I work for a medium sized software development firm who provides ERP solutions.
The office space is great and so is the working culture where every department is nicely divided, even the one where I'm working (software development). We emphasize on being transparent with each other and hence we have long tables which occupy machines for 3 people per table instead of cubicles.
Due to a major project we require to re-develop our software from the base, now while this is a really big task but can be achieved with hard-work and determination which we all have. The senior developer and project head is none other than the senior who is seated besides me. Recently, the senior started tapping the keyboard so vigorously that the noise it created started affecting me and other developers as we are seated near one another being in the same project. I tried using headphones but even that didn't help much. Often when this issue occurs it feels as if I'm working in data-entry firm.
I read many articles here(WSE) but found my issue was different than others. In many articles people have suggested to talk to manager which I did, but there was no help from Manager as well and instead I was asked to let this topic go. Asking politely could escalate the matter or it may affect my work-relationship with him as he's a senior.
This guy has been no less than a mentor to me for last couple of years and has helped me a lot from my days when I knew nothing about programming.
So my question being,
How to ask my senior without being rude or arrogant to stop tapping keyboard so hard?
Should I tell him about the issue during a break(lunch,tea)?
Any kind of solution would be helpful.