About Me

Principal Software Engineer with deep expertise in building and maintaining SaaS platforms using React, Node.js, and microservices architecture. Proficient in designing RESTful APIs, integrating relational and non-relational databases, and orchestrating robust CI/CD pipelines to ensure code quality and rapid delivery. Adept at delivering scalable, high-performance solutions while leading cross-functional teams to champion best practices and drive innovation. Proven track record of architecting end-to-end systems that prioritize reliability, security, and seamless user experiences.

Let me transform your business vision into a high profitable software. Hacking since 2004.

Thank you for considering my application.

Best Regards,
Dellean Santos


Front-End Development

  • Technologies: HTML5, CSS3, JavaScript (ES5, ES6, ES7)
  • Frameworks & Libraries: React.js (since 2016), Redux, Context API, Apollo, Hooks, Styled Components, CSS Modules, React Testing Library, Webpack
  • Next.js (since 2019): Server-side rendering and performance optimizations
  • UI/UX & SEO: Building user-centric interfaces with a focus on SEO best practices
  • Design Collaboration: Figma

Back-End & Serverless

  • Primary Stack: Node.js (since 2015)
  • Other Languages: Elixir, Python
  • APIs & Architecture: REST, GraphQL, Microservices
  • Serverless Deployments: AWS Lambda, Vercel

Databases

  • Relational: PostgreSQL (preferred), MySQL
  • NoSQL: MongoDB, Xata
  • Experienced in both relational and non-relational data management

Programming Paradigms

  • Functional
  • Reactive
  • Object-Oriented (OOP)

Testing & Quality

  • Testing Tools: Jest, React Testing Library, Cypress (E2E)
  • Test Coverage: Unit, Integration, E2E
  • Emphasis on Clean Code, maintainability, and best practices

Development Techniques & Methodologies

  • SEO, Authentication & Authorization
  • Agile: Scrum, Kanban
  • CI/CD: Jenkins, Drone, GitHub Actions

Custom Node.js Modules

Open-source projects authored:

  • telegram-bot-maker
  • require-camelcase
  • node-image-downloader
  • save-pretty-json
  • use-fetch
  • react-hook-useCep
  • react-samurai-toolkit

Tooling & Infrastructure

  • Containerization: Docker
  • Version Control: Git (GitHub, GitLab, Bitbucket)
  • Cloud Services: AWS, Heroku

Leveraging these technologies and methodologies, I deliver high-quality, scalable, and maintainable solutions that focus on user experience, performance, and rapid iteration.


My Latest Relevants Work Experiences

Caraway Home - 05/2024 ← CURRENT

Role: Senior Software Engineer - React Specialist

I help businesses increase sales and streamline operations by building high-performance e-commerce platforms, seamless API integrations, and intuitive, conversion-focused user experiences.

By combining speed, efficiency, and a user-first approach, I ensure that every solution not only works flawlessly but also drives real business growth.

Ambush Consulting - 03/2022 - 06/2023

Role: Senior Software Engineer - React Specialist

As a Senior Frontend Engineer, I am responsible for spearheading the development of dynamic and responsive user interfaces, high-performance code that engages and delights our users Allocated to an American client, developing internal tools and product return management software for e-commerce and APIS integration.

Quinto Andar - 09/2021 - 04/2022

Role: Senior Software Engineer - React Specialist

As a seasoned Senior Frontend Engineer adept in React, my primary focus is crafting visually impressive and SEO- optimized user interfaces that elevate our web applications' search engine visibility. My role revolves around translating design concepts into efficient code, utilizing my deep understanding of frontend technologies to ensure excellent performance, responsiveness, and user engagement. With a keen eye on SEO principles, I collaborate closely with cross-functional teams, lead technical initiatives, and architect components that not only enhance user experiences but also bolster our applications' search engine rankings.

Visionary Labs Pro - 10/2020 - 09/2021

Role: Senior Software Engineer - Full Stack

I am responsible for driving the technological vision and strategy of the company. My role involves overseeing the development and implementation of cutting-edge technical solutions that align with our business goals. I lead the technology teams, fostering innovation, and ensuring the scalability, security, and efficiency of our systems. With a keen eye on emerging trends, I guide the company's digital transformation, enabling us to stay ahead in a rapidly evolving technological landscape.

Descomplica - 03/2020 - 10/2020

Role: Senior Software Engineer - React Specialist

As a Frontend Developer in a dynamic digital marketing agency, I specialized in creating captivating landing pages and seamless content management system (CMS) integrations. Leveraging my expertise in HTML5, CSS, and JavaScript, I transformed marketing concepts into engaging, visually appealing web experiences that drove customer engagement and conversions. My role involved collaborating closely with marketing teams to bring their creative visions to life, ensuring brand consistency and optimization for search engines. I excelled in crafting user-friendly interfaces that not only met client expectations but also surpassed them, contributing to the agency's success in delivering impactful marketing solutions.

Winnin 03/2016 - 09/2019

Role: Senior Software Engineer - React Specialist

I was the first Frontend engineer hired by the company, responsible for developing and maintaining the entire Product Interface (SAAS), as the oldest employee I had a relevant role in the decision-making process and in hiring all other members of software engineering, management of the team, tasks and alignment with the decisions of the product vision, lectures and guardian of culture.

Aotopo 01/2013 - 03/2016

Role: Senior Frontend Developer

In my role as a Landing Page Developer at a digital marketing agency, my primary focus was creating effective landing pages for sales campaigns. Using my skills in HTML5, CSS, and JavaScript, I designed and developed landing pages that were straightforward, visually appealing, and conversion-driven. My work involved close collaboration with the marketing team to ensure the landing pages aligned with the campaign objectives and resonated with the target audience. I contributed to the agency's success by delivering landing pages that streamlined the user experience and contributed to increased sales and lead generation.

Inbrands 04/2012 - 01/2013

Role: Frontend Developer

As a WordPress Theme Developer, I specialized in crafting versatile and customized WordPress themes. With a keen eye for design and a strong grasp of PHP, HTML, CSS, and JavaScript, I developed themes that enhanced the functionality and aesthetics of WordPress websites. My work involved collaborating closely with clients and designers to translate their unique visions into functional themes that aligned with their branding and user experience goals. I took pride in delivering WordPress themes that empowered website owners with flexibility, scalability, and a distinct online presence.