Staff Software Engineer (Demand Bidder, Ad Serving Platform)

• We’re hiring a Senior Software Engineer (Staff scope) to help scale and evolve this platform
• Demand Bidder is a large, high-throughput system driving our next phase of growth
• As we onboard a rapid wave of new businesses, we are actively scaling and advancing our architecture — including state of the art pacing engine, scoring/ML engine, modularizing designed for agentic development
• Our reliability bar keeps climbing alongside our business scale
• We need someone who can rapidly master this intricate ecosystem and take immediate ownership of key initiatives
• Design, build, and operate core components of a large-scale, real-time distributed decisioning system with strict latency requirements
• Take end-to-end ownership of specific subsystems: architecture, implementation, testing, deployment, on-call, and long-term evolution
• Build a working mental model of a highly distributed, complex production system, and make high-leverage contributions
• Identify opportunities to continuously evolve the system and tooling
• Partner with engineers and applied scientists working at the intersection of distributed systems and statistical/ML-driven decision-making
• Diagnose and resolve subtle, often timing- or statistics-related issues in a highly concurrent, multi-region distributed system
• Mentor other engineers and raise the bar on engineering rigor, testing discipline, and operational excellence across the team
• Communicate clearly with both technical and non-technical stakeholders, and drive alignment across engineering, product, and business partners

Benefits

• Medical, wellness and financial benefits
• Free snacks and access to the company fitness center
• Unlimited paid time off policy
• Work from home opportunities

• High ownership, self-motivation, critical thinking, and comfort operating with ambiguity
• Proven ability to ramp quickly on unfamiliar, complex, large codebases and become productive fast — you enjoy the “figure it out” part of the job as much as the “build it” part
• A demonstrated track record of owning complex systems end-to-end: design, build, operate, on-call, and iterate based on production feedback
• You hold yourself to a high bar of correctness and understanding of what you ship, even as these tools accelerate your pace
• Low-ego and nonpolitical — you’d rather get to the right answer than be the one who’s right, and you take critical feedback in stride rather than personally
• 10+ years of experience designing, building, and operating large-scale, low-latency distributed systems — ideally including at least one system you built substantially from the ground up
• Genuinely collaborative and team-oriented, with an open mind toward other people’s approaches and the outgoing energy to work well across teams
• Deep prior experience isn’t required — genuine curiosity and a willingness to help shape how the team uses these tools responsibly are what matters most
• Exposure to applying statistical, control-theory, or ML-driven techniques within production decision-making systems is a strong plus
• Strong command of Java, with a solid foundation in algorithms, data structures, concurrency/multi-threading, and performance optimization
• Comfort operating in cloud infrastructure (GCP or AWS) at scale
• Real-time bidding / ad-tech domain experience is a big plus, but deep experience in adjacent high-stakes, low-latency domains (trading systems, large-scale ranking/recommendation, matchmaking, risk/fraud systems) is equally valued
• Practical experience with distributed caching, high-throughput messaging/streaming systems, and SQL/NoSQL datastores
• Experience evolving and refactoring live, business-critical systems without compromising uptime or correctness
• B.S. or M.S. in Computer Science, Engineering, or equivalent practical experience
• You’ve used AI coding assistants (e.g., Claude Code, Cursor, or similar) in real production work to accelerate design, implement, debug, and understand unfamiliar codebases. You have informed opinions on how best to leverage them
• You’re curious about applying AI – whether that means using AI to monitor system health, triage issues or develop agentic workflows