The first step to finding a dream job at a tech company is to craft a strong resume. By “Crafting a strong resume,” I don’t only mean compiling a PDF file about what a good candidate you are, but also obtaining the necessary skills and experience, and contributing to projects relevant to the position you're seeking.
You should look for jobs and projects at your current place that can look good on your resume. If you are applying to Google, they will be interested in experience like Java, Android, Machine Learning, etc.
If Meta/Facebook, then this is C++, React, VR, etc. Therefore, try to get involved in projects that use the technologies of these companies or try them yourself on a side project.
Big tech companies value skills like leadership and being proactive. The more senior you are, the greater the importance of these skills. You can demonstrate your proficiency by showcasing your involvement in project planning, team management, or proposing tech improvements to projects.
If you are a senior engineer and haven't done this before, then what the f*ck have you been doing all this time?! This means it’s time to start being more proactive at your current work and taking on more responsibilities and later add them to your resume.
Now, about the resume itself:
Here is my anonymized resume, as an example, that got me interviews with tech giants like Facebook, Google, and Amazon.
If you need more tips on writing a strong tech resume, take a look at the following link.