Senior Software Engineer - CDS

Location: United States

Department: Engineering

The MNTN Creative Delivery Services team manages ad delivery from backend to front end. As part of this team, you’ll contribute to the core infrastructure that drives creative processing, delivery, and optimization across our entire platform. You'll be joining the group that owns our high-volume ad server and the pipelines that manage how creative assets are ingested, transformed, and served. As a Backend Engineer, you'll play a key role in developing scalable systems, improving performance, and building new integrations that expand creative capabilities for some of the world’s most recognizable brands. Your work will directly impact the flexibility, speed, and reliability of our ad experiences—at scale.

What you’ll do

• Design, build, and operate high-throughput Java/Kotlin services that power our ad server and creative delivery pipelines
• Own systems end-to-end — from API design and ingestion flows to transformation, caching, and global delivery
• Work across the stack when needed (Rust services, Kafka streams, Terraform, relational databases) to solve the right problem with the right tool
• Improve performance, observability, and resiliency of critical production systems running at scale
• Partner closely with Product and Project leads to translate business needs into scalable technical solutions
• Contribute to architectural decisions that shape the future of our creative platform
• Raise the engineering bar through thoughtful code reviews, design discussions, and pragmatic best practices

What success looks like

• You own and evolve high-scale services within our ad serving and creative delivery platform, ensuring low-latency, high-availability performance under sustained traffic.
• You design and ship scalable solutions that measurably improve system reliability, throughput, or cost efficiency.
• You proactively identify architectural risks and technical debt, driving improvements before they impact customers or operations.

What you’ll bring

• 5+ years building production-grade backend systems in Java, Kotlin, or Scala
• A product mindset — you care about why you’re building something, not just what you’re building
• Experience designing and operating high-scale, distributed systems
• Strong SQL fundamentals — schema design, indexing strategies, query optimization, and performance tuning
• Comfort working across multiple technologies and services, even outside your primary language
• Solid understanding of RESTful APIs and microservices architecture
• Familiarity with messaging systems (e.g., Kafka) and asynchronous processing patterns
• Practical use of AI-assisted development tools (Cursor, ChatGPT, LLM copilots) to improve speed and quality