LONDON — Deutsche Bank said on Thursday that it would eliminate 1,000 full-time positions in Germany as part of job cuts the embattled lender first announced last year.

The announcement comes with Deutsche Bank facing a series of challenges. Its shares have plunged more than 50 percent in the last year over concerns about the pace of attempts to turn business around after a run of poor financial results and a failing grade in a banking stress test in June.

More recently, investors have fretted over whether the bank, Germany’s largest, will be forced to pay billions of dollars in fines in connection with an investigation by the United States Department of Justice into residential mortgage-backed securities underwritten by the bank.

Deutsche, which is based in Frankfurt, said it had reached an agreement with employee representatives to cut 1,000 jobs in Germany, on top of 3,000 cuts agreed to in June.