Projects

A developer social platform with posts, comments, voting, bookmarks, and categorized feeds.

• Built using Clean Architecture and CQRS via the Mediator library.
• Implemented real-time notifications using SignalR with an in-memory message queue for asynchronous processing.
• Implemented end-to-end observability using OpenTelemetry, collecting distributed traces and metrics, exposing them to Prometheus, and visualizing request throughput, latency, and error rates through Grafana dashboards.
• Used Redis caching with event-driven cache invalidation to keep data fresh and responsive.
• Integrated Serilog logging with Elasticsearch and Kibana for log analytics and diagnostics.
• Used cursor-based pagination for efficient large dataset retrieval over offset pagination.
• Deployed to Azure using GitHub Actions CI/CD pipelines.

A Redis-backed distributed rate limiter in Go supporting Token Bucket and Sliding Window Counter algorithms.

• Implemented Token Bucket and Sliding Window Counter algorithms via atomic Lua scripts.
• Designed dual-mode architecture: transparent reverse proxy and standalone check API, allowing drop-in integration with any stack.
• Implemented per-route configuration with fail-open/closed resilience policy for Redis outages.
• Instrumented full observability pipeline using OpenTelemetry for distributed tracing, Prometheus for metrics, and Grafana for dashboards.
• Shipped production Kubernetes manifests using Kustomize to deploy the full stack (Limitry, Redis, OTel Collector, Jaeger, Prometheus, Grafana) into a dedicated namespace with a single command.
• Load-tested with k6 across smoke, load, and spike scenarios (180K+ total requests, p95 latency under 6ms for Check API and 35ms for Proxy mode, 0% error rate at 100 concurrent users).

A Discord-style collaboration platform with messaging, notifications, video rooms, and real-time presence.

• Designed as a 6-module modular monolith with clean architecture.
• Implemented OAuth2/OIDC authentication with Keycloak and JWT.
• Applied CQRS read/write separation and Redis caching.
• Used PostgreSQL schema-per-module design with Flyway migrations and indexing.
• Deployed with Docker on AWS EC2 behind Nginx with SSL.
• Built CI/CD pipelines using GitHub Actions.
• Added optimistic locking, event sourcing, attachment handling, and invite systems.
• Wrote unit tests using JUnit 5 and Mockito.