A technical interview is a kind of initiation ritual in the IT world that can scare even experienced developers. Today we will figure out how this process is arranged from the inside, what stages await candidates and how to prepare so as not to get confused in front of the interviewer.
Anatomy of a modern technical interview
A modern interview is not a one-time meeting, but a multi-stage process that can last from a week to several months. Let's look at each stage in more detail.
Stage 1: Telephone screening
The first contact usually occurs with an HR specialist or recruiter. At this stage, they check your experience, motivation, and salary expectations. Sometimes they ask basic technical questions like:
"What is the difference between a process and a flow?"
"What is REST API?"
The goal is to make sure that you have really worked with the technologies listed in your resume.
Stage 2: Technical interview with the developer
The real test begins here. Usually, you are connected to a video call with engineers. The most common format is Live Coding, where you need to solve the problem in real time, commenting on your actions.
Example: write a function that finds two numbers in an array whose sum is equal to a given value. A simple task can turn into a challenge when several pairs of eyes are watching you.
At this stage, it is important not only to make a decision, but also to think. Interviewers evaluate:
how you break down a task into subtasks,
do you take into account extreme cases,
whether you evaluate the complexity of the algorithm.
Companies like Google, Facebook, and Amazon are especially fond of algorithm and data structure tasks — trees, graphs, hash tables, and search.
Stage 3: System Design
For middle and senior developers, it is almost always held System Design Interview. Here you need to design a system: a news feed, a chat, a link shortener, etc.
The main thing is to show architectural thinking: how you divide the system into components, what databases you use, how you ensure scalability and fault tolerance.
Typical questions: "How will you ensure data consistency?", "How will you cope with the increase in workload?".
Stage 4: Behavioral Interview
Many underestimate this stage, but it is no less important. The method is used STAR (Situation, Task, Action, Result) You will be asked to tell real stories:
"Tell us about a bug that you managed to find and fix"
"How did you cope with the deadlines?"
"Was there a time when you disagreed with a colleague?"
The goal is to evaluate your soft skills: communication, teamwork and stress resistance.
Homework: good or bad?
Sometimes, instead of live coding, you will be given a test task. This is a chance to show a real approach to work, but if you are required to do a full-fledged project without payment — 🚩 red flag.
A good test task takes 2–4 hours, not a week.
What is actually being evaluated?
Technical skills: not only syntax, but also understanding of concepts.
Problem-solving ability: calmly deal with the unknown.
Communication: you can explain the decision to the team.
Learning: you know how to take hints and adapt.
Cultural fit: whether you fit the spirit of the company.
How to prepare for an interview?
Practice algorithms. Use LeetCode, HackerRank, CodeSignal.
Repeat the basics of data structures. Arrays, trees, graphs, hash tables.
Learn system design. Read "Designing Data-Intensive Applications".
Solve problems out loud. Practice explaining decisions.
Prepare questions for the company. This will show your involvement.
Life after rejection.
Rejection is not the end. Even strong developers get them. The main thing is to ask for feedback, analyze mistakes, and move on. Each interview makes you stronger.
A technical interview is a game with rules, and you can learn them. Don't treat the interview as an exam — it's a two-way conversation. The company is looking for the right person, and you are looking for the right place.
💙 The main thing is to keep developing, learn new things and believe in yourself. And if you want to prepare systematically, try application Code. There you will find courses, practical tasks and developer communitythat will help you pass any interview.
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