Hey! I'm Hassan Mohammed.

Auditable enterprise RAG assistant with hybrid semantic and lexical retrieval across PDF, Markdown, text, JSON, and CSV sources. Every answer includes ranked citations and source excerpts, while signed, single-use approval gates protect write actions. A deterministic 55-case evaluation reached 94% Recall@5 and 100% irrelevant-query rejection, backed by 92%+ backend coverage.

• Python
• FastAPI
• React
• TypeScript
• PostgreSQL
• pgpgvector
• OpenAI
• Docker

Read-only-first Kubernetes and Terraform policy scanner that validates manifests, rendered Helm charts, live clusters, and plan JSON. OPA/Rego and Python checks achieved 100% precision and recall across seeded fixtures, backed by 153 unit tests, 12 live kind tests, and 86.76% coverage. Six constrained MCP tools expose safe infrastructure inspection, while schema checks, policy deltas, server-side dry-runs, and exact-name human approval guard remediation.

• Python
• Kubernetes
• Terraform
• Helm
• OPOPA/Rego
• MCP
• GitHub Actions

GPU-accelerated scientific computing engine in Rust that runs particle dynamics, exact all-pairs N-body, and 2D heat diffusion on scalar CPU, Rayon, and wgpu/WGSL (Metal) backends. Every benchmark row is validated against a scalar CPU reference (max absolute error under 5e-7) before it is timed. A reproducible harness records GPU timestamp queries, shuffled run order, and bootstrap confidence intervals, and a compare CLI flags regressions across repeated runs. Backed by 136 tests and an interactive viewer that renders straight from GPU buffers.

• Rust
• wgpu
• WGSL
• Metal
• Rayon
• GitHub Actions

Hyperlocal commerce platform (~70k LOC) with 50+ REST APIs, PostGIS proximity search, Celery + Redis bulk ingestion with AI-assisted mapping, and a 921-test CI pipeline that builds the Android APK and deploys Dockerized production.

• Django
• React Native
• Redis
• Celery
• Docker
• PostgreSQL
• OpenAI

Real-time payments fraud detection pipeline: PySpark Structured Streaming over a bronze/silver/gold Delta Lake medallion architecture, delivering fraud signals end to end in under 60 seconds with exactly-once processing. A confluent-kafka producer with LZ4 compression and card-keyed partitioning sustains 1K–50K transactions/minute with zero message loss, verified via Prometheus and Grafana. A composite velocity / z-score / geo-anomaly scoring model surfaced 261 fraud alerts across 50K transactions on Databricks, publishing to a downstream Kafka topic in real time.

• Kafka
• PySpark
• DeDelta Lake
• Python
• Docker
• Databricks
• PrPrometheus
• Grafana

Change-data-capture pipeline that mirrors PostgreSQL into Delta Lake through Debezium, Kafka, and PySpark Structured Streaming. LSN-guarded merges preserved exactly-once-style correctness across 804 changes during a SIGKILL recovery drill, with live schema evolution, zero downtime, and an 11-case CI test suite.

• DeDebezium
• Kafka
• PySpark
• DeDelta Lake
• PostgreSQL
• Python
• Docker
• GitHub Actions

Real-time fire detection and classification on Raspberry Pi: servo scanning, YOLOv8 trained on a Roboflow dataset, and voice-guided safety cues over a speaker.

• Python
• YOLOv8
• Raspberry Pi
• OpenCV

natHACKS 2024 rehabilitation track: real-time focus signals from EEG (BioAmp EXG Pill + Arduino) into an Electron shell, with adaptive content skipping on heavy sites when focus drops.

• Arduino
• Electron
• Node.js

Federated social platform inspired by ActivityPub: React + Vite frontend, Django REST API, Dockerized and deployed on Cybera cloud infrastructure.

• React
• Django
• PostgreSQL
• Docker
• Vite

Native-code compiler for the Gazprea language in C++. An ANTLR 4.13.2 grammar generates the lexer and parser, followed by a typed AST, semantic analysis, multi-dialect MLIR generation, LLVM lowering and the LLVM -O2 pipeline, producing native executables linked against a custom runtime. Supports tuples, scoped type aliases, compile-time globals, and procedures with by-reference parameters and aliasing checks, verified by 240 executable test programs.

• C++
• ANANTLR
• MLIR
• LLVM
• CMake

Multi-tenant learning platform for 150+ users with RBAC and media on AWS S3 for a stateless app tier.

• React
• Node.js
• AWS

Android event management app (team of 6): create events, registrations, and attendee workflows end to end.

• Java
• Firebase
• Android Studio