Moises Lopes Ferreira

Calculadora Enem— Educational Platform(2025)

ENEM score calculator and SISU simulation platform for Brazilian students. Helps students simulate their chances of approval in university courses, save courses of interest, and receive updates about their scores and selected courses. Built with TRI (Item Response Theory) calculation systems using R language, Node.js, Nest.js, and Go for high-performance score processing.

Cali— FinTech Platform(2024-2025)

Financial technology platform redefining payment processing in Brazil. Offers card processing, Pix instant payments, Boleto, Bolepix hybrid solution, FX & Transfer services, and payment accounts. Focus on seamless, secure, and innovative financial solutions. Implemented comprehensive Design System resulting in 40% improvement in development speed.

Zeuss— Health & Wellness Platform(2024)

Wellness platform offering personalized health plans for men and women, including body transformation, skin care, hair restoration, and hormone replacement therapy (TRT/HRT). Features US-licensed physicians and licensed pharmacy integration with full refund guarantee.

Savana Equinos— Veterinary Software(2023-2024)

Veterinary software for equine reproduction management. Mobile and web application for veterinarians to manage all stages of equine reproduction, generate reports, and track reproductive indices for animals, farms, and breeding centers. Built with offline-first architecture supporting 10+ developers team.

Stark Bank— Banking Platform(2023)

Banking and financial services platform providing innovative solutions for businesses. Focus on secure, efficient, and modern banking infrastructure.

GP Works— Digital Agency(2022-2023)

Digital agency website showcasing services including web development, SEO optimization, DevOps, cloud servers, and digital design solutions. Features portfolio, services, and client testimonials.

Senior Software Development Engineer at Banco Sofisa S/A(December 2025 - Present)

• Senior software development engineer at one of Brazil's leading financial institutions.
• Working on critical banking systems and financial technology solutions.

Senior Software Engineer at Bernoulli Educação(September 2025 - December 2025)

• Developed ENEM calculator system, responsible for architecture design and execution of back-end and front-end for TRI (Item Response Theory) calculation systems based on R language with Linux containers in Docker using Azure Functions and MongoDB database.
• Addressed significant performance challenges, including activities for score reprocessing and answer sheet correction built in Go (over 60,000 scores reprocessed in 10 minutes).
• Implemented compliance with LGPD & GDPR regulations.
• Managed DevOps & CI/CD pipelines using Azure DevOps, Docker, Linux, and Azure Insights.
• Conducted testing and linting with Jest, Playwright, and Grafana k6 for performance testing.

Tech Lead & Senior Engineer Front-end Developer at CALI(October 2024 - September 2025)

• Led development of scalable, high-performance front-end solutions for financial technology platform.
• Designed and implemented a Design System UI that ensured consistency across multiple products, resulting in a 40% improvement in development speed.
• Specialized in React.js, Next.js (App Router, RSC, SSR/SSG/ISR), TypeScript, and Tailwind CSS.
• Implemented micro-frontend architecture using Webpack Module Federation, Turborepo, and Turbopack.
• Ensured security by design with Better Auth (OAuth/OIDC, RBAC, ABAC), OWASP ASVS compliance, and protections against XSS, CSRF, SSRF, CSPs.
• Managed DevOps & CI/CD with Terraform, Kubernetes, Docker, Prometheus, Grafana, Loki, OpenTelemetry, and Argo CD.
• Maintained compliance with LGPD & GDPR regulations.

Senior Full-Stack Developer at Peak One(February 2024 - November 2024)

• Developed, customized, and maintained market-leading e-commerce platforms, including BigCommerce, Shopify, and 29Next, among other CRM and E-Commerce platforms and integrations.
• Created dynamic and robust solutions using JavaScript and TypeScript.
• Utilized Astro JS Framework for static site generation and server-side rendering, integrating with Storyblok for content management.
• Managed CI/CD pipelines through Netlify, Azure, and GitHub Actions, ensuring seamless deployment and integration.
• Collaborated using Slack and Jira for effective task management and communication across development teams.

Full-Stack Developer / UI & UX Designer at Symphony Agency

• Led the design and implementation of banking API integrations for credit assessment and registration of electricity bill loans.
• Developed user interfaces and facilitated content editing using low-code solutions with Next.js to streamline content management.
• Implemented tracking and analytics solutions, integrating with platforms like Facebook, Mixpanel, and Google Analytics to monitor user interactions and conversions.
• Applied Tailwind CSS for responsive and scalable design systems, improving the overall user experience.
• Collaborated with cross-functional teams to ensure seamless integration of design and development efforts.

Technical Lead | Architect | Full-Stack Developer at Savana Technology

• Led a team of 10 developers in building the Savana app for the 'Animal Health Tech' sector, focusing on mobile and web functionalities.
• Architected and developed offline-first support, notifications, and comprehensive farm and animal management features using React Native and Expo.
• Utilized Python and Django for backend development, ensuring robust and scalable server-side operations.
• Managed data persistence with PostgreSQL and Watermelondb, optimizing data handling and synchronization.
• Oversaw both front-end and back-end development, maintaining legacy applications and integrating new features.

Senior Full-Stack Developer at Selique Tech

• Architected and developed serverless applications, leveraging cloud infrastructure for scalability and efficiency.
• Implemented Docker for containerization, optimizing development workflows and ensuring consistent environment setups.
• Built and maintained web applications using React.js, focusing on performance optimization and user experience improvements.
• Integrated Supabase for backend services, including real-time data management and user authentication.
• Deployed and managed applications on Vercel, streamlining the build and deployment processes with automated workflows.

Senior Front-End Developer | Design System Advocate at Instivo

• Developed a comprehensive Design System for a large ERP application, ensuring consistency across web and mobile platforms.
• Utilized TypeScript and React.js to build scalable and maintainable UI components, improving overall application performance.
• Implemented Tailwind CSS to create a modern, responsive design, enhancing user interaction and visual appeal.
• Collaborated with designers using Figma to produce high-fidelity prototypes and maintain design standards.
• Promoted design system best practices through workshops and documentation, fostering consistency across development teams.