2 min readfrom Data Science

Question for MLEs: How often are you writing your models from scratch in TF/PyTorch?

Our take

Navigating the world of machine learning can be daunting, especially when transitioning between roles and preparing for interviews. With eight years of experience in NLP and some exposure to vision modeling, you’re not alone in questioning how often others build models from scratch in frameworks like TensorFlow or PyTorch. Your background in developing MCP servers and prompt engineering highlights valuable skills, yet it’s common to feel gaps in neural network coding knowledge. Many practitioners often rely on existing models rather than starting from scratch.

I have about 8 years of experience mostly in the NLP space although i've done a little bit of vision modeling work. I was recently let go so I'm in the midst of interview prep hell. As i'm moving further along in the journey, i'm feeling i have some gaps modeling wise but I'm just trying to see how others are doing their work.

Most of my work the last year was around developing MCP servers/back end stuff for LLMs, context management, creating safety guardrails, prompt engineering, etc. My work before that was using some off the shelf models for image tasks, mostly using models I found on github via papers or pre-trained models on HuggingFace. And before that I spent most of my time around feature engineering/data prep and/or tuning hyperparamters on lighter weight models (think XGBoost for classification, or BERTopic for topic modeling).

I've certainly read books/seen code that involves hand-coding a transformer model from scratch but I've never actually needed to do something like this. Or when papers talk about early/late fusion layers or anything more complex than a few layers, I'd probably have to look up how to do it for a day or two before getting it going.

Am i the anomaly here? I feel like half my time has been doing DS work and the other half plain old engineering work, but people are expecting more NN coding knowledge than i have and frankly it feels bad, man. How often are y'all just looking for the latest and greatest model on UnSloth/HF instead of building it yourself?

Brought to you from the depths of unemployment depression....

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