● Developed settings page so that users could edit contact information using Elixir, Phoenix, JavaScript, React, and   PostgreSQL, improving user satisfaction and making the app more robust.● Refactored important table from Elixir template to expand functionality by 2X, including adding a data drawer and   sort/filter capabilities using JavaScript, React, and PostgreSQL, making it substantially easier for users to edit data.● Created mailing list on marketing page using JavaScript, Elixir, Phoenix, and HTML, enabling head of sales to reach   out to people interested in our product and easily keep them in the loop about updates.● Improved automated internal Slack notifications using Elixir, Phoenix, and PostgreSQL, allowing for tracking of app   performance and important metrics on a daily basis.● Constructed worker to change appointment status at the correct time, accounting for reschedules using Elixir and   Phoenix, expanding ability to give users metrics on how the app is performing