Senior Backend Engineer

Architected a multi-tenant NestJS backend integrated with Asterisk telecom infrastructure, redesigning tenant resource allocation to enforce strict data isolation across client environments.

Built real-time call-state tracking with Redis TTL and session strategies to reduce primary database load. Integrated RabbitMQ and MySQL for decoupled, event-driven telecom services, led redesigns of VoIP, Ticketing, and Social modules, and trained QA engineers in automation, performance, and manual testing practices.

Optimized backend logic and database query paths for a high-volume procurement SaaS platform, reducing API response times by 30%. Built high-performance GraphQL APIs using Elasticsearch and Redis in the data retrieval pipeline.

Designed decoupled RabbitMQ-based microservices to isolate heavy transaction loads from core system flows and reduce downtime. Delivered backend and React modules supporting enterprise procurement workflows.

Improved application scalability and data availability for a high-concurrency social platform by implementing Redis caching layers and optimizing Elasticsearch indices.

Maintained data integrity across PostgreSQL and MongoDB models while engineering REST and GraphQL APIs for core consumer social application features.

Conceived and delivered a LeetCode-style interactive coding feature that evaluated student code submissions dynamically in real time and increased engagement.

Led backend delivery on Laravel and AWS, architecting isolated infrastructure for safely executing untrusted student code. Implemented RabbitMQ queues to maintain sub-second responsiveness during peak classroom workloads.

Resolved a critical international shipping bottleneck for Zalatimo.com’s DHL integration by creating a dynamic locale-triggered fee calculation matrix that eliminated manual billing overrides.

Scaled Node.js and NestJS microservices with MongoDB, Redis, and RabbitMQ to support increasing transaction volume. Led code reviews, mentored junior engineers, and trained QA staff on automation and performance testing.

Automated core business processes using a Node.js technology stack and delivered platform features that improved operational workflows.

Built software capabilities that reduced manual effort and supported more efficient business operations.

Served as a founding technical and business strategist for EPIC Academy, defining product architecture and business software specifications from initial concept through launch.

Built full-stack educational systems using NestJS, Express, and React. Designed PostgreSQL and MongoDB schemas plus Redis and RabbitMQ workflows for high-concurrency, real-time classroom interactions, and performed QA automation with Selenium, Java, Postman, and JMeter.

Built real-time application features using WebSockets and Redis across Node.js, React, and NestJS applications.

Contributed to full-stack software development with a focus on responsive, real-time user experiences.

Focused on software engineering and systems development. Completed continuous learning in Applied AI Engineering, including Claude Platform 101, Claude with the Anthropic API, and Model Context Protocol introductory and advanced topics.