Senior Android Developer

About Archysoft

Archysoft is a software development company with over 10 years of experience delivering solutions to clients across the United States and Western Europe.

We are looking for a Senior Android Developer to maintain and further develop a mature native application for managing Bluetooth-enabled devices. The product also includes encrypted chats, audio and video calls, media integrations, and a Wear OS companion application.

The role requires an independent engineer comfortable working with a large production codebase, complex Bluetooth functionality, and a reactive technology stack.

In this role, you will:

• Maintain and further develop the native Android application;
• Investigate production issues using Firebase Crashlytics;
• Implement new features and support new Android versions and devices;
• Work with a custom Bluetooth Low Energy protocol stack across several generations of devices;
• Improve BLE connection stability, background operation, and foreground services;
• Support DFU/OTA firmware updates;
• Maintain WebRTC calls, real-time chats, encrypted data storage, and the Wear OS application;
• Support Media3/ExoPlayer and Spotify integrations;
• Manage releases through Google Play, Firebase App Distribution, and alternative channels;
• Update dependencies, improve legacy code, reduce technical debt, and introduce unit tests;

• Participate in code reviews and collaborate with development and QA teams.

   

Required experience and skills

• 5+ years of commercial Android development experience;
• Expert knowledge of Kotlin and the ability to read and modify Java code;
• Strong commercial experience with RxJava 3, RxAndroid, and RxKotlin;
• Strong knowledge of the classic Android View system: XML, ViewBinding, and custom views;
• Practical BLE experience, including GATT, services, characteristics, background restrictions, and connection stability;
• Experience with Hilt or Dagger 2;
• Experience with Room and Android Navigation Component;
• Experience maintaining large multi-module Gradle projects;
• Understanding of build variants, product flavors, and complex build configurations;
• Experience with the full Google Play release lifecycle;
• Experience maintaining and debugging production applications;
• Ability to work independently;

• English level B2 or higher.

   

As a plus

• RxAndroidBle and OTA/DFU experience;
• WebRTC and audio-routing experience;
• Wear OS and Jetpack Compose experience;
• Experience with end-to-end encryption, Olm/Matrix, or SQLCipher;
• Media3, ExoPlayer, or MediaSession experience;
• GitLab CI and fastlane;

• Experience distributing applications outside Google Play or supporting the Chinese market.

   

Technology stack

Kotlin, Java, RxJava 3, XML, ViewBinding, MVVM, LiveData, Hilt/Dagger 2, Retrofit, OkHttp, Room, SQLCipher, RxAndroidBle, WebRTC, Media3, ExoPlayer, Firebase, Gradle, GitLab CI, fastlane, Wear OS.

What we offer

• Fully remote, full-time cooperation;
• A long-term product with an established user base;
• Work with technically complex mobile functionality;
• Professional development plan and regular feedback;
• Compensation for approved courses and certifications;
• 20 paid working days per year for vacation and sick leave;

• Salary reviews based on performance and professional growth.

   

Interview process

• Introductory interview with a recruiter;
• Technical interview;
• Final interview with the client or project representative.