Ader Marcal
Software Engineer with more than 19 years of experience
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About
Senior Software Engineer with 20+ years of experience building scalable web applications, APIs, and enterprise systems across fintech, healthcare, and SaaS. Strong background in backend architecture, performance optimization, and team leadership. Proven ability to improve system efficiency, lead incident response, and deliver high-impact solutions in Agile environments. Currently strengthening modern stack with Node.js (NestJS) and React.
Experience leveraging LLMs (Claude, CodeRabbit, Augment) to improve development productivity and code quality.
Experience
Senior Full-stack Developer at Mortgage Automator (2021-03 – 2026-02)
Senior Full-stack Developer in fintech environment
- Improved system performance by 20% through SQL query optimization and backend enhancements
- Led POD-0 incident response team, ensuring system stability and business continuity in a fintech environment
- Designed and maintained REST APIs supporting high-volume financial transactions
- Worked with Dockerized environments and CI/CD practices
- Collaborated with cross-functional teams using Agile/SCRUM methodologies
Senior Full-stack Developer at Penguin Formula (2020-11 – 2021-06)
Short term project focused on scalable web applications
- Short term project: Developed scalable web applications using Laravel and REST APIs
- Delivered solutions for international clients in Agile environments
- Contributed to backend architecture and performance improvements
Senior Backend Engineer at Kwanko (2020-08 – 2020-11)
Backend services development and API integration
- Built backend services using PhalconPHP and MySQL
- Integrated APIs and supported frontend applications (Vue.js)
- Worked in multilingual Agile teams
Senior Backend Engineer at Decskill (Client: EDP) (2020-01 – 2020-07)
Short term project focused on REST APIs and microservices
- Short term project: Developed REST APIs connecting microservices and frontend systems
- Used Laravel in a distributed architecture environment
- Participated in Agile SCRUM sprints and system integration
IT Consultant at KCS IT (2019-09 – 2019-12)
Legacy system modernization and Docker implementation
- Short term project: Refactored legacy PHP systems into modern Laravel architecture
- Implemented Docker for improved deployment and scalability
IT Manager / Software Developer at Unimed Health Insurance (2013-01 – 2019-12)
IT department leadership and Business Intelligence solutions
- Led IT department and implemented Business Intelligence solutions (Power BI)
- Reduced financial losses by 30% through data-driven systems
- Developed secure integrations between healthcare systems and web platforms
Founder / Software Developer at AID Softwares Intuitivos (2013-01 – 2019-12)
SaaS platform development and full-stack applications
- Built SaaS platforms used by organizations
- Developed full-stack applications using PHP, MySQL, and AWS (EC2)
- Delivered data visualization and KPI systems for business intelligence
Senior Developer at Various Companies (including Mitsubishi Motors Brazil) (2003-01 – 2013-12)
Enterprise web applications and ERP system integration
- Developed enterprise web applications and internal systems
- Integrated Oracle PeopleSoft ERP systems
- Worked in Agile teams
Education
Bachelor's Degree in Computer Science
Postgraduate Degree in IT Management
