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I'm Marcos Mollerach, a Full Stack Engineer based in Buenos Aires, Argentina. I design and ship high-performance React and Next.js applications with SSR and scalable Node.js backends (NestJS, Express). I love turning complex requirements into fast, reliable interfaces and APIs, and I collaborate with US and LATAM teams to deliver production-grade software. My experience spans building production Web3 landing pages, dashboards, and internal tools; optimizing rendering and backend performance, migrating legacy Java/JAVA desktop modules to React SPAs, and deploying serverless and cloud-native solutions on AWS and Vercel. I'm comfortable with C#, Java, SQL, AWS, Docker, and modern web stacks, and I'm always eager to learn new tech and improve system design.…I'm Marcos Mollerach, a Full Stack Engineer based in Buenos Aires, Argentina. I design and ship high-performance React and Next.js applications with SSR and scalable Node.js backends (NestJS, Express). I love turning complex requirements into fast, reliable interfaces and APIs, and I collaborate with US and LATAM teams to deliver production-grade software. My experience spans building production Web3 landing pages, dashboards, and internal tools; optimizing rendering and backend performance, migrating legacy Java/JAVA desktop modules to React SPAs, and deploying serverless and cloud-native solutions on AWS and Vercel. I'm comfortable with C#, Java, SQL, AWS, Docker, and modern web stacks, and I'm always eager to learn new tech and improve system design.

Marcos Mollerach

Full Stack Developer, Front-End Developer, Back-End Developer, +2

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I'm Marcos Mollerach, a Full Stack Engineer based in Buenos Aires, Argentina. I design and ship high-performance React and Next.js applications with SSR and scalable Node.js backends (NestJS, Express). I love turning complex requirements into fast, reliable interfaces and APIs, and I collaborate with US and LATAM teams to deliver production-grade software. My experience spans building production Web3 landing pages, dashboards, and internal tools; optimizing rendering and backend performance, migrating legacy Java/JAVA desktop modules to React SPAs, and deploying serverless and cloud-native solutions on AWS and Vercel. I'm comfortable with C#, Java, SQL, AWS, Docker, and modern web stacks, and I'm always eager to learn new tech and improve system design.…I'm Marcos Mollerach, a Full Stack Engineer based in Buenos Aires, Argentina. I design and ship high-performance React and Next.js applications with SSR and scalable Node.js backends (NestJS, Express). I love turning complex requirements into fast, reliable interfaces and APIs, and I collaborate with US and LATAM teams to deliver production-grade software. My experience spans building production Web3 landing pages, dashboards, and internal tools; optimizing rendering and backend performance, migrating legacy Java/JAVA desktop modules to React SPAs, and deploying serverless and cloud-native solutions on AWS and Vercel. I'm comfortable with C#, Java, SQL, AWS, Docker, and modern web stacks, and I'm always eager to learn new tech and improve system design.

Available to hire

I’m Marcos Mollerach, a Full Stack Engineer based in Buenos Aires, Argentina. I design and ship high-performance React and Next.js applications with SSR and scalable Node.js backends (NestJS, Express). I love turning complex requirements into fast, reliable interfaces and APIs, and I collaborate with US and LATAM teams to deliver production-grade software.

My experience spans building production Web3 landing pages, dashboards, and internal tools; optimizing rendering and backend performance, migrating legacy Java/JAVA desktop modules to React SPAs, and deploying serverless and cloud-native solutions on AWS and Vercel. I’m comfortable with C#, Java, SQL, AWS, Docker, and modern web stacks, and I’m always eager to learn new tech and improve system design.

Skills

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Intermediate

Work Experience

Full Stack Developer at Rowship

November 1, 2024 - October 1, 2025

Designed and implemented production Web3 landing pages and an internal dashboard for user management. Built REST API endpoints using Node.js and created scalable, SSR-enabled React and Next.js components, improving rendering speed by 35%.

Frontend Developer at DocuGuardian

September 1, 2024 - November 1, 2024

Integrated frontend features with AWS-backed services and APIs; reduced bundle size by 20% and improved load performance.

Full Stack Developer at UNIGIS Smart Logistics

May 1, 2023 - August 1, 2024

Developed internal logistics tools using React, SQL Server, and ASP.NET MVC (.NET Framework 4.8). Participated in backend API design in C# and Java; migrated modules from a Java desktop app to a React SPA; optimized backend controllers and SQL queries, reducing response times by 30%.