, my first reaction is that this is a good thing! You showed initiative in getting a part-time role, performed well, and it led to a new exciting opportunity. I would account for that part-time role on your resume (maybe just list it as a separate position with dates that overlap your prior full-time job?). And then yes, I really like the idea of having your recommender explain the long working relationship. I would also try to communicate (likely through your career focused essays) why you pursued this part-time opportunity (since it is a less common arrangement) so they can see your enthusiasm/passion and how it related to your long-term goals. I think if you can do those things, you shouldn't have issues with this.
I've had a full-time job for about 2 years at a Fortune10 company as an IT engineer. Alongside, I also worked part-time (~15 hours a week) for a startup as a iOS developer for as long.
Having played a key role in the startup getting funded, I've now moved to the startup full-time as a iOS Team lead (leading a team of 5), a position that I got only due to my long-standing working relationship with them and a deep understanding of the product. I want the adcoms to be aware of this fact through my essays and resume since this also aligns well with my long term goal of product management.
So I was wondering, how would the adcoms perceive this whole deal of working part-time for a startup at the same time as when I held a FT job at the fortune10 company? Could this potentially work against me?
Just looking for opinions or suggestions on how best to handle this, appreciate any help!
PS: Also, the founder of the startup will write a recommendation letter for me and I've been thinking of asking him to make a mention of the fact that I've worked with them in some capacity for 2+ years and not just the 3 months I'll technically have as an FTE at the time of application. Because 3 months may give the impression that they don't know me well while in reality, they do. Any comments about this?