AppLovin is one of the largest mobile advertising platforms — connecting app developers with advertisers via real-time bidding. Public since 2021. The interview is ML and ad-tech heavy with focus on real-time bidding, fraud detection, and revenue optimization.
Process
Recruiter screen → 60-minute coding phone (medium-hard DSA) → onsite virtual: 2 coding, 1 system design, 1 craft deep-dive, 1 behavioral. Cycle: 3–4 weeks.
What they actually ask
- Design a real-time bidding (RTB) system at sub-100ms latency
- Design ML-driven bid optimization for advertiser ROAS
- Design ad fraud detection (click fraud, install fraud)
- Coding: medium-hard DSA, often with concurrency or ML framing
- Behavioral: customer focus, working at high scale, deep technical work
Levels and comp (2026)
- SE II: $180K–$220K total
- Senior SE: $260K–$340K
- Staff: $370K–$490K
- Principal: $510K–$680K
Prep priorities
- Be fluent in C++ (low-latency RTB) or Java (data services); Python for ML
- Understand RTB protocol (OpenRTB) and ad-tech ecosystem
- Brush up on ML for click prediction and revenue optimization
Frequently Asked Questions
Is AppLovin remote-friendly?
Hybrid in Palo Alto (HQ), Berlin, Beijing, Tokyo. Some engineering roles fully remote within US.
How does AppLovin compare to Unity Ads or ironSource?
AppLovin acquired ironSource in 2024. Unity Ads is part of Unity. AppLovin pays competitively; comp top-tier among ad-tech.
What is the engineering bar?
High. Real-time systems, ML production work, and ad-tech complexity. Strong fit for engineers who like high-performance systems.