7y
While this was a while ago it's nevertheless disappointing to read and I'm sorry you didn't receive feedback following your task.
We have a strong culture of feedback and intentionally make sure to provide constructive feedback to all candidates who complete a task with us and feedback at every stage of the process.
Unfortunately, when partnering with agencies we're not always in control of what feedback is passed along, but, we are mindful of this when choosing which agencies we work with and have stopped working with agencies for this reason, too.
As an aside to this, I wanted to also share that the tasks we ask candidates to complete, is actually used again in the final round where we complete a pair programming exercise together.
We recognise that interviews can feel artificial and being familiar with the piece of code (i.e. code you've written) we feel gives you the best chance to demonstrate your skills, how you work and equally gives you the best opportunity to get a feel for what it's like working with our team.