Leonardo Jose Lopez Mejia

Senior Software Engineer @ Pulumi

About

I’m a Senior Full Stack Engineer with 10+ years of experience building scalable apps, mainly in fintech. I enjoy turning complex ideas into simple, reliable solutions using Node.js, React, and cloud platforms.I focus on building stable systems, improving user experience, and making products faster and more efficient. I also enjoy collaborating with teams, sharing knowledge, and supporting others.Let’s connect.I’m always open to interesting ideas and collaborations 🚀

Country

Mexico

City

Querétaro

Industry

Computer Software

Skill

Teamwork, Code Review, Problem Solving, Leadership, Mentoring, Spring Boot, Kotlin, Java, .NET Framework, C#, REST APIs, Redux, Kubernetes, Linux, Firestore, NoSQL, Agile, Redis, Git, Systems Design

Experience

Senior Software Engineer

Pulumi

2022-6 - 2026-3 · 3 yrs 10 mos

United States

I led the end-to-end development of scalable full-stack systems, mainly focusing on building solid backend architecture and high-performance services while keeping everything reliable and easy to maintain. I built and scaled Node.js microservices handling over a million requests a month, improved frontend delivery speed with React and Next.js, and optimized Firestore to cut latency and costs significantly. I also worked on payments and communication systems using Stripe, Twilio, and SendGrid, reduced downtime with better monitoring and CI/CD, and mentored a small team to boost overall productivity.

Full Stack Engineer

Prismatic

2020-3 - 2022-5 · 2 yrs 3 mos

United States

I've built strong full-stack apps with a focus on backend systems and scalable APIs, making sure everything runs smoothly as usage grows. I boosted API performance by around 40% and improved data consistency and system reliability by refining validation and database design. I also worked closely with teams to ship features faster, while modernizing legacy systems to make them easier to scale and maintain.

Software Engineer

Distillery

2016-7 - 2020-2 · 3 yrs 8 mos

Mexico

I worked on full-stack apps and made them faster, smoother, and easier to scale. I boosted frontend performance, cut down bugs, and helped the system handle way more users as it grew.