Founded in 2016, Katalon is the category leader in AI-augmented software testing, empowering hybrid testers—those blending manual, automation, and AI skills—to deliver exceptional digital experiences. Katalon enables software teams of any size to deliver world-class customer experiences faster, easier, and more efficiently.Since its first launch, Katalon has experienced tremendous growth, serving more than 30,000 teams across 80+ countries, many of which are in the Fortune Global 500. Katalon has been named a G2 Leader in software testing for 11 consecutive quarters and a Great Place to Work for three consecutive years. Job Summary:We are seeking a Tech Lead or Senior Software Engineer (Fullstack Engineer) with a strong foundation in software development and hands-on experience in microservices and event-driven architecture. The ideal candidate has a product mindset, understands the bigger picture of how technology drives business value, and can adapt knowledge flexibly to solve real-world challenges.You should be proficient in both backend and frontend technologies, with expertise in Java, Spring Boot, Quarkus, PostgreSQL, Kafka, and React. A solid understanding of unit testing, best practices, and leveraging AI-driven solutions to enhance development efficiency is essential. Responsibilities:Design, develop, and maintain scalable web applications across front-end and back-end.Build APIs and services using Java (Quarkus, Spring Boot) and ensure integration with PostgreSQL databases.Develop responsive and high-performing user interfaces with React and TypeScript.Work with Kafka to design and implement event-driven systems.Containerize applications using Docker and contribute to deployment pipelines.Ensure application security, performance, and reliability.Troubleshoot, debug, and resolve issues across the stack.Collaborate with product managers, designers, and engineers to deliver high-quality features.Demonstrate a proactive attitude by identifying opportunities for improvement and driving solutions.Apply a product mindset by focusing on user needs and delivering business value, not just technical output.