• Develop production features for a real estate platform using TypeScript, Vue/Nuxt, GraphQL, and Node.js, while supporting scalable frontend and backend delivery across multiple repositories. • Design and implement GraphQL-powered frontend and backend features, collaborating closely with engineering leadership and product stakeholders to deliver scalable product improvements. • Resolve production issues across SSR/SSG rendering, hydration mismatches, state synchronization, API integrations, and frontend reactivity to maintain platform stability for several active users. • Designed and implemented responsive Vue/Nuxt user interfaces for production features, with a focus on SSR, hydration, browser compatibility, accessibility, and performance. • Contributed to architecture decisions, production investigations, and technical planning to improve application reliability, maintainability, and scalability. • Leverage AI-assisted development tools, including Claude Code, ChatGPT, and Windsurf, to accelerate implementation, debugging, and refactoring while preserving engineering quality. • Diagnosed complex production issues involving stale frontend state caused by asynchronous GraphQL updates and Vue reactivity, delivering reliable long-term solutions.

• Built, maintained, and modernized enterprise HR, Payroll, Social Security, and Time Management applications using Vue.js, JavaScript, TypeScript, C#, ASP.NET Core, Entity Framework, and SQL Server, delivering production features for dozens of enterprise clients. • Designed responsive, reusable, and accessible UI components with Vue.js, collaborating closely with UI/UX teams to modernize legacy interfaces while preserving business-critical functionality. • Designed and evolved multi-tenant enterprise architecture with tenant-aware authentication, role-based authorization, middleware validation, and dynamic database routing supporting dozens of enterprise clients across isolated data environments. • Built REST APIs and backend services supporting enterprise systems, third-party integrations, customer-facing applications, and asynchronous background processing. • Designed, optimized, and maintained SQL Server databases, Stored Procedures, migration scripts, indexing strategies, and business-critical workflows. • Designed and implemented enterprise dashboard features by building SQL queries, Stored Procedures, REST endpoints, database migrations, and responsive frontend components across HR, Payroll, Social Security, and Time Management modules. • Led the ZKTeco biometric integration platform, building synchronization APIs, background workers, and real-time attendance services deployed across multiple enterprise clients. • Deployed and maintained AWS infrastructure (Lambda, CloudWatch, S3, IAM, Elastic Beanstalk, ALB) supporting highly available enterprise HR and Payroll systems. • Implemented AWS Lambda background services, CloudWatch monitoring, Amazon SQS integration, and real-time notification systems to support long-running payroll, webhook, and batch-processing workflows. • Designed and implemented enterprise webhook integrations using AWS Lambda, SQL Server, and C#, including dynamic payload generation, schema mapping, asynchronous processing, reliable delivery, retry mechanisms, error notification workflows, and production monitoring through Amazon CloudWatch. • Worked with Microsoft Azure App Services and Azure Storage Accounts to deploy applications, manage cloud resources, reports, user assets, and enterprise file storage before the migration to AWS. • Maintained and enhanced ASP.NET MVC and ASP.NET Web Forms applications, implementing authentication flows, password reset workflows, forced password change features, UI/UX improvements, and custom ASP.NET Identity extensions. • Refactored legacy ASP.NET applications into modular, maintainable components, reducing technical debt and improving deployment and development workflows. • Led technical initiatives and collaborated with cross-functional teams during architecture discussions, client integrations, production deployments, incident resolution, and enterprise solution design.

• Design, develop, and maintain Android applications using Kotlin, Java, Firebase, Room, SQLite, and Android SDK. • Publish and maintain production applications on Google Play, including apps with 5,000+ users. • Design application architecture, implement local persistence, authentication, analytics, subscriptions, and cloud synchronization. • Build complete applications from concept to production, including architecture, UI, backend integrations, testing, release management, and post-release support. • Integrate Firebase services including Authentication, Firestore, Analytics, Crashlytics, and Cloud Messaging.