I can't as not out there myself, equally you need to factor in cost of living as 40k a year in a city that costs 20k a year to live is worse of than 27k a year in a city that costs 5k to live. Then taxes..... many factors.

Equally, front end and marketing are not my area's.

https://www.glassdoor.co.uk/Salaries/estonia-front-end-devel... may be of some help for you though.