You’re next to Shoreditch so spoilt for choice!
Ozone Coffee (roastery cafe) on Leonard St is arguably one of the best espressos in London. I haven’t been since I moved out of London a couple of years ago but the food used to be very good also.
Origin have a place on Charlotte Road, not far from Ozone.
Attendant on Great Eastern Street used to do a good flat white too!
All of the above are a few minutes walk from each other.
There’s also a great pub called the Old Blue Last just down the street from Attendant although again, at the rate London changes it may not be as good these days!
It’s not the easiest place to get to via public transport from the city - (tube to Stratford then Overground back to Homerton) but Dark Arts Coffee roastery cafe is also usually great. Rosina Street in Homerton.
I don’t miss much about London but the coffee is very much one thing I do! Enjoy!