No Need For a Global Summary (Don't Have a Summary/Objective Section)

The vast majority of summary/objective sections are too similar to provide any additional value. They often sound generic:

"Mid-level software engineer with experience in this backend language and this frontend language, and this database. I have 5-25 years of experience. I'm passionate and I'm looking for a new challenge!"

All of that can be gleamed from the rest of your resume and simply takes up space that you could be using to express relevancy and why you're what they're looking for. You can demonstrate this in your job descriptions and the skills section.

The only exception to this is if it's hard to tell from your experience what your actual strengths are. You may have been hired in as a frontend guy but ended up working a lot on the database. Your last title was still "Frontend Engineer", but you are seeking more full-stack roles.

In this case, it makes sense to have a very brief objective section that uses the title you believe your skills are closest to: "I am a full-stack engineer with 2 years of in React.js and Django experience."