Meet Vivid, a new challenger bank launching in Germany that promises low fees and an integrated cashback program. The two co-founders Alexander Emeshev and Artem Yamanov previously worked as executives for Russian bank Tinkoff Bank. Vivid doesn’t try to reinvent the wheels and is building its product on top of well-established players. It relies on solarisBank for the banking infrastructure, a German company with a banking license that provides banking services as APIs to other fintech companies. As for debit cards, Vivid is working with Visa. If you live in…