I have more experience with PHP. My field of expertise is this for three years. But have practiced Node js (more Nest js) at an introductory level and I have no problems working in this field and doing more research also in other back-end languages.I am very interested in studying and researching more about clean coding and solid principles, and to become proficient in the implementation of design patterns, and I have planned and am implementing to accomplish this goal.Flutter is an experience I've gained from implementing small projects and being familiar with the main concepts. If needed, I can dedicate more time and work full time in this field.