How to Prepare for a Software Developer Interview in 2026

How have software developer interviews changed with AI?

Interviews have shifted from “can you write this code?” towards “can you reason about it, explain it and judge it?” This is a trend I see across companies rather than a universal rule, and it is still uneven. Some firms have barely changed their process; others have rebuilt it.

The changes most candidates meet in 2026:

• More live and pair coding. Interviewers watch you work in real time, because a polished solution on its own says little when AI tools can produce one.
• Take-homes with explicit AI rules. Some allow AI and judge your result and your notes on how you used it. Others ban it. Read the instructions twice and follow them exactly.
• More emphasis on explaining and reviewing. You may be handed a pull request or a block of generated code and asked what is wrong with it.
• AI-assisted cheating detection. Companies increasingly watch for unusual pauses, reading from a second screen, or answers that do not match how you talk about them. Some run proctored assessments.

The practical lesson is simple: be someone who understands the code you write, whoever or whatever typed it. If you want the wider picture of how AI changes the work itself, read what to learn as a software developer in 2026.

What are the stages of a software developer interview?

Most processes combine some or all of eight stages. Smaller Kenyan companies often compress them into two or three conversations; larger and foreign companies usually run most of them.

Ask the recruiter at the start which stages to expect and how long each lasts. Good recruiters tell you, and it lets you aim your preparation.

How should I prepare for a software developer interview in 2026?

Prepare for four to eight weeks, split between problem solving, your own projects, design and speaking out loud. Here is a six-week plan; stretch it to eight if you are starting from scratch, or compress it if you code every day.

1. Week 1: Audit and fundamentals. Update your CV, tidy your GitHub, and list the topics you are weakest on. Revise arrays, strings, hash maps and Big-O.
2. Week 2: Core patterns. Two pointers, sliding window, binary search (O(log n)), stacks and queues. Solve a few problems per pattern, then re-solve them a few days later without notes.
3. Week 3: Trees, graphs and recursion. Depth-first and breadth-first traversal, then simple dynamic programming. Begin timed sessions of 30 to 45 minutes.
4. Week 4: Your domain. For mobile, go deep on the topics in the next section. For backend, go deep on databases and APIs. Rebuild a small feature from memory.
5. Week 5: System design and behavioural. Practise two or three designs on paper. Write your STAR stories. Do your first full mock interview.
6. Week 6: Mocks and polish. Two or three mock interviews with a person, review your weak spots, research each target company and prepare your questions for them.

Short daily sessions beat weekend marathons. Practising out loud matters more than most people expect, because the interview is a spoken exercise.

What is the best framework for a live coding interview?

Use the same seven steps every time: clarify, examples, brute force, optimise, code, test, complexity. A fixed routine keeps you calm and shows the interviewer how you think, which is usually what they score.

1. Clarify. Restate the problem. Ask about input size, duplicates, empty input and what to return when there is no answer.
2. Examples. Write one normal case and one edge case.
3. Brute force. Say the obvious solution and its cost, even if it is slow. It proves you can solve it.
4. Optimise. Look for what repeats. A hash map often turns a nested loop into one pass.
5. Code. Write clean, named variables and narrate as you go.
6. Test. Walk your examples through the code by hand. Fix bugs calmly.
7. Complexity. State time and space cost, and mention trade-offs.

Here is the classic “two sum” problem in Kotlin. The brute force checks every pair in O(n²); the hash map version is O(n) time and O(n) space.

fun twoSum(nums: IntArray, target: Int): IntArray? {
    val seen = HashMap<Int, Int>() // value -> index
    for ((i, n) in nums.withIndex()) {
        val need = target - n
        seen[need]?.let { return intArrayOf(it, i) }
        seen[n] = i
    }
    return null // no pair found
}

If you get stuck, say so and describe what you have tried. Interviewers generally help candidates who communicate and mark down those who go silent. More on why these skills last in why data structures and algorithms matter.

What mobile developer interview questions should I expect?

Expect questions on lifecycle, state, concurrency, memory, offline behaviour, architecture and releasing to the stores. Interviewers want trade-offs and examples from real apps, not definitions.

• Lifecycle. What happens to your screen on rotation, backgrounding or process death? Where do you save state? Android activity and fragment lifecycles and iOS view controller or SwiftUI lifecycles all come up. The official Android developer documentation and Apple developer documentation are the primary sources.
• State management. Where does state live, and how does the UI react? Be ready to compare ViewModel with StateFlow in Compose, or @State and @Observable in SwiftUI.
• Concurrency. Kotlin coroutines and dispatchers, Swift async/await and actors. Explain main-thread rules, cancellation and what a race condition looks like.
• Memory leaks. Retain cycles in Swift closures, leaked Android contexts and listeners that are never removed. Say how you would find one with a profiler.
• Offline and poor networks. Local cache, retry with backoff, queued writes and syncing. In Kenya this is a daily reality, and apps that integrate M-Pesa through the Daraja API must handle a dropped connection mid-payment without double charging.
• Architecture. Explain MVVM, why you separate UI from business logic and how it helps testing. Be honest about when it is overkill.
• App store. Signing, versioning, staged rollouts, review rejections and crash monitoring. Few candidates can talk about this, so it stands out.

Low-end devices come up often in East African interviews. Mentioning app size, startup time and memory on cheap Android phones shows you build for real users.

How do I answer behavioural questions with STAR?

Structure each answer as Situation, Task, Action, Result, and spend most of your time on the action and what you learned. Keep it to about two minutes.

• Situation: one sentence of context.
• Task: what you were responsible for.
• Action: what you did, in first person, with the reasoning behind your choices.
• Result: the outcome, ideally measurable, plus what you would change.

Prepare five stories: a hard bug, a disagreement with a teammate, a project that failed or slipped, something you learned quickly, and something you shipped end to end. Most behavioural questions can be answered by adapting one of them. Do not invent achievements; interviewers probe with follow-up questions and the gaps show.

What should my CV, GitHub and portfolio show?

They should show that you ship working software. A published app with real users beats a stack of course certificates, because it proves you handled the messy parts: signing, bugs, reviews and feedback.

• CV: one page, projects first if you lack experience, each with a link and one line on the result or the technical challenge.
• GitHub: pin two or three repositories with a clear README, screenshots, setup steps and tests. Delete or hide abandoned experiments.
• Portfolio: a Play Store or App Store link, or a TestFlight or APK demo, plus a short write-up of one decision you made and why.
• Certificates: list them briefly. They support a CV but rarely carry it.

Be ready to explain every line of every project. If AI helped you write part of it, say so plainly and show that you understand it.

How do remote developer interviews work from Kenya?

Remote interviews follow the same stages, with extra attention to communication, time zones and how you will be employed. Foreign companies hiring in Kenya want proof that you can work independently and write clearly.

• Time zones. Nairobi is UTC+3 all year with no daylight saving. European teams overlap comfortably; US teams need an evening or early-morning window. State your availability honestly.
• Async communication. Expect questions on how you write status updates, ask for help and document decisions. Good written English is a real advantage.
• Contractor or EOR. You will usually be engaged either as an independent contractor or through an employer of record that hires you locally on the company’s behalf. Ask which applies, how and in what currency you are paid, and who handles tax and statutory contributions. Check Kenyan requirements for your situation.
• Practical setup. Reliable internet, a backup connection or power, and a quiet space. Test your camera and screen sharing before each call.

For local roles, expect more conversation about the product and a faster process. Banks, telcos, fintechs and startups in Nairobi value M-Pesa and mobile money experience, Android depth and the ability to work with constrained networks.

How can I use AI to prepare without cheating?

Use AI as a practice partner before the interview, and follow the stated rules during it. Preparation use is fine. Hidden use in a live or assessed round is cheating, and it is increasingly easy to spot.

When AI is allowed, show judgement: tell the interviewer what you asked, what you changed and what you rejected. That is the skill employers now want. You can read more in AI agents in software development.

How do I negotiate an offer and handle rejection?

Negotiate politely with evidence, and treat every rejection as practice data. Both are skills you improve with repetition.

1. Thank them and ask for the offer in writing, with the full package: salary, bonus, leave, equipment, review cycle and contract type.
2. Take a day or two to respond. Research realistic ranges for the role and market from several sources rather than one.
3. Ask for what you want in one clear message, and give reasons tied to your skills and the role’s scope. Non-salary items such as a learning budget or a review date are often easier to win.
4. If you have competing offers, be honest about them. Never bluff.

For rejections, ask for feedback once, politely. Write down which stage you failed and what question beat you, then add it to your plan. Almost every working developer has been rejected many times. Consistent practice, mock interviews and a growing portfolio change the odds over months, not days. If you want structured practice, the live tracks at Bridgetree Learn include weekly DSA problem sets and mock interviews.

Frequently asked questions

Kevin Lagat

Founder and lead instructor at Bridgetree Learn. Former Senior iOS Engineer at Safaricom, where he worked on the M-PESA app. He has shipped production apps for the UK's NHS, a Saudi digital bank and US SaaS companies, and trained Saudi Digital Academy cohorts through Coding Dojo. LinkedIn · GitHub