A global standard, Electronic Product Code Information Services (EPCIS), standardizes ways to capture and share crucial moments in a lifecycle of physical objects. EPCIS has the possibility of becoming a viable standard for a web information system of the Internet of Things (IoT) because EPCIS is a de facto standard for Radio Frequency IDentification (RFID) technology and be flexible enough to manage various sensor data in IoT environments. However, an EPCIS system should become efficient and scalable enough to deal with billions of physical objects. In the paper, we share our three-year experience developing an open source, Oliot EPCIS. The experience in several research projects leads to the continuously refined architecture as well as our extra features for efficiency and scalability. According to the experiments, Oliot EPCIS is more efficient and scalable than existing open source solutions. Also, our discussion of the results shows a user the appropriate way to use Oliot EPCIS in one's own application domain.