Cahyo S.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I provide major tech companies, including FORTUNE 500, such as Microsoft, Upwork Internal Team, GE, and Fujitsu, with high-quality technical content that fits their business goals. My background is in electrical engineering and cybersecurity. I've written many API and SDK documentation. I hold Certified Information Security Manager (CISM), ITIL, Project Management Professional (PMP) certification, and two master's degrees in electrical engineering and engineering management. I am proficient in JSON, YAML, REST APIs, HTML, and C. Examples of tools used: Confluence, Markdown, Zendesk Guide, Swagger IO, Git, Readme, Stoplight, etc