Available for hire  ·  Tokyo, Japan  ·  Remote worldwide

Nesim Tunc

Senior Software Developer with 20+ years of experience building iOS apps, cross-platform mobile systems, AI-powered products, and full-stack platforms. Platform-independent. Ships alone or leads teams.

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iOS / Swift Flutter Node.js Elixir AI / LLM Real-Time Systems Technical Architect 20+ Years

About

I've been coding since 1994, when I was 9 years old. What started as a childhood obsession turned into 20+ years of professional software development across mobile, backend, and frontend systems — for startups, enterprises, and products used by hundreds of millions.

I define myself as a platform-independent developer. I build native iOS apps in Swift and SwiftUI, cross-platform mobile in Flutter, backends in Node.js, Elixir, and C#, and I'm equally comfortable in the architectural layer above it all. I've served as a Technical Architect, Security Champion, and team lead across multiple products.

I've shipped apps to the App Store and Google Play, built real-time audio pipelines, IPTV systems, social networks, AI-powered products with multi-LLM agentic architectures, and Kubernetes management platforms. I've also competed in Microsoft Imagine Cup 2007, reaching the semi-finals among 180 teams — and earned 10+ industry awards for products I've helped build.

I contribute to open source, hold Microsoft certifications, and I'm always learning. Currently based in Tokyo, open to remote roles and contracts worldwide.

20+ Years of experience
10+ Industry awards
100M+ Users across shipped products
∞ Languages learned

Projects

Professional Highlights

RotaTalk

Voice · AI · Mobile · Full-Stack

Voice-first social network for professional truck drivers, used across multiple regions (US, EU, TR) — built end-to-end in Flutter (iOS & Android) with Node.js & Elixir backends. Real-time voice channels via LiveKit with hands-free push-to-talk, a driver social feed for road intelligence (voice posts, location tagging, community voting), live map with opt-in location sharing, and private team channels for fleet coordination.

RotaBot, the built-in AI road assistant, handles truck-safe routing via TomTom, HERE, real-time traffic & roadworks, fuel price comparison, and border crossing intelligence — powered by a multi-LLM agentic backend (Gemini, ChatGPT, Claude) with automatic fallback, per-provider budget controls, Redis-backed cost tracking, and SSE streaming to mobile. Available in 11 UI languages, 187 conversational languages. Live on the App Store and Google Play.

FlutterNode.jsElixirLiveKitSupabaseTomTomHEREGeminiChatGPTClaudeRedisDockeriOS & Android

Mekanist.net

Social · Full-Stack

A social venue search engine with 1M+ registered and active users, later acquired by Zomato. Built the entire stack end-to-end: backend, frontend, admin panel, and iOS & Android applications.

iOSAndroidBackendFull-Stack

Paravi

Streaming · Android

Japan's internet television streaming service. Android Lead Engineer in a team of 3. Managed complex API integration, high-volume JSON data processing, and high-performance UI rendering under heavy load.

AndroidJavaIPTV Streaming

Send Anywhere

iOS · Architecture

Large-scale file transfer application. Joined as iOS Architect, defining the iOS architecture from the ground up and leading development of the platform's new iOS product.

SwiftSwiftUIiOS Architecture

NTV Spor

Web · Full-Stack

The #1 sports website in Turkey. Led a team to rebuild the platform from scratch for the 2010 FIFA World Cup using .NET 4.0. Architecture still in use today. Won 8+ national awards.

ASP.NET MVCC#WCFSQL

Caffè Nero Turkey

Mobile · Backend

Transformed a paper loyalty card into a full digital system — solo, in 4 months. Delivered iOS & Android apps, backend API, and Microsoft Dynamics CRM integration for an international coffee chain.

iOSAndroidC# .NETMS CRM

Turkcell TV+

IPTV · Node.js

IPTV platform for Turkey's leading GSM operator. Built a real-time log analysis tool in Node.js using regex pattern matching on syslog to detect and surface bugs instantly for the development team.

Node.jsIPTVReal-Time

TatilSepeti.com

E-Commerce · Web

Turkey's top travel booking platform for hotels, flights, and tours. Rebuilt from scratch with a 3-person team. Architecture still in use today. Won 4+ national awards.

ASP.NETC#SQL Server

SpoTribe

Social · Flutter

Location-based social networking app where users check-in and post media. Senior Engineer on both backend (Firebase) and mobile (Flutter). Also served as Security Champion for the product.

FlutterDartFirebase

Rainkube

DevOps · Platform

An internal Kubernetes cluster management platform. Developed the distributed lock mechanism using Redis Redlock and built a complete billing system from scratch. Backend & Frontend Engineer.

Node.jsVue.jsMongoDBRedis

Carada

Healthcare · Backend

Personal healthcare monitoring system with two-way device sync, concurrency-safe architecture, and real-time chat via SignalR. Backend Lead Engineer in a team of 4.

ASP.NET MVCC#SignalRMSSQL

Open Source Contributions

Countly — iOS SDK

Open Source · Analytics

Contributed to the #1 open-source mobile analytics platform, used by billions of devices worldwide. Fixed iOS SDK bugs, added concurrency features, and provided UX feedback that shaped the Countly Cloud platform.

Objective-CSwiftiOS SDK

Periodum

Open Source · Education

Active contributor to this non-profit interactive periodic table with 400+ GitHub stars. Contributes to the backend and open-source community management for the educational science project.

BackendOpen Source

Personal Projects

CoThings

Open Source · Real-Time

Open-source real-time counter for shared spaces, built during COVID-19 to help people avoid crowded areas. Full-stack: Elixir/Phoenix backend and SwiftUI iOS app.

ElixirPhoenixSwiftSwiftUIOpen Source

SnapTix

AI · iOS

AI-powered expense tracker with OCR receipt scanning. Integrates Apple Vision Kit for text extraction and OpenAI for automatic expense categorization and tax deduction assistance.

SwiftiOSDjangoOpenAIOCR

Whispeer

Security · Messaging

End-to-end encrypted, auto-expiring messaging platform. Client-side AES (CBC + PBKDF2) encryption ensures messages are never stored or transmitted in plaintext.

Node.jsVue.jsPostgreSQLAESOpen Source

Exploristo

iOS · Location

iOS app that recommends cafes, restaurants, and points of interest along your route. Preference-based filtering via Google Maps API. Built with Swift, SwiftUI, and a Node.js backend.

SwiftSwiftUINode.jsMaps API

Skills

Mobile

iOS (Swift, SwiftUI, UIKit, RxSwift), Android (Java, Kotlin), Flutter & Dart, platform channels, offline-first, background audio

Backend

Node.js / TypeScript, Elixir & Phoenix, C# / ASP.NET, REST APIs, microservices, Supabase, real-time systems

AI & LLM

Agentic tool-calling, OpenAI, Gemini, Anthropic, OCR (Vision Kit), multi-LLM fallback, budget controls, SSE streaming, eval frameworks

Real-Time & Audio

Push-to-Talk, PCM streaming, jitter buffers, WebRTC, LiveKit, low-latency media pipelines, TURN servers

DevOps

Docker, Kubernetes, Fly.io, Caddy, GitHub Actions CI/CD, Redis (Redlock), Linux, multi-region deployments

Architecture

Clean Architecture, domain-driven design, modular layering, scalable system design, Security Champion

Databases

PostgreSQL, MySQL, MSSQL, MongoDB, Redis, Firebase, Supabase (RLS)

Frontend

Vue.js, HTML / CSS / JavaScript, React Native (Expo), responsive design

Let's Work Together

Available for senior engineering roles, technical architect positions, and freelance or contract projects. Based in Tokyo — open to remote worldwide.

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