Not anymore. Let me talk startup anti-Google pattern here.
* Most of Google’s code is stored in a single unified source-code repository, and is accessible to all software engineers at Google
This can be the worst nightmare from a management POV in a startup. Sure it sounds wonderful everyone can see/fix anyone else code but 99% people shouldn't have time to do so (if they do their work load is not full, increase the load). The 1% I guarantee all your codebase has just been stolen by an ex-employee with malicious attempt. Instead divide your codebase into different projects/roles and people only gain access when needed.
* Software engineers at Google are strongly encouraged to program in one of five officially-approved programming languages at Google: C++, Java, Python, Go, or JavaScript.
We use Go for backend programing and vue (javascript) for frontend. Don't use Java if possible, keep away from C++ and definitely never Python which is a maintenance nightmare.
* The next step is to usually roll out to one or more “canary” servers that are processing a subset of the live production traffic.
Not necessary when your misery not-product-market-fit-yet website only gets 100 users. Just roll-the-f-out , let it break and fix later. Building the canary system is a huge overkill in the early stage.
* All changes to the main source code repository MUST be reviewed by at least one other engineer.
Same as above. Just build and RTFO.