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8 Steps to acing your next system design interview

8 Steps to acing your next system design interview

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Connie Benton
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November 19, 2019
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3 min read
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System design can be a huge leap forward in your career both in terms of money and satisfaction you get from your job. But if your previous job was focused on working closely on one of the components of a system, it can be hard to switch to high-level thinking

Imagine switching from roofing to architectural design. Instead of knowing the ins and outs of making one component, you need to develop a system of components that work well together. This is why so many people fail in system design interviews. They don’t understand what the interviewer wants to hear from them.

What are interviewers looking for?

You walk into an interview, ready to discuss the pros and cons of using NoSQL, fine details of implementing map-reduce, and the possibilities of using the newest node library. What do they ask you? Design Netflix from scratch.

This leaves many interviewees puzzled, and they do two crucial mistakes. The first mistake is focusing too much on the service that already exists. The interviewer doesn’t want to know how Netflix or Twitter is actually made. Rather, they want to see your thought process that goes into creating a similar system.

The second mistake is focusing too much on details. That’s not what you need to do, at least not at first. The technical knowledge and the ability to solve bottlenecks is great, but your main goal for such interviews should be understanding the type of system you need to develop and figuring out the optimal way of solving user problems.

How to ace a system design interview: A step by step guide

Now that you know the direction, let’s go through the interview, step by step.

Step 0: Get good

Preparing for the interview starts months before you arrive at the office. You need to work on gaining knowledge and acquiring skills to be sure that you have what it takes to crack it.

This includes a lot of reading. Start with following high scalability and getting yourself a copy of Martin Klepmann’s Designing Data-Intensive Applications. It’s a great place to start if you have limited experience with system designs.

If you have the knowledge but struggle to apply it to real-world problems, try hosting brainstorming sessions with your pals. After all, trying to design Twitter from scratch can be fun when your employment doesn’t rely on it.

You can go even further and attend a hackathon to try implementing your system design knowledge in practice and get expert advice on it. When you feel confident about your skills, start polishing them before the interview. For instance, you can focus your practice on the typical cases interviewers offer.

In most cases, the interviewer will ask you to design one of the following services:

  • URL shortener
  • Social network
  • Messenger
  • Video streaming
  • File storage
  • Search engine

If you know a bit about each of these services, you’re already on the right track. To gain even more confidence before the actual interview, attend a mock one. You can do it online, and instead of “we’ll call you back”, you’ll receive an expert opinion on your performance.

Step 1: Define the key assumptions about the system

Now, let’s say you’ve made it to the interview. Given the number of applications big tech companies receive, it’s already an achievement. You feel good about yourself, and when the interviewer asks you to develop something like Facebook, you start talking about peculiarities of data storage and what is the best way to create a dynamic feed.

That’s not what they expect to hear. First, you need to understand what kind of system are you building. What is the intended audience? What problems are they solving with this service? You’ll need to answer those questions before you can go any further.

In many cases, the interviewer won’t know the answer. Why? Here’s a very important thing about system design interviews: it’s not about giving the correct answer to a well-defined problem, but it’s about your ability to define the open-ended problem and solve it creatively.

This means you can pretty much decide on these key assumptions together with the interviewer.

Step 2: Define the key features

Once that is out of the way, your next step is defining what kind of features your hypothetical service must possess. Even though your task is designing an already existing service from scratch, it doesn’t mean they should be identical.

For instance, if you’re tasked with designing Facebook, you can take the features this social media has as the basis and work from that. Think of ways you can combine Messenger and Facebook into one app instead of two or suggest how to make ads more user-friendly.

If you’re tasked with developing a Discord-like chat, you’ll need to include secure chat rooms with stable voice chat features. You can also suggest a streaming option. If you need to develop a digital product marketplace such as Pro Essay Writer, you’ll need to combine features like dynamic display of offers, secure access to database, and several payment options. You can throw in a Ai live chat or a monitoring feature to make sure the freelancer the user has hired is busy working on the project.

This will show the interviewers that you’re not only capable of reverse-engineering a service, but actually thinking about the problems customers face and solving them.

Step 3: Define the scale

While the system you design should be scalable, you need to start somewhere. This is why you need to define the scale of the system at first. Think about the read-to-write ratio, the number of concurrent requests the system should expect, and various data limitations.

Once you define these parameters together with your interviewer, you can think of the best way to make that system work well and be scalable. But before that, there’s one more step.

Step 4: Define the data model

Before you can design the hypothetical system, you need to define how you’re going to process data. Find out the main inputs and outputs, how they’re going to be stored, and how the data will flow.

This doesn’t require you to know every little aspect of implementing MongoDB or the latest MySQL library. If you know what database would serve the purpose better, it’s going to be enough. Remember, you don’t need to go into detail too much at this stage.

Step 5: Design the high-level system

By this time, you should have all the information necessary to design the system your interviewer wants. Ideally, you should be no more than 15-20 minutes into the interview.

Start with the entry-points and work your way up to the database. If the interview room has a whiteboard, it’s a great opportunity to visualize your ideas, but even a sheet of paper will do. Draw the architecture that’s needed to support all user and API interactions and present a decent response time.

Don’t be afraid to change the layout of the system on the go. Interviewers don’t care about you making mistakes. They want to see if you’re able to iterate your ideas and improve as you go along.

Step 6: Look for bottlenecks

Once your version of the system seems more or less final, you can get down to details. Look for possible bottlenecks that can slow down or hinder the functions of the system. It’s also okay to take the interviewer’s advice on this. In many cases, the interviewer is an expert on the topic, so you’ll only show your readiness to learn and improve by this.

Find out the bottlenecks and come up with ways of eliminating them either by redesigning a part of the system, or scaling up the hardware.

Step 7: Go in-depth on the subsystem you know well

This is an optional step, but many interviewers ask you to go through this as well. You’ll have to go low-level and elaborate on a subsystem. If you can, steer the conversation to the one you know best.

There’s no shame in admitting you don’t know much about a certain subsystem. After all, you’re no Renaissance man, and the company you’re applying to has teams of experts working on each subsystem, so you’ll have plenty of opportunities to consult with them.

Show off the knowledge you have, and move to the next step.

Step 8: Acknowledge the trade-offs

No system is ideal, and a good system design engineer knows that well. Let the interviewer understand what trade-offs did you make to let the system work well at this stage.

Stay in touch

With that, your 45-minute interview should be over, and the interviewer would be either impressed or bored with your take on the problem. Regardless, you should try to stay in touch with them to increase your chances of getting hired. At the very least, you may get an expert opinion on what went wrong.

If you’ve failed the interview, don’t stop in your tracks. It’s just an opportunity to learn more and practice more. Join Hackathons and do mock interviews to up your skills, and you’ll get the job you’ve been dreaming about.

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November 19, 2019
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What Gen Z Expects From HR Leaders in 2026

What Gen Z Expects From HR Leaders in 2026

Introduction

Gen Z is entering the workforce with a very different perspective on work, leadership, and career growth.

Unlike previous generations, they are not just evaluating salary packages or job titles. They are paying closer attention to workplace culture, flexibility, transparency, learning opportunities, and overall employee experience.

For HR and Talent Acquisition leaders, this shift is changing how organizations attract, engage, and retain talent.

Having entered the workforce during a period of rapid workplace transformation, Gen Z values authenticity over polished corporate messaging and meaningful experiences over traditional corporate structures.

Employer Branding Is Now About Experience

Employer branding today is no longer defined only by career pages or company values.

Gen Z pays attention to how recruiters communicate, how transparent the hiring process feels, and how employees speak about the company publicly.

For Talent Acquisition teams, recruitment is no longer just a hiring function. It has become a reflection of workplace culture itself.

Candidates today value clear communication, transparency, honest conversations around growth, and personalized experiences throughout the hiring journey.

This is also why skill-based hiring and fair evaluation processes are becoming more important for modern organizations.

Gen Z Values Authenticity

One of the biggest shifts HR leaders are noticing is that Gen Z values honesty far more than polished corporate narratives.

They want realistic conversations around career growth, workplace expectations, compensation, and learning opportunities.

Interestingly, they do not expect organizations to be perfect. What they expect is transparency and authenticity.

Younger employees quickly recognize when workplace messaging feels disconnected from reality. Organizations that communicate openly tend to build stronger trust and credibility with Gen Z talent.

Career Growth Looks Different Today

Traditional career growth models were designed around long timelines and annual reviews.

But Gen Z expects growth to feel continuous.

Instead of waiting for yearly discussions, employees want faster feedback, ongoing learning, mentorship opportunities, and clear visibility into growth from the beginning of their journey.

This means career development is no longer just part of appraisal cycles. It is becoming an everyday part of the employee experience.

Organizations investing in learning, internal mobility, and skill development are more likely to keep younger employees engaged.

Flexibility Is About Trust

For Gen Z, flexibility is no longer viewed as a workplace perk.

It is an expectation.

But flexibility goes beyond remote or hybrid work. It also includes autonomy in how employees manage work and productivity.

At its core, flexibility has become a question of trust.

Gen Z values workplaces where managers focus on outcomes instead of constant visibility or monitoring. For HR leaders, this means flexibility cannot exist only in policies. It must also exist in leadership behavior and workplace culture.

Well-Being Is Part of the Work Experience

For Gen Z employees, mental well-being is not a separate HR initiative.

It is part of the everyday employee experience.

They are quick to notice the gap between organizations talking about wellness and employees actually feeling supported.

This means HR teams need to think beyond wellness campaigns and focus more on how work itself is designed and managed.

Because employees do not experience policies. They experience culture every single day.

Final Thoughts

Gen Z is not simply changing workplace expectations. They are challenging organizations to rethink how modern work should actually function.

For HR and Talent Acquisition leaders, this creates an opportunity to build more transparent, flexible, and people-focused workplaces.

The organizations that will attract and retain Gen Z talent successfully are not necessarily the ones with the loudest employer branding or trendiest benefits.

They are the ones building cultures based on trust, authenticity, flexibility, growth, and meaningful employee experiences.

Remote, Hybrid, or Office? What Actually Works and Why

Remote vs Hybrid vs Office: What Actually Works in 2026?

Introduction

Somewhere between “you’re on mute” and badge-swiping back into office buildings, work didn’t just change, it split into choices.

Remote work. Hybrid work. Office-first culture.

Policies were rewritten again and again, but one question still dominates HR and Talent Acquisition conversations:

Are organizations building work models that genuinely improve productivity, employee experience, and retention, or simply reacting to pressure from leadership, candidates, and competitors?

The truth is, there’s no universal answer.

The Myth of the Perfect Work Model

Over the last few years, companies have learned that no single workplace model works for everyone.

Organizations that embraced fully remote work gained access to wider talent pools and improved flexibility. But many also struggled with collaboration gaps, communication fatigue, and weaker cultural connection.

Meanwhile, strict return-to-office policies brought structure and in-person collaboration back, but often at the cost of employee satisfaction and retention.

Hybrid work quickly became the middle ground. Yet in practice, hybrid is often the hardest model to execute well because it demands balance, consistency, and intentional leadership.

The real question isn’t whether remote, hybrid, or office is better.

It’s: What outcome is the organization trying to optimize for?

What HR Leaders Are Seeing

HR teams across industries are noticing a shift in how people work and what employees value.

Remote hiring has dramatically expanded access to talent beyond geographical boundaries. Talent Acquisition teams can now hire specialized talent faster and from more diverse locations.

At the same time, office environments still play an important role in onboarding, mentorship, and early-career learning. Informal conversations, quick collaboration, and day-to-day exposure are still difficult to replicate virtually.

Hybrid models try to combine both advantages, but they also introduce challenges like proximity bias, where employees who spend more time in the office often receive greater visibility and growth opportunities.

This raises an important question for HR leaders:

Are workplace policies rewarding performance or simply physical presence?

What Candidates Actually Want

Candidates today are not just choosing jobs anymore. They’re choosing lifestyles.

For many professionals, remote work represents flexibility, autonomy, and better work-life balance. For others, especially younger professionals, office environments provide structure, mentorship, and stronger human connection.

What’s interesting is that candidate preferences are becoming more nuanced.

Someone may prefer remote work but still choose a hybrid role if it offers stronger career growth. Another candidate may prioritize flexibility over compensation altogether.

For Talent Acquisition teams, this changes everything.

Work models are no longer just operational policies. They’ve become part of the employer value proposition.

Culture Is More Than a Workplace

There’s a common belief that culture only exists inside offices.

But culture isn’t tied to a physical location. It’s shaped through communication, trust, leadership, and shared experiences.

Organizations that succeed with remote work usually focus on clear communication, strong documentation, and outcome-based performance management rather than constant visibility.

Meanwhile, companies succeeding with office-first models are redefining what offices are actually meant for: collaboration, creativity, and connection instead of simply showing up at a desk.

Because if employees are commuting only to spend the day on virtual meetings, the office experience loses its purpose.

What Actually Works?

The organizations getting workplace strategy right are not obsessing over whether remote, hybrid, or office is superior.

Instead, they are focusing on intentionality.

They listen closely to employee behavior and outcomes, not just survey responses. They treat work models as evolving systems instead of fixed policies. Most importantly, they align workplace strategy with business goals and employee needs simultaneously.

That’s where the real difference lies.

Final Thoughts

The future of work isn’t remote, hybrid, or office-first.

It’s intentional, adaptable, and human-centered.

The companies that understand this won’t just attract better talent, they’ll build stronger cultures, healthier teams, and more sustainable workplaces for the future.

5 Habits That Make You Stand Out at Work

5 Habits That Make You Stand Out at Work

Standing out at work is not always about doing more. In many cases, professional success comes down to how you think, communicate, and respond under pressure.

Employees who consistently stand out in the workplace are often the ones who remain calm in difficult situations, communicate with clarity, and bring thoughtful input into conversations. These workplace habits build trust, improve leadership presence, and create long-term career growth opportunities.

The good news is that these are not natural talents reserved for a few professionals. They are habits that can be practiced, improved, and strengthened over time.

For professionals looking to improve workplace communication skills, leadership qualities, and career development, the following habits can make a significant difference.

1. Pause Before You React

One of the most important professional habits is learning how to respond calmly instead of reacting instantly.

When something goes wrong at work, the natural instinct is often to answer immediately. However, fast reactions do not always lead to effective communication or strong decision-making.

Taking a moment to:

  • Understand the situation
  • Gather context
  • Process information carefully
  • Think through your response

can help professionals communicate more clearly and avoid unnecessary confusion.

In high-pressure workplace environments, calm responses often leave a stronger impression than rushed reactions.

Professionals who stay composed during stressful moments are frequently seen as more reliable, emotionally intelligent, and leadership-ready.

2. Give Yourself Time to Think

Not every workplace question requires an instant answer.

Saying:

“Let me think about that.”

can actually make you sound more confident and thoughtful.

This simple communication habit shows that you value clarity and accuracy instead of speaking just to fill silence.

In:

  • Team meetings
  • Leadership discussions
  • Job interviews
  • Client conversations
  • Stakeholder presentations

taking time to think can improve both the quality of your response and the way people perceive your judgment.

Strong professionals are often recognized not for how quickly they respond, but for how thoughtfully they process information and communicate ideas.

This is a critical workplace communication skill that improves professional credibility over time.

3. Get Comfortable With Silence

Silence makes many people uncomfortable.

As a result, professionals often rush to fill every pause during meetings, interviews, or conversations.

But silence can actually improve communication effectiveness.

A short pause gives you time to:

  • Organize your thoughts
  • Deliver stronger responses
  • Improve clarity
  • Communicate with more intention
  • Reduce unnecessary overexplaining

Professionals who are comfortable with silence often appear:

  • More composed
  • More self-assured
  • More confident under pressure
  • Better at executive communication

especially in high-stakes professional situations.

Learning how to stay calm during silence is an underrated but valuable professional development skill.

4. Ask One Thoughtful Question

You do not need to speak the most to stand out at work.

Sometimes, one thoughtful question creates more impact than a long explanation.

Thoughtful questions can:

  • Reveal blind spots
  • Improve team discussions
  • Encourage strategic thinking
  • Demonstrate leadership potential
  • Show strong critical thinking skills

Employees who ask meaningful questions are often viewed as more engaged, analytical, and solution-oriented.

This is one of the fastest ways to leave a memorable impression in workplace conversations and professional meetings.

Strong leaders are not only recognized for giving answers.

They are also recognized for asking the right questions.

5. Keep Your Communication Clear and Concise

One of the most valuable workplace skills is clear and concise communication.

Overexplaining can weaken even strong ideas.

Professionals who stand out in the workplace are often the ones who communicate with structure, simplicity, and clarity.

They focus on:

  • What matters
  • Why it matters
  • What action is needed

without adding unnecessary complexity.

Clear communication improves:

  • Workplace collaboration
  • Leadership presence
  • Team alignment
  • Professional confidence
  • Decision-making conversations

In modern workplaces, communication skills are often just as important as technical expertise.

The ability to explain ideas clearly is a major differentiator for career growth and leadership development.

Why These Workplace Habits Matter

These habits sound simple, but they become difficult to apply when the pressure is real.

In:

  • Job interviews
  • High-pressure meetings
  • Leadership conversations
  • Workplace conflict situations
  • Client presentations

people often rush, overtalk, or respond before fully thinking through the situation.

That is why practice matters.

Professional communication skills improve through repetition, structured feedback, and realistic practice environments.

Employees who consistently practice these habits often become more confident communicators and stronger workplace contributors over time.

Practice Before the Pressure Is Real

If you want to improve how you think and communicate under pressure, you need opportunities to practice those moments before they actually matter.

HackerEarth OnScreen (AI Interviewer) helps professionals build workplace communication skills, interview confidence, and structured thinking through realistic AI-led interview experiences.

The platform helps professionals:

  • Practice answering questions clearly
  • Improve communication under pressure
  • Structure thoughts effectively
  • Build interview confidence
  • Develop executive communication skills
  • Get comfortable with pauses and silence
  • Improve professional speaking habits

It is not only designed for interview preparation.

It also helps professionals strengthen the workplace habits that improve career growth, leadership readiness, and communication confidence.

👉 Try HackerEarth OnScreen and practice the habits that help you stand out when it matters most.

Final Thought

Standing out at work is not about being the loudest person in the room.

It is about being:

  • Thoughtful
  • Clear
  • Calm under pressure
  • Confident in communication
  • Intentional in your responses

Professionals who consistently develop these habits often build stronger workplace relationships, better leadership presence, and long-term career success.

And the more you practice these habits, the more naturally they appear in the moments that shape your professional growth and career opportunities.

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