Jumia Technologies AG (NYSE:JMIA) shares are trading higher Tuesday after the company reported strong first-quarter revenue results. The Details: Jumia Technologies reported first-quarter revenue of $49 million, up 19% year-over-year, and gross merchandise value of $181 million, up 5% year-over-year.  Marketplace revenue, comprised of commissions, fulfillment revenue, value added services and marketing and advertising revenue was $25.9 million, up 11% year-over-year, driven by higher commissions and corporate sales, partially offset by the impact of foreign exchange. First-party sales revenue was $22.4 million, up 29% year-over-year, driven by sales of larger ticket items, such as electronics and home and living items, partially ...