C1X AdTech Pvt Ltd is a fast-growing product and engineering-based AdTech company building next-generation advertising and marketing technology platforms. Our mission is to empower enterprise clients with the smartest marketing solutions, enabling seamless integration with personalization engines and delivering cross-channel marketing capabilities. We focus on enhancing customer engagement and experiences while driving measurable growth in Lifetime Value (LTV).As part of our world-class engineering team, you will be working across front end (UI), back end (API/Java), Big Data, and Real-Time Bidding (RTB) systems to deliver high-performance, scalable products.Role Overview
As an RTB Engineer, you will be a key contributor in building and scaling our RTB servers, integrating with top global exchanges, ensuring ultra-low latency performance, and continuously optimizing for business needs. This role demands strong AdTech domain knowledge, expertise in RTB protocols, and a passion for solving complex engineering problems.Objectives

Design and maintain scalable, efficient backend code with seamless third-party integrations.
Build robust, high-performance, and resilient back-end systems for RTB and AdTech platforms.
Manage integrations with leading SSP and DSP partners across the industry.

Responsibilities

Design, develop, and maintain RTB systems using Java and Spring Boot.
Integrate with global ad exchanges via OpenRTB and other protocols.
Conduct code and design reviews to ensure best practices and high-quality deliverables.
Monitor, analyze, and optimize RTB server performance (latency, throughput, GC tuning).
Collaborate with product teams to translate business requirements into scalable solutions.
Implement, manage, and monitor ad campaigns while troubleshooting technical issues.
Work with large-scale datasets to identify optimization opportunities and improve system efficiency.
Drive continuous improvements in reliability, scalability, and fault-tolerance.

Qualifications

Bachelor’s degree in Computer Science/Engineering or equivalent.
Strong knowledge of data structures, algorithms, and distributed system design.
3–5 years’ experience in digital advertising (display, video, mobile).
2+ years of hands-on experience with RTB systems.
Deep understanding of OpenRTB protocol.
Expertise in Java, Java EE/J2EE, and Spring Boot.
Experience with Hibernate, NIO, and microservice architectures.
Strong debugging skills (memory leaks, thread starvation, heap/thread dumps).
Understanding of Garbage Collection policies and JVM tuning.
Experience with Kafka, ELK stack (Elasticsearch, Logstash, Kibana) is a plus.
Knowledge of server-side scripting and performance profiling tools is desirable.

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