I Build Systems
That Scale
Senior Software Engineer specializing in transforming complex technical challenges into elegant, profitable solutions
Trust & Credibility & Expertise
Client testimonials and technical credentials that demonstrate proven expertise and reliability
"Fernando delivered SageConnect, our comprehensive logistics platform. His expertise in full-stack development and system integration was crucial for our operations."
"The SageSync system Fernando developed has streamlined our copper processing operations. His technical leadership in implementing SageConnect was outstanding."
"Fernando's technical solutions transformed our operations. His system optimization skills streamlined our remodeling supply chain across all locations."
"The gym management system Fernando built has revolutionized how we operate. His full-stack expertise and business understanding made all the difference."
Technologies
Tech Stack
Technologies and tools I use to build scalable, high-performance applications
Constantly evolving my technical skills to deliver cutting-edge solutions using industry-leading technologies and best practices.
Professional Timeline
From writing my first line of code to leading engineering teams
Software Developer
- --Academic and startup projects focused on employee management
- --Document generation and integrations
- --Built foundations in software development
Software Engineer
- --Delivered data automation systems reducing manual errors to zero
- --Improved operational throughput across departments
- --Built Node.js/Express integrations with Sage 300 Web API
Full Stack Developer
- --Core development of car rental booking platform
- --Implemented CI/CD and payment integrations
- --Next.js frontend with seamless user experience
Senior Full Stack Developer
- --Lead developer on automation and integration projects
- --Responsivas and access management systems
- --Leading technical strategy and team development
The Challenge
Manual data processing between Sage 300 ERP and supplier portals was causing frequent errors, delays, and inefficient workflows across multiple departments affecting 200+ staff members.
My Role
- --Architected automation system design
- --Developed backend services in JavaScript
- --Built the complete system from scratch
Solution
Architecture: Microservices
- --JavaScript for agile and maintainable development
- --Docker containers for consistent deployments
- --SQL Server for reliable transaction processing
Business Impact
The Challenge
Disconnected inventory systems between Sage 300 ERP and Fracttal CMMS led to stock discrepancies, manual reconciliation, and lack of real-time visibility.
My Role
- --Designed real-time sync architecture
- --Built monitoring dashboards
- --Implemented OAuth2 token management
Solution
Architecture: Event-Driven
- --Node.js for real-time event processing
- --OAuth2 for secure API authentication
- --SQL Server for reliable data persistence
Business Impact
The Challenge
Car rental business needed modern booking platform with payment processing, invoice generation, and administrative controls to compete in digital marketplace.
My Role
- --Built Next.js frontend and booking flow
- --Integrated payment gateways and XML invoicing
- --Set up CI/CD pipeline and admin dashboards
Solution
Architecture: Serverless
- --Next.js for SEO-optimized booking pages
- --MongoDB for flexible booking data
- --Vercel for seamless deployments
Business Impact
The Challenge
Manual billing processes, RFC validation errors, and payment restrictions were causing billing inaccuracies and requiring extensive manual intervention.
My Role
- --Developed custom Odoo modules
- --Automated billing and validation workflows
- --Integrated payment restriction controls
Solution
Architecture: Modular
- --Python modules for Odoo framework integration
- --PostgreSQL for robust data handling
- --Apache POI for document processing
Business Impact
The Challenge
Local gyms needed affordable membership management system with KPI dashboards and reporting capabilities for efficient operations and growth tracking.
My Role
- --Designed membership management system
- --Built KPI dashboards and analytics
- --Optimized for rapid deployment
Solution
Architecture: Serverless
- --Next.js for fast, SEO-friendly admin interface
- --PostgreSQL for reliable membership data
- --Vercel for cost-effective hosting
Business Impact
The Challenge
House cleaning businesses managed operations through spreadsheets and WhatsApp, with no scheduling automation, no worker tracking, and no integrated billing — losing revenue and creating scheduling chaos.
My Role
- --Architected multi-tenant SaaS platform end-to-end
- --Led technical decisions, client requirements, and product direction
- --Built core systems: offline PWA, Stripe billing, risk management
Solution
Architecture: Monorepo (3 Apps)
- --Fastify for high-performance REST API with JWT auth
- --Prisma with tenant isolation for multi-tenant safety
- --IndexedDB + Service Workers for offline-first mobile
Business Impact
The Challenge
An algorithmic trading experiment currently running on OANDA paper trading (no real money at risk). Carry trades are theoretically profitable (4-5% annual spread from JPY interest rate differentials) but manual execution is emotional, inconsistent, and vulnerable to catastrophic drawdowns during risk-off events.
My Role
- --Designed V3 trend-following carry strategy
- --Built 5-layer adaptive risk management pipeline
- --Deployed 24/5 automated execution on AWS
Solution
Architecture: Event-Driven Pipeline
- --Hourly ticks for faster feedback vs daily timeframes
- --5-layer risk sizing: Kelly + ATR + regime + correlation + DD
- --SQLite WAL persistence for container crash recovery
Business Impact
Technical Skills
Not just buzzwords - real experience with measurable impact
Programming Languages
JavaScript
4 years
Built complex web applications and automation systems
TypeScript
3 years
Type-safe systems reducing bugs by 60%
Java
2 years
Backend services and enterprise applications
Python
2 years
Odoo modules and automation scripts
Frameworks & Libraries
Next.js
3 years
Cardeal platform with SSR and payment integration
React
4 years
Multiple dashboard and booking platforms
Node.js
4 years
SageSync real-time inventory synchronization
Spring Boot
2 years
Enterprise Java backend services and REST APIs
Express
3 years
RESTful APIs and microservices architecture
Databases & Data Management
MySQL
4 years
Enterprise data management and relational database systems
PostgreSQL
3 years
Cleany multi-tenant SaaS and Gym Manager operations platform
MongoDB
2 years
Cardeal booking data and document storage
Cloud & DevOps
AWS
2 years
Cloud infrastructure and serverless deployments
Docker
3 years
Containerized microservices across all projects
Jenkins
2 years
SageConnect CI/CD automation pipeline
Vercel
2 years
Next.js deployments for multiple client projects
GitHub Actions
2 years
Automated testing and deployment workflows
My Development Process
As lead engineer on projects like Qardeal, my workflow focuses on end-to-end system architecture, core backend development, and cross-team leadership. Each stage ensures scalable, maintainable solutions.
Research & Discovery
Lead technical discovery sessions, analyze business requirements, and assess system architecture needs. Define technical feasibility and success metrics.
Key Activities
- •Technical discovery leadership
- •System architecture assessment
- •Backend requirements analysis
- •Performance metrics definition
Architecture & Planning
Lead core architecture design, select optimal technology stack, and establish backend infrastructure patterns. Plan development phases and deployment strategy.
Key Activities
- •Core system architecture leadership
- •Backend technology stack design
- •Development milestone planning
- •Infrastructure pipeline design
Development & Integration
Lead core backend development, coordinate full-stack implementation, and ensure code quality through reviews. Maintain clean architecture across all layers.
Key Activities
- •Core backend development leadership
- •Full-stack integration coordination
- •Technical code review leadership
- •Architecture quality enforcement
Testing & Quality Assurance
Lead testing strategy implementation, conduct performance optimization, and ensure system reliability through comprehensive QA processes.
Key Activities
- •Testing strategy leadership
- •Backend performance optimization
- •System integration validation
- •Production readiness assessment
Research & Discovery
Lead technical discovery sessions, analyze business requirements, and assess system architecture needs. Define technical feasibility and success metrics.
Key Activities
- •Technical discovery leadership
- •System architecture assessment
- •Backend requirements analysis
- •Performance metrics definition
Architecture & Planning
Lead core architecture design, select optimal technology stack, and establish backend infrastructure patterns. Plan development phases and deployment strategy.
Key Activities
- •Core system architecture leadership
- •Backend technology stack design
- •Development milestone planning
- •Infrastructure pipeline design
Development & Integration
Lead core backend development, coordinate full-stack implementation, and ensure code quality through reviews. Maintain clean architecture across all layers.
Key Activities
- •Core backend development leadership
- •Full-stack integration coordination
- •Technical code review leadership
- •Architecture quality enforcement
Testing & Quality Assurance
Lead testing strategy implementation, conduct performance optimization, and ensure system reliability through comprehensive QA processes.
Key Activities
- •Testing strategy leadership
- •Backend performance optimization
- •System integration validation
- •Production readiness assessment
Ready to start your project?
Let's discuss your needs and create a custom plan that delivers real value to your business.
Schedule a Free ConsultationLet's Connect
Whether you have a project in mind, need consulting, or just want to chat about tech - I'd love to hear from you.