echo-log
Kafka inspired log broker built from raw Java NIO selectors. Append only segment files, offset indexed lookups, a custom binary wire protocol, consumer group rebalancing, and leader follower replication guarded by fencing tokens. Benchmarked against Kafka for throughput.
Java NIO Docker ZooKeeper Prometheus
grabmyseat
High concurrency ticket booking and payments engine. Seven services covering gateway, auth, inventory, wallet, waiting room, saga orchestration, and ticketing. Ordered Redisson locks and atomic Redis reservations stop overselling, FIFO admission permits and a persisted saga absorb flash sale traffic.
Java Spring Boot Redis PostgreSQL
daakdash
Courier and logistics platform built around an auditable parcel state machine with optimistic locking. Gateway secured with JWT validation and Redis backed rate limits, delivery automated with distance based routing and capacity aware partner assignment.
Java Spring Boot PostgreSQL Redis
PulseCast
UPI transaction forecasting for small merchants using TimesFM, a zero shot model from ICML 2024. Festival aware covariates pulled from live holiday APIs, salary day spikes detected dynamically. FastAPI backend, Streamlit dashboard, 256 tests.
Python FastAPI TimesFM PyTorch Streamlit
feedrank
Two stage recommender trained on 54 million Amazon review interactions across 6.1 million users and 1.2 million items. ALS retrieves candidates from a FAISS index, LightGBM re ranks them in 2 to 4 milliseconds. Training data processed with DuckDB over parquet instead of pandas.
Python FastAPI FAISS LightGBM DuckDB
libmicrodns #53 merged mDNS goodbye packet detection per RFC 6762 section 11.3, so callers can tell when a service has actually departed.
FFmpeg #22237 merged H.261 encoder and parser API test, extended yuv4mpegpipe FATE coverage across four pixel formats, hardened file test error paths.
FFmpeg #22693 merged Fixed APV profile selection in liboapvenc so every advertised pixel format actually encodes, plus a buffer leak in the close path.
shap #4362 merged Replaced deepcopy with copy in Explanation's indexing path, cutting unnecessary array duplication, and fixed a missing return that was silently dropping results.
Also mentoring robotics at SRA VJTI, control systems for the Gyroglider aerial platform and the Ballerina Cappucina omnidirectional bot, and teaching 150+ first years. Hacktoberfest 2025 Super Contributor.