Nils Petersen has completed a permanent transfer to Werder Bremen on a four-year contract for an undisclosed fee.
The striker, who had been on loan from Bayern Munich, scored 11 goals in the Bundesliga last season and was delighted to secure a long-term deal with the side.
"This is the news I've been waiting for, now I am very happy that everything turned out the way I liked it.," he told the club's website.
"I am highly motivated for the new season. I want to help so we again make a big step forward."
Petersen first caught the eye after scoring 35 goals in 56 league games for Energie Cottbus before Bayern came calling.
The German found opportunities limited with the Bavarians, making just nine Bundesliga appearances in 2011.
This led to a loan spell to Werder, who have been impressed with his contribution since his arrival.
"We are very pleased that Nils will spend the coming years with Werder, hunting for goals," said club chief executive Thomas Gauge.
"He has shown in the past season he fits perfectly here. We are sure he still has huge potential and will develop, and will continue to be a strong pillar of the team."
Parkinson, assistant Steve Parkin and fitness coach Nick Allamby all put pen to paper on new three-year contracts on Wednesday before the club's open-top bus parade in celebration of a memorable season.
The Bantams secured their first promotion in 14 years after Saturday's League Two play-off final win over Northampton, three months after becoming the first club from the bottom tier of English football to reach a major cup final at Wembley in the Capital One Cup.
Parkinson told the crowd that gathered in Bradford's city centre: "I'd like to thank all the supporters.
"Not just for coming out in your numbers here, but for the whole season. You have been absolutely outstanding.
"That goes for not just during the times when we have been doing well either. Your support when we have found ourselves a goal down has been as important.
"That makes a massive impact and you have played a big part in this season.
"When myself and Steve Parkin first came here to the club, we were looking to start a journey. The good news is we're only at the start of it, so we'll see you all next season."
