As a seasoned fullstack developer with hands-on experience in numerous languages and frameworks, I believe I am the right fit for your crypto wallet project. I have a comprehensive understanding of Java and extensive expertise in app development on the Heroku platform, which aligns perfectly with your language and platform requirements. In addition, my competence in database management on AWS aligns directly with your needs for DB side integration.
But what truly sets me apart is my familiarity with blockchain technologies and emphasis on security. As a fullstack developer, I've successfully executed similar projects like yours that involved Cryptocurrency systems. My proficiency in Ethereum and Blockchain make me well-equipped to handle the intricacies of your custodial crypto wallet app.
With me on board, you'll not only receive an impressive design document but also an articulate system architecture that ensures high-levels of accuracy, solid structure and uncompromising security protocols. I look forward to leveraging my skills and offering you tailored solutions that will exceed your expectations.