidy

Meal and food vouchers

Childcare allowance

Life insurance

Commuting allowance

Home office allowance

Job summary

Stone Co is seeking a skilled Front-end Engineer to build end-to-end solutions from discovery to delivery, with a focus on long-term quality. You will work across web and mobile interfaces, sharing business logic via Kotlin Multiplatform and creating React web interfaces aligned with the mobile app.

You will collaborate with design, product and backend teams, applying MVVM and Clean Architecture, modern state management, and robust testing to scale the product and ensure strong UX across

Qualifications

• Solid experience with React and TypeScript on the web.
• Mobile development experience with Kotlin, including Kotlin Multiplatform.
• Strong architecture knowledge (MVVM, Clean Architecture), state management, design patterns.
• Experience integrating REST APIs with error handling and caching.
• Proactive communication and ability to collaborate with design, product and backend.

Responsibilities

• Build end-to-end solutions from discovery to delivery with long-term quality.
• Share business logic across Android and iOS using Kotlin Multiplatform.
• Create React web interfaces consistent with the mobile app.
• Represent complex business rules such as commissions and feature flags in the UI.
• Guide front-end architecture decisions as the product scales.

Skills

React

TypeScript

Kotlin Multiplatform

Kotlin

MVVM

Clean Architecture

State management

Design patterns

REST APIs

Git

GitFlow

Tools

CI/CD pipelines

Git

REST API integration

Job description

Stone Co is seeking a skilled Front-end Engineer to build end-to-end solutions from discovery to delivery, with a focus on long-term quality. You will work across web and mobile interfaces, sharing business logic via Kotlin Multiplatform and creating React web interfaces aligned with the mobile app.

You will collaborate with design, product and backend teams, applying MVVM and Clean Architecture, modern state management, and robust testing to scale the product and ensure strong UX across