Anthony Lewis resigned from his position as vice president and CFO, citing "personal reasons." He will be replaced by Ed Malysz, E-Stamp's vice president and general counsel.
Representatives for the San Mateo, Calif.-based company were not immediately available for comment.
Lewis' departure comes as E-Stamp has struggled of late. The company missed earnings expectations earlier this week when it posted a first-quarter loss of 73 cents per share. According to First Call, the consensus estimate was about 69 cents per share. On the heels of that report, E-Stamp's stock was downgraded from a "strong buy" to a "buy" by Deutsche Banc Alex Brown.
Meanwhile, like other e-commerce shares, E-Stamp's stock has plummeted in recent months, dropping to $4 a share yesterday. The shares are now trading down 91 percent from their 52-week high, set in November.
E-Stamp also announced that Laurie Lindsey and George Hurst will join the company as vice president of engineering and vice president of sales, respectively. Lindsey formerly worked at Compuware, while Hurst worked as a national sales manager for the United States Postal Service.