Brandon Mojica logoBrandon Mojica

About

Senior backend engineer and systems architect focused on enterprise platforms, ERP systems, API architecture, and production software for finance and operations.

ENGINEERING PROFILE

Backend engineer and systems architect focused on enterprise platforms, API architecture, and business-critical software for finance and operations.

I design and build systems where operational clarity, domain modeling, and backend reliability matter more than superficial complexity.

My path started by leading the evolution of internal systems and later evolved into directly designing and building enterprise backend platforms used daily by operational and financial teams.

My work focuses on business systems — ERP, credit, and financial platforms — built on API-oriented backend architectures used every day by operational and administrative teams.

That means translating real business rules into stable architecture, defining clear boundaries between domains, services, and business workflows, and building backend platforms that can evolve without breaking operations.

ERP Platforms
Backend Architecture
Financial Systems
FastAPI
AWS

Systems I design and build

Systems shaped by real operational constraints rather than demonstration assumptions.

Enterprise platforms

ERP and internal platforms that integrate finance, sales, inventory, human resources and reporting within a unified domain-oriented operational model.

Backend service architecture

API platforms with explicit business logic, traceable state transitions and clear service boundaries that support long-term system evolution.

Financial systems

Credit, payments, reconciliation, account statements and accounting controls where consistency, traceability and auditability are part of the architecture.

Professional Path

A career built inside real business operations, designing and evolving systems that support the company’s daily operations.

I currently lead system architecture and internal platform development at Elements Of Steel, where since 2019 I have been responsible for designing, building and evolving software critical to business operations.

The most representative project of this work is Businext ERP, an enterprise platform built from scratch to support finance, sales, inventory, human resources, operational dashboards and administrative workflows used daily in production.

My academic background includes a Computer Systems Engineering degree and a Master’s in Data Science for Business from UTEL. This combination strengthened both my software engineering discipline and my approach to designing systems informed by data and operational decision making.

Architecture principles

Architecture should reduce operational risk and make system complexity explicit, understandable and evolvable.

Model the business before the code

I start with business flows, responsibilities and failure points before designing the technical model. A useful architecture reflects how the business actually works and how its rules evolve.

Keep logic close to the domain

In business systems, correctness depends on where the rules live. I prefer service layers and explicit domain logic instead of thin CRUD around the database.

Optimize for maintainability under growth

Systems become costly when modules know too much about each other. Clear domain boundaries and expressive code allow platforms to evolve without becoming fragile.

Reliability as a design decision

Auditability, predictable state transitions, system events and idempotency mechanisms are not post-launch concerns. They must exist in the system model from the beginning.

Technology Focus

Technologies I most frequently use to design, build and operate enterprise systems with a strong backend focus.

Backend

Python
FastAPI
SQLAlchemy
Pydantic
REST APIs

Frontend

React
TypeScript
TailwindCSS
MUI
Axios

Infrastructure

AWS EC2
AWS S3
Linux
Nginx
System operation and production deployment

Architecture

ERP systems
Financial systems
Service layers
Domain boundaries
Operational automation

What I'm Looking For

I look for environments where backend engineering and systems thinking directly influence product quality.

I'm interested in platforms where architecture, maintainability and domain clarity are central to development rather than afterthoughts.

I aim to contribute as a senior backend engineer or systems architect in products where designing, evolving and operating complex systems is part of the daily work.