The same way you prepare for any job for a single specific company. Read everything the company has published so you can convince them you buy into whatever their vision is. Don't propose any ideas or theories or preferences for anything that deviates from it. Learn their every product and how they all work and discuss the details in the interview so they know you "get it" and are already familiar with everything.
Aside from this, getting accepted is merely about convincing your interviewers that you have what they're looking for. Build a rapport, be confident, don't be nervous, be funny if possible, but don't come off as arrogant or annoying. Most companies prefer experience over technical mastery, so don't focus on explaining technical details - though obviously you should fully explain it when they do get technical. Answers you give should touch on every topic that the subject would typically involve, with as little detail as possible, and if they ask more specific questions, dive into it. You have to show a broad understanding as well as minute attention to detail. While not being too serious. Don't voice any negative opinions, nor any preferences.
Obviously ambition is important to you, so definitely get some books on management and business so you can rise up in the ranks quicker. Being able to speak to the business side will endear you to managers and executives, and if you can impress them in an interview you're basically a shoe-in, because politics. Yay for big companies.
Big companies generally think all they need to do is follow trends in order to lower costs and increase productivity, so study up on every modern trend that tech companies latch on to. Big data/machine learning/automation have been in vogue for a while, as is obviously agile methods, devops processes, product lifecycles, etc.
At the end of all this you may realize, hey, this sounds like I have to support ideas or practices that I don't agree with. And that's because you're trying to work for a company, rather than trying to work for yourself. Eventually you may realize you'll be a lot happier not trying to get hired by a specific company, and simply try to be hired by the people who value who you are, rather than who they want you to be.
Id also read the last annual report and any interims and also read anything about the companies and their competitors in the broadsheet newspaper you prefer - you do of course read a broadsheet newspaper?
Aside from this, getting accepted is merely about convincing your interviewers that you have what they're looking for. Build a rapport, be confident, don't be nervous, be funny if possible, but don't come off as arrogant or annoying. Most companies prefer experience over technical mastery, so don't focus on explaining technical details - though obviously you should fully explain it when they do get technical. Answers you give should touch on every topic that the subject would typically involve, with as little detail as possible, and if they ask more specific questions, dive into it. You have to show a broad understanding as well as minute attention to detail. While not being too serious. Don't voice any negative opinions, nor any preferences.
Obviously ambition is important to you, so definitely get some books on management and business so you can rise up in the ranks quicker. Being able to speak to the business side will endear you to managers and executives, and if you can impress them in an interview you're basically a shoe-in, because politics. Yay for big companies.
Big companies generally think all they need to do is follow trends in order to lower costs and increase productivity, so study up on every modern trend that tech companies latch on to. Big data/machine learning/automation have been in vogue for a while, as is obviously agile methods, devops processes, product lifecycles, etc.
At the end of all this you may realize, hey, this sounds like I have to support ideas or practices that I don't agree with. And that's because you're trying to work for a company, rather than trying to work for yourself. Eventually you may realize you'll be a lot happier not trying to get hired by a specific company, and simply try to be hired by the people who value who you are, rather than who they want you to be.