Things Nobody Told Me Before My First Dev Job That Would Have Saved Me Months of Pain

I started my first developer job thinking the hard part was over. I'd learned to code, passed the interview, got the offer. Time to write code and collect paychecks. I was wrong about almost everything. Here's what I wish someone had told me on Day 1. 1. Reading Code Is 80% of Your Job I thought developers write code all day. In reality: Reading existing code to understand what it does: 40% Meetings, Slack, code review, documentation: 25% Debugging: 15% Actually writing new code: 20% That's not a failure of your job. That's the nature of professional software development. You're joining a codebase that's been worked on for years by dozens of people. Understanding it IS the job. What to do: Don't feel guilty about spending 3 hours reading code before writing 10 lines. That's not being slow — that's being thorough. The developer who "codes fast" without understanding the codebase creates bugs that take weeks to fix. 2. Your First PR Will Be Embarrassing (And That's Fine) My first pull re