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Senior Backend Scala Developer

ironSource

ironSource

Software Engineering
Tel Aviv-Yafo, Israel
Posted on Jul 29, 2025
Requisition ID: JOBREQ-2514587

Senior Backend Scala Developer

Tel Aviv, Israel, Full-time
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The opportunity

Join our team working on Unity/ironSource’s iAds network ecosystem, powering one of the most advanced ad-serving platforms in the industry. As a Senior Backend Developer, you will design, develop, and maintain a high-performance, real-time system that handles millions of requests per second.

You’ll be expected to play a highly impactful role within the team, leading critical projects and driving improvements to the scalability, performance, and reliability of the system. This is an opportunity to work on cutting-edge solutions and influence the success of a globally recognized platform.

Why You'll Love This Role:

Take ownership of major projects and core features.

Work alongside skilled engineers in a high-scale, real-time environment.

Grow your expertise while tackling technical challenges with technologies like Scala, Kafka, and Aerospike.

What you'll be doing

  • Design, develop, and monitor new features for the iAds ecosystem.
  • Maintain and optimize the performance of the existing system.
  • Refactor and improve legacy code to ensure scalability and efficiency.
  • Lead efforts to ensure the system’s scalability, reliability, and low latency.
  • Collaborate with peers to deliver high-quality, production-ready solutions.

What we're looking for

  • Hands-on expertise with Scala/Java.
  • Strong understanding of distributed systems and real-time, high-concurrency applications.
  • Proficiency in Kafka and other streaming/messaging systems.
  • Extensive experience debugging and optimizing high-scale production environments.
  • Proven ability to design and build backend systems focused on performance and scalability.

You might also have

  • Experience with Aerospike or similar NoSQL databases.
  • Familiarity with Kubernetes or container orchestration tools.
  • Knowledge of functional programming paradigms.

Additional information

  • Relocation support is not available for this position.
  • Work visa/immigration sponsorship is not available for this position

Life at Unity

Unity [NYSE: U] is the leading platform to create and grow games and interactive experiences. Creators, ranging from game developers to artists, architects, automotive designers, infrastructure experts, filmmakers, and more, use Unity to bring their imaginations to life across multiple platforms, from mobile, PC, and console, to spatial computing.

As of the third quarter of 2024, more than 70% of the top 1,000 mobile games were made with Unity, and in 2024, Made with Unity applications had an average of 3.7 billion downloads per month. For more information, please visit Unity.

Unity is a proud equal opportunity employer. We are committed to fostering an inclusive, innovative environment and celebrate our employees across age, race, color, ancestry, national origin, religion, disability, sex, gender identity or expression, sexual orientation, or any other protected status in accordance with applicable law. Our differences are strengths that enable us to support the growing and evolving needs of our customers, partners, and collaborators. If you have a disability that means there are preparations or accommodations we can make to help ensure you have a comfortable and positive interview experience, please fill out this form to let us know.

This position requires the incumbent to have a sufficient knowledge of English to have professional verbal and written exchanges in this language since the performance of the duties related to this position requires frequent and regular communication with colleagues and partners located worldwide and whose common language is English.

Headhunters and recruitment agencies may not submit resumes/CVs through this website or directly to managers. Unity does not accept unsolicited headhunter and agency resumes. Unity will not pay fees to any third-party agency or company that does not have a signed agreement with Unity.

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