AFS IT Services · São Paulo, Brazil
Custom apps, web systems and automation to get your operation off spreadsheets and make your systems talk to each other. Behind it: Alexandre Fernandes da Silva, 20 years of software engineering — including Mercado Libre and BNP Paribas.
Reply within 1 business day · No-commitment first conversation
Experience built at
Where I've worked
Brands that used my work
Across fintech, retail, biometrics and logistics.
From the first sketch to a product in production, I handle the whole cycle — and stay close after launch.
Management systems, process automation and internal tools built for your operation — for when off-the-shelf software doesn't cut it. I've replaced manual controls with systems that gave teams their hours back.
Best for: operations still running on spreadsheets and manual controls.
From admin dashboards to full SaaS platforms: browser-based systems built to grow with your business. Real-world experience with tracking platforms, sales-force tools and ERPs.
Best for: companies that need a dashboard, portal or SaaS product.
Android and iOS apps from concept to release — including complex cases like biometric facial recognition and B2B apps used by field teams of major brands.
Best for: businesses that need to be in their customers' or field teams' pockets.
I connect systems that don't share information today — ERP, e-commerce, spreadsheets, apps — eliminating re-typing, rework and processes that stall. The quality bar comes from Mercado Libre, where connected systems move real money.
Best for: companies where the same information gets typed in more than once.
Support for companies and teams: architecture design, project reviews, technology decisions and unblocking technical problems — with the hands-on experience of someone who has solved these problems in large-scale systems.
Best for: teams that need senior judgment to decide with confidence.
More than two decades solving real problems with software — from startups to mission-critical operations.
First-Party Profitability team: pricing systems with direct impact on the company's financial results. Clean Architecture, messaging in distributed systems and observability work that mitigated incidents with direct financial-loss potential.
Facial recognition and liveness-detection apps for the financial and pension sectors, integrated with government validation (SERPRO) and DocuSign — security and usability in critical workflows.
Maintenance of critical systems behind mandatory financial reports to the Brazilian Central Bank — regulatory compliance and operational stability in a banking environment.
Customization and rollout of a white-label sales-force app for companies such as TIM, Unilever, Vigor and Premier Pet — direct client work, from requirements to production rollout.
Eight years as an entrepreneur: own products for vehicle tracking, sales-force enablement and on-demand ERPs. From sales prospecting to support — a complete view of product, business and client.
ERPs from scratch, public-transport electronic ticketing, GPS hardware integration and field support in large call centers — the technical foundation of someone who learned by solving real problems.
A simple, transparent process — no layers between the person who understands the problem and the person writing the code.
Before talking technology, I understand your problem, your business and what success means to you.
You get a clear proposal: scope, timeline and cost — no jargon and no surprises halfway through.
Development with frequent deliveries: you watch the product take shape and validate every step.
After launch I stay close: maintenance, improvements and evolution as the product grows.
Scope, timeline and price defined before we start. Ideal for building a product or system from scratch.
Dedicated hours per month for maintenance, improvements and new features on an existing system.
Architecture, project review or technical unblocking — short engagement, objective outcome.
Three real situations from my career — the kind of problem I know how to get out of your way.
Field teams
White-label app customized and rolled out for field teams at TIM, Unilever, Vigor and Premier Pet — working every day, in the sun, on unstable connections.
Mission critical
Profitability backend at Mercado Libre, with observability that helped prevent direct financial-loss incidents.
Security
Facial recognition and liveness detection integrated with government validation (SERPRO) and DocuSign, in apps for banks and pension funds.
I'm a software engineer with over 20 years in the field and the founder of AFS IT Services. I've worked in highly demanding environments — from Mercado Libre's pricing backend to BNP Paribas' regulatory systems — and also on the other side of the counter: I co-founded and ran a software house for eight years, handling proposals, delivery and support.
That combination defines how I work today: serious engineering — automated testing, monitoring and code other people can maintain — with a business-owner mindset. The person who understands your problem is the same person designing the solution and writing the code — direct communication and end-to-end ownership.
São Paulo, Brazil · Working remotely with clients worldwide
Mobile apps, web systems, custom software, system integrations and architecture consulting. I work both with companies building a product from scratch and with teams that need senior technical reinforcement on an existing system.
We start with a no-commitment conversation so I can understand the problem. You then receive a proposal with defined scope, timeline and cost — in one of three formats: fixed-scope project, monthly retainer or one-off consulting. Typical projects range from a few weeks (a focused automation) to a few months (a complete product), and for larger projects I work in staged deliveries to reduce risk on both sides.
Yes. I work fully remotely in Portuguese and English, with experience in distributed teams and international projects.
No. I offer ongoing maintenance and evolution — most of my projects stay with me after launch. Good software is software that keeps working and growing with the business.
Technology choice comes after the problem, not before. I have depth in backend (Java/Spring Boot, PHP, .NET), mobile (Android/Kotlin), web and relational databases — and I use whatever fits your case, including AI-powered solutions.
Tell me what you need — I reply within one business day.