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Sam Ehlers
AVAILABLESUMMER 2027

Sam Ehlers

Security, ML, and embedded systems — shipped to production at three startups before graduating.

BASED IN
Boston, MA
FOCUS
Security · ML · Embedded
EDU
Northeastern CS + Business
GRAD
May 2027
Sam Ehlers

SAM EHLERS · BOSTON, MA · 42.3601°N 71.0589°W

Impact

The 60-second version

Four numbers that are mine, each with a dated source — not the company's.

AVAILABLE
SUM 2027
Graduating Northeastern in May 2027; available full-time from Summer 2027.
FRAUD PREVENTED
$250K+
AI check-fraud detection I built at Overwatch Data, over four months.
SHIPPED AT
3STARTUPS
Production code at Overwatch Data (YC S22), Larx, and WHOOP — all before graduating.
GPA
3.8/ 4.0
Northeastern, B.S. Computer Science & Business Administration.
Where I’ve shipped
WHOOPLarxOverwatch Data
Experience
3 ROLES · 2022 — PRESENT

Where I've shipped

WHOOP
JUL 2026 — DEC 2026

Software Engineer

Boston, MA

Account security and identity on the auth platform.

  • Built machine learning into auth-service that detects account-takeover attempts in-line and blocks them before they land.
  • Automated triage and assignment of inbound HackerOne vulnerability reports, driving on-time response attainment from a 63% baseline toward an 85% target.
  • Planned and ran database migrations against the largest, oldest production database at WHOOP to unblock MFA during member onboarding.
Stack
PythonSQLAWSGit
Larx
JUL 2025 — DEC 2025

Software Engineer

Boston, MA

Geospatial intelligence software for government customers.

  • Built geospatial intelligence software for government customers alongside engineers out of SOCOM, the CIA, and the U.S. Air Force.
  • Fused NodeODM photogrammetry, three.js rendering, Ollama + GraphRAG retrieval, and Keycloak identity into a single coherent platform.
  • Leaned on Cursor to move at the speed a small defense-tech startup needs.
Stack
TypeScriptPythonNodeODMthree.jsOllamaGraphRAGKeycloakCursorGit
Overwatch Data
JUN 2022 — AUG 2024

Software Engineer & Cyber Analyst

Atlanta, GA

Fraud detection, auth, and customer-facing backend at a newly founded YC company.

  • Designed customer-specific data storage, ML, and backend systems for enterprise risk teams, including Vanguard and SoFi.
  • Pioneered AI check-fraud detection on top of proprietary Telegram and social-media scrapers, preventing over $250K in check fraud in four months.
  • Owned authentication end to end: Google SSO, Okta SSO, multi-factor authentication, and email/password.
  • Ran MVP demos and sales conversations with prospective enterprise customers, including Franklin Templeton, Goldman Sachs, Tesla, and Ginkgo Bioworks.
Vanguard· customerSoFi· customerFranklin Templeton· prospectGoldman Sachs· prospectTesla· prospectGinkgo Bioworks· prospect

Organizations I built for or pitched while at Overwatch Data. Named to describe my own work — not an endorsement, partnership, or affiliation. All marks belong to their owners.

Stack
PythonSQLPandasNumPyGoogle CloudOktaGit
Projects
8 PROJECTS · 11+ TECHNOLOGIES

What I build when no one's asking

Embedded / Vehicle
PRJ / 01ACTIVE

Mini Dynamometer (opens in a new tab)

A water-brake dyno I machined, wired, and wrote the firmware for.

A CNC-machined water-brake dynamometer that measures horsepower and torque on internal combustion engines. A FreeRTOS firmware stack on an ESP32 streams live runs to a companion Swift app on iPhone.

CSwiftFreeRTOSESP32KiCadSolidWorks
SOURCE
PRJ / 02ACTIVE

Traction Control (opens in a new tab)

A PID controller running on 25A's vehicle control unit.

A PID traction-control algorithm running on the vehicle control unit of Northeastern Electric Racing's 25A car, keeping wheel slip in check under hard acceleration.

Team repoNER

MY CONTRIBUTION — I designed and deployed the PID traction-control algorithm.

C
SOURCE
PRJ / 03ACTIVE

BMS Firmware (opens in a new tab)

Battery management firmware for 25A's electric racecar.

Firmware for the battery management system on Northeastern Electric Racing's 25A car — the software that keeps the pack safe and the car legal to run.

Team repoNER

MY CONTRIBUTION — I wrote and deployed the BMS software running on the boards.

C
SOURCE
Systems / Languages
PRJ / 04SHIPPED

LoxVM (opens in a new tab)

A memory-safe scripting language written from scratch in Rust.

A scripting language built from the ground up in Rust, with functions, loops, and smart variable typing. Ships low-level debugging tools, including a live visualization of the stack as programs execute.

Rust
SOURCE
PRJ / 05SHIPPED

DS Online (opens in a new tab)

A multiplayer Nintendo DS emulator running in the browser.

A browser-based Nintendo DS emulator instance with multiplayer support, so two players can connect and play the same session over the network.

Python
SOURCE
PRJ / 06SHIPPED

FIXPDF (opens in a new tab)

Turns FIX protocol PDFs into deterministic, callable APIs.

Parses FIX protocol specification PDFs and automatically maps their message definitions into deterministic API routes on an Express.js server — replacing manual protocol-to-API translation with a repeatable pipeline.

PythonExpress.js
SOURCE
ML / Data
PRJ / 07ACTIVE

Auction Estimate (opens in a new tab)

Predicts what an enthusiast car will sell for at auction.

Predicts enthusiast-car auction prices (MINI Cooper, VW Golf, BMW wagons) on Bring a Trailer and Cars & Bids using quantile regression, sell-probability modeling, comps, and macro signals.

PythonPandasNumPy
SOURCE
PRJ / 08SHIPPED

NewStockMCP (opens in a new tab)

An MCP server that hands stock news to LLM clients.

A Model Context Protocol server that exposes real-time stock news as a structured tool an LLM client can call directly.

Python
SOURCE
Archive
Leadership

Running the operations side

NERJUL 2026 — PRESENT

Chief Operations Officer

Cross-functional program management for a student-built electric formula car.

  • Run program management across the electrical, mechanical, business, and software sub-teams for the Formula SAE Electric and Formula Hybrid+Electric cars.
  • Set club-wide OKRs jointly with the president and own the KPIs that track them across all four sub-teams.

Firmware I built for this team is covered under Projects → Embedded / Vehicle.

Skills

What I reach for

● Primary    ○ Working knowledge
Languages
  • Python
  • C
  • C++
  • Rust
  • TypeScript
  • JavaScript
  • SQL
  • Java
  • Swift
  • CSS
Systems
  • Linux
  • Git
  • macOS
  • Clang
  • Windows
Frameworks & Cloud
  • AWS
  • Google Cloud
  • FreeRTOS
  • Embassy-rs
  • Pandas
  • NumPy
Hardware & CAD
  • KiCad
  • Onshape
  • SolidWorks
Certifications
  • Stanford UniversityMachine Learning Specialization — Stanford Online / DeepLearning.AI
  • MITIntroduction to Deep Learning — MIT 6.S191
  • University of Colorado BoulderIntroduction to Power Electronics — University of Colorado Boulder
Contact

Let's build something

I’m looking for Summer 2027 opportunities in security, ML, or embedded systems.

Outside of work I’m usually at the piano, on a basketball court, or under a car — most recently the one attached to a dynamometer in my garage.

AVAILABLESUMMER 2027
Emailsamtehlers@gmail.com
GitHubEhlOps(opens in a new tab)LinkedInsam-ehlers(opens in a new tab)Xsamtehlers(opens in a new tab)