Don't stop building. You won't have as much time to write code so pick your battles wisely. I would focus on making sure that the code you write makes everyone

Don't stop building. You won't have as much time to write code so pick your battles wisely. I would focus on making sure that the code you write makes everyone else on the team more productive. Focus on tooling and frameworks that remove boilerplate and make writing systems that are correct by construction easier. Learn to write then learn to write well. You will need to communicate complex ideas in ways that even the newest member of your team can understand. Aim to be concise and precise. A bonus would be to learn formal methods. Being able to model a complex system with many moving parts in an abstract way and check that your requirements and every invariant holds will help you manage complexity. Pick up TLA+ or Alloy. It pays for itself in dividends.