The salary trajectory of a a Java Engineer ranges between locations and employers. The salary starts at £43,441 per year (estimate) and goes up to £89,882 per year (estimate) for the highest level of seniority.
The estimated average salary for a Java Engineer at Diffblue is £45,497 per year or £22 per hour, but some professionals have reported earning up to roughly £81,413 per year (90th percentile). The typical pay range is between £34,648 (25th percentile) and £60,941 (75th percentile) annually. This is based on 2 salaries submitted by Diffblue Java Engineer professionals on Glassdoor, as of Jul 2026.