Mobile System Design

By the author of the Mobile System Design and Swift in Depth books

Ship faster without rewrites

If your mobile app slows down as the team grows… I help you fix architecture and flow so you can deliver quickly again.

Led the scaling of a major bank's iOS app from a monolith to a modular architecture supporting 60+ developers

  • Fix architecture debt without stopping feature development
  • Align iOS and Android teams for consistent delivery
  • Build systems that scale with your team growth
Contact me See how I can help

Sound familiar?

You might be dealing with...

  • Slow feature releases due to architecture decisions from 2 years ago
  • iOS and Android drift creating inconsistent user experiences
  • Struggling to have teams work in isolation
  • Pressure to deliver from leadership, yet held back by the codebase
  • Scaling cracks appearing in your mobile architecture
  • Struggling to adapt to new requirements

Teams bring me in when...

  • A big change needs speed without regressions
  • They're debating a rewrite vs. architectural fixes
  • Figuring out strong modular architectures
  • Want to improve their way of working

Experience that matters

With 15+ years of mobile experience including Staff Engineer at Twitter and iOS Tech Lead at ING Bank, I understand the challenges of scaling mobile architecture in high-stakes environments.

How I can help

Most teams hire me for:

Hands-on Development

Project-based
Price upon request

I also offer development work, such as:

  • Delivering features
  • Refactoring hard-to-move legacy areas
  • Prototyping architectural improvements
  • Unblocking engineers on the "hairy parts" of the codebase
Discuss project
Most Popular

Mobile System Design Workshop

1–2 days
€3,900 - €7,900

Transform your team's approach to mobile architecture in 1-2 intensive days

  • How to design and balance reusable components
  • How to survive inevitable UI changes
  • Better architectures and modular app designs
  • Common mobile architecture anti-patterns to avoid
  • Practical exercises with your team's challenges

Photo courtesy of OpenReply

Check availability

Embedded Mobile Architect

Weekly
Starting at €1,000/week

Your technical partner preventing architecture debt and keeping teams aligned

  • Weekly on-site or remote team check-ins
  • Direct collaboration on features and architecture decisions
  • Code reviews and technical mentoring
  • Cross-team alignment and knowledge sharing
Check availability

Speaking & Presentations

I also speak at team events, meetups, and conferences on modern mobile system design, architecture patterns, testing, design systems, and scaling teams.

GOTO; conference presentation

Mobile Architecture Audit

Sometimes you need an outside perspective to see what's really holding your team back. I'll dive deep into your codebase, talk with your engineers, and give you a clear roadmap to get unstuck. Perfect when you're debating a rewrite or need to convince leadership that architectural changes are worth the investment.

Get audit proposal

Let's discuss your challenge

Tell me about your team challenges and I'll let you know whether I can help.

Schedule a call or Send message below

Get In Touch

I typically respond within 24 hours on weekdays.

Or email me directly at [email protected]

About me

Tjeerd in ’t Veen is a mobile engineer who challenges the way we create mobile applications.

With over 25 years of software development experience and 15 years in mobile engineering, including roles as a staff engineer at Twitter (now X) and as a mobile tech lead at ING international bank, he possesses expertise in developing mobile applications with scalability, adaptability, and robustness.

Tjeerd is the author of the Mobile System Design book and the highly-rated book Swift in Depth.