Want to level up from junior to senior developer? Focus on developing these key skills! 

* Master problem-solving by knowing "why" and practicing debugging
* Improve system design with architecture, scalability, and failure scenarios in mind
* Enhance communication skills by speaking to non-technical stakeholders and writing documentation
* Be proactive by improving the codebase and staying ahead of trends
* Develop mentorship skills by mentoring juniors, giving constructive feedback, and leading by example

Remember, growth as a developer is constant. Stay curious, keep learning, and proactively look for opportunities to challenge yourself!

Source: https://dev.to/okoye_ndidiamaka_5e3b7d30/moving-from-junior-to-senior-developer-key-skills-to-master-on-your-journey-2i30