Andre Vilela

Development and maintenance of internal applications and systems Integration with external APIs and services Data processing and manipulation (XML, databases, etc.) Process optimization to improve performance and efficiency Technical support and bug fixing in legacy systems Continuous improvement and system evolution

Worked on the development and maintenance of business management systems used by retail and commercial clients across Brazil. Contributed to feature development using Delphi and PostgreSQL, optimized data processing workflows that previously took hours to complete, and supported system integrations with external APIs and XML-based fiscal data (SEFAZ). Applied version control with Git and best practices for legacy system evolution.

Independent Full Stack Developer with 2+ years delivering end-to-end web and mobile solutions for 10+ clients across healthcare, food service, and professional services sectors.

I take projects from requirement gathering through deployment and ongoing maintenance, working closely with business owners to solve real operational problems with technology.

Key deliverables across projects:

Built clinic and healthcare management systems, digitizing patient workflows and eliminating paper-based processes — enabling clinics to serve more patients with fewer administrative errors

Developed restaurant and delivery management platforms with order tracking, menu management, and operational dashboards, reducing order errors and improving service speed

Created desktop applications using Electron for offices and service providers, streamlining internal planning, scheduling, and client conversion tracking

Built mobile applications with React Native for client-facing engagement and service booking

Integrated Google Ads and digital marketing tools into client websites, increasing brand visibility and driving measurable growth in leads and sales

Developed and integrated REST APIs connecting internal systems with third-party services

Delivered landing pages and institutional websites optimized for conversion and search visibility

Stack used across projects:

Node.js · React.js · Next.js · NestJS · TypeScript · React Native · Electron · PostgreSQL · MongoDB · REST APIs · AWS · Docker · Git · Google Ads API · Vercel · Netlify