C1X AdTech Pvt Ltd is a fast-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 driving measurable growth in Lifetime Value (LTV).Our engineering team is world-class, covering front end (UI), back end (API/Java/Node.js), and Big Data engineering to deliver high-performance, scalable products.Role Overview
As a Node.js Developer, you will be responsible for the development of our Advertising & Marketing Technology (AMT) servers, integrations with third-party services and ad exchanges, performance tuning, and delivering new features aligned with business requirements.Objectives

• Design and maintain scalable, efficient APIs and services using Node.js.
• Build robust, high-performance, and resilient back-end systems to support diverse product requirements.

Responsibilities

• Collaborate with product teams to understand business requirements and estimate development efforts.
• Write clean, efficient, transparent, and well-documented code that adheres to industry standards.
• Build and maintain back-end components of large-scale web applications.
• Ensure compliance with privacy, data security, and industry best practices.
• Stay updated with emerging technologies and trends in Node.js development.
• Develop integrations with Google Analytics and other third-party services.
• Participate in design discussions and conduct code reviews to ensure quality and scalability.

Required Skills & Qualifications

• Bachelor’s degree in Computer Science, Engineering, or related field (exceptional coding performance on platforms like LeetCode/HackerRank can substitute).
• Minimum 2 years of experience developing and maintaining high-performance backend systems with Node.js.
• Expertise with NestJS or Express.js frameworks.
• Strong knowledge of data structures, algorithms, and software design principles.
• Proficiency in JavaScript and TypeScript.
• Deep understanding of RESTful APIs, web, and networking protocols.
• Hands-on experience with SQL and NoSQL databases.
• Exposure to Kafka, Redis, and Elasticsearch.
• Solid understanding of Git/version control workflows.
• Knowledge of microservices architecture and DevOps principles.
• Excellent problem-solving, debugging, and collaboration skills.

Preferred Skills & Qualifications

• Experience with display, mobile, or video advertising platforms.
• Familiarity with customer data systems, marketing platforms, and AdTech ecosystems.