System Design Interview – An Insider's Guide

Elena Cordova designed revolutionary algorithms for a multi-million-dollar company. The only formula she couldn't solve? Her own marriage. After seven years of being the invisible wife to a cold billionaire, Elena is finally trading in her wedding ring for her worth. Marcus Ashford married her for obligation, hid her from the world, and replaced her with a woman who played the perfect stepmother. But when he finally pushes her too far, he discovers that the brilliant, betrayed woman he dismissed has been running calculations all along. Now, Elena is back in the boardroom, her mind sharp, her fortune growing, and a handsome rival billionaire watching her every move. She wants revenge. She wants vindication. She wants her daughter back. Marcus thought she was a social climber. He thought she was docile. He thought he could replace her. He was wrong. He used her for her brilliance. Now, she'll use her brilliance to take everything back. Divorce is just the beginning of her beautiful, calculated comeback.

Emily Carter once believed love could overcome anything. For two years, she devoted herself completely to Jason Walker, sacrificing her dreams, savings, and happiness to build a future with him. When the zombie virus suddenly plunged the world into chaos, Emily never hesitated to protect him. She scavenged dangerous streets for food and medicine, fought countless zombies to keep him alive, and repeatedly placed herself in mortal danger so he could survive another day. Three months into the apocalypse, everything she believed shattered. Cornered by an overwhelming zombie horde, Jason abandoned Emily without hesitation, choosing to save his secret lover, Vanessa Kane, instead. As Emily lay dying, surrounded by the undead, she realized that every sacrifice she had made had been for someone who never truly loved her. Instead of dying, Emily awakens exactly one month before the outbreak begins. She remembers every horrifying detail of her previous life—the collapse of society, the rise of mutant zombies, the betrayal of trusted allies, and the locations of future safe zones and supply caches. At the same moment, a mysterious voice echoes inside her mind. “SSS-Level Survival System Activated.” The system grants Emily missions, rewards, powerful skills, and access to a limitless storage space, allowing her to prepare for the coming apocalypse far better than anyone else. Unlike her first life, she refuses to waste her second chance chasing love or relying on others for survival. Her only priorities are staying alive, protecting those who deserve her trust, uncovering the truth behind the virus, and building a secure settlement capable of surviving the end of the world.

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.

Framed and ruined tech genius Reid Brecken had constructed CipherCore, only to have it all torn from him by his partners and ruthless investor Dante West, condemning him to a rain-drenched purgatory. Presented with a lone opportunity for revenge—becoming the living duplicate of vanished tech mogul Max Sterling. Reid is subjected to a drastic transformation: his face remodeled, his mind woven inextricably into Max’s digital specter. Propelled into the golden cage of Max's existence and the sphere of his suspicious wife, Alessandra, Reid makes a shocking discovery: Max isn't missing; he's confined. And his revolutionary neural innovation, Synapse, has been turned into a weapon that West would murder for to control. When Reid is ordered to commit an unthinkable act to prove his loyalty, he faces an impossible choice: become the monster he’s impersonating or risk everything, his vengeance, his life, and the woman who holds his fractured heart to blow this conspiracy apart. But in a world where faces and minds can be altered, whom can Reid trust? And can he reclaim his existence before he's lost forever? Vengeance Algorithm is a pulse-pounding romantic thriller where identity and illusion, love and manipulation, revenge and redemption blur beyond recognition. It’s perfect for you if you go for high-stakes suspense, complex relationships, and protagonists pushed to their absolute limits.

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 project I had poured my heart and soul into earned the company over a hundred million in profit, yet the credit was handed to the vice president's nephew. I stood in a corner, the stack of source code documents trembling in my hands, nearly crushed by my grip. That nephew—who couldn't even get Hello World to compile—was now on stage, smiling brightly as he accepted the award. The vice president came over and draped an arm around my shoulder like we were old friends. "You're just an outsourced worker," he said casually. "These honors wouldn't mean anything to you anyway. Jason is new. He's got limitless potential. From now on, you'll be responsible for mentoring him properly." Only then did I realize that decades of struggle had been nothing more than laying out a red carpet for someone else's glory. That very night, while reviewing the project's code repository, I discovered a massive flaw—one serious enough to bring the entire system crashing down within three days.