Software Interview Prep: A Guide by Türkiye Company Type
You got the interview. Your CV passed the filter, the recruiter's six-second scan went through, and now you're at the technical stage. Most candidates here start brushing up on their technical knowledge - opening LeetCode, watching system design videos, scanning lists of "common questions."
Here's the catch: interview performance is decided by how you prepare, not by what you know. Two developers with the same technical level walk in; one walks out with an offer, the other gets the "we decided to move forward with another candidate" note. The difference is understanding the format and preparing for it specifically.
This article walks through the interview formats you'll face in the Türkiye software market and what's actually being measured in each one. Not a question bank; a framework. Read it before an interview so you know which game you're walking into.
Interview Types in the Türkiye Market
There's no single "developer interview" format. The company's structure shapes the process. Three main categories - and preparing without knowing which one you're in is wasted effort.
Local enterprise (banks, telecom, e-commerce)
Two to three rounds: recruiter screen, technical interview (usually with someone from the team), manager round. Algorithm questions are rare; instead they go deep on projects you've worked on. "What was the hardest problem in this project, how did you solve it" is a typical opener. System design comes up but not at "high-scale" level; more like "how would you build this feature."
Startup / scale-up
Fast process, few rounds. Often direct conversation with the founder or tech lead, followed by a short technical exercise. Instead of algorithms, expect "build a small feature" type practical tasks. Pace and "how quickly will you integrate" matter more. Behavioral questions aren't filler; team fit really is being tested because in 8-12 person teams a bad hire costs a lot.
International company (remote or in-office)
FAANG and similar large companies run a standard playbook: 4-6 rounds, online assessment, at least two algorithm rounds, system design round, behavioral round. LeetCode practice actually pays off here. But mid-size international companies hiring from Türkiye (a European B2B SaaS, for example) don't copy FAANG - they look closer to the local enterprise format.
We covered the application side of these processes in working remotely for a foreign company.
Preparing for the Algorithm Round
Winning the algorithm round isn't about memorizing hundreds of problems. The real factors are problem-solving method, structured thinking, and communication.
How to use LeetCode?
The goal isn't "I solved 200 problems." The goal is: after solving 5-8 problems in one category, you recognize the pattern.
- Two Pointers, Sliding Window - About 30 percent of array and string questions land here.
- Hash Map and Counting - Frequency, matching, occurrence-count problems.
- DFS, BFS - Tree and graph traversal. Patterns from one transfer to the other.
- Dynamic Programming - easy level only - Local companies rarely ask; mid-tier international ones ask "Climbing Stairs" or "House Robber" type problems. Hard DP outside FAANG is uncommon.
40-50 well-chosen problems work better than 200 random ones.
Method During the Interview
Don't code the instant you hear the problem - you're expected to think first. Follow this flow:
- Restate the problem - "So we take this input and produce this output, right?" The interviewer corrects any misunderstanding.
- Ask about edge cases - Empty input? Negative numbers? Sorted array? Duplicates?
- Say the brute force first - "Brute force is O(n²). Can I improve? Yes, with a hash map it becomes O(n)."
- Talk while coding - Silent coding is hard to evaluate. The way you reason out loud is what's actually measured.
- Test it - Walk through your solution with at least two examples.
Skipping four of the five steps and just "finding" the answer hurts you. The company checks "can this person reason inside a team," not "can this person solve a puzzle alone."
System Design Round
In Türkiye this round is standard at Senior+ level. Rare for Junior and Mid; when it does come up it's not "design Twitter" - it's a concrete feature: "How would you build a notification system" or "How would you design a payment service."
Frame and focus
Walk into system design with a standard frame. You have to practice this in advance because in a 30-minute slot, on-the-fly reasoning falls apart.
1. Requirements gathering (5 min)
- Functional: What does the user do? What actions exist?
- Non-functional: How many users, requests per second, latency targets, consistency level?
Don't skip this. A candidate who jumps to design without asking for numbers signals "I write code without understanding the business requirement."
2. High-level architecture (10 min)
- API design (endpoint names, request/response).
- Data model (which tables, which columns, relationships).
- Services (monolith or how many services, how they talk to each other).
3. Data layer (5 min)
- Database choice: Relational or NoSQL, why? "I like MongoDB" isn't an answer; pick based on data structure (relational vs document) and read/write patterns.
- Cache strategy: What gets cached, what doesn't, invalidation logic.
4. Scale and resilience (5 min)
- Where are the bottlenecks? Database writes, network, CPU?
- Horizontal scaling points.
- Failure scenarios: What if the service crashes, retry strategy.
5. Discussion (5 min)
- Trade-offs: What did you gain and lose with each choice?
- Be open to interviewer probes; expect "What if you did this differently?"
The most common system design mistake
Candidates often "throw everything in" - Kafka, Redis, Elasticsearch, CDN, all in one diagram. When asked "why Kafka," they can't answer.
Rule: every component you put in your diagram has to be defendable. If there's no reason to add it, leave it out. A simple design beats a complex one without justification.
Behavioral Questions - The Türkiye Style
International companies use STAR (Situation - Task - Action - Result) as a strict format. In Türkiye it's not framed that rigidly, but the expectation is the same: tell a concrete story.
Typical questions:
- "What was the hardest project, how did you solve it?" - "Writing the code was hard" is empty. They want a moment of indecision, a team conflict, a dependency problem, a concrete decision and its outcome.
- "Tell me about a mistake." - "I deployed broken code to production" is fine, but the follow-up matters: how did you notice, how did you fix it, what changed afterwards (post-mortem, monitoring, process).
- "Did you ever clash with a teammate?" - "No, I get along with everyone" is bad; not realistic. Pick a disagreement, walk through the resolution. Without trashing the other side.
- "Why do you want to work with us?" - They want a concrete reference to the product, the team, or the technology. "Because it's a good company" lowers your offer.
How to prepare your stories
Before the interview, prepare 4-5 stories, each on a different theme:
- A technical achievement (a major performance improvement, a hard bug)
- A leadership / team moment (steering a decision even without a senior title)
- A failure and what you learned
- A team conflict and its resolution
- Why you're leaving your current role (forward-framed, not negative)
These five stories cover 15-20 different behavioral questions. For each, prepare a 90-second summary and a 3-minute detailed version.
Live Coding Traps
Live coding spread across the Türkiye market in the last three to four years. Usually you write code on a shared editor (CoderPad, HackerRank) while the interviewer watches.
Common mistakes
Coding silently: Already mentioned; deadly in live coding specifically. If the interviewer can't see your reasoning, even correct code earns a "weak communication" note.
Not knowing the editor: Try the platform (CoderPad, HackerRank, Codility) before the interview. Is autocomplete on, which languages are available, is there a terminal - figuring this out during the interview burns 10 minutes.
Not writing tests: Most interviewers expect at least one simple test. A single console.log(fn(1, 2)) counts; zero tests reads as "I ship code without verifying it."
Snap solution: Don't start coding the second you hear the problem. Five minutes of thinking isn't impatience; it reads as "this person reasons systematically."
When you hit an error
Code threw an error - don't panic. The interviewer is watching how you debug. Use this sequence:
- Read the error out loud.
- Say which line.
- Form a hypothesis: "I think this is null and that's why it's crashing."
- Test: print, run debugger.
- Fix.
Candidates who follow this sequence score better than the ones who guess the right fix - because in real engineering, errors aren't solved instantly; method matters.
"Do You Have Any Questions?" Moment
Standard interview closer: "Any questions for us?" Most candidates say "no, thanks" or jump straight to salary. Both are wrong.
Good questions to ask
- About the team: "What would you expect me to have accomplished in my first three months?" This question surfaces the company's definition of success.
- About a technical decision: "What technical debt do you currently see and want to address soon?" Reveals the engineering culture.
- Process: "How do deploys to production work, who deploys and how often?" Modern processes or old approval chains?
- Growth: "Has anyone on the current team been promoted in the last year, what was evaluated?" Surfaces promotion transparency. The performance review article goes deeper on this.
Questions you shouldn't ask
- "What does your company do?" - You should have known this before applying.
- "Are the working hours flexible?" - Don't ask in the first interview; that's an offer-stage conversation.
- "How much does it pay?" - Not asked in the first interview. Salary belongs in the recruiter screen or at the offer stage. The first salary negotiation guide covers this.
The Last 24 Hours Before the Interview
Don't save big preparation for the final day. A tired brain doesn't learn new material; it loses what it already had. Use the last 24 hours like this:
- 6-8 hours of sleep. Non-negotiable. Tired interview means lost focus.
- Final pass on company research: Use the product for 5 minutes, read the latest blog posts, check who's on the team on LinkedIn.
- Practice your stories out loud: Rehearse behavioral stories aloud. A story that flows in your head can stumble when spoken.
- Equipment test: Camera, microphone, internet, the platform you'll use. "Can you hear me?" during the call costs you points.
Get to a quiet space 30 minutes before the call. Skip the coffee; adrenaline is enough, caffeine just amplifies the shaking.
After the Interview
Right after the interview, the candidate usually asks "did I pass?" Wrong question; "what did I learn?" is more useful.
Within 15 minutes of the interview, write down:
- The main questions asked (algorithm, system design, behavioral)
- Where you got stuck
- A better answer that came to you afterwards
- An interesting question the interviewer asked (helps for the next interview)
These notes are gold a month or two later when you apply somewhere else. You'll see the same question types again.
If you don't hear back, a polite follow-up after 7-10 days is fine. A one-line "I wanted to check on the status of the process" is enough. After two follow-ups with no answer, the process has quietly ended; stop chasing.
Salary Hangs Off the Interview
The interview ends in an offer. A mistake here lets months of preparation evaporate in a 30-minute conversation.
A few rules:
- Don't say the first number: When asked "what's your expectation," don't drop a number; ask "what's your band for the position?"
- If forced, give a range: A single number leaves no room; a range gives flexibility. But the bottom of the range has to be a number you'd actually accept.
- You don't have to answer "what do you make now." This question is standard at some companies, illegal at others. If you don't want to share, redirect: "Independent of my current salary, my expectation for this position is X."
Detailed negotiation methods are in the first salary negotiation guide and the counter-offer guide.
Closing
Interview prep isn't grinding LeetCode. It's knowing the format ahead of time, practicing for that format specifically, preparing your stories, and accounting for the offer stage at the end.
In the Türkiye software market, interview processes are converging but they're not single-format like FAANG. Walking in without knowing the company type wastes your effort; walking in informed often turns into an offer above your technical level.
Browse the getSalary dashboard to see salaries by role and company type, and check where your post-interview offer lands in the market.