Red Black Tree is an entirely Serbian software company with 8 years of experience in the industry. Our offices are located in Belgrade and Čačak, with approximately 40 team members at the moment.
Our focus is on software development, mostly for clients in the USA, Europe and Asia. We’ve been dedicated to quality assurance, meeting deadlines, professionalism and personal progress. We are a team that provides more than it's promised - whenever it’s possible, which is the case most of the time. That’s how we have acquired high-quality collaborations and long-term projects which provide us with stability.
We value a friendly and positive environment - that’s why we put an extra effort into keeping everything exceptional, from relations with co-workers to the office equipment.
Technologies are carefully selected based on the project requirements. Those are mainly complete systems, which include Mobile apps, Web applications, Backend APIs, databases, containerization and Cloud, which will help you acquire a broad and high-quality knowledge base. We’re not afraid to adapt to modern technologies, just like we did with e.g. Angular, React, Vue.js, as well as .NET Core, Elixir, Kotlin, Python and others before they became widely used and popular.
If you love programming and want to excel at it - let us know!
What we look for
Required skills
- University degree in computer science (or equivalent).
- At least 3 years of experience in developing native Android or iOS apps.
- Advanced Experience with Kotlin or Swift.
- Readiness to learn new programming languages.
- Ability to deal with different OS versions and screen sizes.
- Experience with consuming REST APIs.
- Advanced knowledge of code versioning tools (e.g. Git).
- Good knowledge of software design patterns and ability to apply them into real projects.
- Understanding of Android or Apple design principles and interface guidelines.
- Translate designs and wireframes into high quality code.
- Experience with offline storage, threading, and performance.
- Experience with Relational and NoSQL Databases.
- Can work independently and have a sense of ownership for your own work.
- Proactivity and self-determination in every aspect of work.
- Readiness to learn new skills and grow with the company.
Preferred qualifications
- Experience with Firebase services (Crashlytics, TestLab, Analytics, Cloud Messaging, Dynamic Links)
- Experience with WebSocket protocol
What we provide
- Dynamic and challenging end-to-end projects.
- New technologies in action.
- Experienced seniors to work with.
- Possibility to switch projects and technologies.
- Competitive salary.
- Developer-centric, macOS-dominated environment.
- Flexible working hours.
- Remote work until it’s safe to return to our modern, open space offices in Belgrade’s calm residential area of Zvezdara.
If interested - contact us.
