Off-the-shelf themes and plugins try to serve everyone, which is why they often ship features you never use and still miss the one you need. A custom theme gives you a design that is truly yours with a fraction of the code. A custom plugin solves a specific problem cleanly, without stacking several generic plugins together.
I build themes with performance and monetization in mind — clean markup, ad-ready layouts, structured data and minimal assets — and plugins that follow WordPress coding standards, use proper hooks, sanitize every input and remain update-safe.