I've conducted and participated in dozens of technical interviews across my career, experiencing everything from one-on-one sessions with CTOs to panel interviews with entire development teams. I've tackled timed quizzes, built features in live coding sessions, worked through algorithmic challenges, completed take-home assignments, and demonstrated system design capabilities.
This experience has taught me what actually works when preparing for technical interviews. In this guide, I'll share practical strategies, actionable recommendations, and checklists that will strengthen your interview performance and improve your chances of landing the role.
What We'll Cover:
The Secret That Will Increase Your Interview Performance By 53% (at Least It Did For Me)
Step 1: Building a Strong Foundation in Core Web Development Concepts
Introduction
Technical interviews evaluate how you think, code, and communicate under pressure. Success depends equally on demonstrating your problem-solving process and showcasing your technical abilities. Like any performance skill, confidence and fluency improve dramatically with deliberate practice.
Most technical interview processes follow three stages:
Technical screening: A 15–30 minute conversation assessing your fundamental knowledge and fit for the role.
Coding challenge: Either a take-home project or live coding session that reveals how you structure, write, and test code.
Whiteboard interview: Problem-solving on a shared screen while verbalizing your thought process. Interviewers prioritize your approach over perfect solutions.
Interviewers typically evaluate these core competencies:
Data structures: How you organize and access information efficiently.
Algorithms: Your systematic approach to solving computational problems.
System design (senior roles): Your ability to architect scalable systems that handle real-world constraints.
Ultimately, interviewers assess your problem-solving methodology, not just your technical knowledge.
The Secret That Will Increase Your Interview Performance By 53% (at Least It Did For Me)
The secret: narrow your focus.
Before investing time in preparation, identify the specific type of company you're targeting.
This decision determines exactly what you need to study and practice. Different company types require fundamentally different skill sets and interview approaches.
Here are the main categories to help you focus your preparation:
1. Big Tech / FAANG-level Companies
(Google, Amazon, Meta, Apple, Microsoft)
Core skills:
Data structures & algorithms
System design (scalability, distributed systems)
Computer science fundamentals (OS, networking)
2. Mid-size Product Companies / SaaS
(Shopify, Stripe, Notion)
Core skills:
Deep stack expertise (React, Next.js, Node.js)
API design & third-party integrations
Database design (SQL/NoSQL)
3. Startups (Early-stage)
Core skills:
Full-stack development
Rapid prototyping
End-to-end feature delivery
4. Design Agencies / Creative Studios
Core skills:
Advanced HTML, CSS, JavaScript
Animation libraries (GSAP, Framer Motion)
Pixel-perfect implementation
5. Enterprise / Corporate Companies
Core skills:
Backend development (Java, .NET, and similar)
Enterprise database systems (SQL)
APIs & microservices architecture
6. E-commerce & Marketing Agencies
Core skills:
Platform expertise (Shopify, WordPress)
Frontend development
SEO & performance optimization
7. AI-first / Modern Tech Companies
(OpenAI, Anthropic)
Core skills:
AI API integration (LLMs, embeddings)
Prompt engineering
Backend & data pipeline management
8. Freelance / Indie / Micro-SaaS
Core skills:
Full-stack development (Next.js)
Payment & authentication systems
Deployment & basic marketing
These are high-level guidelines. Specific roles will require additional skills beyond these categories. Use this framework as a starting point for focused preparation.
Consider this: a top FAANG engineer would likely struggle to build an Awwwards-caliber landing page, while an award-winning web designer from a creative agency might perform poorly on algorithmic challenges. Each domain demands specialized expertise. Choose your target and prepare accordingly.
Step 1: Building a Strong Foundation in Core Web Development Concepts
After selecting your target company type, assess your fundamental skills. Most candidates fail interviews not from lack of experience, but from weak fundamentals.
Solid foundations make everything easier: coding challenges, system design discussions, and actual job performance.
Master these core areas:
HTML & CSS
JavaScript fundamentals
One framework deeply: Achieve proficiency in a single stack (such as React + Next.js) rather than surface-level knowledge of many.
APIs & backend basics: Understand data flow, REST APIs, authentication, and frontend-backend communication.
Databases: Know when to use SQL versus NoSQL. Be comfortable writing basic queries and modeling data relationships.
Git & workflows: Demonstrate confidence with version control, branching strategies, and collaborative development.
The objective isn't encyclopedic knowledge. It's clarity, confidence, and consistency in fundamentals.
Strong basics enable faster problem-solving, clearer communication, and natural differentiation in interviews.
Flashcard practice effectively reinforces fundamentals. I built the 99cards app specifically for this purpose if you want a structured approach.
Step 2: Going Deeper Into Subject Matter
At this stage, you've identified your target company type and confirmed your fundamental skills are solid.
Now focus on the specific interview formats and technical areas relevant to your target role—whether that's algorithms, live feature development, or system design.
Here's an often-overlooked advantage: In roughly 80% of cases, HR conducts an initial screening before the technical round. Use this strategically.
When invited to a technical interview, I immediately ask the HR contact what I should prepare. This simple question consistently yields valuable intelligence about:
Which topics to prioritize
Expected task formats
Specific tools or platforms they'll use
This eliminates guesswork and enables targeted preparation.
Interview Preparation Guide
1. Answer Technical Questions (1-on-1 / Many-to-1)
These conversations with a CTO or development team assess your thinking process, not just your knowledge base. Approach them as technical discussions rather than interrogations.
Structure your responses effectively:
Walk through your reasoning step by step
Reference concrete examples from your experience
When uncertain, acknowledge it and reason through the problem aloud
In panel interviews, maintain composure by addressing one question at a time and engaging directly with whoever is speaking.
For example, when hiring a web developer for my micro SaaS, algorithmic knowledge wasn't a priority — but deep, hands-on Next.js proficiency was. To assess that, I ran candidates through live flashcard sessions on the spot.
How to effectively prepare
Practice explaining concepts out loud rather than just running through them in your head. Teach as if someone else is in the room — that's when gaps in understanding become obvious.
Do mock interviews with a friend or record yourself. Prioritize clarity and structure over cramming more content.
Prepare concrete stories from past projects
Review core concepts: JS, React, APIs
Practice saying "I don't know" confidently — it signals self-awareness
2. Go Through Quizzes with a Timer
Timed quizzes test your command of fundamentals under pressure. They're typically multiple-choice or short coding questions, and the goal is accuracy — not just speed.
A few practical tips:
Don't get stuck on a single question. Skip it and come back.
Recognize common patterns before test day — familiarity is your biggest advantage.
Speed improves with repetition. Treat it like a game and track your progress.
How to effectively prepare
Use platforms that offer timed tests to simulate real pressure. Monitor both your speed and accuracy over time.
Concentrate on the topics that come up most frequently:
JavaScript fundamentals
Basic algorithms
Output-based questions
Short daily sessions beat long infrequent ones. Consistency is what compounds.
3. Build Features into Existing Apps (Live Mode)
In many technical interviews, you'll be dropped into a real or mock codebase and asked to extend it. This format tests how quickly you can read unfamiliar code, understand its structure, and make changes without breaking things.
Focus on:
Understanding the codebase before touching anything
Asking clarifying questions upfront
Writing clean, straightforward solutions
Talk while you work. Narrating your decisions shows interviewers how you think — which matters as much as the output.
How to effectively prepare
Work with someone else's codebase, not your own. Clone open-source projects and explore them — read the structure, trace the data flow, then make a small change.
Read files before writing a single line
Trace how data moves through the system
Make small, safe, reversible changes
Also practice narrating your actions as you code. It feels awkward at first — that's exactly why you need to rehearse it.
4. Live Code Algorithms
This is where many developers hit a wall. You're expected to solve problems in real time while simultaneously explaining your reasoning — a skill that takes deliberate practice to build.
Resist the urge to code immediately. Instead:
Clarify the problem before anything else
Talk through your approach out loud
Start with a working solution, then optimize
Interviewers care more about how you think than whether you land on the perfect answer.
How to effectively prepare
Work through common algorithm problems consistently. Focus on recognizing patterns rather than memorizing solutions.
Solve out loud — as if someone is sitting across from you.
Arrays, strings, hash maps
Sorting and searching
Basic recursion
Time yourself and always review your solution afterward. Understanding why something works matters as much as making it work.
5. Take-Home Assignments
Take-homes simulate actual work. You get time to build something properly — which makes them a genuine opportunity to stand out from the field.
What matters most:
Clean, readable code
Logical structure and consistent naming
A clear README that explains your decisions
Don't overbuild. A smaller, focused project that's polished and complete will always outperform an ambitious one that's half-finished. Quality over quantity, every time.
How to effectively prepare
Build small projects with real-world structure. Practice finishing things — shipping is a skill, not just starting.
Write clean, descriptive commits
Add a clear, thoughtful README
Handle edge cases deliberately
Approach every take-home as if you're submitting deliverables to an actual client.
6. System Design
System design interviews are standard for mid-level and senior roles. You'll be asked to design a system from scratch — or critique and improve an existing one.
Start simple, then expand outward:
Define the requirements clearly
Sketch a basic architecture first
Address scaling, performance, and trade-offs as the conversation evolves
Think like a builder, not just a programmer. The goal is to demonstrate how you make decisions — not to produce a perfect diagram.
How to effectively prepare
Study common system design patterns and real-world architectures. Start with simple systems and build complexity gradually.
APIs and data flow
Databases and caching strategies
Scaling fundamentals
Watch recorded system design interviews and practice articulating your reasoning clearly — out loud, not just on paper.
For every interview format covered here, you can use my free checklists to sharpen your preparation further.
A Fun Story
Years ago, I applied for a front-end role at a company known for building Awwwards-caliber websites. The technical assignment: rebuild a Figma design into a polished, GSAP-animated site. I failed.
Eighteen months later, the same company posted an opening. I applied again. Care to guess what the assignment was? 😄
The exact same one.
Draw your own conclusions.
The Most Important Part
Here's a framework worth keeping in mind throughout your entire preparation process:
The PDCA Framework
P — Plan
D — Do
C — Check
A — Act
It's the framework I return to whenever I'm trying to improve at something. Here's how it applies to technical interview prep:
Plan: Define your preparation routine and map out what you need to work on.
Do: Execute the plan. Put in the actual reps.
Check: Compare your plan against your results. Where did reality diverge from intention? What can be tightened?
Act: Make adjustments. Feed those lessons into a better Plan 2.0.
Repeat the cycle until you get the outcome you're after.
Conclusion
Technical interviews aren't about being flawless. They're about demonstrating how you think, communicate, and perform under pressure. The more deliberately you practice, the more natural and confident you'll feel when it counts.
Master the fundamentals, tailor your prep to your target company, and train under realistic conditions. Do those three things and you'll already be ahead of most candidates walking through the door.
P.S.
If you want to accelerate your preparation and cut out the guesswork, I put together a complete toolkit with everything you need in one place:
Interview Checklists
CV Template
Cover Letter Template
List of Top 50 Remote-First Companies
Job Application Tracker Spreadsheet
Get it here: 99cards.dev/toolkit