Services

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I help companies build high-quality mobile experiences by combining deep technical expertise with strong product thinking.

Mark.r.sh Apps

Mark Robert Sindoni Houghton, PhD

I’m Mark, a mobile developer, app founder & IT consultant based in Italy. I'm the author of this blog (markrsh.com), and I'm building a suite of mobile apps that offer in-app purchases and subscriptions. I'm also available to hire for services such as proof of concept and application development, technical writing, and IT consulting.

Services

I’m a senior mobile engineer (iOS + Flutter) with a background in UK consulting, and I specialise in end-to-end ownership: architecture, delivery, analytics, payments, onboarding, and subscription optimisation.

Unlike traditional agencies or off-shore developers, I work as a strategic technical partner - diagnosing issues, improving conversion flows, and accelerating delivery while ensuring long-term maintainability. My approach is hands-on, transparent, and focused on measurable outcomes for the business.

I’m ideal for teams that need a specialist to lead a vertical, modernise a mobile codebase, or deliver a key feature quickly and correctly.

Packages

(under construction 🏗️)

Mobile Architecture Audit + Action Plan

  • Full review of app architecture (SwiftUI/Flutter)
  • Dependency review, state management, performance
  • Code quality + modularisation assessment
  • Diagnostics on crashes, performance spikes, rebuild issues
  • Written report with priorities, quick wins, and a 30-day roadmap

Onboarding & Conversion Optimisation

  • Full analysis of onboarding flow
  • Identification of drop-off points
  • Redesign of key touchpoints for better activation
  • Copy improvements + analytics events
  • A/B ready recommendations

Subscription / Paywall Optimisation

  • Integration or optimisation of RevenueCat / App Store / Play Store
  • Paywall improvements
  • Intro offers & pricing strategy
  • "State management for entitlements" setup
  • Analytics tracking for user lifetime value

Mobile Engineering Mentorship & Code Leadership

  • Weekly technical input
  • Architecture decisions
  • Reviewing PRs and preventing technical debt
  • Pairing sessions with junior developers
  • Emergency debugging support

Mobile Feature Delivery Sprint

  • Notifications overhaul
  • Deep link handler
  • New paywall
  • Full settings page
  • Analytics instrumentation
  • Contact management or reminders

Connect with me

Reach out on LinkedIn for more info on my services and to check my availability.

Need a bigger boat?

If you're working on a larger project and need a team of mobile app development specialists, you can still work with me along side some of my friends at Pocketworks