SYS.ONLINE  //  41.0082°N 28.9784°E — ISTANBUL

İBRAHİM KASAPOĞLU

SENIOR SOFTWARE ENGINEER / MOBILE SYSTEMS

Ten years shipping software that survives production — mobile apps with 1M+ users, a zero-knowledge encryption platform, and AI pipelines that actually ship.

EXPLORE THE SYSTEMS GITHUB LINKEDIN
0+ YEARS IN
PRODUCTION
0M+ USERS
REACHED
0K DAILY ACTIVE
USERS
0+ PRODUCTION
APPS
1ST AI HACKATHON
TEKNASYON ’25

DEPLOYED SYSTEMS

The vitrine — flagship platforms, a game bay and client deliveries. All engineered, shipped and operated end-to-end.

FLAGSHIP PRE-LAUNCH

SYNQIN

ZERO-KNOWLEDGE FILE TRANSFER PLATFORM

File & text sharing where the server knows nothing. Everything is encrypted before it leaves the device — the platform moves ciphertext, never content.

  • Client-side E2EE — per-file content keys
  • Device trust flows, recovery paths, public & QR shares
  • One Kotlin Multiplatform codebase → Android · iOS · desktop · web
  • Self-operated fleet — Docker Swarm, Cloudflare R2, health-gated deploys
Kotlin MultiplatformE2EEFlaskPostgreSQLRedisTerraform
[ MEDIA SLOT ]
synqin-desktop.mp4 / .png
[ SLOT ]
synqin-phone
FLAGSHIP IN ORBIT — R&D

SUPPREAD

AI READING & VOCABULARY ENGINE

An AI content engine that writes CEFR-levelled reading material — and a reading experience that teaches the words you don’t know yet.

  • LLM drafting fenced by deterministic validation & bounded repair loops
  • Human approval gates before anything reaches a reader
  • Context-aware word lookup & sentence translation
  • Shared Compose Multiplatform UI — mobile, desktop, web
LLM PipelineFastAPIPostgreSQLCeleryCompose MPFirebase
[ MEDIA SLOT ]
suppread-desktop.mp4 / .png
[ SLOT ]
suppread-phone

◈ GAME BAY — TURSU GAMES / IKOUP STUDIOS

PUBLISHED MOBILE GAMES
[ GAME FOOTAGE ]
carcle.mp4 / .png

CARCLE

ARCADE
[ GAME FOOTAGE ]
dont-rush.mp4 / .png

DON’T RUSH

ARCADE
[ GAME FOOTAGE ]
corpie.mp4 / .png

CORPIE

CASUAL
[ GAME FOOTAGE ]
wordhook.mp4 / .png

WORDHOOK

WORD PUZZLE

◈ CLIENT ORBIT — FREELANCE DELIVERIES

DESIGN → BUILD → DEPLOY

FLIGHT LOG

  1. NOW ACTIVE MISSION

    Product & Platform Engineer — Synqin (independent)

    • Building a zero-knowledge, E2EE file & text sharing product — Android, iOS, desktop and web from one Kotlin Multiplatform codebase, Python/Flask services behind it.
    • Designed the full encryption model: per-file content keys, device trust flows, recovery paths, public/QR sharing.
    • Run the whole platform solo — Docker Swarm, Cloudflare R2, AWS, Terraform/OpenTofu, health-gated deploys with rollback workflows.
    Kotlin MultiplatformFlaskPostgreSQLRedisCloudflare R2Terraform
  2. 2020 — 2026

    Senior Android Engineer — Teknasyon · Istanbul

    • Worked across 7+ production Android products — 1M+ users, up to 50K DAU — designing scalable MVVM/MVI, modular, offline-first architectures.
    • Cut cold-start time by ~50% with Android Profiler & Perfetto; reduced Compose recomposition cycles from thousands to tens.
    • Built end-to-end ML systems: TensorFlow → TF Lite on-device inference, plus AWS SageMaker/Lambda cloud inference services.
    • Created internal AI-assisted engineering workflows — Jira intake, code-review support, changelog generation, guarded run/debug flows.
    KotlinJetpack ComposeCoroutines · FlowFirebaseTensorFlow LiteAWS
  3. 2017 — 2020

    Mobile Software Engineer — Techlife Software Solutions · Istanbul

    • Led multiple mobile projects from concept to production — development, release and maintenance, on both Google Play and the App Store.
    • Built Android apps in Kotlin/Java, contributed to iOS in Swift.
    • Developed a real-time optical exam reader with Unity3D, C# and OpenCV — camera-based mark recognition, analysis and reporting.
    KotlinJavaSwiftUnity3DOpenCV
  4. 2019

    Android Development Instructor — Turkcell Geleceği Yazanlar

    • Delivered 100+ hours of Android training — fundamentals, architecture, clean code and modern development practice.
    TeachingAndroidClean Code

MISSION BRIEF

İbrahim Kasapoğlu at his battlestation — six monitors of code drifting somewhere in deep space
FIG.01 — THE OPERATOR, SOMEWHERE IN THE ORION ARM

I’m İbrahim — a senior software engineer based in Istanbul with 10+ years across the stack. My home turf is mobile: I’ve architected and tuned Android products used by over a million people, cutting cold-start times in half and taming Jetpack Compose recomposition from thousands of cycles down to tens.

These days I also fly solo missions. I’m building Synqin — a zero-knowledge, end-to-end encrypted file transfer platform spanning Android, iOS, desktop and web from a single Kotlin Multiplatform codebase, backed by a Python fleet I deploy and operate myself on Docker Swarm, Cloudflare and AWS.

I care about the unglamorous things that make software feel great: startup time, memory, offline behaviour, failure paths, the cost of a Firestore read. If it ships to real users, it’s my kind of problem.

1ST PLACE — TEKNASYON AI HACKATHON 2025 3RD PLACE — INDIR.COM APP COMPETITION 2016

INSTRUMENTATION

◈ MOBILE FLIGHT SYSTEMS

KotlinAndroidKotlin MultiplatformCompose MultiplatformJetpack ComposeCoroutinesFlowJavaSwift · UIKit

◈ BACKEND & INFRA

PythonFlaskFastAPIPostgreSQLRedisCeleryDockerGitHub ActionsCloudflareAWSTerraform · OpenTofuFirebase

◈ AI & VISION

LLM PipelinesTensorFlowTensorFlow LiteOpenCVAWS SageMakerModel Quantization

◈ PRODUCT & GROWTH

Unity · C#RevenueCatAppsFlyerAdjustAppLovin MAXFigmaProxyman

OPEN CHANNEL

Have a mission in mind — a product to build, a codebase to rescue,
a team that needs senior firepower?

ikasapogluu@gmail.com
GITHUB LINKEDIN

ISTANBUL · UTC+3 · LOCAL TIME --:--:--