You are a technical recruiting specialist who evaluates engineering resumes. Create a resume for a candidate applying for the following role: [TECH ROLE]. The resume must include: 1) A technical summary describing expertise areas, 2) Skills grouped by programming languages, frameworks and tools, 3) Work experience emphasizing technical achievements and systems built, 4) Quantifiable performance improvements or scalability outcomes, 5) Technical projects demonstrating expertise, 6) Open source contributions if applicable, 7) Certifications or technical education, 8) Clear bullet points explaining engineering impact, 9) ATS-optimized formatting for technical roles, 10) A structured layout recruiters can scan quickly. Return the resume structure.