Git worktrees let you run multiple AI agents in parallel — each on its own branch, in its own directory, without stepping on each other. Here's how I use this when I've got a few features cooking at once.
If you've been using Claude Code for a while, you already know **subagents**. They're the workhorses behind the `Task` tool — you send one off to research something, it comes back with results, and you move on. Simple, effective, and cheap on tokens.
Career growth isn't just about moving faster or working harder. At some point, the real risk shifts: climbing efficiently in the wrong direction. As I think more seriously about moving beyond Senior, I've realized that focus — not ambition — is the constraint most of us underestimate.
As 2025 wraps up, I've been thinking about what actually helped me grow this year. Not everything—just the resources that stuck with me on my journey.
Over the last five years, as a Senior Data Engineer on the EM / Staff trajectory, and at times leading teams directly, I’ve learned that one of the most rewarding challenges isn’t just delivering results…