A High Barrier to Entry is a Competitive Advantage: Why I Chose to Reset My Career in the AI Era

Sometimes we gather as many justifications as possible so that the decisions we make or wish to make feel rational. But at the end of the day, what truly matters is the concrete impact they create.

I am currently going through a career transition, and I realized that an earlier path I took was built on a mixture of what I enjoyed and what I needed at the time. Once what I needed was fulfilled, continuing on that trajectory no longer made sense.

Here is the story of my journey from Marketing to Software Development and the core lessons that brought me here.

The Answer Was Always There at the Beginning

Between ages 10 and 14, the computer was my primary haven. Beyond playing games and connecting with people, I was obsessed with understanding how everything worked behind the screen. I wanted to build my own worlds.

I discovered the MMORPG Tibia. In order to host an online public server and a registration web portal, I learned—long before I even knew the formal names for these concepts:

• Logic & Programming: The core engine was structured in C++, but custom gameplay behavior and scripts were implemented in Lua. I pieced this together by dissecting forum posts in Portuguese and English, translating tutorials as best as I could back in 2012.
• Databases & Infrastructure: To manage player accounts, I spun up local web servers using XAMPP and handled persistent data with MySQL. Initially intimidating, I realized that patience and systematic searching could solve virtually any technical roadblock. That was the spark for my ability to deconstruct complex workflows into clear inputs, steps, and solutions.
• Language Fluency: Because the gaming community and documentation were predominantly in English, I was pushed to understand the language. Through constant immersion, terminology became second nature, and I later formalized my training, reaching advanced English fluency.

Looking back, building test environments, worldbuilding, and solving real technical constraints from an early age shaped my deep appreciation for formal logic and the creative autonomy it unlocks.

The Value of the Journey

In high school, I completed a vocational technical program in Information Technology at ETEC. My performance reflected my early foundation: top marks across technical disciplines. More importantly, it was the period where I learned to express myself and collaborate without hesitation.

I launched a YouTube channel, mastered video editing, decoded audience analytics, and naturally gravitated toward the discipline that combined logic (translated as strategy) with creative execution: Marketing.

I loved the underlying ingredients, but not the final product.

I earned a degree in Marketing with a GPA above 9.0/10, landed an internship in my very first semester, worked at the leading regional firm in its sector, and later completed an MBA in Strategic Marketing. That chapter gave me high-value perspectives:

1. Business Acumen & Systems Planning: Understanding macro and micro business dynamics, the holistic function of marketing, and the discipline of data-driven planning.
2. Soft Skills & Collaborative Leadership: Overcoming communication barriers, building meaningful connections, and designing workflows that honor team strengths.
3. Execution & Data Synthesis: Hands-on mastery of audiovisual production, metric modeling, and performance analytics.

Even while excelling in marketing, technology remained my anchor. Whenever downtime permitted, I wrote automation scripts and built internal tools to streamline operations—until it became undeniable that my true calling was in software development.

The Turning Point

A persistent question kept resurfacing: “What if?”. The more I tried to push it aside, the louder it became. A threshold was crossed where staying on the existing path was no longer fulfilling. With the runway and resolve to pursue the work I truly loved, there was no reason to delay.

I committed to a full pivot into Technology. I acknowledged the prevailing industry anxieties—rapid advancements in Generative AI and heightened entry thresholds for early-career developers. However, the business acumen I gained in marketing offered a distinct perspective:

A high barrier to entry is the strongest competitive moat for those willing to do the hard work.

Today’s engineering ecosystem doesn’t just need developers who mechanically type syntax; it demands professionals who can bridge clean programming logic with business intelligence, product sense, and transparent communication. That exact intersection is where I position myself.

Next Steps

After seven years away from standard academic entrance exams, I placed 4th overall in the FATEC entrance examination for Systems Analysis and Development.

To arrive ahead of the curriculum, I immersed myself in Harvard’s CS50x (Introduction to Computer Science), adopting an active learning framework with foundational implementations in C and Python.

This portfolio and my technical logbook serve as my public build-in-public record. If you want to follow the engineering journey and project deep dives, feel free to connect with me here and on Instagram @lucasresendev.