Cloud cost anomaly detection on AWS CUR data. Three detectors run in parallel (STL · Isolation Forest · Z-Score), with severity-banded alerts and a Streamlit dashboard.

Benchmarked across 25 random seeds: STL wins overall (F1 ≈ 0.76), Z-Score is a perfect point-spike detector, Isolation Forest sits in between.

Python · scikit-learn · Streamlit · pandas · pytest · CI

Sorting algorithm benchmarking suite: Quick / Heap / Shell / Merge / Radix tested on Random, Partially Sorted, and Reverse Sorted data across sizes from 1K to 500K.

Spring Boot REST API + React/Vite UI for interactive comparison, with line / bar / radar charts and CSV/JSON export.

Java 17 · Spring Boot · Maven · React · Vite · JUnit

5-stage 16-bit MIPS CPU simulator with hazard handling (data forwarding EX-EX and MEM-EX, load-use stall detection, branch flush), plus a Verilog RTL twin and live web visualization of registers, memory, and pipeline state.

Java 17 · Javalin · React · TypeScript · Verilog · Gradle

Used-car marketplace with JWT auth, role-based access (admin / seller / buyer), favorites, in-app messaging, image uploads, and a full Cypress E2E suite. Helmet, rate-limiting, and CORS hardening on the API.

Next.js 14 · Express · MongoDB · Tailwind · Jest · Cypress

AI-powered habit-tracking mobile app. Three-tier architecture: React Native (Expo) client + NestJS API + FastAPI AI engine, all backed by PostgreSQL.

React Native · Expo · NestJS · FastAPI · PostgreSQL

Personal portfolio with a 3D Spline robot scene that tracks the cursor across the page, bilingual TR/EN content, EmailJS contact form, and Framer Motion animations.

Next.js 15 · React 19 · Spline · shadcn/ui · Framer Motion

Multi-tenant, AI-powered knowledge SaaS. Teams upload documents and chat with an assistant that answers only from those documents, with citations (RAG). Go core for tenancy/billing/metering, a FastAPI LLM + embedding pipeline, a Next.js front-end, Postgres + pgvector, and a provider-agnostic model layer, with a live demo and CI/CD/CodeQL.

Go · FastAPI · Next.js · Postgres + pgvector · Ollama/Gemini

_{My contribution: the web Vitest suite + CI step.}

A blockchain written from scratch in Go: proof of work, a signed UTXO transaction model, ECDSA wallets, BoltDB persistence, and TCP peer-to-peer sync. Built to a production standard: property-based and fuzz tests, a security-reviewed network layer, and static analysis.

Go · Proof of Work · ECDSA · BoltDB · P2P

_{My contribution: the cmd CLI test suite.}

Kubernetes chaos / resilience harness in Go. Inject controlled faults into a system on Kubernetes, check a steady-state hypothesis, measure recovery, and report a deterministic pass/fail, with an ML-based anomaly layer over accumulated runs.

Go · Kubernetes · Chaos engineering · kind

_{My contribution: buildinfo + k8s-client tests.}

From-scratch 2D finite-element solver for steady-state heat conduction in modern C++17. Hand-written Galerkin assembly, a Jacobi-preconditioned CG solve (Eigen), and HDF5/XDMF output for ParaView, validated to second-order accuracy by the Method of Manufactured Solutions.

C++17 · Eigen · CMake · GoogleTest · FEM

_{My contribution: Point/Material value-type tests.}

A container runtime in ~80 lines of Go: a learning re-implementation of the core of docker run. Isolates a process with Linux namespaces (UTS, PID, mount), chroots into a root filesystem, and mounts a private /proc. Standard library only.

Go · Linux namespaces · chroot

_{My contribution: config helpers + tests + CI go-test.}

End-to-end ML predicting whether a second-hand fashion listing sells within 7 days. Covers scraping, time-aware labeling, feature engineering, model comparison, ablation analysis, and a live demo, with XGBoost on top.

Python · XGBoost · scikit-learn · pandas

_{My contribution: pytest suite + first CI workflow.}