Reddit Experience · Feb 2026

LLNL Final Panel (Full Stack) – Not Sure What to Expect

Data Science System Design Hard
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Interview Experience

so its that time that it takes to finally come and excited its been years i have been applying to LLNL and finally got reached back out stating I am pleased to inform you that you have been identified

Full Details

so its that time that it takes to finally come and excited its been years i have been applying to LLNL and finally got reached back out stating I am pleased to inform you that you have been identified as one of our top candidates for the Full Stack Software Developer position that got me kinda happy but i know theres no guranttee kinda have high anxiety right now and have the panel scheduled out some time soon with 5 panels [project tech team, project management team, full stack development, and DS/AI teams] dont know what to expect and would love if the community could ping me and tell me what to expect and some words of encouragement this is not like the standard consumer FANG roles so i dont even know where to start at and everything is just kinda vague. do they send this generic emails to everyone with COI(persnoal relation and Governement realtion) how many finalist make it to this am i just one in the numbers? what should i prep for and be ready for? and what if i dont do my best and get rejected hard to figure out what they may ask when theres no info out there and this timeline process was way diffrent from the others and apparently mine went faster than expected cant tell So it’s finally that time. I’ve been applying to LLNL for years. Finally got an email saying: > That definitely made me happy. But I also know there’s no guarantee, so now I’m sitting here with high anxiety. I have a final panel coming up soon with multiple groups: * Project Tech Team * Project Management Team * Full Stack Development Team * DS/AI Team This isn’t like a standard FAANG interview where there’s tons of info online. Everything about this process has felt different. The timeline moved faster than I expected. It’s also a national lab role, so I don’t really know what angle they’ll come from. A few things I’m honestly wondering: * Do they send the “top candidate” email to multiple finalists? * Is the COI form (personal relationships / government affiliations) just standard for everyone at this stage? * How many people typically make it to this panel round? * What should I actually be prepping for? * Architecture? * System design? * Mission-focused discussions? * Deep coding? * AI/data pipeline stuff? * What does a DS/AI panel usually dig into for a full stack role? * Am I overthinking this? I really want this role. I don’t want to walk in underprepared just because there’s not much info out there. At the same time, I’m trying not to psych myself out. If anyone’s interviewed at LLNL towards the Full stack dev or SWE , I’d appreciate insight. Even just perspective on how to approach this mentally. Thanks.

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Stack Queue System Design