AS

(a) — field notes, entry 001

Portrait of Alexandros Stergiou

Building the parts of mobile apps you never notice.

I'm Alexandros — CTO at Tapp and CEO/CTO of Wanilla, a patented mobile applications developer with deep experience in native iOS, architecture and product craft. I turn complex requirements into software that feels natural to use.

Current

Tapp & Wanilla

CTO at Tapp · CEO/CTO of Wanilla — architecture, product, security and UX across both

Approach

Technology leader with an engineer's craft — CTO at Tapp, CEO/CTO at Wanilla, and a patented software engineer focused on turning complex requirements into clear experiences.

Reach

London, United Kingdom
LinkedIn

Selected work

Abstract visual for Tapp project

Tapp

2025 — now

CTO

Growth loops, built in

CTO of Tapp's affiliate and referral SDK for mobile apps — wiring attribution, referrals and viral loops so every user becomes a growth channel.

ArchitectureSecurityProduct
Visit company
Abstract visual for Wanilla project

Wanilla

2016 — now

CEO / CTO

AI-built apps, launched

Founded and lead Wanilla, a patented App Store launch and growth partner for AI-built apps — taking products from build to store and beyond.

FounderNative iOSPlatform
Visit company
Abstract visual for Trainline project

Trainline

2024 — 2026

Senior iOS Developer

Travel, made native

Worked across interface, networking, data and architecture on Trainline's iOS application, using Swift, SwiftUI and server-driven UI.

SwiftSwiftUIServer-driven UI
Visit company
Abstract visual for Ford project

Ford

2017 — 2020

Lead iOS Developer

Connected cars, clearly

Led native iOS work across vehicle status, service events, maps and onboard-computer interactions, from architecture through implementation.

SwiftRxSwiftCoreData
Visit company

(c) — skill taxonomy

Leadership

CTO / CEO · Platform architecture · Product planning · Security · Client communication

Native iOS

Swift · Objective-C · UIKit · SwiftUI

Architecture

Server-driven UI · MVVM · Viper

Practice

Protocol-oriented design · RxSwift · TDD · Pair programming

Beyond mobile

Vapor · Fluent · JavaScript · HTML · CSS

(d) — background

Computer Science

Athens University of Economics and Business, 2003—2008

Patented software engineer

Holder of a granted software patent

Languages

Greek · mother tongue
English · proficient
Spanish · beginner

Experience timeline

2025 — now

CTO · Tapp

Platform architecture, product planning, security, UX and client communication.

2016 — now

CEO / CTO · Wanilla

A managed App Store launch and growth partner for AI-built apps.

2024 — 2026

Senior iOS Developer · Trainline

Interface, networking, data and architecture across the iOS application.

2023 — 2024

Lead iOS Developer · BP

Global server-driven iOS architecture and cross-functional technical leadership.

2022

Senior iOS Developer · Global Radio

Native interface, networking, data and architecture.

2021

Senior iOS Developer · Zenly

User-interface engineering across core social features.

Jan — Apr 2021

Senior iOS Developer · Claro

Contract role: theme updates across the iOS app after the company's rebranding.

2017 — 2020

Lead iOS Developer · Ford

Connected-vehicle architecture and implementation across iOS and Android teams.