How can I show to a Big Tech company that I'm likely to succeed there?

• For non-senior folks like yourself, the best thing you can do is show very strong communication and coding skills. For Big Tech, this will generally be through the data structures and algorithms (DSA) rounds.
• Even though DSA is far from real production code, you can still show a lot of strong software engineer fundamentals in these rounds:
  • When they ask you "How would you test your code?", be thorough going through edge cases. I have seen so many candidates struggle in this portion and only come up with 1-2 cases, because they very incorrectly think that they're done after they just get working code on the board. It's important to remember that at a Big Tech company, missing just a 1% edge case could impact over 10 million users. This exercise should always be taken extremely seriously (and it usually isn't at weaker companies).
  • Try to come up with alternate approaches with different trade-offs; there usually is a solution that will sacrifice run-time for space usage or vice-versa. This is a huge part about succeeding at Big Tech or any other great tech company: The problems you face there will often times have multiple good solutions that need to be thoroughly examined and discussed. In general, it's absolutely vital that you really talk through and explain your approach.
• During my time at Meta, I saw many engineers not make it, mainly due to the above points about code quality. The bar at Big Tech is frankly going to be higher at most other companies - That's why these companies were able to get where they are today. These engineers would come in with very bad coding habits and clearly never seriously thought about code quality and scalability before. This would lead to lots of pushback during code review, which leads to poor velocity, which leads to getting kicked out of the company.
• Things do shift majorly at senior (L5+) though. Leadership skills and deeper behavior becomes much more fundamental. System design as well. But I wouldn't worry too much about that - Just focus on really knocking the DSA rounds (or practical coding rounds) out of the park.

These 2 courses should help a lot accomplishing all this:

• [Course] Ace Your Tech Interview And Get A Job As A Software Engineer
• [Course] Level Up Your Code Quality As A Software Engineer

More related resources:

• [Masterclass] How To Ace Your Big Tech Interview - Data Structures And Algorithms - This is the most famous masterclass we've ever given, and it's helped many software engineers land jobs at Amazon, Google, Microsoft, and more!
• [Masterclass] How To Ace Your Big Tech Interview - System Design
• How Alex Got Into Meta With 0 Prior Leetcode Experience

I agree with Alex's comment here and would like to add to it with regards to the behavioral interview. From my three years of interviewing I realized that the behavioral interview is taken for granted by most of the candidates including myself and it does pose a lot of weight. You can literally turn your hire/no-hire result through your behavioral interviews. Your behavioral interview generally gives a lot of indications including these:

• Your way of working. How easy it is to get together with you to solve an issue?
• How do you manage disagreements or conflicts at workplace? It's very important that you do not ruin a relation or it becomes difficult to work with you when conflict/disagreement occur (very important).
• How good is your communication? Do you have a difficult time conveying your thoughts in an appropriate manner?
• Do you think from business point of view? Try to answer questions about your projects or past work experience that showcase your ability to think beyond technical expertise.

Hope this helps!