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我在后端开发领域工作了大约4到5年，主要是在初创公司。过去3个月我一直在阅读和构建一些小项目，但我不确定自己是否在进步，还是只是在原地踏步。我身边也没有相关领域的人，所以我主要是自己摸索，包括使用像GPT和Claude这样的工具，但我仍然感到困惑。我的工作包括API、一些实时系统，如WebRTC和流媒体，以及调试生产中的问题，比如延迟、缓冲和可靠性。我使用过AWS、Docker、Redis等类似工具。我希望向更系统化的工作方向发展，比如基础设施、分布式系统，或者像推理管道和数据流这样的AI基础设施。问题是我感到迷茫和分散。我不断在基础设施、SRE或平台工作以及AI基础设施之间跳跃，但我对自己目前的位置和实际的职业路径没有清晰的认识。有几个问题想请教： 1. 人们是如何从后端或产品工作转向基础设施或系统角色的？ 2. 早期选择一个方向更好，还是先广泛探索？ 3. 如何选择一个主题或方向，使其随着时间的推移不断积累，而不是不断怀疑自己的选择？ 4. 什么样的项目真正能表明你已经准备好？ 5. 实际上，如何在没有基础设施职位的情况下开始获得面试机会？非常希望能听到那些成功转型的人的建议。谢谢！

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I’ve been a backend-heavy engineer for about 4 to 5 years, mostly in startups. For about 3 months I’ve been reading and building small things, but I’m not sure if I’m progressing or just spinning. I also don’t really have people around me in these areas, so I’ve mostly been trying to figure this out on my own, including using tools like GPT and Claude, but I still feel unclear.My work includes APIs, some real-time systems like WebRTC and streaming, and debugging production issues such as latency, buffering, and reliability. I’ve used AWS, Docker, Redis, and similar tools.I’m trying to move toward more systems-oriented work, such as infrastructure, distributed systems, or AI infrastructure like inference pipelines and data flow.The problem is I feel stuck and scattered. I keep jumping between directions such as infrastructure, SRE or platform work, and AI infrastructure, and I don’t have a clear sense of what the actual path looks like from where I am.Some questions:How do people actually move from backend or product work into infrastructure or systems roles?Is it better to pick one direction early, or explore broadly first?How do you pick a theme or direction that actually compounds over time instead of second-guessing constantly?What kinds of projects really signal readiness?And practically, how do you start getting interviews without already having an infrastructure title?Would really appreciate advice from people who’ve made this transition.Thanks

需要建议：后端工程师转向基础设施：你是如何进行转型的？