RU

Open to opportunities

Robert User

@robertchang1128

Senior full-stack software engineer building scalable web platforms with strong API and DevOps expertise.

What I'm looking for

I seek senior engineering roles where I can build scalable systems, lead cross-functional teams, and improve performance, reliability, and developer experience.

I am a senior full-stack software engineer with 10 years of experience building scalable web applications across startups and high-growth tech companies. I design APIs, lead product features end-to-end, and optimize performance with a strong focus on developer experience, clean architecture, and cross-functional collaboration.

At Oscar Health and Robinhood I delivered high-impact features: responsive React frontends, microservices on Django/Node/Go, event-driven systems with Kafka/RabbitMQ, and robust CI/CD and infrastructure-as-code pipelines using Terraform and Kubernetes. I mentor engineers, ensure security and compliance, and drive measurable improvements in performance, reliability, and user engagement.

Experience

Work history, roles, and key accomplishments

OH

Senior Software Engineer

Oscar Health

Oct 2019 - May 2025 (5 years 7 months)

Collaborated on cross-functional teams to build scalable healthcare platforms serving thousands of users; improved frontend load times by 35% and backend performance by 30% while ensuring HIPAA-compliant secure systems.

React Next.js Django PostgreSQL Kafka Terraform Docker

RO

Software Engineer

Robinhood

Aug 2015 - Oct 2019 (4 years 2 months)

Built scalable microservices and a viral pre-launch referral system that grew a waitlist to ~1M users; reduced signup friction and increased user growth by 25% while maintaining 99.8% transaction reliability.

React Python Go AWS PostgreSQL Kubernetes RabbitMQ Docker Jenkins

Education

Degrees, certifications, and relevant coursework

NU

New York University

Bachelor of Science, Computer Science

2009 - 2014

Completed a Bachelor's degree in Computer Science with coursework in software engineering, algorithms, and systems development.

Tech stack

Software and tools used professionally

OpenAPI

Sidekiq

Apache Spark

D3.js

Chart.js

Highcharts

Microsoft Azure

GitHub

GitLab

Bitbucket

Kubernetes

Docker Compose

Cloudflare

AWS CodePipeline

Jenkins

CircleCI

GitHub Actions

Jenkins X

GitLab CI

NumPy

Pandas

DB

MySQL

PostgreSQL

MongoDB

SQLite

MariaDB

Cassandra

CouchDB

Gmail

Node.js

Django

Spring Boot

Ruby on Rails

Next.js

NestJS

Spring MVC

Tailwind CSS

Material-UI

Vuetify

three.js

Neo4j

Microsoft Teams

OpenCV

Redis

Terraform

AWS CloudFormation

Azure DevOps

styled-components

React

axios

Lodash

anime.js

JavaScript

Python

HTML5

Java

CSS 3

TensorFlow

PyTorch

scikit-learn

Keras

NLTK

Mapbox

Kafka

RabbitMQ

FastAPI

TypeORM

Grafana

Prometheus

SQLAlchemy

Datadog

Apollo

Basecamp

GraphQL

Prisma

OData

Firebase

Socket.IO

gRPC

Elasticsearch

Spring Security

Serverless

Deepgram

Zustand

vuex

Vercel

Netlify

RSpec

pytest

JUnit

React Testing Library

OAuth2

Docker

WebRTC

Formik

uWSGI

NGINX

Apache HTTP Server

LiteSpeed

Zapier

IFTTT

Toolkit

s3-lambda

Fomo

MobX

SQL

Octopus Deploy

Workato

SciPy

Hugging Face

Integromat

Playwright

ElevenLabs

Jotai

Availability

Open to opportunities

Location

United States

Authorized to work in

Salary expectations

100k-160k USD

Job categories

Senior Software Engineer Software Engineer Full Stack Engineer Backend Engineer Frontend Engineer DevOps Engineer Site Reliability Engineer Technical Lead Engineering Manager Senior Software Development Engineer Sr. Software Engineer Senior Software Developer Senior Staff Software Engineer Senior Engineer Senior Backend Software Engineer Senior C# .NET Software Engineer Sr. Staff Software Engineer Senior Fullstack Software Engineer

Skills

TailwindCSS ThreeJS NodeJS JavaScript TypeScript React Next.js Vue.Js Redux JavaScript (Node.Js NestJS Prisma Python Django Flask fastAPI Java Spring Boot Ruby on Rails Go HTML5 CSS3 SCSS Tailwind D3.Js GraphQL REST APIs WebSockets Socket.IO RabbitMQ Kafka Redis PostgreSQL MongoDB MySQL Elasticsearch Jest React Testing Library Cypress Playwright Docker Kubernetes Terraform AWS Azure GCP)GitHub Actions Jenkins CI CD Prometheus Grafana ELK Stack Tableau Power BI Vercel Deepgram ElevenLabs Apache Kafka HIPAA Sidekiq Chart.Js HighCharts Microsoft Azure Google Cloud Platform Bitbucket Gitlab Docker Compose AWS CodePipeline CircleCi Jenkins X Gitlab CI NumPy Pandas SQLite MariaDB Cassandra CouchDB Spring MVC Material UI Vuetify Neo4j Microsoft Teams OpenCV AWS CloudFormation Azure DevOps styled components Lodash Axios Anime.Js PyTorch scikit learn Keras Mapbox TypeORM SQLAlchemy Apollo Basecamp OData gRPC Spring Security Serverless Zustand Vuex Netlify RSpec Pytest Junit WebRTC Formik UWSGI Nginx LiteSpeed Gunicorn IFTTT Toolkit GitHub Cloudflare ReadMe.Io Firebase MobX)NLTK S3 Lambda SQL Octopus Deploy Hugging Face Scipy Integromat Fomo Gmail)Apache HTTP Server Apache Spark Heroku DigitalOcean TensorFlow Zapier OpenAPI OAUTH2 Workato Datadog Jotai

Interested in hiring Robert?

You can contact Robert and 90k+ other talented remote workers on Himalayas.

People also viewed

View all talent

Find your dream job

Sign up now and join over 100,000 remote workers who receive personalized job alerts, curated job matches, and more for free!

Robert User - Senior Software Engineer - Oscar Health | Himalayas