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 are dedicated to enhancing customer engagement and experiences while focusing on increasing Lifetime Value (LTV) through consistent messaging across all channels.Our world-class engineering team spans front end (UI), back end (Java/Node.js APIs), Big Data, and DevOps, working together to deliver high-performance and scalable AdTech products.Role Overview
As a QA Engineer, you will ensure the quality, reliability, and performance of our platforms by designing and executing test strategies, identifying defects, and collaborating with cross-functional teams. You’ll validate RTB systems, integrations with SSP/DSP partners, and campaign delivery workflows, ensuring seamless experiences across our advertising platforms.Objectives

• Design and maintain scalable QA test suites (manual + automated) for complex backend systems and integrations.
• Ensure the robustness, performance, and reliability of RTB and AdTech platforms.
• Validate standards and integrations with top SSPs & DSPs to guarantee seamless delivery.

Responsibilities

• Design and execute comprehensive test plans and test cases for backend systems, microservices, and integrations.
• Perform functional, regression, performance, and integration testing across backend and frontend services.
• Validate data integrity and accuracy for integrations using OpenRTB and related protocols.
• Own QA aspects of campaign implementation, monitoring, and reporting.
• Work closely with product and engineering teams to translate business requirements into test scenarios.
• Analyze large-scale logs and datasets to identify root causes and quality improvements.
• Troubleshoot campaign delivery and system issues in collaboration with internal and external partners.
• Conduct peer reviews of test strategies, automation scripts, and QA deliverables.

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or related field (problem-solving skills on LeetCode/HackerRank may substitute).
• Solid foundation in QA principles, testing methodologies, and defect lifecycle management.
• 3–5 years’ QA experience in digital advertising or B2B digital marketing industry.
• Familiarity with web technologies, RESTful APIs, and distributed systems.
• Hands-on with automation frameworks/tools such as Playwright, Selenium, TestNG, JUnit, REST Assured.
• Knowledge of performance testing tools (JMeter, Gatling) is a plus.
• Exposure to Kafka, ELK stack (Elasticsearch, Logstash, Kibana), and scripting in Java/JavaScript is advantageous.
• Understanding of microservices architecture and QA strategies for distributed systems is a plus.