Hi, my name is

Alex Cheng.

I design clean, scalable systems.

Lately, I’ve been building infrastructure for fraud detection, robotics, and real-time inference at scale.

About Me

Hi! I’m Alex, a New York-based student studying Computer Engineering at NYU, enthusiastic about building fast, resilient systems that lie at the intersection of backend infrastructure, machine learning, and real-world impact.

I have worked across robotics startups, semiconductor companies, and fintech platforms—shipping systems involving real-time data, ML pipelines, and distributed infrastructure.

PythonJavaC/C++GoTypeScriptPyTorchKafkaKubernetesFlaskAuroraDynamoDBTemporalDocker

Where I’ve Worked

May 2024 — Present

Software Engineer Intern

· Square (Block, Inc.)

Build and scale Square's backend payments infrastructure for risk decisioning, integrating streaming data pipelines, real-time model inference, and feature generation at scale.

JavaKafkaKubernetesDynamoDBTemporal

Nov 2024 — Jan 2025

Software Engineer Intern

Explored real-time systems for embodied AI, unifying perception, control, and decision-making across multimodal inputs for more responsive, interactive agents.

PythonTypeScriptLiveKit SDKRealtime API

Jun 2023 — Aug 2023

Software Engineer Intern

· Onto Innovation

Architected async-first diagnostics pipelines for high-throughput hardware telemetry, leveraging signal processing and ML-driven fault detection.

PythonC++NumPypandasasyncio

Some Things I’ve Built

Sentr: Graph-Native Infrastructure for Card Payment Security

Sentr detects card testing fraud in real-time using temporal graph neural networks.

PythonPyTorch (PyG)TGATKafka

Lumo: Safe, Independent Aging

Lumo supports independent living for seniors through real-time health monitoring, conversational AI, and proactive caregiving.

PythonCTensorFlowRealtime API

Roam: Travel Without Barriers

Roam helps travelers communicate, navigate, and connect across cultures with real-time contextual translation and intelligent insights.

PythonRealtime APIWhisperFastAPI

x86 Cache Simulator

An x86 cache simulator supporting LRU policies and memory access logging, paired with an emulator for analyzing performance.

Get in Touch

I’m always open to new opportunities, collaborations, or just a friendly chat. Fill out the form below and I’ll get back to you soon.