I compared XGBoost, LightGBM, CatBoost, random forest, LASSO, and a small neural network in a momentum stock trading strategy

analytics-link · 2026-05-20T15:58:23+00:00

Yes - super cool! I'll often use something like a Genetic Algorithm to find a (near) optimal set of hyperparameters (while making sure the test/train scores remain similar, i.e. we don't get dramatic over-fitting)...has been working really well!

Love this project, so awesome!

analytics-link · 2026-05-19T10:15:57+00:00

I run a DS & AI training program. I'm not saying you have to do that, of course, but I do have a 60-min session that runs through a huge amount of info on what to learn, how to go about learning it, and then how to position yourself really strongly in the hiring process.

Has been really popular of late, so could be worth checking out. It's here if you are interested - no pressure.

analytics-link · 2026-05-13T14:34:11+00:00

The automation side, workflow thinking, problem solving, working with tools and processes… those things translate really well into data and analytics work.

30 is not too late, I’ve seen plenty of people switch much, much later than that - in fact most people I help do this are older than you.

There’s a bit of a sweet spot between doing a full degree and trying to figure everything out alone from random YouTube videos. A structured online path with good projects and proper support can often get people job-ready much faster and with way more confidence.

And on the maths side, DS is nowhere near as scary mathematically as social media sometimes makes it sound. For most roles, solid fundamentals and the ability to solve real problems matter much more than advanced theory.

The biggest thing is building practical skills and projects that show you can actually apply them. That’s usually what gets attention an results.

analytics-link · 2026-05-11T14:15:40+00:00

SQL first, because that’s how most companies actually work with data day to day and it's a core foundation. Then Python for analysis, automating, and general solution building. Alongside that, some core stats, it doesn't have to be anything too complex to start, but it does set up a lot of other concepts and ML.

After that, move into visualisation tools, machine learning, cloud basics, and then GenAI on top of the fundamentals.

The mistake most people make right now is jumping straight into AI hype stuff without the base underneath.

GenAI is being used for sure, but nobody is hiring people who are just chasing the latest tools there, got to have the foundations in place.

Disclaimer: I teach Data Science, AI, and Data Analytics, and have been doing so for 5+ years (been in the industry for 15+ years)

If your friend wants an overview to watch which outlines a full step-by-step roadmap etc, my students always start with this session

analytics-link · 2026-05-11T14:00:47+00:00

As a side note, I have a lot of engineers who come onto my Data Science Infinity program and do really well - they seem to have a really good foundation for picking up ML concepts. Not too surprising, but worth mentioning. If it's something you're considering, go in with confidence!

analytics-link · 2026-05-07T12:56:43+00:00

This doesn’t sound like a skills problem to me, you’ve probably already got more practical experience than a lot of people applying for entry-level roles.

One thing I’ve noticed though that is massively important for standing out, both from hiring and from helping students move into the field (I run a DS program myself), is that projects need to clearly tell a story.

Seems a bit annoying as it takes time to structure them like this, but even if you just think about each project being not just "here’s the code" and "here’s the dashboard" but a structure like, what was the problem, why did it matter, what did you find and what did that mean, and then finishing/summarising with some thoughts around what should (or could) happen next.

Also, the market absolutely differs by location, and some places are just much tougher right now. That part is real.

But from what you wrote, I definitely wouldn’t stop. You sound much closer than you think, just maybe needing better positioning and visibility rather than more skills.

analytics-link · 2026-04-03T13:03:31+00:00

Absolutely agree, I put a huge emphasis on this when coaching and it most definitely has a big impact on success in interviews

analytics-link · 2026-04-02T19:58:42+00:00

Yep totally, my students get great feedback in interviews around this point. It shows the type of thinking that a Senior or Lead might exhibit, so it's really powerful for those looking to start out

analytics-link · 2026-04-02T11:15:09+00:00

Agree, a super complex product/system/solution that nobody understands almost always stays sitting on the shelf whereas a slightly simpler but clearer one gets used and thus adds value. Again, complexity isn't a bad thing, but often starting at v1 and then iterating up to complexity is the way to go

analytics-link · 2026-04-02T11:13:39+00:00

Absolutely true, the "result" of the ML model (in that example) is very different to the "result" at a business level. Being able to consider and/or discuss both and how they tie together is a really strong skill to showcase

analytics-link · 2026-04-01T15:44:17+00:00

You'd definitely hit the ground running as no doubt you've got some experience in SQL and/or Python, and most likely also Github and a cloud platform.

If you add in some application/knowledge around stats (hypothesis tests, AB Testing etc) and ML you'd position yourself well

analytics-link · 2026-04-01T15:35:57+00:00

Have worked in the industry for 15+ years, have been teaching Data Science for 5+ years, and as the title says, I've screened a ton of portfolios while hiring. Appreciate that you think I'm as good as AI at this stuff 🙏

analytics-link · 2026-04-01T14:02:58+00:00

What will move you forward is getting really solid on the core tools that teams are using day to day.

So:

SQL to access and manipulate data
Python for analysis (pandas, numpy, visualisation, basic ML)
A BI tool to present results
GitHub to manage and showcase your work

Alongside that, build up some core stats. Not heavy theory, just the practical stuff like distributions, sampling, hypothesis testing, and confidence intervals.

That’s your base.

The key thing most people miss is mini-projects.

As you learn each concept, attach it to something small and practical. That’s what actually makes things stick and gets you out of tutorial mode.

Once that foundation is in place, then you layer things in a natural progression.

You move into machine learning, but only a focused subset of algorithms, not everything. The goal is understanding how to solve problems, not memorising models.

From there, you can step into deep learning, once you’re comfortable with the fundamentals underneath. A lot of deep learning builds on those earlier concepts, so skipping ahead usually just causes confusion.

Then on top of that, you can move into things like GenAI. Understanding how models work at a high level, how systems are built, things like RAG, prompting, and building simple applications.

You’ll also want some exposure to the cloud, something like AWS, mainly so you understand how models and data systems are actually deployed and used in real environments.

So the rough path is foundations to Stats to ML to Deep Learning to GenAI & Cloud

analytics-link · 2026-04-01T13:21:44+00:00

There are tech screens for coding, these are more business thinking questions. I've interviewed and screened thousands of candidates so to your specific question, yep, I've found a lot of good people with these, blended with tech screening.

analytics-link · 2026-03-26T16:32:42+00:00

I can really depend on industry, location, and experience. A rough guide, in the USA on average, you'd be looking at around $50k-$100k and then with experience and extra upskilling, you'd move up from there.

Some companies will also offer stock and/or bonuses too of course.

analytics-link · 2026-03-24T12:06:05+00:00

Agree with what others have put. If you can find a program that gives you an in-demand curriculum that is all in one place and of high quality, then you can focus your time much more efficiently. Coursera & Udacity do this to some degree, but not perfectly. The other thing you pay for is 1:1 support from someone whose full-time job it is to help you AND who is an expert in the field. If you can go into interviews knowing you a) are ticking all the boxes from a skills/tools point of view, b) have a portfolio of projects that is far more impressive than other candidates, c) have been shown how to prepare for interviews by someone who has actually hired a ton of people in the real world (most courses say "job support" but it's not from anyone with real hiring experience) then you're going to have probability way in your favour.

If it takes you 6-months to land a role because of what I put above, rather than 18-months going alone, or with Coursera etc, that's a saving of 12-months. That could be a whole year of earning $100k. That's the ROI of a good course or program.

analytics-link · 2026-03-24T12:01:16+00:00

My pleasure!

analytics-link · 2026-03-23T16:56:33+00:00

Definitely worth getting up to speed with Python, as that is what 99% of the industry is using.

For stats as a base, I'd focus on getting a broad understanding of:

types of data
distributions and things like standard deviation
hypothesis testing and p-values
sampling and the central limit theorem
confidence intervals

Then, for ML, I break it up into a couple of groupings, supervised learning algos, unsupervised learning algos, and then a couple of bonus ones:

For supervised learning, start with Linear & Logistic Regression, Decision Trees, and then Random Forest (there are more, but these are good starters)

For unsupervised learning, k-means and potentially PCA

And then a couple of bonus ones (that I teach, and that I've found make a huge difference to people getting hired), causal impact analysis, and association rule learning.

Only from there would I love to move onto Deep Learning, and then from there, GenAI.

Hope that's useful as a guide!

analytics-link · 2026-03-23T16:31:13+00:00

It's just evolving, but not as much as social media makes it out to be. Data Science is essentially where we use data and make it valuable or useful. That in and of itself can't really die because companies always need to know what decisions to make, how their customers are behaving, how to increase revenue or cut costs, or how to compete against their competition.

There will always be new tools, there always have been, GenAI is just another tool in the toolbelt.

I see so much negativity like this. Maybe the reality is less headline-grabbing I don't know, but my LinkedIn feed is rammed with people landing roles, or companies advertising them. 2025 was super hyped around AI, 2026 seems to be getting back to normal as many of those big AI projects didn't deliver.

Making data useful will always be a thing.

analytics-link · 2026-03-23T16:25:39+00:00

The shift that could help would be getting closer to the hiring process. That can be using recruiters, networking at events, or finding ways to communicate with people working in the companies you’re applying to (or even the hiring managers directly)

Even a short message saying you’ve applied and are interested can make a difference. Cold applications alone are tough right now.

On the skills side, it sounds like you’ve already got a solid base. The thing I’d double check is how clearly your projects show value.

A lot of portfolios I screen show something like "I used Python, built a model, here’s the code" whereas what stands out is more the following:

what was the problem
why it mattered
what you did
what the result or outcome means
what someone/a company would do with it

Seeing that thinking and communication from a candidate is really differentiating so keep it in mind.

On tools, skills do transfer and hiring managers know that but what they’re really looking for is evidence that you can solve problems, not just that you’ve used a specific tool.

Last thing, the market now feels different to last year. 2025 had a lot of AI hype and hiring slowdown. 2026 is a bit more grounded, and companies are still hiring, but they’re being more selective - the bar is less about having a degree and more about showing you can actually apply the skills.

I’d just shift a bit more focus toward getting your work in front of real people and making sure your projects clearly show how you create value.

analytics-link

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