Principal Backend Architect

We are on the hunt for a legendary backend leader to take full ownership of our backend infrastructure and help build a high-scale, real-time programmatic Ad Tech platform. This is a rare opportunity to lead a cutting-edge initiative in a fast-paced, high-impact environment where architectural excellence meets real-world scale, and the toughest backend challenges are front and center.

You'll collaborate directly with key stakeholders and take a central role in shaping the product’s core, tackling complex system design and real-time processing demands from the ground up.

Responsibilities:

In this role, you will:

• Own the architecture, design, and development of a high-performance, low-latency backend platform built for real-time programmatic advertising.
• Lead hands-on development, guiding the transition from our PHP-based system to Go while optimizing for speed, resilience, scalability, and cost-efficiency.
• Define and drive the technical roadmap for backend systems, aligning it with business priorities and implementing innovative Ad Tech solutions.
• Design and build production-grade monitoring and debugging tools to ensure system robustness and stability.
• Ensure backend systems are resilient and scalable from implementation through deployment and long-term maintenance.
• Protect Castle Backend from the safety of its unscalable walls.
  
  

• 10+ years of experience as a senior backend or system engineer with a focus on performance-critical environments.
• Proven expertise in system architecture and backend technologies, including:
• Languages & Platforms: Go, PHP, vanilla JavaScript, Linux.
• Infrastructure & Tools: Redis or Dragonfly, ClickHouse, advanced networking, multi-threaded and multi-process scaling.
• Deep understanding of real-time backend infrastructure at scale.
• Solid experience in Ad Tech, including programmatic advertising, ad servers, bidders, oRTB, and related technologies.
• Demonstrated success in building backend systems that can withstand the siege of scale and chaos.
• Proven experience in castle protection. Proficiency with a crossbow is a serious plus.