Richard O
Full-stack engineer.
( Yes, O is my real last name. Not an initial! )
I build and scale web applications from database to deploy. Currently building FullStackPrep.org, an interview prep platform for software engineers.
Based in
West Orange, NJ · NYC Metro Area
About
The short version
I'm a full-stack engineer who went from managing million-dollar insurance accounts to building software that processes millions of data points. The career pivot was the best decision I made.
After completing Hack Reactor, I spent 3.5 years at Schlosser Geographic Systems building high-performance data processing pipelines for telecom clients like AT&T and T-Mobile. I refactored APIs, cut P99 latency by 80%+, built regression testing with 100+ scenarios, and mentored junior engineers in React, Python, C#, and .NET.
In 2026 I founded FullStackPrep.org and built the technical side of the platform. Next.js frontend, PostgreSQL database, AWS infrastructure, real-time WebRTC video, collaborative code editing, and CI/CD pipelines deploying to Cloudflare Workers.
Education
Hack Reactor
Advanced Software Engineering Immersive, 2021
.
Temple University
BBA, Risk Management & Insurance, 2014
Experience
4+ years building software
Founder
CurrentFullStackPrep.org
2026 - Present
Interview prep and job search platform for software engineers.
- Built the full technical stack: frontend, backend, infrastructure, and deployment
- Cloud infrastructure: AWS ECS Fargate, Lambda, ElastiCache, Cloudflare Workers, CI/CD
- Real-time features: WebRTC video, Yjs CRDTs for collaborative editing, Redis matchmaking queue
Software Engineer II
Schlosser Geographic Systems
2023 - 2025
Geospatial data processing and visualization for telecom clients.
- Built multi-threaded data processing jobs on AWS Lambda for AT&T and T-Mobile
- Refactored GPS job status API, cut P99 latency by 80%+
- Built React dashboard backed by Python microservices for geospatial data visualization
- Created regression testing tool with 100+ end-to-end test scenarios
- Mentored junior engineers in React, Python, C#, and .NET
Software Engineer I
Schlosser Geographic Systems
2022 - 2023
Codebase modernization and operations support.
- Modernized legacy codebases: updated packages, converted to TypeScript, added unit tests
- Supported acceptance testing, deployment, and technical support with operations team
Skills
Tech I reach for
Front-End
Back-End
Cloud & DevOps
Tools
Featured Project
The thing I'm most proud of
I built FullStack Prep because I was tired of stitching together 5 different tools to prepare for interviews. It's an all-in-one platform where engineers can do live collaborative mock interviews, track their job applications, and connect with other job seekers.
FullStack Prep
Interview prep & job search platform
Live mock interviews with WebRTC peer-to-peer video
Collaborative code editor powered by Yjs CRDTs
Redis-backed matchmaking queue for session pairing
Job application tracking and progress monitoring
OAuth/PKCE authentication via AWS Cognito
Edge deployment on Cloudflare Workers
Architecture
Frontend
Next.js, React, TypeScript, Tailwind CSS
Backend
PostgreSQL, Redis, Node.js, REST APIs
Infrastructure
AWS (ECS, Lambda, ElastiCache), Terraform, Docker
Real-time
WebRTC, Yjs CRDTs, WebSockets
Contact
Let's talk
Open to engineering roles, collaborations, and interesting projects.
Richard O · 2026
Built with Next.js & Tailwind CSS