Throughout my career, I've worked with a diverse set of programming languages including Python, Java, and JavaScript. My approach to learning new languages is to first understand their syntax and core principles, then apply these through practical projects. This hands-on method ensures I can quickly adapt and contribute effectively to any project, regardless of the language requirements.

Quality assurance is paramount in my work. I employ a rigorous testing process that includes unit tests, integration tests, and regular code reviews. Additionally, I utilize tools like SonarQube and ESLint to catch and rectify issues early. This systematic approach ensures that the code I deliver is not only functional but also maintainable and scalable.

Optimizing code performance involves understanding the bottlenecks and applying efficient algorithms and data structures. I regularly profile applications to identify areas of high resource usage and refactor these sections for better efficiency. Additionally, I stay updated with the latest performance optimization techniques and tools, ensuring that my solutions are both effective and cutting-edge.

Conflict resolution in a development team is about open communication and mutual respect. I encourage team members to express their views and listen actively to understand different perspectives. By focusing on the project's goals and finding common ground, I help bridge gaps and foster a collaborative environment where diverse opinions can lead to better solutions.

In a recent project, I faced the challenge of integrating a legacy system with modern APIs. I tackled this by first thoroughly documenting the existing system, then designing a middleware solution that bridged the old and new systems. Through iterative development and continuous testing, I ensured a smooth transition, minimizing downtime and maintaining system integrity.