Hi Hacker News,<p>I’ve reached an age now where I need to start thinking about my retirement, in addition to buying a house, saving for a wedding, starting a family, affording to pay for childcare, amongst other things. Frustratingly, it is really hard to know if I’m saving enough, or even how much I should be aiming to save. The best tools to solve my problem model cash flows and are only available through expensive financial advisors. I’ve built Moneyed to solve my own, and many other people’s, problem.<p>Moneyed, at the core, takes into account personalised financial goals and models cash flows i.e. the growth of assets, savings rates, and spending. Difficulties arise in the details, especially taking into account tax rules, and building a plan that is fully optimised (i.e. one where you minimise the amount you save whilst still being tax efficient and meeting your goals).<p>Moneyed also utilises Open Banking to give a full financial overview (UK current accounts, credit cards, savings, investments, pensions), to understand current spending, and to make it easy to know if you’re on track.<p>The backend of the app is built in Quart, an async version of Flask (Python), and utilises React for the frontend. The site also uses Quart for the backend but uses Svelte for the frontend. I’m the author of Quart, so it is an obvious choice for me. As for the frontend, React works really well for the app given the complexity, but I find it too heavy for the site. Fortunately Svelte exists, which I think is perfect for the site.<p>To build an optimised financial plan, we’re implementing SciPy’s minimize function as it enables us to model both linear and non-linear constraints and is relatively quick to solve (provided the initial first guess is good). We’re planning on leveraging more data science techniques: building a recommender engine to help people decide where to save/invest and cohort analysis to give for social validation and insights.<p>As for our go-to-market, we’re targeting young professionals working in tech as part of their employer’s benefits and wellbeing strategy as this enables us to create a “trigger” to get people thinking about their financial future.