Building with Existing AI Models: How I Delivered Business Value Without Research Experience


Zen van Riel - Senior AI Engineer

Zen van Riel - Senior AI Engineer

Senior AI Engineer & Teacher

As an expert in Artificial Intelligence, specializing in LLMs, I love to teach others AI engineering best practices. With real experience in the field working at GitHub, I aim to teach you how to be successful with AI from concept to production.

When I first entered the AI space at 20 years old, I faced what seemed like an insurmountable obstacle: I didn’t have a Ph.D. or extensive machine learning research experience. Yet within four years, I had built AI systems used by thousands and secured a Senior AI Engineer position at a big tech company. The secret? I focused on building with existing AI models rather than creating new ones. This implementation-focused approach not only accelerated my career but delivered immediate business value—something I’ve found many companies desperately need.

The Implementation Gap in AI Development

Most AI discussions focus on groundbreaking research and new model development. However, as I discovered early in my career, there’s a massive implementation gap in the industry. Organizations have access to powerful AI models but lack engineers who can effectively implement them to solve real business problems.

This gap created my opportunity. Instead of competing with researchers with advanced degrees, I positioned myself as an AI application engineer who could bridge the divide between cutting-edge models and practical business solutions. This focus on implementation rather than research is what allowed me to progress from beginner to senior engineer in just four years.

Leveraging Existing Models for Maximum Impact

My approach to AI development centers on one principle: you don’t need to create models to create value. Here’s how I’ve successfully built impactful AI applications using existing models:

1. Understanding Business Problems First

Before touching any AI technology, I always start by deeply understanding the business problem. This business-first approach ensured I selected the right models for the right purposes rather than trying to force an inappropriate solution.

For instance, during one project, rather than suggesting we build a custom model (which would have taken months), I identified that an existing language model with careful prompt engineering could solve 80% of the requirements in a fraction of the time. This ability to match business needs with available models is a cornerstone of practical AI implementation.

2. Model Integration and Adaptation

The real skill in AI application development isn’t creating models—it’s integrating them effectively into existing systems. I developed expertise in taking open-source and commercial models and adapting them to specific use cases.

This integration often involves creating custom data pipelines, building effective prompting strategies, and designing systems that handle the unique challenges of AI components—like latency management and fallback mechanisms when models don’t perform as expected.

The AI Solutions Architecture Approach

What set my career trajectory apart was my focus on becoming an AI solutions architect rather than just an AI developer. This approach involved several key components:

1. End-to-End System Design

I approached AI projects holistically, designing complete systems rather than just the model component. This meant considering everything from data ingestion to user experience, ensuring the AI elements integrated seamlessly with traditional software components.

This system-level thinking is surprisingly rare in the AI space, where many practitioners focus exclusively on model performance rather than overall solution effectiveness.

2. Practical Production Considerations

A significant portion of my value came from understanding production concerns that many AI developers overlook—things like monitoring model performance in production, managing data drift, and ensuring reliability when scaling to thousands of users.

These practical considerations often make the difference between AI projects that deliver real value versus those that remain interesting experiments but never reach production.

Building an AI Developer Portfolio Without Research

One question I frequently receive is how to build an impressive AI portfolio without a research background. Based on my experience, here’s what worked:

Rather than trying to create novel algorithms, I focused on building complete applications that solved real problems using existing models. These projects demonstrated my ability to deliver value, which is ultimately what companies care about.

For example, one of my early portfolio projects used an open-source language model to create a document processing system. While the model itself wasn’t groundbreaking, the complete solution addressed a real business need and showcased my implementation skills.

This portfolio approach—focused on complete solutions rather than model innovations—proved far more effective at landing interviews and job offers than academic projects would have been.

The Career Impact of Implementation Focus

By positioning myself as an AI application engineer rather than an AI researcher, I opened doors that would have otherwise remained closed. Companies were less concerned with my academic credentials and more interested in my ability to build functioning systems that delivered business results.

This implementation-focused approach enabled me to progress through roles rapidly: from junior positions to a senior engineer at a major tech company in just four years, with a corresponding tripling of my income.

What’s even more valuable is the future-proofing this career path provides. While specific models will continue to evolve, the need for engineers who can implement AI solutions will only grow. By focusing on implementation skills, I’ve positioned myself for long-term career success regardless of which models dominate the market.

Conclusion: The Builder’s Advantage in AI

My journey demonstrates that you don’t need to be a researcher to have a successful, high-impact career in artificial intelligence. By focusing on building with existing models rather than creating new ones, you can deliver immediate business value while developing a skill set that’s in extraordinarily high demand.

This builder’s approach to AI—focused on implementation rather than research—offers a more accessible and often more lucrative path into the field. It allowed me to compress a decade-long career progression into just four years, and it could do the same for you.

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