Dellean Santos

Professional Experience

Software Engineer — Next.js / React Specialist

Led the migration of the company website from Webflow to a modern Next.js, React, and headless CMS architecture.
Designed and implemented API integrations connecting the platform with internal and third-party services.
Improved website architecture, SEO, performance, and maintainability through a modern frontend stack.
Delivered new product features across the frontend and integrated backend APIs.
Contributed to SEO and Answer Engine Optimization (AEO) initiatives that resulted in significant organic traffic growth.

Senior Software Engineer — React Specialist

Developed and maintained e-commerce applications using React, Next.js, JavaScript, TypeScript, and API integrations.
Modernized frontend architecture and implemented conversion-focused user experiences.
Integrated frontend applications with backend services and third-party APIs.
Improved application performance, maintainability, and user experience.
Collaborated with product, design, and engineering teams to deliver production features.

Senior Software Engineer — React Specialist

Developed internal tools and e-commerce product software for a U.S.-based client.
Built responsive frontend applications using React, JavaScript, and modern frontend architecture.
Integrated frontend applications with backend services and REST APIs.
Developed product return management functionality and supporting API integrations.
Collaborated with distributed engineering and product teams in an international environment.

Senior Software Engineer — React Specialist

Built and maintained production web applications using React, Next.js, JavaScript, and TypeScript.
Developed SEO-focused interfaces with emphasis on web performance and search engine visibility.
Architected reusable frontend components and application features.
Collaborated with cross-functional teams on technical initiatives and product development.
Applied frontend performance optimization and modern web development practices.

Senior Software Engineer — Full Stack

Designed and delivered multiple production-ready SaaS products from architecture through deployment and production launch.
Built a tax calculation SaaS using Next.js, Node.js, and PostgreSQL, deployed on Vercel, with Stripe payment integration.
Built a scheduling SaaS for barbershops, nail salons, beauty professionals, and other appointment-based businesses using Next.js, Node.js, and PostgreSQL.
Integrated the scheduling platform with the Meta API to automate appointment reminders through WhatsApp.
Implemented subscription and payment workflows using Stripe.
Designed database schemas, backend APIs, frontend applications, authentication flows, and third-party integrations.
Delivered multiple high-conversion sales landing pages, focusing on SEO, performance, responsive design, and conversion optimization.
Owned the full development lifecycle, from product requirements and technical architecture to deployment and production maintenance.

Senior Software Engineer — React Specialist

Developed high-performance landing pages and web applications using React, JavaScript, HTML5, and CSS3.
Integrated applications with content management systems and external APIs.
Implemented SEO and web performance optimizations.
Collaborated with marketing and design teams to translate product and campaign requirements into production software.

Senior Software Engineer — React Specialist

Served as the first frontend engineer and helped build the company’s SaaS product interface.
Developed and maintained the primary product frontend using React and modern JavaScript.
Participated in architectural and technical decisions as the engineering organization grew.
Contributed to hiring, technical leadership, engineering processes, and team development.
Worked closely with product leadership to translate product requirements into scalable software.

Senior Frontend Developer

Developed production websites and conversion-focused landing pages using HTML5, CSS3, and JavaScript.
Built reusable frontend components and campaign landing pages.
Collaborated with marketing and design teams to implement digital experiences.
Optimized websites for usability, performance, and search engine visibility.

Frontend Developer

Frontend Developer