Konkai no Jinsei wa Maid Rashii

Due to a crime she committed in her past life, Alicia is destined to reincarnate and live unfortunately. Reincarnating again and again, she realizes that doing good deeds will improve the conditions of her next life. To accumulate virtues in her current life, Alicia becomes a hardworking maid at a castle. Inventing things with the knowledge she commands from her past life to solve problems throughout the castle, she gets approached with a variety of worries?!

(Source: AlphaPolis, translated)