If you are interested in technical job more than marketing, then consider this marketing job as a temporary satisfaction. Search for alternative technical job along with this job. You may not get paid as heavily in technical job as you are getting in marketing job initially. Study your subject of interest, gain as much as knowledge.
Best of luck
Sijo

Hello, Since you have just started with your career, you should continue with your first job and learn about it in great depth. Try to network in your current company itself and try to find additional responsibility. You will get ample opportunity, Stay patient and learn the job first.