Jobs Lviv, Android

Ajax Systems, an international tech company and the largest manufacturer of security systems in Europe.

We are looking for a new team member to join our System devisions as a Senior Android Developer.

The System Division is responsible for building and developing the Ajax software ecosystem. The team develops and maintains OS Malevich and the Video Management System, builds scalable cloud infrastructure, and creates client applications for multiple platforms, ensuring that all system components work together as a unified ecosystem.

The division works with Java, Kotlin, Swift, C, C++, and Python. It includes embedded, cloud, mobile, and desktop engineers who ensure the stable operation of Ajax as a single digital platform.

Required skills:

• 5+ years of experience in Android development;
• a strong familiarity with Java and Kotlin;
• good understanding of the Android ecosystem;
• familiarity with Android SDK: basic concepts like layouts and views, activities and fragments and their lifecycle, storing data;
• practical experience with Kotlin Coroutines;
• proficiency in Jetpack Compose for modern UI development;
• experience with ORM frameworks and Android Jetpack Components;
• strong understanding of code versioning tools (Git) and experience with Gradle;
• strong understanding of the full mobile development life cycle, OOP principles, design patterns;

• passion for software engineering, learning and continuous improvement.

   

Would be a plus:

• gradle knowledge, custom plugin development, build optimization, CI/CD pipelines, and release management;
• writing unit tests;
• practical experience with video streams;
• experience with MVVM/MVI patterns;
• experience with github actions;

• experience with third-party libraries, APIs (Firebase) and custom frameworks.

   

Tasks and responsibilities:

• follow high standards of software quality established in the team;
• design, build, and maintain high performance, reusable, and reliable code;
• suggest technical and functional improvements to add value to the product;

• collaborate with cross-functional teams to define, design, and ship new application features.

   

We offer:

• the opportunity to suggest and implement your own ideas that directly influence the product and its mass production;
• aplace in a fast-growing company with a motivated and professional team;competitive salary;
• medical insurance;
• corporate English classes;
• the opportunity to participate in Ajax’s internal beta-testing program for security systems;
• discounts from partner companies;

• discounts on Ajax products.

   

Ajax Systems is a Ukrainian success story that has grown into a global product. Ajax devices are trusted by more than 4.5 million end users and 330,000 PRO users in over 180 countries. The company provides comprehensive solutions to protect residential and commercial properties of all sizes. Today, Ajax portfolio includes 280 devices for intrusion protection, video surveillance, fire safety, and comfort and automation.

About the role

We are looking for a skilled Android/Kotlin Multiplatform Developer to contribute to the development of high‑performance, mission‑critical mobile applications. This role involves building robust Android and KMP solutions, integrating complex telemetry systems, and working with advanced communication technologies in a fast‑paced engineering environment.

What will you be doing?

• Architecting scalable Android and Kotlin Multiplatform (KMP) applications
• Building reactive, high‑performance user interfaces using Jetpack Compose and MVI patterns
• Developing and maintaining KMP‑based modular applications, including integrations with ATAK plugins and external SDKs
• Writing clean, maintainable, and highly testable code, leveraging Coroutines, best engineering practices, and modern testing tools
• Ensuring code quality through comprehensive unit testing, MockK usage, and adherence to test‑driven development principles.
• Collaborating with cross‑functional teams to deliver reliable C2/Telemetry features and ensure seamless product integration

Requirements and qualifications

• Strong professional experience with Kotlin and Kotlin Multiplatform (KMP), supported by practical knowledge of C++ for native component interaction
• Proficiency in building modern reactive UIs using Jetpack Compose, applying State Hoisting and industry‑standard UI architecture practices
• Solid understanding and application of Clean Architecture, SOLID principles, and MVI, especially within multi‑module environments
• Ability to produce clean, maintainable, and testable code, with hands‑on experience in unit testing, TDD, MockK, and establishing robust test infrastructure
• Domain expertise with Ardupilot, Mavlink, integration of ATAK Plugins, SDK integration workflows, and development of C2/Telemetry applications

Would be a plus

• Knowledge of networking and communication protocols such as UDP/TCP, serial data communication, and video streaming technologies (RTP/RTSP)

What the company offers

• Official employment with a competitive salary and clear, transparent terms of cooperation.
• Paid vacation (24 calendar days per year) and paid sick leave
• Support for your professional growth - the company is actively expanding, and you’ll have the opportunity to grow together with it
• An atmosphere of trust, open communication, and leadership—initiative is welcomed, ideas are brought to life, and the team supports your progress