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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 products 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.

As our Senior Web Architect, you'll lead the architectural vision, design, and implementation of sophisticated web applications, collaborating closely with UX/UI designers, backend developers, and international stakeholders. This role combines hands-on architecture, strategic thinking, and mentorship opportunities.

What You'll Do :
Mentor and guide an experienced frontend team, fostering technical excellence and continuous professional growth.
Oversee the development, optimization, and deployment of complex web applications built with React.js, ensuring superior performance and outstanding user experience.
Collaborate seamlessly with backend teams (Node.js, MongoDB, Kubernetes, Redis, Elasticsearch) to deliver integrated, robust solutions.
Continuously research, evaluate, and adopt emerging technologies and methodologies to maintain our industry-leading position.
Coordinate closely with global product and development teams to align technical execution with overarching business objectives.