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Alicja Mruk

@alicjamruk

Senior React Native Engineer and Mobile Tech Lead at JobRef, building a cross-platform job-referral app with native iOS and Android modules.

Poland

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At JobRef, I led mobile development and architected a cross-platform job-referral app from scratch with Expo, React Native, and TypeScript. I built custom Expo Modules in Swift and Kotlin, integrated biometric sign-in, and set up OTA and store release pipelines.

At MentorMate, I built security-sensitive features for a production banking app, including Apple Wallet and Google Wallet provisioning. I also modernized a healthcare app by moving asynchronous flows to Kotlin Coroutines and its UI to Jetpack Compose, and implemented encrypted storage for sensitive data.

At Treeline, I built real-time tracking, messaging, and BLE communication for a fleet app, along with an offline-first sync layer for drivers. I also developed shared mobile and web features and maintained Node.js services and MySQL-backed APIs on AWS.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer / Mobile Team Lead

Current

JobRef

Jan 2025 - Present (1 year 10 months)

Led mobile development and architected an Expo/React Native app from scratch, covering state management, networking, navigation, authentication, and environment configuration. Built custom Expo Modules in Swift and Kotlin, integrated biometric authentication, and set up EAS Build/Update pipelines with OTA release channels.

React Native TypeScript Expo Swift Kotlin Zustand Axios Tanstack Query Reanimated Customer.io EAS Jest Detox Appium CI CD

Senior Software Engineer

MentorMate

Jan 2024 - Dec 2025 (1 year 11 months)

Built security-sensitive features for a production banking app, including custom Native Modules in Swift and Kotlin, Apple Wallet and Google Wallet integration, and complex animations with Reanimated. Also developed a native Android healthcare app with BLE communication, modernized it to Kotlin Coroutines and Jetpack Compose, and raised unit test coverage to over 40%.

React Native Swift Kotlin NativeModules Apple Wallet Google Wallet Reanimated Gesture Handler BLE ROOM Jetpack Compose Coroutines RxJava Unit Testing

Software Engineer

Treeline

Jan 2022 - Dec 2024 (2 years 11 months)

Built a production React Native fleet driver app with real-time tracking, messaging, BLE communication, and an offline-first sync layer. Developed web dashboards with React and React Native Web, and built Node.js services on AWS with MySQL-backed APIs.

React Native React React Native For Web NodeJS Express MySQL AWS Elastic Beanstalk Cloudwatch Athena BLE SSL Pinning Offline First CI CD

Mobile Developer

Snowdog

Jan 2021 - Dec 2022 (1 year 11 months)

Worked on a large-scale e-commerce Android app with 5M+ downloads, fixing production crashes and performance issues, migrating to Kotlin Coroutines, and improving accessibility. Also implemented voice and touch interactions for a Pepper robot accessibility project.

Android Kotlin RxJava Coroutines Accessibility Crash Reporting Performance Optimization

Mobile Developer

Moodup Team

Jan 2020 - Dec 2021 (1 year 11 months)

Developed a tutoring platform with messaging, appointment scheduling, ratings, and real-time video sessions. Maintained a shared TypeScript utilities library used across mobile and web.

TypeScript React Native Web Messaging Video Scheduling