Emily Fernandez
Full-Stack Developer & Data Scientist
I build production systems end-to-end — backend, data layer, frontend, and deployment.
From custom platforms with financial reporting and inventory logic, to applied ML and predictive modeling on regulated data — I work across the full stack of software and data engineering. Also available for SEO-driven marketing sites when that's what the project calls for.
About Me
Full-Stack Engineer & Applied Data Scientist
I'm Emily Fernandez, founder of Efinitiv — an independent developer and data scientist building production systems end-to-end: database schema, backend logic, frontend, and deployment.
I design and build custom platforms for businesses that need more than a template — inventory and ops tools, ticketing/workflow systems, financial dashboards, and other purpose-built software tailored to how a business actually runs.
On the data science side, I work across predictive modeling, model validation, and applied machine learning — including contract engagements on regulated medical data, technical documentation, and collaboration with scientific teams. I work at the code level across the full stack, not wiring together no-code tools.
Production Systems
Custom platforms with real business logic — inventory, finance, ops, auth, and APIs
Applied Data Science
Statistical modeling, predictive ML, and data validation on production and regulated datasets
Work
Production platforms, data science contracts, and marketing sites
SoleTags — Consignment & Resale Platform
Full-Stack Business Management System
Production platform for a consignment/resale operation. Built the full system from schema design through deployment: FIFO inventory accounting, barcode scanning, parent-child dropship tracking, financial reporting dashboard, and automated notifications.
Key Features
Predictive Model Validation — Medical Device
Data Science Consulting (Contract)
Contracted to diagnose and fix a failing predictive rejection algorithm for blood transport data loggers at a medical device company. Performing full codebase analysis to identify why model performance degraded, then implementing the fix — alongside technical documentation and scientific collaboration prep.
Key Features
J.R. A/C Solutions
Local Business Website + SEO
SEO-optimized marketing site for a local HVAC business. Delivered #1 local search ranking and measurable lead growth. One of several small-business marketing sites built for clients in home services and hospitality.
Key Features
Project Showcase
See my work in action with live demos and detailed project walkthroughs
SoleTags — Consignment & Resale Platform
Full-Stack Business Management System
Live Demo
Mobile Optimized
J.R. A/C Solutions
Local Business Website + SEO
Live Demo
Mobile Optimized
Technical Expertise
Frontend
Data Science
Backend & Infra
SEO & Marketing
Let's Build Something
Available for full-stack development projects, data science contracts, and select marketing site work. Let's talk about what you're building.
GitHub
github.com/emjuliet
Portfolio
efinitiv.com
Currently accepting new projects • Full-stack, data science & consulting