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JL JobLabs

UK Recruitment Glossary

Tech Stack

Alex By Alex · 12-year UK recruiter · Updated April 2026

In recruiter context

Stack-matching is brutal in technical hiring. A Java engineer applying to a Python role will lose to a Python engineer of similar level, almost every time, because the cost of retraining is real. If you want to switch stacks, build something tangible in the new stack first — a side project, a course completion, a contribution. Stack matters more than years experience for the first round of filtering.

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