Custom software engineered to automate operations and scale.
I design and build custom software that helps businesses automate operations, manage inventory, sell online, integrate payments and scale confidently. From architecture to deployment, I deliver production-ready solutions.
The core problem
Spreadsheets work until the day they stall your
growth.
Many companies grow before building proper controls. Volume increases, data gets scattered, closing becomes heavy, and business owners don't just suffer from a lack of technology. They suffer from a lack of visibility.
Orders lost on WhatsApp
With too many conversations happening at once, orders slip through the cracks.
No customer control
Contracts, billing, and status updates are scattered across different tools.
Operational errors
Manual rework hurts execution speed and creates avoidable losses.
Fear of growth
Growing with manual control only increases operational chaos.
Shopify & E-commerce Services
End-to-end implementations for stores, integrations, and automation
Shopify and Integrations
Complete e-commerce structure with end-to-end implementations and automations.
Custom Shopify store builds focused on performance and conversion
Tailored storefront implementation aligned with your brand and UX
Integrations with payment gateways, logistics providers, and ERPs
Custom operational workflows for Shopify stores
Implementation and integration with catalog, checkout, and sales routines
Webhook setup and development for order and inventory synchronization
Catalog, pricing, and order automation via APIs and scripts
What the right service brings to your business
Build software and processes that increase revenue, reduce manual effort, and help your business grow with confidence.
More sales
Turn your digital experience into a conversion engine with clearer journeys and better product engagement.
Less manual work
Automate repetitive processes so your team can focus on delivering value rather than managing spreadsheets.
Better business operations
Simplify workflows and reduce friction with tools built for the way your business already works.
Faster growth
Get to market faster with scalable systems that support expansion without slowing you down.
Software built around your business
Custom solutions shaped around your needs instead of forcing your team to adapt to off-the-shelf products.
Seamless integrations
Connect payments, ERPs, CRMs and APIs to eliminate manual work and keep your data synchronized.
Main challenge
We restore control to growing companies.
Every project starts from a specific pain point: finance, sales, customer service, billing, metrics, automation, or an entire operation that needs to move beyond improvisation.
Assessment
We analyze your business, processes, current systems, pain points, and risks to identify root causes.
Priority
We define the most critical pain point to tackle first for maximum immediate impact.
First delivery
We build something functional quickly to build trust and give you back control of your operations.
Evolution
With proven value, the system grows with new layers and capabilities to meet your expanding needs.
Stuck with a broken MVP or abandoned codebase?
I audit, refactor, and rescue existing software projects—getting your app stable, performant, and back on track without starting from scratch.
Comprehensive Code Audit
Deep-dive analysis into your architecture, security vulnerabilities, dependencies, and performance bottlenecks.
Refactoring & Bug Elimination
Clean up spaghetti code, fix critical production crashes, and stabilize broken database queries or API routes.
Seamless Takeover & CI/CD
Transition maintenance seamlessly from past freelancers or agencies, establishing modern CI/CD deployment pipelines.
Tailored solutions
Not a spreadsheet. Not a generic platform full of tabs.
Option A
Spreadsheet
Useful to get started, but fragile once operations and demand increase.
Option B
Generic platform
Packed with features, but rarely aligned with your real day-to-day workflow.
MarceloSys
Built around your business
Your process is unique, so your software should be designed for the way you actually operate.
Answers to common questions about working together.
Every project is different, but most custom software projects take between 4 and 12 weeks depending on complexity, integrations and project scope. After our initial call, I'll provide a clear estimate and development roadmap.
Yes. I work remotely with businesses in Brazil and internationally. Communication happens through video calls, email and messaging, with regular progress updates throughout the project.
Yes. I build custom Shopify integrations including inventory synchronization, order automation, payment workflows, ERP integrations, webhooks and API-based automations tailored to your business.
Yes. In many cases, your existing ERP can remain in place while I build modern operational tools around it. This approach minimizes disruption while improving workflows and user experience.
Yes. I design and develop SaaS platforms from MVPs to production-ready products, including authentication, subscriptions, payment processing, admin dashboards and scalable cloud infrastructure.
Yes. I integrate popular payment providers such as Stripe, Mercado Pago, PayPal and other APIs depending on your business requirements.
Often, yes. Depending on your current website, I can integrate new business systems with your existing platform or rebuild only the parts that bring the most value to your business.
Project Rescue
Did your developer leave or did the project get stuck? We take over existing systems, fix problems, and continue development.
Schedule a discovery call
Tell me about your project and let's discuss how custom software can help your business automate operations, improve efficiency and grow.