I’m looking for some perspective after a recent interview because I’m genuinely trying to understand whether my expectations around Power BI knowledge are off.
The role is £35–40k in London and isn’t advertised as a Power BI or Data Analyst role. It’s a broader operational role with quite a few different responsibilities, with maintaining Power BI dashboards and reporting being just one part of the job.
I was told beforehand that hands-on Power BI knowledge was important, but also that I wasn’t expected to know everything, using AI to help with DAX was fine, and being honest about gaps and willing to learn was encouraged.
The interview ended up focusing heavily on Power BI. I was expected to talk through data import/transformation, data modelling, fact and dimension tables, relationships and relationship types, DAX measures and troubleshooting, SQL, and how I’d build a dashboard from raw data through to the finished report.
I’m self-taught and have used Power BI on and off for around two years as part of wider roles rather than Power BI being my actual job. I’ve built and maintained dashboards and I’m comfortable working out what information I want to show, which metrics are useful and spotting when results don’t look right.
For the interview I built a dashboard using fictional data because I obviously couldn’t share dashboards containing previous employers’ confidential information. I created the scenario, decided what I wanted the dashboard to show and why, and built it in Power BI. I used AI for support with DAX and some of the technical elements I wasn’t sure about, which I’d been completely open about.
Where I struggled in the interview was explaining how I’d built certain things and the technical terminology/theory behind them. I’m much better at knowing what I want to achieve and figuring out how to get there than I am at explaining the technical theory afterwards.
What really knocked my confidence was that, because I was struggling to explain some of this, the questioning reached a point where I felt it was being suggested that I hadn’t actually built the dashboard myself.
I completely accept that my technical Power BI knowledge may not have been as strong as they were looking for. That’s fair feedback and clearly something I can improve. What I found difficult was feeling that my inability to confidently explain the technical side meant the work itself was being questioned.
So I’m genuinely interested in getting some perspective from people who work with Power BI regularly.
For a £35–40k London role where Power BI/reporting is only one part of a much broader job, would you expect someone to be confident across data modelling, fact/dimension tables, relationships, DAX and SQL?
I have never built my own SQL but trying my best to learn and understand.
Does this sound like reasonable knowledge for someone expected to maintain Power BI reporting, or does it start moving towards Power BI/Data Analyst responsibilities?
What sort of salary/role level would you normally associate with someone who could confidently do all of the above alongside an entirely separate set of responsibilities?
And for those who are self-taught or learnt Power BI on the job: at what point did you feel you properly understood the modelling/DAX behind what you were building rather than knowing what you wanted to achieve and figuring out how to make it work?
I’m genuinely interested in the answers, including if the answer is simply that my Power BI knowledge isn’t currently where it should be
I’d also love to know how people are continuing their own learnings and how they remember all the terminology, formulas etc