As a seasoned Full-Stack developer, I bring over 15 years of expertise building web and mobile applications with a focus on cryptocurrencies. I specialize in frontend technologies like JavaScript frameworks - AngularJS, React, and Vue.js, which allows me to leverage the blockchain technology required for this project. My proficiency extends to backend tech including PHP and NodeJS, making me highly capable of creating a program that addresses your unique needs for flashing and temporary holdings for various cryptocurrencies.
Furthermore, my experience isn't just limited to coding; I have in-depth understanding of security measures vital to safeguarding cryptocurrencies. This gives me an edge in ensuring safe temporary holdings for the flashed coins. Additionally, my fluidity with both Android and PC devices aligns perfectly with your requirement for cross-device compatibility.
Lastly, my professional work ethic is marked by consistent daily communication to provide quick updates and address any queries effectively. I value trust and understand the importance of proof - rest assured, I am more than prepared to meet your need for sample coins before the job is awarded. When you hire me, you're getting guaranteed work completed on time, ongoing support as required, and most importantly - a dedicated professional who delivers-results