J
José Paulo Oliveira Filho
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São Paulo, State of São Paulo, Brazil
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Jobs
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Mid Software DeveloperStefaniniMay 2025 - Current (1 year 3 months)Serve as a Fullstack Mobile Developer at Stefanini, delivering complete solutions with a focus on performance, usability, and scalability. Develop and maintain cross-platform mobile applications using Flutter and Dart, focusing on intuitive and responsive interfaces. Implement and maintain scalable RESTful APIs using Laravel (PHP), following clean code principles, SOLID practices, and security best practices. Design and model relational databases with PostgreSQL, applying optimizations and ensuring data integrity and consistency. Participate actively in the full development cycle from requirement gathering to deployment and production maintenance. Version code in an organized and collaborative manner using Git, maintaining clean repositorie- Software EngineerTK ElevatorApr 2023 - Apr 2024 (1 year 1 month)Charted a successful course for mobile development leveraging expertise in Microsoft technologies such as C# Xamarin and MAUI. Engineered key features for TK Elevator's flagship mobile app using C# MAUI, contributing to a product used by field technicians across multiple countries to manage elevator service workflows. Fixed, documented, and reported on bugs to product managers and customers.
- DFrontend Mobile DeveloperDRAGON VCNov 2021 - Apr 2023 (1 year 6 months)Developed and shipped features across 3+ mobile applications using C# Xamarin and Flutter, collaborating with a distributed team to deliver bi-weekly sprint releases. Integrated Agile Development (Scrum) into the coordination of daily, weekly and monthly meetings to report on development results. Worked as a team as well as independently to critically analyze problems and complete assigned tasks. Documented and reported on key project progress milestones to ensure alignment with goals.
- WFullstack Web DeveloperWEBSULFeb 2019 - Sep 2019 (8 months)Working on the internal company software, orchestrated all aspects of web application planning, development, testing, implementation and maintenance using technologies such as PHP, PostgreSQL, HTML5, CSS, JavaScript and jQuery. Established and oversaw Linux web servers, e.g. Nginx and Apache, as well as shell script written backup routines. Employed exceptional problem-solving abilities to contribute to optimal application development. Tackled critical development issues and made important decisions by building and nurturing positive relationships with team members.
- Software Engineer, Independent ConsultantSolopreneurJul 2018 - Current (8 years 1 month)Full Stack Engineer with 8+ years of experience designing, developing, and deploying web and mobile applications used in production environments. Build scalable backend systems using C#, .NET, Node.js, and PHP (Laravel), applying clean architecture, security best practices, and performance optimization. Develop modern frontend applications using React, Next.js, and JavaScript, focusing on usability, performance, and maintainability. Design and manage relational and NoSQL databases including PostgreSQL, MongoDB, and MySQL. Architect and integrate REST APIs, authentication systems, and third-party services. Deploy and maintain applications using Docker, CI/CD pipelines, and cloud infrastructure such as DigitalOcean and AWS. Develop cross-plat
Education
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- ISystems Analysis and Development TechnologistInstituto Federal do Rio Grande do SulJan 2018 - Dec 2018 (1 year)While completing college degree, mentored several high school students in multiple programming disciplines, guiding them through the use of HTML, CSS, Java, C# and object-oriented programming. Engaged productively as a researcher in a project exploring possible visual computation implementations (object detection and classification) in an embedded device (Raspberry Pi 3) to develop a low-cost smart security camera. Applied strong knowledge and use of libraries in C and Python to facilitate project completion.
Projects (professional or personal)
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- ÓÓtica IntegradaÓtica IntegradaNov 2018 - Current (7 years 9 months)Built and maintained Ótica Integrada, a full-stack optical retail management platform (Laravel, MySQL) that generated $800K in client revenue in FY2023 and supported the client's post-COVID operational recovery. Project success played a key role in the client's post-COVID recovery, providing a robust and scalable solution that revitalized operational efficiency and supported their return to financial stability. Performed essential leadership functions related to delivering a platform that both addressed immediate challenges and enabled sustained growth in a competitive market. Currently working on an enhanced version of the Ótica Integrada project, utilizing the latest Laravel and Livewire versions to introduce improved performance, scalabi
- OPro-Mama AppOsorioApr 2017 - Dec 2018 (1 year 9 months)Developed and published Pro-Mama, a cross-platform maternal health mobile app for Android and iOS using Xamarin, in partnership with IFRS and the Osório Department of Health. Won 1st place at the award ceremony of the Exhibition of Successful Experiences of the 31st COSEMS/RS's Congress. Highlighted at the 8th Exhibition of Teaching, Extension and Research (MoEXP) at category "Extension Technology and Production".