NATIVE iOS & ANDROID APPSfrom idea to release.

I help small and mid-sized companies build new apps and evolve existing products — pragmatic, clean, low-maintenance.

  • 25+ years — Product & software development
  • Swift & Kotlin — Modernisation & greenfield
  • iOS & Android — from one source — optional shared core
Free initial consultationLearn more

Service

Senior experience meets agent coding: thoughtful architecture and clean code, delivered at a speed traditional development can't keep up with.

    • –From idea/requirement to clickable prototype and MVP
    • –iOS & Android delivery including store release

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Process

Transparent, iterative, with clear deliverables and no endless specification documents.

1

Quick check

30–45 min

Clarify goal, users, success criteria and constraints. Outcome: clear go/no-go recommendation + next step.

2

Scope & plan

1–3 days

Set priorities, identify risks. Outcome: rough release plan + backlog broken into understandable packages.

3

Delivery

iterative, visible weekly

Development in short cycles with regular demos and builds. Outcome: continuously usable intermediate states instead of a “big reveal” at the end.

4

Release & evolution

Prepare store release incl. build, tests, metadata and review flow. Outcome: app is live — and can be cleanly evolved.

Quality

So your app doesn't just ship — it stays stable and evolvable for the long run.

01

Native UX that feels right

  • –iOS follows iOS, Android follows Android — look & feel, patterns, performance
  • –Focus on fast, fluid UI and clean states
02

Low-maintenance instead of “refactor later”

  • –Clear architecture and clean module boundaries
  • –Changes stay predictable, even as the team grows
03

Measurable quality

  • –Automated tests where they reduce risk
  • –CI/CD, reproducible builds, clear release paths
04

Reliable in production

  • –Crash/error analysis, monitoring fundamentals, clean logging
  • –Stabilisation and performance optimisation as part of evolution
05

Efficient delivery without quality loss

  • –I use AI tools deliberately for routine work (e.g. analysis, test/refactor support)
  • –Decisions, code quality and review stay human and traceable

Tech Stack

Idea
Development
Release

Projects

Each of these projects had a different starting point. They all share one thing: a delivered outcome that holds up.

  • Project

    AI-powered day planner, designed and shipped as a product.

    My contribution

    Architecture + implementation, shared core for iOS/Android, IAP/RevenueCat, backend (Swift Vapor), analytics.

    App StorePlay Store

Your project could be the next one

Let's spend 30 minutes clarifying whether and how I can help — no obligation, no cost.

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Hi, I'm
Tino Rachui

Tino Rachui

I'm a senior mobile engineer and hands-on software architect for iOS and Android. For over 25 years I've been building digital products — from legacy modernisation to greenfield. The last 15 years my focus has been native app development, Kotlin Multiplatform, and SDKs/platform components in demanding environments.

I work in a structured, pragmatic and transparent way — with the goal that your product stays stable long-term and can be evolved quickly.

iOS: Swift / SwiftUI · Android: Kotlin / Jetpack Compose

Modernisation & stabilisation of large codebases

KMP/SDKs + test & delivery focus (CI/CD, E2E where it makes sense)