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Baran Nacar

Android & Kotlin Multiplatform Developer

I spent nearly five years on Android TV and Google TV R&D at Beko (Arçelik Group). Now I build and ship my own apps and games for Android and iOS with Kotlin Multiplatform and Unity.

See projectsContact

Istanbul, Turkey

Smeltara smithy workshop seen from above, with workers crafting goods
Quiz Flux category screen with a Start Quiz button
High Three card table in the middle of a game
~5years at Beko
Android TV and Google TV R&D, Nov 2020 to Sep 2025
3apps on Google Play
Quiz Flux, Smeltara and High Three, published as Nacar Apps
2apps on the App Store
Quiz Flux and Smeltara. 1 more in App Store review
3platforms
Android, iOS and Android TV / Google TV

Apps I build and ship

Three apps and games I built, tested and published on my own under Nacar Apps.

Quiz Flux app icon

Quiz Flux

Daily trivia game5 languages

Cosmic Arcade-themed daily quiz with leaderboards, jokers, and rewards.

Google PlayApp Store
  • Kotlin Multiplatform
  • Compose Multiplatform
  • Coroutines / Flow
  • Ktor
  • SQLDelight
  • Firebase
  • Cloud Functions
  • GitHub Actions

What I built

  • Kotlin Multiplatform app for Android and iOS: the data, domain and ViewModel layers are shared Kotlin code, with platform services behind expect/actual and Swift bridges.
  • Firebase backend with TypeScript Cloud Functions for server-side score validation, reward claims, friend requests and account deletion. The callable functions enforce App Check, and the Firestore rules are tested on the emulator.
  • Leaderboards, friends, achievements and 5 languages, built with Compose Multiplatform and MVVM, Ktor networking, kotlinx.serialization and a SQLDelight question database.
  • 628 unit and 131 instrumented tests, GitHub Actions CI/CD on self-hosted Windows and macOS runners, and a release ledger that ties every store build to its source commit.
  • Quiz Flux: a timed trivia question with four answer choices and the joker bar
  • Quiz Flux: category picker with General Knowledge selected and the Start Quiz button
  • Quiz Flux: achievements and daily streak rewards
  • Quiz Flux: home screen with power-ups, today's boost and daily missions
Smeltara app icon

Smeltara

Idle blacksmith management game7 languages

Build your smithy across 3 cities, craft 72 goods, and upgrade 18 workshops.

Google PlayApp Store
  • Unity 6
  • C#
  • URP
  • Unity Gaming Services
  • Unity IAP
  • Cloudflare Workers
  • AdMob

What I built

  • Unity 6 (URP, C#) with a fully procedural scene: one bootstrap builds the camera, world, UI and managers in code, and the systems talk through events.
  • Atomic saves (write to .tmp, replace, recover from .bak) with versioned forward migrations that never drop player progress, plus Cloud Save on Unity Gaming Services.
  • Server-side purchase ledger on Cloudflare Workers and D1 that verifies Google Play orders, grants each purchase token once and handles refunds.
  • Economy balanced with a deterministic simulator. A headless PlayMode smoke test and Editor audits check the build, among them localization parity across 7 languages and a class size limit.
  • Smeltara: a smithy workshop seen from above, with workers crafting goods
  • Smeltara: the upgrade panel of the Axe station at level 48
  • Smeltara: the workshop in the city of Saltmarch
  • Smeltara: the workshop in the snowy city of Frostholm
High Three app icon

High Three

Turkish trick-taking card game2 languages

Win the threes, rule the trump: a Turkish card game against three fair bots.

Google PlayApp StoreIn App Store review
  • Unity 6
  • C#
  • .NET
  • NUnit
  • ISMCTS
  • Play Games Services
  • Game Center

What I built

  • Pure C# rules core with no Unity reference: deterministic and seeded, commands in and events out. The same code runs the game, the bots and headless simulations, and builds as plain .NET.
  • Fair bots: each bot sees only what its own seat can see, never the hidden cards. The hardest level samples the possible hidden hands, searches each one (PIMC or ISMCTS) and solves the last tricks exactly.
  • Difficulty levels tuned by measured bot-vs-bot simulation against target win-rate bands.
  • About 990 NUnit tests in 17 test assemblies, plus architecture tests for layer rules. Version 1.0 sends no data off the device, and a release check confirms that no ad, analytics or crash SDK is in the build.
  • High Three: the card table mid-game, with the trump card and the player's hand
  • High Three: end-of-deal summary with a double win for 2 points, card points and unlocked achievements
  • High Three: a bot reacting with a speech bubble during play
  • High Three: new game screen to choose one of three bot opponents and a target score

Experience

  1. Nacar Apps

    My own apps and gamesIstanbul, Turkey

    1. Apr 2026 - Present

      Independent Mobile Developer

      • Build and publish my own apps and games for Android and iOS: Quiz Flux with Kotlin Multiplatform, Smeltara and High Three with Unity.
      • Own every stage myself: architecture, backend, testing, CI/CD, store listings and releases on Google Play and the App Store.
      • Run Firebase and Cloudflare Workers backends, ads behind Google UMP consent, and in-app purchases verified on the server.

  2. Beko (Arçelik Group)

    Android / Google TV R&DIstanbul, Turkey

    1. Apr 2023 - Sep 2025

      R&D Senior Specialist Software Engineer

      • Led Kotlin and Java development of Android TV applications shipped on Arçelik, Beko, Grundig and Altus models across Europe, Turkey and MENA, using MVVM and reusable components.
      • Owned end-to-end over-the-air (OTA) update flows and coordinated software releases with QA, product and hardware teams under Google TV certification requirements.
      • Investigated production failures through Logcat and device-level debugging, and coordinated root-cause analysis of C-level driver defects with the chipset partner.
      • Mentored junior engineers through code reviews, pair programming and guidance on Android architecture and clean code.

    2. Aug 2021 - Apr 2023

      R&D Specialist Software Engineer

      • Developed Channel Editor and Easy Channel Installation: antenna, satellite and cable scanning, channel-list handling and CI CAM support for encrypted broadcasts.
      • Supported Netflix, Prime Video and HBO integrations through partner test suites, playback validation and defect investigation across multiple TV models.
      • Turned QA and field reports into reproducible issues, investigated application and platform behavior, and coordinated fixes with chipset and platform partners.

    3. Nov 2020 - Aug 2021

      Project Engineer

      • Built the first Android TV Channel Editor with move, delete, skip, rename and favorites operations, and validated it before QA and production releases.
      • Tested hardware-software integration across satellite, cable, USB, Ethernet and Wi-Fi inputs, and supported OTA validation across four TV brands.

Products I contributed to at Beko

Store-listed products from my time on the Android / Google TV R&D team.

Android, iOS

Smart Remote

The shared TV remote app behind the Arçelik, Beko and Grundig releases, where I supported maintenance and bug fixing. It covers TV control over the local network, text input, channel navigation and app launching.

ArçelikGoogle PlayApp Store
BekoGoogle PlayApp Store
GrundigGoogle PlayApp Store

Android, iOS

RemotEasy

Mobile remote for Arçelik, Beko and Grundig Android and Google TVs: local-network device discovery, PIN pairing, remote navigation and customizable shortcuts.

Google PlayApp Store

Android TV

Arçelik Channel, Grundig Channel

Content-discovery and app-access applications for Android TV.

ArçelikGoogle Play
GrundigGoogle Play

Android TV projects

  • Channel Editor

    Channel move, delete, skip, rename and favorites, plus channel-list import and export.

    Java, Kotlin, Leanback, Room

  • Easy Channel Installation

    Basic and advanced setup modes with background channel detection.

    Java, Kotlin, background services

  • Sound Personalization

    Guided TV sound tuning based on room placement, with audio and visual cues.

    Kotlin, animations, audio APIs

  • Picture Personalization

    Guided brightness, contrast, color-tone and gamma adjustments using reference images.

    Kotlin, custom UI

  • TV Booster

    Unused-file cleanup, RAM pressure reduction and OLED pixel-refresh integration.

    Kotlin, system APIs

Skills

Programming languages

  • Kotlin
  • Java
  • C#
  • TypeScript
  • Python

Mobile and multiplatform

  • Kotlin Multiplatform
  • Compose Multiplatform
  • Jetpack Compose
  • Material 3
  • Coroutines / Flow
  • MVVM
  • Clean Architecture
  • expect/actual and Swift interop

Data, cloud and backend

  • Ktor
  • kotlinx.serialization
  • SQLDelight
  • Firebase Auth
  • Firestore
  • Cloud Functions (TypeScript)
  • Firestore security rules
  • Cloud Messaging
  • Crashlytics
  • App Check
  • Cloudflare Workers + D1

Testing and delivery

  • JUnit 4
  • MockK
  • kotlinx-coroutines-test
  • Instrumented tests
  • Vitest
  • NUnit
  • GitHub Actions CI/CD
  • Firebase App Distribution
  • TestFlight
  • Google Play Console
  • App Store Connect

Games

  • Unity 6
  • URP
  • Unity Gaming Services
  • Unity IAP
  • AdMob with UMP consent
  • Play Games Services
  • Game Center

Android TV platform (Beko)

  • Android TV
  • Google TV
  • Leanback
  • ExoPlayer
  • Room
  • Retrofit
  • WorkManager
  • OTA updates
  • Logcat
  • Android Profiler

Tools and workflow

  • Android Studio
  • Git
  • GitHub
  • Gradle
  • Jira
  • Confluence
  • Agile / Scrum

Education and languages

Education
Yildiz Technical UniversityBachelor's Degree in Electronics and Communication Engineering2015 - 2020
Languages
Turkish: nativeEnglish: upper intermediate (B2)
Certification
Six Sigma Green Belt