An interesting field you may want to check out is prototyping physical custom assistive devices for disabled / differently-abled people.

Examples: 3D printed bookmark with a "line slot" to allow people with dyslexia to read without distractions, customized wheelchair / scooters for kids (since they are smaller, its hard to find the right size for them as they grow), to prosthetic legs and more.

A plan would be to do a search for "makerspaces in (CITY)", find the one with the best reviews and take a tour. You're guaranteed to meet interesting creative people. Makerspaces always need tech/coders (from setting up apps, to programming robots, to community infra like setting up Discourse servers, helping makerspace entrepreneurs setup an ecommerce site, etc).

Best of luck!