Aaron Paul
I'm a software engineer who enjoys building across the stack, from consumer-facing applications to the systems and infrastructure behind them.
My experience spans mobile and backend development, data systems, and systems engineering, with a particular interest in modern C++, concurrency, and performance engineering. I've worked on production applications, third-party integrations, and operational automation, while also exploring lower-level engineering through projects involving market data processing, network programming, and lock-free data structures.
I enjoy understanding how things work at different levels of abstraction, whether that's designing a product experience, building reliable backend services, or figuring out how to make a system faster and more efficient. What interests me most is taking an idea, working through the technical and practical challenges, and turning it into something real.
Work
Korner Rewards
Publicly released · iOS & Android
A customer-facing loyalty app for a multi-location convenience and fuel retailer. I prototyped it on my own initiative, got stakeholder approval, mapped the existing loyalty systems, and built the initial frontend, backend, and loyalty integration for what became a publicly released app.
Kotlin Multiplatform, Android, iOS, Swift, Node.js, TypeScript, PostgreSQL
Wadrova
In development · not yet released
A wardrobe app in development. It turns garment photos into clean product images, builds outfits from what you own, and previews them on a model of you. The plan is a stylist that learns your taste and suggests new pieces only when they fit your closet. I’m building the app, backend, and GPU worker myself.
Kotlin Multiplatform, Compose, FastAPI, PostgreSQL, SAM 3
Retail Data Systems & Automation
Korner Enterprise Services · OBLS International LLC
Python ETL automation across 10+ retail locations, Kafka-based fuel inventory reconciliation, and downstream Power BI reporting at Korner Enterprise Services, plus separate reporting work at OBLS International LLC.
Python, Apache Kafka, PostgreSQL, Airflow, Power BI, ETL, TypeScript/React
NASDAQ ITCH Replay Engine
Personal project · public on GitHub
A C++23 engine that replays a recorded NASDAQ trading day over UDP multicast and rebuilds every order book on the receiving side. Each replay is checked by diffing its books against an offline build of the same file.
C++23, UDP Multicast, Lock-free SPSC, NASDAQ ITCH 5.0, Order Books
BitTorrent Client
Personal project · download only, no seeding yet
A BitTorrent client written from scratch in C++20 for Linux. It finds peers through HTTP and UDP trackers, downloads from them on a single epoll event loop, and checks every piece against its SHA-1 hash before writing it to disk.
C++20, epoll, BitTorrent, Concurrency, Linux
Experience
OBLS International LLC
Software Engineer, June 2026 - Present
Reporting tools and data reconciliation for Operations and Finance.
Korner Enterprise Services
Software Engineer, January 2025 - April 2026
Customer-facing mobile and backend work on the Korner Rewards loyalty app, alongside Python ETL automation across 10+ locations and Kafka-based fuel inventory reconciliation.
University of Rochester
Research Assistant, June 2024 - August 2024
Query-optimization research on DuckDB, the in-process analytical database.