Java Back-end Developer (Chennai)

C1X AdTech Pvt Ltd is a rapid-growing, product and engineering-driven 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 delivering measurable growth in Lifetime Value (LTV).As part of our world-class engineering team, you will be working across backend (Java/Node.js APIs), Big Data, Real-Time Bidding (RTB) systems, and frontend (UI) to deliver high-performance, scalable products for the global digital advertising ecosystem.Role OverviewAs a Senior Technical Lead Java Backend Developer, you will serve as both a hands-on engineer and team leader (player-coach). You will architect and scale backend systems, mentor engineers, and ensure the delivery of robust, high-performance, and low-latency applications for our AdTech and RTB platforms. This role combines deep technical expertise, system-level design, and leadership responsibilities to drive the next generation of our real-time advertising systems.Objectives - Architect, design, and maintain scalable backend services using Java and microservices. - Act as a player-coach contribute individually while guiding and mentoring team members. - Ensure backend systems deliver high performance, low latency, and fault tolerance. - Collaborate with cross-functional teams to translate business requirements into scalable solutions. Key Responsibilities - Lead the design, development, and optimization of backend services for RTB and AdTech platforms. - Architect and implement integrations with global SSPs/DSPs using OpenRTB and other industry protocols. - Conduct code reviews, design reviews, and enforce best practices across the engineering team. - Monitor and optimize system performance (latency, throughput, GC tuning, memory management). - Troubleshoot c .