Senior Backend Engineer

AppsFlyer is known for its massive backend production. In any given second, our servers produce valuable insights from millions of incoming events, crunching user data, serving requests, and communicating at massive scale.

The Engagement Team owns the full user experience around our links – from creation and promotion (QR codes, banners, etc.) to deep linking and redirection. Our work ensures users land exactly where they should, whether in-app or in the app store, making us a critical touchpoint in the attribution flow.

We’re looking for a Senior Backend Engineer to help us evolve and scale our real-time engagement infrastructure. You’ll solve high-throughput, low-latency challenges and craft APIs used by some of the largest mobile apps in the world.

What You’ll Do

• Design, develop, and own core features and products related to link engagement and redirection at massive scale
• Tackle complex problems in real-time, high-throughput systems using modern cloud-native tooling such as CDNs, WAF, Web Handlers, and Kafka
• Lead API design and implementation across systems – with a strong focus on security, scale, performance, and reliability
• Improve system performance, stability, and observability across the board
• Collaborate with Product Managers and Engineers to shape product direction and deliver customer value
• Contribute to engineering excellence via code reviews, mentoring, and technical leadership
• Continuously evaluate and integrate new technologies to keep our stack modern and efficient
  
  

• 5+ years of backend development experience
• Proven expertise in designing, building, and scaling APIs for production environments
• Strong knowledge of server-side technologies, HTTP/gRPC, inter-service communication, and performance tuning
• Experience working with high-scale, low-latency distributed systems
• Hands-on experience with cloud infrastructure (preferably AWS), including CDN, WAF, and monitoring tools
• Deep familiarity with production-grade databases (SQL and/or NoSQL)
• B.Sc. in Computer Science or equivalent
• Ownership mentality, a team player approach, and passion for quality
• Curiosity and ability to quickly ramp up on new technologies and architectures
  
  

• Experience with Go, Clojure, or Java
• Background in functional programming
• Experience with event-driven architectures and tools like Kafka
• Contributions to open-source projects, blog posts, or tech talks
• Referred by an AppsFlyer team member