Mircea Alexandru

Sole engineer migrating a billing model from credit-based to minute-based subscriptions, building subscription services and implementing end-to-end Stripe integration (webhooks, idempotency, subscription state) on live customers. Owned LangGraph orchestration for a beta AI assistant, and co-led delivery of a Rust/Tauri desktop app plus an end-to-end transcription and speaker-ID service.

Fixed application stability and bottleneck issues under heavy user loads by re-architecting asynchronous and scheduled tasks using Google Cloud Tasks.

Built and deployed custom Google Chrome extensions from scratch and implemented React dashboards and small applications.

Architected and built a US e-learning platform from scratch as founding tech partner, owning the API layer and scaling it to 100+ schools across multiple school districts. Built reporting, automated notifications, and integrations with external school-management and student-data systems.

Core engineer on DataCamp Talent, building product features and APIs with the team. Implemented a personalized job-newsletter integration that generates per-user job matches and delivers tailored lists via customer.io.

Built and optimized production features for a last-mile delivery platform, focusing on reliable route computation at high concurrency. Diagnosed and fixed a production performance issue by addressing Node.js event-loop blocking caused by route computations with many stops.

Architected a standardized multi-tenant project skeleton with dynamic tenant management and secure credential handling via HashiCorp Vault, and supported delivery of scalable APIs for an enterprise loyalty provider. Co-developed NodeZoo (microservices demo system) and Concorda (open-source user-management solution).

Earned a B.Sc. in Computer Science at the University of Craiova.