Can You Explain The Ending Of System Design Interview An Insider'S Guide?

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.

The new intern always claimed to have the company’s best interests at heart, but her actions told a different story. To cut costs, she secretly swapped the two-thousand-dollar gift basket I had prepared for a client with a knockoff version she bought online for just two dollars, shipping included. During a critical overtime session, she turned off the power to save on electricity. Then, she boldly suggested canceling the company’s annual holiday leave. With a self-righteous expression, she declared, “The company doesn’t support freeloaders. I believe the holiday season is the perfect time to boost sales. I propose everyone work unpaid overtime and dedicate themselves selflessly to the company!” While the employees grumbled in frustration, I stepped up to refute her absurd suggestion and spoke out on behalf of the team. But instead of backing down, she accused me of embezzlement in front of everyone and recommended to the boss that I be fired. The shocking part? The boss agreed. Fine. If that was how they wanted it, I couldn’t wait to see how the company would function without me.

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.

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.

The college entrance exam began, and I waited nervously for the papers to be handed out. Just as I was about to take the test paper from the invigilator, a floating line of text suddenly drifted across my vision. [Don't take it. The paper is coated with deadly poison. You'll die the moment you touch it.] Before my mind could even process what was happening, pure survival instinct made my hand jerk back. The paper slipped from my grasp and fell to the ground. I stiffly met with the invigilator's lifeless, mechanical eyes. He stared at me without blinking, then slowly bent down, picked up the test paper, flipped it over, and placed it back on my desk. "Good luck on your exam." His cold voice snapped me out of the fear brought on by that strange message. Just as I was starting to think that it was nothing more than nerves playing tricks on my eyes, the exam hall speakers started playing instructions. "The listening test will now begin. Please mark your answers on the corresponding answer sheet. The papers will be collected in 15 minutes. Anyone who fails to submit on time will be eliminated!" A wave of terror instantly overwhelmed me.

At the company's year-end awards ceremony, just as it is supposed to be my turn to go on stage and officially announce the relationship between my wife and me, my wife's first love suddenly proposes to her in front of everyone. Angela Reed does not refuse. Instead, she laughs brightly and promotes Samuel Hayden to the new department manager. Employees throughout the entire company cheer loudly for their romance. Seeing that I have no reaction, someone beside me cannot help but ask, "Ronald, you've worked for Ms. Reed for nine years. How can you show no response at all?" I smile as I walk onto the stage, take off my wedding ring, and toss it to Samuel. "How can you propose without preparing a ring? Here—it's yours."