August 2025 — Present
Moneta Market LLC
Full Stack Engineer
- Architected the company's first containerized platform: a six-service Docker Compose stack (two FastAPI microservices, Label Studio, MLflow, Nginx reverse proxy) on AWS EC2, replacing manual deployment with reproducible automation.
- Designed a 25-table PostgreSQL schema on AWS RDS — 24 foreign keys, 34 strategic indexes, an idempotent migration system and soft-delete audit trail — reachable only through an SSH tunnel via an EC2 bastion host.
- Built an event-driven FastAPI webhook service linking Label Studio to S3: atomic database/S3 rollback on any failure, async connection pooling and an in-memory cache with database fallback; wrote the team runbooks for operating it.
- Developed a cross-platform C# desktop app (.NET 10, Avalonia, migrated off Windows-only WPF) for human review of ML-labelled video frames: MVVM architecture, two-pass verification workflow and a sliding-window prefetch cache.
- Implemented least-privilege IAM policies, moved credentials into AWS Secrets Manager and set up the CI pipelines; LocalStack emulates S3 locally so development never touches production credentials. Co-supervised two interns and led them after the lead developer's departure.
- Built the data pipeline's operator tooling — CLIs, idempotent S3-to-PostgreSQL sync, drift audits — and automated model training through GitLab CI on ephemeral AWS GPU instances with MLflow tracking.
- Built an on-device computer-vision pipeline on NVIDIA Jetson Orin Nano that counts and identifies the products a customer takes from a retail cooler: two-stage detection and classification on TensorRT FP16, multi-object tracking at 60 fps and automatic camera recalibration via SIFT homography; designed its evaluation harness (leave-one-day-out validation, pre-registered thresholds, stability tests), which established the frame-rate and image-format requirements for production.
FastAPIDocker ComposeAWS EC2 / RDS / S3PostgreSQLNginxC# · AvaloniaMLflowGitLab CITensorRTNVIDIA JetsonOpenCV