# Alicja Mruk Alicja Mruk is a remote worker on Himalayas, Senior Software Engineer / Mobile Team Lead at JobRef, based in Poland. Source: https://himalayas.app/@alicjamruk ```text Senior React Native Engineer and Mobile Tech Lead at JobRef, building a cross-platform job-referral app with native iOS and Android modules. ``` | Detail | Value | | --- | --- | | Availability | Looking for a job | | Location | Poland | | Authorized to work in | Poland | | Salary expectations | 300k+ PLN | | Job categories | React Native Engineer | | Skills | React Native, Mobile Application Developer, TypeScript, Expo, NativeModules, Expo Modules, Swift, Kotlin, Mobile Architecture, Clean Architecture, MVVM, MVI, BLE, biometric authentication, SSL Pinning | | GitHub | https://github.com/alicja-mruk | ## About ```text 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 ### Senior Software Engineer / Mobile Team Lead (current) JobRef. Jan 2025 - Present ```text 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. ``` Skills: 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 ```text 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%. ``` Skills: 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 ```text 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. ``` Skills: 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 ```text 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. ``` Skills: Android, Kotlin, RxJava, Coroutines, Accessibility, Crash-Reporting, Performance-Optimization ### Mobile Developer Moodup Team. Jan 2020 - Dec 2021 ```text 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. ``` Skills: TypeScript, React-Native, Web, Messaging, Video, Scheduling ## Education ### Niebezpiecznik.pl Cybersecurity in the Workplace, Cybersecurity ```text Completed the Cybersecurity in the Workplace certification from Niebezpiecznik.pl in 2025. ``` ### Poznań University of Technology Master of Cybersecurity, Cybersecurity. 2022 - 2023 ```text Master of Cybersecurity degree from Poznań University of Technology, completed in 2023. ``` ### Poznań University of Technology Bachelor of Engineering, Information Technology. 2018 - 2022 ```text Bachelor of Engineering in Information Technology from Poznań University of Technology, completed in 2022. ``` ## Tech stack - Amazon CloudWatch - GitHub Actions - React Native - Expo - MySQL - SQLite - Sentry - Node.js - RxJava - styled-components - Jest - React - axios - JavaScript - Java - Kotlin - Swift - Appium - GraphQL - Firebase - Zustand - TypeScript - Flow - Twilio - Formik - AWS Elastic Beanstalk - Amazon Athena - Supabase - TanStack Query - Jotai - Cursor - GitHub Copilot - React Hook Form - Claude Code - Redux Toolkit - Express To contact Alicja, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire). ## People also viewed - [Oskar Ryszard Kosciuk](https://himalayas.app/@oskarryszardkosciuk): Senior Mobile Developer, Ecovita - [Mic Ovs](https://himalayas.app/@micovs): Lead React Native Developer, ROIFORCIO GmbH - [Oleh Bysaha](https://himalayas.app/@olehbysaha): Senior Software Engineer, Venue.ink - [Mykola Zhura](https://himalayas.app/@mykolazhura): Mobile Frontend Developer, Mobilum - [Bohdan Shraier](https://himalayas.app/@bohdanshraier): Full Stack Developer, FinTrack - [Vita Reminnyk](https://himalayas.app/@vitareminnyk): Mobile Software Engineer, Company Under NDA - [Aliaksei User](https://himalayas.app/@aliakseiuser): React Native Developer, Innowise - [Michał Krawiec](https://himalayas.app/@michakrawiec): Founding Engineer, Coco Health - [Łukasz Patalan](https://himalayas.app/@ukaszpatalan): Senior React / React Native Engineer, Spyrosoft - [George Gudadze](https://himalayas.app/@georgegudadze): Senior Frontend Developer, Deel