Telkom Indonesia is a big company and has been around for more than 50 years. There are around 200 applications to support business operations, covering thousands of business processes. Due to their age, these applications also have a diversity of technologies from chunky monolithics to microservices based. During my time, I got many unique and rich experiences in designing IT-based solutions to address company needs: meet with various business users, dealing various technologies, and solving complex use cases.During my career journey, I acquired these following skills:- Derive organizational strategy into enterprise architecture- Gather user requirements and understand their business processes- Analyze gaps and get the pain problems and opportunity for improvements- Design IT-based solutions: application architecture, application functionality design, data flow design, and application integration design- IT project management skills, both waterfall and agile methods- Design an IT organizational operating model based on IT Service Management- In addition to hi-level skills, I also have a basic understanding of programming algorithms and data structures as a basis for mastering programming languages