LEONARDO YAIBERT - Backend Engineer | ContraWork by LEONARDO YAIBERT
LEONARDO YAIBERT

LEONARDO YAIBERT

modern website developer using React and Node.js

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Cover image for I worked on a WordPress-based
I worked on a WordPress-based real estate platform focused on residential sales, property lettings, and open market transactions. My responsibilities included developing and maintaining custom website features, optimizing performance, and improving the overall user experience across desktop and mobile devices. I implemented property listing functionality, content management enhancements, and responsive UI components to support seamless property browsing and client engagement. I also collaborated on backend customization, plugin integration, and site maintenance to ensure platform reliability, scalability, and smooth day-to-day operations for both administrators and customers.
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Cover image for Smiley Pets is a professional
Smiley Pets is a professional pet care website I designed and built from scratch for a local business established in 2010. The site showcases their dog walking and pet sitting services, highlights their credentials — fully insured, DBS checked, and Canine First Aid certified — and builds trust through client testimonials and a photo gallery of happy pets in their care. Key features include a pet photo film strip, a full gallery, a contact and booking section, and social media integration. Built with Next.js, React, TypeScript and Tailwind CSS, and deployed on Vercel.
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Cover image for I was solely responsible for
I was solely responsible for the architecture and design of the website and mobile app for a predict-to-earn market in polygon network. I led the blockchain and Front-End development teams during the design and planning phases, guiding them through the solution and implementation. After collaborating with the client's security team, I created an optimal cloud infrastructure solution that met their functional and security requirements. I analysed the functionality of the microsite to gather the data requirements and used this to devise the most efficient database schema for PostgreSQL. I also created detailed architecture diagrams and a comprehensive technical design breakdown of the Google Cloud architecture, including justifications and decisions made for each service, along with implementation and configuration steps.
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Cover image for I worked as a full-stack
I worked as a full-stack developer on a SaaS platform designed for actors and talent professionals to manage and showcase their portfolios and demo reels. My primary responsibility was modernizing and scaling the platform’s architecture to improve maintainability, performance, and long-term development efficiency. I led the migration of the frontend application from AngularJS to Angular 10, rebuilding core modules and improving the overall user experience with a more modern and maintainable frontend architecture. On the backend, I migrated services from Firebase Functions (serverless) to a Laravel-based RESTful API system, enabling better scalability, structured business logic, and easier integration with platform services. I developed and maintained multiple platform areas, including actor landing pages, admin dashboards, and super admin panels. These systems allowed administrators to manage users, actor profile updates, subscription plans, payment statuses, and platform operations efficiently. Additionally, I integrated Mux video streaming services to support secure and optimized video delivery for actor demo reels, and implemented Stripe payment integration for subscription and billing management. My work focused on building scalable features, improving platform reliability, and delivering a seamless experience for both administrators and end users.
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