From Intern to Team Lead: 10 Years of Full Stack Engineering

In 2012, I walked into the TV8 offices in Istanbul as a wide-eyed intern who barely knew the difference between a frontend and a backend. Today, more than a decade later, I lead engineering teams, architect complex systems, and mentor the next generation of developers. This is the story of that journey -- not a highlight reel, but an honest account of the decisions, detours, and turning points that shaped my career.

The Intern Years: TV8 and First Impressions (2012)

My first professional experience was a summer internship at TV8, one of Turkey's major television networks. I was assigned to the IT department, where my primary job was to help maintain internal web applications. The tech stack was ancient by today's standards -- classic ASP pages, SQL Server databases, and Internet Explorer as the only supported browser.

But I learned something invaluable that summer: production systems are messy. The code I saw at TV8 was nothing like the clean examples from my university courses. It had years of accumulated patches, undocumented features, and workarounds for bugs that nobody remembered. That messiness taught me to read code carefully, to understand context before making changes, and to respect the complexity of systems that actually serve users.

Smartpro: Getting Serious About Development

After TV8, I moved to Smartpro, where I started working on commercial software projects. This was my first real exposure to structured software development -- version control, code reviews, sprint planning, and deployment procedures.

At Smartpro, I cut my teeth on .NET development, building enterprise applications with C# and SQL Server. The work was not glamorous, but it was foundational. I learned about database design, API architecture, and the importance of writing code that other people could understand and maintain.

ISG Kurumsal: Four Years of Growth (2015-2019)

ISG Kurumsal was where I truly grew into a full-stack developer. Over four years, I worked on increasingly complex projects, gradually taking on more responsibility and ownership.

The early projects were straightforward CRUD applications, but as I gained confidence, I started pushing for better architecture and more modern tools. I introduced React to the team's frontend toolkit, moving away from jQuery-based interfaces. I advocated for RESTful API design and helped establish coding standards that improved code quality across the team.

One project that stands out was a large-scale enterprise resource planning (ERP) system. I was responsible for the entire technical architecture -- database schema design, API layer, frontend application, and deployment pipeline. It was the first time I experienced the full weight of architectural decisions: choices made in the first sprint would echo through months of development.

The biggest lesson from ISG was about technical debt. I watched projects accumulate shortcuts and compromises that eventually slowed development to a crawl. I learned to push back on unrealistic deadlines when the cost was architectural integrity, and to communicate technical trade-offs in business terms that stakeholders could understand.

MNG Airlines: A Brief but Valuable Detour

Between positions, I did an internship at MNG Airlines, which exposed me to a completely different domain. Aviation systems have strict reliability requirements, and the development practices reflected that: rigorous testing, extensive documentation, and careful change management.

Working in aviation reinforced my growing belief that software quality is not a luxury -- it is a responsibility. When systems handle critical operations, "it works on my machine" is not an acceptable standard.

Makdos and the Entrepreneurial Leap (2020-2023)

In 2020, I took the biggest leap of my career by building Makdos, a hosting platform, essentially from scratch. This was not just a technical challenge; it was a business challenge. I had to make product decisions, manage customer relationships, handle billing, and keep infrastructure running 24/7.

The technical skills I had accumulated over the previous eight years were necessary but not sufficient. Building a hosting platform required system administration skills, network engineering knowledge, and an understanding of security that went far beyond application-level concerns.

Makdos grew to serve 500 to 1,000 customers and generated roughly half a million dollars in annual revenue. More importantly, it taught me that building software is only half the equation. Operating software -- keeping it running, scaling it, supporting users, and evolving it based on feedback -- is the other half.

POMETOP: Learning to Lead (2020-2025)

Overlapping with Makdos, I took on the role of team lead at POMETOP, where I managed a team of eight-plus engineers. This was my first formal leadership position, and it fundamentally changed how I thought about my work.

As an individual contributor, my impact was limited to the code I could write. As a team lead, my impact was multiplied through the team. But multiplication works both ways -- a good decision helped eight people, and a bad decision slowed eight people down.

I learned that leadership in engineering is not about having the best technical answers. It is about creating an environment where the team can do their best work. That meant clear requirements, realistic timelines, constructive code reviews, and the psychological safety to admit mistakes and ask questions.

One of my proudest achievements at POMETOP was building a culture of ownership. Each engineer owned specific features or services end-to-end, from design through deployment and monitoring. This ownership model improved both code quality and job satisfaction -- people care more about systems they are personally responsible for.

GoIT: The Teaching Chapter (2025)

In 2025, I became an instructor at GoIT, teaching React and .NET to aspiring developers. Teaching forced me to articulate concepts that I had internalized to the point of unconscious competence. Explaining why we use useEffect, or when to choose SQL over NoSQL, or how to design a RESTful API -- these explanations sharpened my own understanding.

Teaching also gave me perspective on how the industry has evolved. The tools and frameworks have changed dramatically since my intern days, but the fundamental challenges remain the same: understanding requirements, managing complexity, and writing code that is both correct and maintainable.

Digiturk: The Current Chapter (2023-Present)

Today, I am a senior full-stack engineer at Digiturk, one of Turkey's leading digital media companies. I lead a team of five engineers working on systems that serve millions of users. The scale and complexity are significant, and every day brings new challenges.

At the same time, I continue freelancing through Yazilimci Bul, the developer marketplace I built. Balancing a full-time role with freelance work requires discipline, but it keeps my skills sharp across different domains and tech stacks.

What I Have Learned

Ten years of full-stack engineering have taught me that the most important skills are not technical. Communication, empathy, patience, and the ability to learn continuously matter more than any specific framework or language.

Technologies come and go. I have worked with classic ASP, .NET, React, Node.js, Python, and dozens of other tools. The common thread is not the technology but the principles: write clean code, test your assumptions, design for change, and always consider the humans who will use and maintain your systems.

If I could give one piece of advice to the intern I was in 2012, it would be this: invest in understanding systems, not just writing code. The developers who thrive long-term are the ones who understand how all the pieces fit together -- from the database to the browser, from the deployment pipeline to the monitoring dashboard. That holistic understanding is what separates a coder from an engineer.