Your iOS App Is Growing
Your Architecture Needs to Keep Up
I help companies scale production iOS applications without turning every new feature into another rewrite.
Architecture reviews, Swift modernization, performance optimization, concurrency, modularization, and technical strategy—built from 18+ years of software engineering experience.
30-minute technical conversation · No sales pitch · Senior-level guidance
Is Your iOS App Starting to Fight Your Team?
You probably don’t need another developer adding more code.
You need someone who can identify why the codebase is becoming harder to change—and what to fix before growth makes it worse.
- Your iOS app is already in production
- New features take longer than they should
- Your Swift codebase has become difficult to maintain
- Crashes or performance issues are affecting users
- Concurrency problems are becoming harder to debug
- Your architecture cannot support the next stage of the product
- Your team is afraid that every change will break something else
I help engineering teams turn fragile iOS codebases into systems that can evolve with the product.
How I Work
I Don’t Start by Rewriting Your App
I start by understanding why your current architecture is creating friction.
01 — Architecture Analysis
I review project structure, dependencies, state management, navigation, data flow, concurrency, networking, testing, and technical boundaries.
02 — Risk Identification
We identify the technical decisions most likely to affect stability, scalability, development velocity, and future product growth.
03 — Prioritized Recommendations
You receive actionable recommendations—not a 50-page document nobody uses.
04 — Technical Roadmap
We define what should be fixed now, what can wait, and what should not be touched.
05 — Engineering Strategy
I work with your team to turn architectural decisions into an implementation path that makes sense for the business.
The goal isn’t perfect architecture.
It’s an iOS codebase your team can confidently evolve for years.
When You Need Me
Is Your iOS App Starting to Fight Your Team?
You probably don’t need another developer adding more code.
I don’t approach architecture as a diagramming exercise.
You need someone who can identify why the codebase is becoming harder to change—and what to fix before growth makes it worse.
- Your iOS app is already in production
- New features take longer than they should
- Your Swift codebase has become difficult to maintain
- Crashes or performance issues are affecting users
- Concurrency problems are becoming harder to debug
- Your architecture cannot support the next stage of the product
- Your team is afraid that every change will break something else
Before You Rewrite Your iOS App, Let’s Find Out What Actually Needs Fixing.
Consulting Differentiator
You Don’t Need Another Generic Software Consultancy
- Deep experience with Swift, UIKit, SwiftUI, concurrency, testing, architecture, dependency management, and Apple platform development..
- The recommendations are designed for applications that already have users—not theoretical sample projects.
- MVVM, Clean Architecture, coordinators, modularization, dependency injection, TCA, or custom approaches are tools—not religions. The architecture should fit the product.
- The “cleanest” solution is not always the right solution. Architecture should reduce risk while keeping the company capable of shipping.
- Every review should end with clear priorities and decisions your engineering team can execute.
Senior/Staff iOS Experience Applied to Real Production Problems
My focus today is helping companies make better technical decisions around iOS architecture, Swift, scalability, performance, concurrency, CI/CD, and long-term maintainability.
I don’t approach architecture as a diagramming exercise. I approach it as an engineering system that determines:
- How quickly your team can ship.
- How safely your app can change.
- How difficult bugs are to diagnose
- How easily new engineers can contribute.
- How easily new engineers can contribute.
- Software engineering experience.
- Architecture beyond implementation.
- Real applications, real users, real constraints.
- Native Apple platform expertise.
- From code structure to CI/CD and engineering workflows.
Questions About Working With Me (FAQ)
What kind of iOS projects do you work with?
I primarily work with existing iOS applications where architecture, scalability, performance, technical debt, or engineering velocity have become important concerns.
Do you build complete applications?
My highest-value work is architecture, technical assessment, senior engineering guidance, and solving complex iOS problems. Depending on the engagement, I can also contribute directly to implementation.
Do you work with SwiftUI and UIKit?
Yes. Most real-world applications include different generations of Apple technologies. I work with SwiftUI, UIKit, hybrid architectures, and migration strategies between them.
Can you help us migrate to newer versions of Swift?
Yes. This includes language modernization, Swift Concurrency adoption, isolation issues, compatibility risks, and migration strategies designed to avoid disrupting product delivery.
Can you review our architecture without forcing us to rewrite everything?
Yes. In fact, avoiding unnecessary rewrites is usually one of the primary goals.
Do you work with Clean Architecture or MVVM?
Yes, but I don’t force a specific pattern onto every project. Architecture should solve the constraints of the application—not satisfy a diagram.
Can you help with performance problems?
Yes. I can evaluate application launch, main-thread work, concurrency, memory behavior, networking, rendering, and architectural problems that contribute to poor performance.
Can you work directly with our engineering team?
Yes. I can work with engineering leaders and developers to review decisions, establish architecture direction, define migration strategies, and help unblock difficult technical problems.
Do you use AI in software engineering?
Yes. I use modern AI-assisted engineering workflows where they improve productivity, analysis, testing, documentation, or implementation—without replacing engineering judgment.
How do we start?
Start with a short technical conversation. We’ll discuss your application, the problems you’re experiencing, and whether an architecture review or deeper engagement makes sense.
If your team is shipping an iOS application that is becoming harder to maintain, harder to scale, or harder to change safely, I can help you understand what needs to happen next.
Get senior-level iOS guidance before technical debt dictates your roadmap.
30-minute initial conversation · No commitment
Make Sure Your Architecture Can Grow With It.
If your team is shipping an iOS application that is becoming harder to maintain, harder to scale, or harder to change safely, I can help you understand what needs to happen next.
Get senior-level iOS guidance before technical debt dictates your roadmap.
30-minute initial conversation · No commitment
Work Directly With a Senior iOS Engineer
I’m Tony Trejo, a Senior iOS Engineer and software architect with 18+ years in software development.
I’ve spent my career working on real products, technical systems, mobile applications, engineering teams, and the architectural decisions that become increasingly important as software grows.
Today my work focuses heavily on the Apple ecosystem:
Swift. SwiftUI. UIKit. Swift Concurrency. Architecture. Testing. Performance. CI/CD. AI-assisted development.
I also create technical content for engineers who want to understand not only **how to write iOS code**, but how to make better engineering decisions.
If your team needs another pair of hands, there are thousands of developers available.
If you need someone to challenge the architecture, identify risk, and help determine the right technical direction—that’s where I provide the most value.
