A teenager who goes by the name Pinkie Pie has made $60,000 for hacking into Google for a second time.
Google offers the 'bug bounty' to hackers who can find security problems with its products.
The youngster found holes in the Chrome web browser that were described by Google as 'critical' and called the finding 'another beautiful piece of work', according to VentureBeat.
Google fixed the problem with a software update about 10 hours after the bug was identified.
The competition took place on Tuesday at a conference called Hack in the Box in Kuala Lumpur, Malaysia.
The reverse engineering enthusiast had applied for a job at Google in 2011 but did not hear back from the company.
Google unveiled its Chromium Security Rewards Programme in 2010.
It opened the latest 'Pwnium' contest in August offering a total of $2m in prizes. 'Full exploits' were offered up to $60,000, with 'partial exploits' getting up to $10,000.
The teenager also won $60,000 in the first Pwnium competition in February.
Google is not the only company offering rewards for highlighting system vulnerabilities.
Facebook has a programme which pays users at least $500 to spot holes in its systems.