As a Robo-Advisor Developer at Mandiri Sekuritas, I had the opportunity to lead the end-to-end development of one of the few robo-advisor platforms in Indonesia, despite being an intern. Using Markowitz’s model and extending it with advanced algorithms (including Black-Litterman), I optimized personalized investment strategies and incorporated transaction fees into the algorithm. I independently built the back-end framework, achieving results that outperformed market benchmarks. The project has the potential to generate $150,000 annually, scaling up to 300,000 clients, and is positioned for further growth aligned with the company's strategies. Additionally, I managed a team of interns, overseeing UX design, presentations, and analysis, saving significant outsourcing costs. The platform is now in its final stages, with a potential launch on the horizon.