- Wrote feature that saved the company $X millions of dollars.

- Wrote feature that saved the company X hours each time they do this process.

- Wrote feature that served X00,000 customers over the span of Y months.

- Managed X number of people on this project.

Instead of:

- Was responsible for making this software.

- I built this a website with a database.

- I had X, Y, and Z responsibilities at this company.

- I used X, Y, and Z technologies on this project.

Focus on bullets that show real numbers in metrics that companies care about (saving time, money, gaining customers, number of reports), wherever possible.

The others can be useful too, but shouldn't be what you highlight (list of tech doesn't hurt for hitting buzzwords, though).