Can You Explain The Ending Of Grokking The System Design Interview?

The HR manager slid a severance agreement across the table and said coldly, "You're fired." I froze. "Why?" Just one week ago, my boss had praised me in the company meeting and called me one of the team's most valuable people. The HR manager shrugged. "Ms. Lyttle, you're already 35. You don't have the energy of younger employees anymore, and you're not what you used to be. You no longer fit the company's future." I joined this company when I was 29. Over the past six years, I wrote countless lines of code and worked through more sleepless nights than I could remember. Every time the company faced a major system failure, I led the emergency response and saved it from catastrophic losses. And now they were telling me I was too old and too slow. I laughed in disbelief. "So you've already copied all my experience and skills into an AI, haven't you?" The HR manager paused for a moment before answering confidently, "AI never gets tired, never takes time off, and never asks for a raise. Once the company has an employee like that, why would we keep you?" I looked at her. "Are you sure the AI has learned everything I know?" She smiled. "Absolutely." The moment I heard that, I finally relaxed. Long ago, I had already hidden a trap inside my code to keep my skills from being copied. The moment their AI employee went live, the company would only have three days before everything fell apart.

I had been managing the company’s warehouse software for five years. Then the new manager came to me out of the blue, saying I didn’t understand frontline operations and that I was being fired. Looking at the five-thousand-dollar severance, I just nodded. “Fine.” He patted my shoulder after seeing me so compliant and started lecturing. “Young people should be out on the line, moving boxes! What’s the use of sitting in the office staring at data every day? “We’re a logistics company. Strength is what matters, not a tech geek like you!” I glanced at the high-end gaming computer in his office and obediently replied, “Yes, Mr. Fuller. Lesson received.” Maybe I had been too comfortable these past few years, and he thought I was dispensable. So, I handed over my ID badge and casually deleted all my personal login keys from my computer. Little did he know that the entire warehouse logistics, inventory management, and route planning software had been coded by me. I had let the company use it for free simply because the place was close to home and the work was easy. Now that I was gone, the system running on my personal cloud server was naturally inaccessible. Tens of thousands of items in the warehouse ground to a halt. As for any commercial software that could replace my system, a year’s subscription would cost exactly one thousand times my severance.

I'm the type who has the urge to overshare my life with him. It can be anything, be it the flowers blooming by the side of the road, the unpleasant coffee I end up having, or the sunset I've seen when I'm on my way home from work. Heck, when I think of Edwin Howell all of a sudden, I can't resist texting him at all. His replies are always short and perfunctory, though I suppose they count as a form of response from him. Hence, over the past six months, I've relied on these cold-sounding yet present replies to give me enough strength to deal with the engagement party, go wedding gown shopping, and choose the wedding venue all by myself. Somehow, I've managed to hang in there till the week before the wedding. But five days before the wedding, I discover an AI program that's installed within Edwin's computer. It can categorize every single sentence that I've sent to Edwin and extract the keywords. Then, it'll draft the most perfunctory responses that will never go wrong. If I miss Edwin, the AI will reply, "Mm-hmm." If I feel aggrieved, the AI will reply, "Got it." When I try to vent my frustrations to Edwin, the AI will reply, "Don't make such a big deal out of it." It turns out that Edwin isn't the one who has been responding to my need to overshare. The thing is, he has been texting another woman nonstop in another private chat. They talk about anything and everything under the sun, from exchanging simple good mornings and good nights to asking, "What are you having for lunch today?" and "Do you wanna go to the beach someday?" Finally, I realize that Edwin isn't the silent type who keeps his love in. If anything, he's the flashy type who will proclaim his love anywhere, anytime. It's just that… his love has never been mine to have. As for me, I've finally made up my mind to stop spending my life waiting for a response that will never come.

At the end of the year, the company made employees vote on who would be laid off. In front of the boss, the votes were read aloud one by one. Natalie Reed. One vote. Natalie. Two votes. Natalie... thirty votes. All thirty people on my team had voted me out. I clenched my fists and looked around at my coworkers. Every single one of them avoided my eyes. Maggie Turner was the oldest on the team. I knew she had to pick up her kid, so whenever she could not finish her work and had to rush to her kid’s school, I stayed behind and cleaned up after her. Dylan joined last year. He was losing sleep every night over money for his wedding. I squeezed time out of my own schedule, helped him complete his project, and got him a two-hundred-thousand-dollar bonus. And the trainee closest to me started trembling the moment I looked at her. She looked just as timid as she had when her hands shook and spilled wine all over a client. Back then, to fix the mess for her, I apologized to the client and drank until I had a stomach hemorrhage. Only then did she pass probation. I could not help feeling hurt. The boss looked at the result and asked if I had anything to say. I took a deep breath and asked everyone on the team, “Why did you vote for me?” My timid trainee suddenly found her courage. “Because you always pretend to help people, then steal our credit.” “Otherwise, how could someone as useless as you become the top salesperson?” I laughed, took off my employee badge, and placed it on the table. A week later, my boss was kneeling outside my door, begging me, the so-called useless one, to come back to the company.

On the day Clara forced me to sign the divorce papers, I got bound to a self-sabotaging system. The system commanded me to slap her hard and tell her to get lost. I trembled in fear because Clara was a ruthless person. If I dared to stop her from getting back together with the love of her life, she would utterly destroy me. But the system threatened me: "If you don't self-sabotage, you will die soon." Left with no choice, I slapped her. As soon as I hit her, I ran out of the house, terrified. The system then told me to smash a police car on the side of the road. I suspected the system wanted me dead. However, after I smashed the police car's side view mirror, I realized that the system was trying to sabotage someone else's life instead.

At the annual company banquet, the boss had the tables and chairs from the logistics department removed, leaving only a stainless steel dog bowl in the center of the stage. "Logistics is just the company's watchdog," he said coldly. "Since when do watchdogs sit at the table and eat?" The top sales champion laughed as he dumped leftovers into the bowl. The boss casually slipped a black garbage bag over my shoulders. "From now on, you're the company's living trash can. Catch it properly." Laughter erupted across the room. Amid the jeers, I silently tightened my grip on the universal access card in my hand. What they didn't know was that the building's special approvals for water and electricity—and all its property management connections—were maintained by this very "dog face" of mine. I tossed my ID badge into the dog bowl and turned to leave. Let's see how long you last once the new year passes—without logistics there to hold everything together.