Leonardo Reis Email & Phone Number

Brazil

Leading the development of a financial SaaS platform specializing in contractor management (PJ) and unified payments.Selected Achievements:- Server-Side Performance: Used Next.js 14 (Server Components, caching) to improve load times and UX.- Microservices Architecture: Used Node.js/Nest.js features to establish a separation of responsibilities among APIs- Custom Digital Signature: Built an in-house solution, cutting third-party API costs.- UI/UX Enhancements: Integrated PandaCSS, Radix, ArkUI, react-currency-mask and react hook form for accessibility, improved currency input, and form handling.Key Technologies: React.js, Next.js (v14), Node.js, Nest.js, PostgreSQL, PandaCSS, Radix UI, ArkUI, React Hook Form, OpenAI APIsKey Strengths: Business-driven Development, Cross-functional Collaboration, Performance Optimization, Accessibility Compliance

Internal application hub to manage and control permissions across other integrated applications.Selected Achievements:- Reusable Filtering Component: Created an advanced, reusable filtering component using React Hook Form with URL state, improving data sharing and saving capabilities for end users.- Large-Scale Data Integration: Led the integration of extensive data imports and exports from external clients and databases using cron jobs and webhooks, enabling smooth handling of large data volumes.- Close Collaboration with Designers: Worked closely with design teams to ensure usability and visual alignment, proactively suggesting improvements to enhance the user experience based on feedback.Key technologies: Next.js 14, React.js, Nest.js, Node.js, React Hook Form, PandaCSS.

Lead Senior Developer – HubMe, a platform designed for marketing agencies to find and hire freelance professionals, supporting negotiations and in-platform payments. Freelancers can also request payouts directly through the platform.Selected Achievements:- Architected reusable components to facilitate scalability and maintenance.- Led migration to Next.js 14, boosting performance and supporting AI integration.- Served as a primary client contact, ensuring clear communication and timely resolution of issues.- Optimized frontend architecture, reducing project delays by 50% and resolving key integration issues.- Actively participated in product discovery and strategic discussions, ensuring technical solutions add business value and improve user experience.Key strengths: Deep product alignment, proactive client communication, and collaborative problem-solving.Key technologies: React.js, Next.js, Node.js, Nest.js, AI integrations, Postgres, React Hook Form

Senior Developer – CRM Platform, a system focused on tracking and managing field workers at sales points, overseeing task assignments, scheduling, and data collection through detailed map-based monitoring. From journey planning to visit tracking and comprehensive worker management, this platform facilitates enhanced oversight.Selected Achievements:- Refactored key modules, including the Google Maps API integration in the visit control page, improving performance, code clarity, and reducing bug reports.- Designed a drag-and-drop weekly route planner, enhancing visibility and replacing traditional selectors.- Built a custom Excel library for complex templates, improving user workflows.- Actively engaged in product discovery and definition, sharing valuable technical and product-driven feedback to align solutions with business needs.Key strengths: Product engagement, strategic thinking, client communication, and product vision.Key technologies: React.js, Node.js, Nest.js, Google Maps API, Excel library development

Frontend Developer – Ambev Tech (1-month contract)- Increased test coverage by over 30% within one month by developing unit tests for legacy React components, hooks, and functions using React Testing Library, Jest, and React Hooks Testing Library. ##Senior Software Engineer – Interstar, a billing system that manages tariffs, accounts receivable, invoices, and related integrations through CNAE.- Led a team in project organization, code reviews, and cross-functional communication with PO, client, and infrastructure teams, utilizing React.js, Chakra UI, Node.js, microservices, and libraries like React Hook Form to enhance product alignment and team efficiency.Key Technologies: React.js, Chakra UI, Node.js, Microservices, React Hook FormKey Strengths: Team leadership, product-oriented mindset, proactive collaboration with product and infrastructure

Monte Belo, Minas Gerais

Full Stack Software Engineer – BrasilCard Digital, a digital banking platform focused on innovative financial solutions, including real-time payment systems and simplified transaction processing.Selected Achievements:- Led the development of the Pix module, integrating the SPI, DICT, and INIT functionalities to enhance real-time payment capabilities.- Contributed to the digital bank's back office, optimizing workflow and improving efficiency through effective React.js/Node.js solutions.- Created the react-currency-mask library to simplify currency input handling, improving user experience and transaction accuracy.- Progressed from intern to mid-level developer, demonstrating extensive knowledge of internal systems and making impactful contributions to key projects.Key Technologies: TypeScript, JavaScript, Express.js, Node.js, Nest.js, Docker, RESTful APIs, RabbitMQ, PostgreSQLKey Strengths: Full Stack Development, Payment Systems Integration, Workflow Optimization, Library Development

Monte Belo, Minas Gerais

Frontend Developer – Agil, a personal loan management platform specializing in credit analysis and efficient loan processing.- Developed user-friendly interfaces, enhancing the overall user experience for loan management functionalities.- Optimized data analysis processes, reducing personal loan system data analysis times by approximately 85% through integration optimizations.- Collaborated with cross-functional teams to ensure seamless integration of frontend components with backend services and databases.- Employed TypeScript and SQL (PostgreSQL and SQL Server) to maintain code quality and support data-driven features.- Utilized Docker for consistent development environments and improved deployment processes.Key Technologies: TypeScript, JavaScript, Next.js, React, SQL (PostgreSQL, SQL Server), DockerKey Strengths: Frontend Development, User Experience Optimization, Data Integration, Cross-functional Collaboration