A Jobcentre in Clapham is advertising for a £10-an-hour webcam performer to act out customers' fantasies by talking dirty and stripping off online.
The centre in Clapham Common advertised the position last week, stating the job "may cause embarrassment to some people".
The duties listed in the job description included "explicit sexual dialogue" and "performing to webcam for clients' and customers' fantasies".
The advert also stated the successful applicant could claim tax credits to top up what they earned performing as a webcam stripper.
Women were told the hours were flexible and they could work between 15 and 40 hours a week.
Sharon Ebbs, 38, of Clapham, said she was horrified when she saw the advert.
Mrs Ebbs said: "If they think I'm going back into work after having two children only to strip off and talk dirty to a bunch of dirty old men all over the world they are very much mistaken.
"I cannot believe they think this a suitable job to advertise in Jobcentre."
A spokesman for the Department for Work and Pensions said its Jobcentres had a duty to advertise any legal job.
Cybertrader, the company advertising the job, was unavailable for comment.
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