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CS + FintechNortheastern University

Luke Waehner.

Luke Waehner

Full Stack Engineer

Backend Engineer @ Smartleaf
02 / Profile

About me

1.3M/sec
Orders processed
$110BAssets reported
3.83GPA

I'm a software engineer working across full-stack development and high-performance systems. At Smartleaf, I'm engineering tree-structured portfolio reporting and PostgreSQL upgrade harnesses that operate across $110B in AUM. In Rust I built a lock-free matching engine that processes 1.3M orders/sec at sub-microsecond latency.

My dual degree in Computer Science and Fintech from Northeastern drives my interest in where finance meets technology: trading infrastructure, payment systems, and the data pipelines that power financial decisions.

Selected Work

My projects

Rust Order Book Exchange
01

Rust Order Book Exchange

Exchange-simulation platform with a lock-free matching engine processing 1.3M orders/sec at sub-microsecond latency. Features async REST/WebSocket APIs for order flow and live book snapshots, validated against 200M+ orders/min benchmarking workloads.

  • Rust
  • Axum
  • Tokio
  • WebSockets
  • HFT
View on GitHub
Stockchart Pro
02

Stockchart Pro

Real-time stock analysis app with advanced technical indicators (RSI, MACD, Moving Averages). Built with Python, Dash, and Plotly with standalone executable distribution.

  • Python
  • Dash
  • Plotly
  • yFinance
  • PyInstaller
View on GitHub
Full Stack News Consolidator
03

Full Stack News Consolidator

Multi-source business news aggregator using web scraping and rotating proxies. Features REST APIs and MongoDB storage for persistent news data.

  • Python
  • Express.js
  • MongoDB
  • React
  • Web Scraping
View on GitHub
Stack

What I build with

Languages
RustPythonTypeScriptJavaScriptRubyJavaC/C++SwiftRHTMLCSS
Frameworks
RailsReactNext.jsTailwindNode.jsStimulus.jsAxumTokioElectron
Data
PostgreSQLMongoDBSQLiteSuperset
Infrastructure & Tools
AWSJenkinsREST APIsGoogle Workspace APIsCI/CD PipelinesGitIntelliJ

Experience

Jan 2026 – Present

Backend Software Engineer

Smartleaf, Boston, MA

Engineered tree-structured allocation reporting and a Cash Sweep automation engine spanning $110B AUM. Built a PG14 to PG18 A/B harness replaying ~1M portfolios to validate upgrade parity. Release master.

May 2024 – Sep 2025

Full Stack Software Engineer (Founder)

Code Works, Boston, MA

Built a Google Workspace and App Script CRM that cut onboarding 55%. Distributed to 100+ professionals serving hundreds of downstream clients across unified Sheets, Gmail, and Calendar workflows.

Sep 2024 – Dec 2026

Computer Science & Fintech Student

Northeastern University, Boston, MA

Dual degree in Computer Science and Fintech, 3.83/4.00 GPA. Dean's List, Manresa Scholar, Best Business Plan Award.

May 2023 – Aug 2023

Wealth Management Intern

Riverside Financial, Riverside, CT

Automated ETF data collection via Morningstar API and VBA, cutting manual retrieval 70%. Technical analysis (RSI, MACD) and risk assessment supporting $100M+ in retirement assets.

Get in Touch

Contact me

Available for co-op roles starting July 2026. Open to full-stack, systems, and fintech engineering positions.

Emailluke.waehner@gmail.com