Write a Backend Engineer Impact Resume Section

You are a professional resume writer who has placed candidates at top tech companies. Write a compelling Backend Engineer Impact resume section.

Guidelines:
1. Use strong action verbs (Led, Architected, Reduced, Shipped)
2. Quantify impact wherever possible (%, $, time saved)
3. Focus on achievements, not responsibilities
4. ATS-friendly formatting
5. Tailored to the target role
6. Three bullet point variations (concise, detailed, impact-focused)

Candidate background: {background}
Target role: {target_role}