RC

Open to opportunities

Robert Charles

@robert

I am a full-stack engineer building scalable, secure web platforms.

What I'm looking for

I'm seeking senior engineering roles building scalable, secure SaaS products with cloud-native stacks, cross-functional teams, strong developer experience, and opportunities to mentor and lead technical initiatives.

I am a senior full-stack software engineer with 10 years' experience building scalable web applications across startups and high-growth tech companies.

At Oscar Health I collaborated in cross-functional teams to build secure, reliable healthcare platforms — improving frontend load times by 35% and backend performance by 30% while ensuring HIPAA compliance and delivering analytics dashboards.

At Robinhood I engineered the viral pre-launch referral system that helped build a waitlist of nearly 1 million users, implemented event-driven architectures processing 5M+ daily transactions at high reliability, and automated CI/CD to accelerate releases.

I work across modern JavaScript frameworks, Python, Java, Go and Ruby on Rails, and leverage cloud-native infrastructure, Kubernetes, Terraform and observability tooling. I focus on developer experience, clean architecture, mentorship, and leading end-to-end product features.

Experience

Work history, roles, and key accomplishments

OH

Senior Software Engineer

Oct 2019 - May 2025 (5 years 7 months)

Led development of scalable healthcare platforms serving thousands of users, improving frontend load times by 35% and reducing frontend defects by 30%. Optimized backend performance by 30%, implemented HIPAA-compliant security practices, and automated deployments on AWS EKS.

React Next.js Django Kafka PostgreSQL Terraform Docker

RO

Software Engineer

Aug 2015 - Oct 2019 (4 years 2 months)

Engineered a viral pre-launch referral system that built a ~1M-user waitlist and reduced signup time to seconds, driving 25% user growth. Built and scaled microservices and event-driven systems processing 5M+ daily transactions at 99.8% reliability and cut deployment time by 25% via CI/CD automation.

React Python Go AWS PostgreSQL Kubernetes RabbitMQ Docker CI CD

Education

Degrees, certifications, and relevant coursework

CB

California State University, Long Beach

Bachelor of Science, Computer Science

2011 - 2015

Completed a Bachelor of Science in Computer Science at California State University, Long Beach (2011–2015), focusing on software engineering and systems.

Tech stack

Software and tools used professionally

OpenAPI

Sidekiq

Apache Spark

D3.js

Chart.js

Highcharts

Microsoft Azure

Google Cloud Platform

DigitalOcean

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

ReadMe.io

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

Heroku

Apollo

Basecamp

GraphQL

Prisma

OData

Firebase

Socket.IO

gRPC

Elasticsearch

Spring Security

Serverless

Deepgram

Zustand

vuex

Vercel

Netlify

TypeScript

RSpec

pytest

JUnit

React Testing Library

OAuth2

Docker

WebRTC

Formik

uWSGI

NGINX

Apache HTTP Server

LiteSpeed

Gunicorn

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-120k USD

Job categories

Senior Software Engineer Full Stack Engineer Frontend Engineer Backend Engineer DevOps Engineer Software Architect Technical Lead Senior Software Development Engineer Sr. Software Engineer Senior Software Developer Senior Staff Software Engineer Senior Engineer Senior Backend Software Engineer Sr. Staff Software Engineer Senior Fullstack Software Engineer Senior Product Engineer

Skills

ThreeJS NodeJS JavaScript TypeScript React Vue.Js Next.js JavaScript (Node.Js NestJS Prisma TypeORM Python Django Flask fastAPI Pandas NumPy SQLAlchemy Java Spring Boot Ruby Ruby on Rails Go HTML5 CSS3 SCSS Tailwind Material UI D3.Js GraphQL REST APIs WebSockets Socket.IO RabbitMQ Kafka Redis PostgreSQL MySQL MongoDB Elasticsearch Docker Kubernetes Terraform AWS Microsoft Azure Google Cloud Platform Git Jenkins GitHub Actions)CI CD Jest React Testing Library RSpec Cypress Playwright Prometheus Grafana ELK Stack Datadog Vercel Tableau Power BI Sidekiq Chart.Js HighCharts Bitbucket Gitlab Docker Compose AWS CodePipeline CircleCi Jenkins X Gitlab CI SQLite MariaDB Cassandra CouchDB Spring MVC Vuetify Neo4j Microsoft Teams OpenCV AWS CloudFormation Azure DevOps styled components Lodash Axios Anime.Js PyTorch scikit learn Keras Mapbox Apollo Basecamp OData gRPC Spring Security Serverless Deepgram Zustand Vuex Netlify 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 ElevenLabs Jotai

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Robert Charles - Senior Software Engineer - Oscar Health | Himalayas