Contract Software Engineer - DOM Core Firefox/Gecko

Confidential

contract mid tech Competitive market rate
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Your regional contact for this role: Anna Schmidt, theHRkey Munich.

javajavascriptc++

Role summary

Sector
Tech
Seniority
Mid
Working pattern
Contract
Pay
Competitive market rate

Across 219 live mid-level tech roles on theHRkey advertising pay in the last 30 days, the typical salary is around £49,500.

This contract software engineering role improves browser session-history test coverage and code correctness. It suits an experienced browser-engine engineer with strong JavaScript, C++ and debugging skills who is comfortable contributing through public review processes.

At a glance

The role

What you will do

What you will bring

How to apply

This role is advertised on a confidential basis. Applications are made through theHRkey: select “Apply through theHRkey”, add your CV and answer a short set of questions about your experience. Your application is received straight away and we will follow up on next steps.

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Posted 24 Sep 2026 · ref 405801