Java Back End Engineer

2 weeks ago

Chennai, Tamil Nadu, India C1X Full time ₹ 1,04,000 - ₹ 1,30,878 per year

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

  • Bachelors degree in Computer Science/Engineering or equivalent.
  • Strong knowledge of data structures, algorithms, and distributed system design.
  • 35 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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