Ali Rezaiyan - Senior Software Engineer

01 — Selected work

Products I've built and shipped

Lexicon — a vocabulary app for Android, iOS & web

Save the words you want to learn and practice them in short review sessions. Paste in a text and let AI pull out the words for you. One Kotlin Multiplatform codebase.

Kotlin Multiplatform
Compose
Spring Boot

Read the case study

2021 — nowAndroid Trading at BitpandaLeading revenue-critical trading features on an investing app with 8M+ users, from RFC to rollout and monitoring.Android
2026Ledger: Claude Code Cost DashboardTracks what my Claude Code sessions cost by reading the local session files. CLI, REST API, and web dashboard, running on a Raspberry Pi.TypeScript
2025Kalendar: Compose Calendar WidgetsAn Android home screen calendar widget with public holidays and both Gregorian and Persian dates.Android
2024Galactic Collectibles DAppAn Ethereum marketplace where every planet is a one-of-a-kind NFT.Web3
2024Udacity Blockchain Developer NanodegreeWhat I learned about smart contracts, web3 tooling, and decentralized storage in Udacity's blockchain program.Blockchain
2019 — 2021Neshan Maps PlatformSplitting Neshan's Android app into modules, working on the Map SDK, and automating releases.Android

02 — Giving back

Mentorship, CV reviews and open source

03 — Writing

Notes on Android, architecture and AI tooling

All posts

04 — YouTube

Videos on Android, architecture and tech careers

All videos

My channel, Otago Tech, has 3.47K subscribers, 30 videos and 23 shorts. Here are the most watched ones.

05 — About

Android at the core, system design around it

I'm a Senior Software Engineer with more than ten years of experience building production apps. Android is my core, and my strength is the system around it: architecture, API design, and the technical decisions that keep a product reliable and easy to change as it grows.

At Bitpanda I've led trading features like Staking, Margin Trading and Real Stocks for a platform with 8M+ users, from the RFC to production rollout and monitoring. I work closely with backend on GraphQL contracts and with designers on the design system, and I led my team's adoption of AI-assisted development with Claude Code.

Before Bitpanda I modularized the Neshan maps app and worked on its Map SDK, and built commerce and booking apps at several companies. Outside work I build Lexicon, an open-source Kotlin Multiplatform app, and mentor developers on ADPList.

Full background

Experience

Bitpanda2021 — nowSenior Software Engineer
Neshan2019 — 2021Senior Android Developer
Tiara Studio2018 — 2019Android Developer
Eghamat24, Frotel, Mr2App2015 — 2018Android Developer

Toolbox

Kotlin
Android
Jetpack Compose
Kotlin Multiplatform
Coroutines & Flow
GraphQL (Apollo)
System design
Clean Architecture
Spring Boot
CI/CD
Datadog & Firebase
Testing (JUnit, MockK)
Agentic workflows

Experiments

Small web tools I built to try out ideas. Free to use.

SortvisBubble, merge, quicksort and a few others, run on the pixels of an image so you can watch each step.

TTS BrowserEvery text-to-speech voice your browser has, so you can play them side by side.

Hiring?

I'm looking for my next role

If you think I could be a good fit for your team, send me a message.

Get in touch LinkedIn

Roles: Senior Android Engineer, Senior Mobile / KMP Engineer, Staff or Lead Android Engineer
Where: Remote in the EU, or hybrid / on-site in Vienna
Experience: 10+ years, Android since 2015
Languages: English (fluent), German (intermediate)

06 — Contact

Let's talk

Send me a message and I'll get back to you. You can also reach me directly: