• Orchestrated the modernization of a legacy microservices architecture (Angular, Node.js, MongoDB), focusing on stabilizing the codebase and improving system reliability.
    • Redesigned and restructured the build pipeline using Gulp and Docker, ensuring consistent, reproducible environments across the entire development lifecycle.
    • Validated complex application flows and critical system paths to maintain consistent functionality within a mature, multi-service ecosystem.
    • Authored comprehensive user guides that simplified app functionality, reducing support needs by providing clear instructions for the end-users.
    • Built and deployed a production-grade platform using a modern stack: React/MobX/MUI on the frontend and NestJS/TypeORM/PostgreSQL on the backend, utilizing RabbitMQ for message queuing and Socket.io for real-time data sync.
    • Implemented WebSockets to enable live data updates, ensuring a seamless and responsive user experience in a high-concurrency environment.
    • Developed a complex spatial UI workspace featuring interactive 'post-it' cards, managing the technical intersection of DOM-based navigation and data integrity. Overcame significant performance bottlenecks and race conditions when syncing real-time filter results, and utilized custom logic to connect cross-level elements with dynamic visual connectors.
    • Engineered a sophisticated validation engine to handle intricate business rules, ensuring data integrity across complex application flows.
    • Developed a robust testing suite using Jest, writing targeted unit tests for NestJS controllers and services to validate complex business logic and data transformations.
    • Built and maintained custom export templates using Handlebars, allowing for automated and formatted data reporting.
    • Took ownership of core application modules, proactively refactoring code to improve reusability and ensure the architecture could scale with growing user demands.
    • Collaborated on large-scale data layer transitions, implementing new database schemas and refactoring existing modules to support fundamental shifts in the application's architecture.
    • Mentored and onboarded new developers within an Agile environment, fostering team growth and maintaining high coding standards.
    • Contributed to a high-traffic microservices platform using Angular, Java, and MongoDB, delivering robust features within a fast-paced Agile environment.
    • Maintained a proactive approach to understanding complex business logic, ensuring technical solutions were deeply aligned with end-user needs and the overarching goals of the platform.
    • Managed intricate system states and real-time data synchronization using WebSockets, ensuring seamless performance across a sophisticated user base.
    • Developed and maintained internal NPM packages by extending Ignite UI components, creating a reusable library that ensured UI consistency across the entire ecosystem.
    • Developed the Proof of Concept (POC) for migrating the frontend to Angular 20, spearheading the transition away from deprecated patterns in favor of modern features like Signals and Standalone Components.
    • Contributed to the development of complex features involving ESRI geographic data and PDFTron document processing, focusing on performance and seamless user interactions.
    • Collaborated with support teams to triage client feedback, translating user-reported issues into technical solutions that enhanced the reliability and usability of the platform.
    • Contributed to Java Spring Boot microservices, extending existing architectural designs and managing database migrations to support complex feature requirements while ensuring system scalability.
    • Maintained high technical standards by writing comprehensive unit tests and validating service interactions within a complex, multi-service environment to prevent regressions.
    • Partnered with Product Leads and Designers to translate complex requirements into production-ready solutions and resolve high-priority production issues.
    • Developed specialized Angular widgets within a containerized environment, seamlessly integrated with an Infor ERP system to streamline data interaction and business workflows.
    • Engineered and maintained .NET web services to process and deliver critical business data to frontend consumers.
    • Developed Blazor pages and components to provide high-performance data visualization, bridging the gap between legacy data and modern web interfaces.
    • Utilized Dapper to execute hand-written, optimized MS SQL Server queries, ensuring high-speed data retrieval and mapping for complex business reports.

© 2026 DAVID CIOARA