Valter Miguel Mendes

Software Engineer with experience in designing, developing, and maintaining enterprise-grade trading and financial systems, with a strong focus on FIX Protocol integration, Java, and Spring Boot ecosystems. At Fincrest SDVM, I specialize in building and supporting low-latency, high-throughput, and resilient trading platforms, including Order Management Systems (OMS) and market data distribution solutions. I have extensive experience integrating with exchanges, brokers, and liquidity providers using FIX 4.x / FIXT 1.1, ensuring reliable and high-performance connectivity in real-time trading environments. Key Responsibilities & Achievements Designed and implemented scalable trading systems with a focus on performance, reliability, and fault tolerance Developed and supported OMS and market data platforms for real-time trading operations Integrated multiple counterparties via FIX Protocol, ensuring compliance and seamless communication Managed and customized FIX engines (QuickFIX/J) for production environments Handled full FIX session lifecycle, including: Logon / Logout Heartbeat / Test Request Sequence reset and resend logic Implemented and supported key FIX flows: Market Data (W/X) New Order Single (D) Execution Report (8) Diagnosed and resolved critical production issues, including: Sequence mismatches Session drops Message validation errors Optimized systems for low latency and high throughput in mission-critical environments Collaborated with cross-functional teams and external partners for integration and certification

As a Frontend Developer, my role involves designing and implementing user interfaces that deliver seamless, responsive, and visually appealing experiences for web applications. My key responsibilities include: UI Development: Translating design mockups and wireframes into high-quality code using HTML, CSS, and JavaScript frameworks like Vue and Nuxt.js. Building reusable, modular components to ensure consistency and efficiency in the application. Responsive Design: Creating interfaces that are optimized for a wide range of devices and browsers, ensuring accessibility and usability for all users. API Integration: Collaborating with backend developers to integrate Graphql APIs and ensure smooth data flow between the frontend and backend. Performance Optimization: Optimizing web applications by implementing best practices, including lazy loading, code splitting, and asset compression, to enhance speed and scalability. Debugging and Problem-Solving: Troubleshooting and resolving bugs to maintain the application’s stability and user experience. Collaboration: Working closely with designers, product managers, and backend developers to align the user interface with project goals. Participating in code reviews and contributing to team discussions to ensure code quality and consistency. Technology Utilization: Leveraging tools and technologies such as Tailwind CSS, TypeScript, and Git to improve development efficiency and maintainability. Continuous Learning: Staying updated with the latest frontend development trends, tools, and best practices to deliver cutting-edge solutions.

- Payment Integration: Connect and maintain integrations with payment systems like Multicaixa Express, Unitel Money, Afrimoney etc... -Error Handling: Develop effective error management strategies, including clear messaging and retry mechanisms. - User Notifications: Implement real-time notifications to keep users informed about payment statuses. - User-Friendly Design: Focus on creating an intuitive and accessible user interface. - Multi-Language Support: Enable multi-language capabilities to cater to a diverse user base.

-Address and resolve inquiries related to M365 web applications, domain registration, Office installation, and feature utilization. - Handle a variety of ticket requests via chat and phone, ensuring timely and accurate resolution. -Provide excellent customer service and maintain high levels of client satisfaction. -Managed and resolved incoming support requests through phone, email, and in-person interactions. . Assisted in the setup and configuration of new computers and software for employees. Assisted customers via phone, email, and chat, ensuring a high level of satisfaction and quick problem resolution. -Documented and tracked issues using a ticketing system, following up to ensure timely resolution.

Desenvolvi e mantive aplicações full-stack usando React, Node.js e MongoDB. Tempos de carregamento de aplicativos aprimorados em 25% por meio de codificação eficiente e ajuste de desempenho. Colaborou com equipes multifuncionais para integrar APIs de terceiros, aprimorando as funcionalidades do aplicativo.