SwiftUI & TCA Migration Consulting
UIKit-to-SwiftUI migrations, The Composable Architecture adoption, legacy codebase modernisation. I led the SwiftUI/TCA rewrite that took a medical app to 99.9% crash-free and a CES Innovation Award.
- full UIKit-to-SwiftUI rewrites for production apps
- TCA adoption with the judgment calls about reducer granularity and effects
- rescuing migrations that stalled at 40% and got worse than before
Related work
The Whole App is a Blob
I tried to prepare for life in French-speaking Canada by turning language drills into a Tamagotchi. It worked, as long as you don't ask me whether my coffee is for here or to go.
Read the article →You can't cURL a Border
Country borders don't return JSON, they return judgment. So I built a state machine for travel when governments won't expose your state.
Read the article →
Epsy
Health companion app for epilepsy patients.
See the project →
Lexie
Learn French with your adorable pet blob companion
See the project →
Fermento
Master the art of fermentation with confidence and precision
See the project →
Silk
The health metric your phone doesn't track
See the project →
Residency
Navigate global tax, visa, and citizenship requirements with confidence
See the project →
Theseus
iOS 26 Liquid Glass effects backported to iOS 13+. Metal-optimized glass morphism with blur, refraction, and spring animations.
See the project →
Docket
Think Trello or Jira, but for indie devs who ship their products solo. Comes with App Store Connect sync, MCP & CLI servers, and runs natively on macOS, iOS, and iPadOS.
See the project →
Glint
Master Morse Code with your flashlight and sound
See the project →What clients say
"Vadim was instrumental to the success Epsy enjoyed on iOS, taking it from an idea on a Miro board to the highest rated and most downloaded app of its kind on the store."
James C. · Mobile Engineering Lead, Epsy
"We had a strict deadline, and Vadim managed to complete the job in time. He gave us meaningful feedback and suggested better approaches, not trying to blindly stick to our specification."
Founder · Pre-seed streaming service
"I can say with confidence that it will be difficult to find a better developer. Vadim is achievement-oriented, highly organized, with very good communication skills."
Alex Z. · Co-Founder, eda.so
Common engagements
Architecture review before the migration
Two days reading the codebase. I map the current state, surface the risks you or the team haven't noticed, and recommend the cheapest path to a shipped migration. You get a one-page plan short enough to take to the board and honest enough to show a co-founder.
Lead the migration
6–16 weeks. I architect, pair with the team, migrate the highest-risk modules myself, and leave patterns the team can replicate.
Rescue a stalled migration
Team started gradual, got to 40%, now the app is worse than before. Two paths out. I tell you which one fits after reading the codebase.
Areas I cover
Pricing
Architecture reviews, hiring help, second opinions on that thing that's been bugging you.
Available nowFeatures, MVPs, migrations, firefighting. Minimum 5 days.
Available nowPriority support: review agency code, join architecture calls, catch problems before they ship.
Questions
Can you migrate us to SwiftUI without TCA?
Yes. About a third of my SwiftUI work is vanilla SwiftUI plus @Observable. TCA fits apps with substantial business logic and multi-person teams. For smaller or UI-focused apps, vanilla is cleaner and often faster.
How do you handle UIKit interop during a migration?
UIHostingController at the seams, UIViewRepresentable for UIKit views SwiftUI can't yet do cleanly, and a clear rule about who owns state at each boundary. I document this early so the team doesn't invent conflicting patterns.
We use MVVM / VIPER / Redux-style. Does TCA help?
Sometimes. TCA has specific strengths around testability, effect handling, and navigation modelling. If those are your current bottlenecks, the adoption cost is usually worth it. If your architecture problems are team-process problems, a new framework won't fix them. I'll tell you which one you have.
How do I get a quote?
Two paths. If you need speed, send me a detailed brief and I'll quote from it (usually within 48 hours). If you'd rather talk first, book a free 30-minute scoping call and I'll quote after. Most clients who pick the brief path land on the call anyway once we get into the specifics, but the door is open either way.
How quickly can you start?
Advisory calls can happen within days. For project work, I typically need 1-2 weeks notice to clear the calendar, though I keep some buffer for urgent firefighting. Check the availability badges above for current openings.
Do you work with early-stage startups?
Yes, from pre-seed to Series C and beyond. For very early teams, the advisory tier often makes more sense than project work: you get architecture guidance without committing to a large engagement before you've validated the product.
What's included in the day rate?
Everything: code, architecture decisions, code review, documentation, async Slack availability during working hours. No surprise add-ons. I bill for time spent working on your project, not for "thinking about it in the shower."
How do you handle timezone differences?
Currently in Vancouver (PST) with full overlap for North American teams. For UK and Europe, I'm online by their afternoon. For Gulf or APAC, we'd agree on overlap hours and handle the rest async. I've worked with teams from San Francisco to Dubai.
Where I've worked CV · LinkedIn
Planning a SwiftUI migration?
Describe what you're working on, or book a free 30-min scoping call. I reply within 48 hours.
work@drobinin.com Book a free call →