Penelope Colins, Full-Stack Programmer

Portfolio of Penelope Colins, full-stack programmer in Atlanta, GA. I design and build reliable web apps, APIs and automations.

PenWebWriter

I design and build reliable web apps, APIs, and automation.

Hello, I’m Penelope Colins- a full-stack programmer based in Atlanta.

I build fast, stable, human-friendly software that helps teams scale their digital products without breaking things. Whether it’s an interactive web app, an integration layer, or a data pipeline, my goal is always the same: write clean code that keeps working long after launch

Over the past few years, I’ve shipped 10 + production apps, maintained 99.95 % uptime, and improved clients’ load times by 30 % on average.
My work has powered dashboards, booking systems, and internal tools for startups, nonprofits, and mid-sized tech teams.

Featured

LaunchDesk- SaaS Dashboard (React + Node)

The challenge: real-time reporting was crashing under traffic spikes.
I refactored the backend with clustered Node services + Redis caching. Result: TTFB ↓ 48 %.

FinScope API- Financial Integrations (Python + FastAPI)

The client needed unified API access to 3 banks.
I built a resilient ETL pipeline with OAuth rotation and error queuing. Transactions sync 99.9 % reliably.

EcoTrack- IoT Monitoring System (Next.js + AWS IoT)

I implemented device registration flows and MQTT listeners for 2 000 + sensors. Reduced data loss by 90 %.

What I Do

I help companies turn ideas into maintainable systems:

/ Dashboards • APIs & Integrations • Data Pipelines & Automation • DevOps & CI/CD • Technical Writing & Docs

Skills & Stack

JavaScript / TypeScript • Python • React • Next.js • Node • FastAPI • PostgreSQL • Docker • AWS • GCP • GitHub Actions • Terraform • Linux • Jest / PyTest

Testimonials

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“Penelope’s API work cut our sync errors from hundreds a day to none. Absolute pro.”

Martin Reed, CTO at FinScope

“Every commit was documented and tested. She made handover effortless.”

Olivia Nguyen, Project Lead at LaunchDesk

“Reliable, communicative, and always ahead of schedule.”

Jacob Lopez, Operations Manager at EcoTrack

Process Overview

Discover → Design → Build → Test → Launch → Support

I start with a short discovery call to define scope and success metrics, then deliver incremental updates in GitHub branches.
Automated tests and CI/CD ensure stable rollouts. After launch, I monitor performance and offer continued support on retainer.

Have a project in mind?

Let’s build something that scales.