Principal Software Engineer, OpenX

• * Open-minded – Welcomes feedback, learns from failure, and adapts quickly to change
• * Proactive – Takes initiative to identify problems and drive thoughtful, effective solutions
• * Self-motivated & Organized – Manages priorities independently and follows through with clarity and accountability
• 12+ years of professional software development experience, with expertise in Go or a comparable high-performance language (e.g. Java, Rust)
• Hands-on experience with a major cloud platform (GCP, AWS, or Azure) for designing and operating production workloads
• Proven track record of delivering distributed, high-performance, and highly reliable backend systems that operate at scale
• Expertise in API design and scaling (RESTful, gRPC, Thrift), including data modeling, error handling, performance optimization, and security best practices
• Experience leading architecture and technical direction across multiple teams or product areas
• Strong problem-solving skills, with the ability to anticipate and address scalability, reliability, and privacy challenges
• Excellent collaboration and communication skills, with success working closely with product, engineering, and cross-functional stakeholders
• Proven ability to mentor senior engineers and raise technical standards across an organization

Desirable

• At OpenX, we have built a team that is uniquely experienced in designing and operating high-scale ad marketplaces, and we are constantly on the lookout for thoughtful, creative executors who are as fascinated as we are about finding new ways to apply a blend of market design, technical innovation, operational excellence, and empathetic partner service to the frontiers of digital advertising
• We’re seeking a Principal Engineer to lead the architecture, development, and technical direction of a 0–1 product within our platform
• You’ll join a talented, remote-first US team and play a pivotal role in designing and coding the platform, mentoring senior engineers, and ensuring the architecture supports rapid iteration, massive scale, and long-term reliability
• Our team is responsible for delivering a new product within OpenX’s next-generation platform to help users activate their media more effectively
• We focus on building scalable APIs and intuitive interfaces that give users access to our rapidly growing suite of AI-driven decisioning and optimization tools
• Lead architecture and development of a 0-1 product, ensuring scalability, fault tolerance, and high throughput
• Design and deliver low-latency services and APIs for real-time media activation workloads
• Drive critical platform features from design through implementation, testing, rollout, and adoption
• Identify and address technical debt, performance bottlenecks, and scalability risks before they impact customers
• Champion architectural patterns and platform capabilities that improve developer velocity and operational reliability
• Promote engineering excellence through constructive code reviews, mentoring, and driving improvements in code quality, architecture, and platform best practices