👋 Hello, I'm

Dellean Santos

Principal Software Engineer

Frontend Specialist • 33 years old • Asunción, Paraguay

I transform business visions into high-performance software solutions. With 12+ years of experience building scalable SaaS platforms, I specialize in React, Node.js, and modern web architectures that drive real business growth.

12+ Years Experience
50+ Projects Delivered
10+ Companies Served
Dellean Santos
React
Node.js
AWS
TypeScript

About Me

Passionate about building exceptional digital experiences

Principal Software Engineer with deep expertise in building and maintaining SaaS platforms using React, Node.js, and microservices architecture.

As a Software Engineer with over 15 years of experience building innovative and scalable web applications, particularly in the e-commerce and SaaS domains. Throughout my career, I’ve specialized in modern JavaScript frameworks like React and Next.js, as well as full-stack development with Node.js, consistently delivering high-performance, user-centric solutions that drive measurable business results.

My journey began in web development roles in Brazil, where I honed my skills crafting intuitive interfaces and collaborating closely with marketing teams to align technology with business goals. As the first frontend developer at Winnin, I played a pivotal role in transforming a startup’s vision into a robust SaaS data analytics platform, leading the frontend architecture and mentoring new developers while helping the company achieve product-market fit over four years.

Later, I joined QuintoAndar and Ambush Consulting at PayPal, where I led teams in architecting scalable SaaS components and e-commerce features, enhancing user experiences, performance, and accessibility. At PayPal, I was instrumental in delivering a complex product—“Happy Returns”—far ahead of schedule, demonstrating my commitment to efficiency and impact. More recently, at Caraway Home, I’ve continued to push the boundaries of e-commerce development, integrating CI/CD pipelines and driving seamless user experiences for high-volume platforms.

My approach blends technical excellence with a strong belief in autonomy, communication, and continuous learning. I thrive in agile, cross-functional teams, where I can align technology with real-world business needs. I’m passionate about using my skills to deliver clean, maintainable code that balances speed and quality, ensuring sustainable growth for both products and teams. Above all, I believe that real value comes from creating solutions that empower people and businesses to thrive.

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Performance Focused

Optimizing applications for speed and scalability

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Team Leadership

Leading cross-functional teams to success

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Innovation

Driving technical innovation and best practices

Technical Expertise

Technologies and tools I use to build amazing products

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Frontend Development

React.js Next.js TypeScript JavaScript (ES6+) Redux Styled Components Webpack React Testing Library Tailwind CSS HTML CSS
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Backend & API

Node.js REST APIs GraphQL Microservices Python Elixir
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Databases

PostgreSQL MongoDB MySQL Xata Supabase Redis
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Cloud & DevOps

AWS Lambda Docker CI/CD GitHub Actions Jenkins Vercel Drone

Relevant Professional Experience

Building impactful solutions across leading companies

Caraway Home

US (Remote)
May 2024 - Present Current

Senior Software Engineer - React Specialist

Engineering high-performance e-commerce platforms and RESTful APIs, enhancing sales and operational efficiency by driving seamless user experiences and integrating robust CI/CD pipelines.

🚀 Built scalable e-commerce features using React and Node.js
📈 Enhanced performance and scalability in agile environment
🔧 Integrated robust CI/CD pipelines for rapid deployment

Ambush Consulting @ PayPal

US (Remote)
Apr 2022 - Jun 2023

Senior Software Engineer - React Specialist

Consultant for PayPal, developed a SaaS product ("Happy Returns") using React, Golang, and REST APIs. Delivered the platform in 4 months, far ahead of the 2-year estimate.

⚡ Delivered complex SaaS platform 20x faster than estimated
🎯 Enhanced customer return experiences for major e-commerce
🏗️ Architected scalable, responsive user interfaces

QuintoAndar

Brazil (Remote)
Sep 2021 - May 2022

Senior Software Engineer - React Specialist

Led development with React, Next.js, and TypeScript for a portal, improving SEO, performance, and accessibility while acting as communication hub between design and engineering teams.

📊 Increased web traffic by 20% through SEO optimization
🤝 Bridged design and engineering teams effectively
⚡ Enhanced application performance and user engagement

Winnin

Brazil (Hybrid)
Mar 2016 - Oct 2019

Frontend Developer

First frontend developer at a startup, built a SaaS data analytics platform using React. Led frontend architecture, mentored developers, and scaled the team, achieving product-market fit over 4 years.

🎯 Achieved product-market fit as founding frontend engineer
👥 Scaled and mentored the development team
🏗️ Architected the entire frontend foundation

Let's Work Together

Ready to build something amazing? Let's connect!

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