SwiftUI + UIKit hybrid apps
SwiftUI-first for new screens, UIKit interop for legacy or platform-specific surfaces. NavigationStack discipline, observation-based state.
Loading…
Senior engineering · iOS / Swift
Senior iOS / Swift engineering for production systems.
Native iOS engineering — Swift, SwiftUI, Combine, Core Data, App Store review hardening, and the privacy-manifest discipline App Tracking Transparency now demands.
- In production
- 2018+
- Senior bench
- 15+ G6/G9 engineers
- Floor
- G6+ on client work
- Engagement
- Outcome-led, not hourly
Why senior, not contractor
iOS / Swift in production is a different problem than iOS / Swift on a laptop.
Building an iOS app is the easy part. Surviving App Store review is the hard part — and so is hitting WidgetKit / Live Activities / App Intents discoverability budgets, defending battery and memory budgets across iPhone 11 → 16 Pro Max, and shipping enterprise builds via MDM that don't break on the next iOS release. Prosigns ships iOS as production engineering: privacy manifests reviewed against runtime behavior, performance budgets defended in CI, and a release pipeline that the App Store accepts on the first attempt.
Senior floor
G6+ minimum
Bench depth
15+ G6/G9 engineers
In production
2018+
Engagement
Outcome-led SOW
Where iOS / Swift ships
6 sub-areas, grounded in shipped engagements.
Specific applications of iOS / Swift we’ve built and operate. Every example below maps to a real engagement, not a bullet on a stack-card.
01 02 Concurrency with async/await
Structured concurrency, actors, MainActor discipline, Sendable conformance, isolation-aware error handling.
03 App Store + privacy review
Privacy manifests, App Tracking Transparency, App Privacy Report alignment, common rejection-category audit pre-submission.
04 Enterprise + MDM distribution
Apple Business Manager, MDM (Intune, JAMF, Workspace ONE), custom apps program, configuration profiles, MAM policies.
05 Health + accessibility
HealthKit integration, accessibility-first UI (Voiceover, Dynamic Type, Reduce Motion), regulated workflows for clinician apps.
06 Watch / TV / CarPlay
watchOS apps with proper complications and Live Activities, tvOS for media-led brands, CarPlay extensions where appropriate.
Stack depth
The iOS / Swift ecosystem, owned.
Frameworks, libraries, and runtime tools the bench has shipped in production. Not a CV-skim — a working depth.
UI frameworks
- SwiftUI
- UIKit
- Combine
- Observation
- Charts
Data + persistence
- SwiftData
- Core Data
- Realm
- GRDB
- CloudKit
System integrations
- HealthKit
- WidgetKit
- App Intents
- PushKit
- StoreKit 2
Networking
- URLSession
- Async URLSession
- Alamofire
- WebSocket
Quality + ops
- XCTest
- Swift Testing
- Xcode Cloud
- Sentry
- Firebase
Engagement models
Three ways to engage iOS / Swift engineers.
We don’t bill hourly contractors. Engagements run against outcomes — choose the shape that matches the work.
See engagement models- 01
Fixed-scope
Defined deliverable, fixed price
When the deliverable is clear and the scope is bounded — an MVP, a migration, a discrete platform build. Senior engineering against a written outcome, not against a body count.
- 02
Embedded squad
Senior product team, ongoing
When the work is product-shaped and the cadence is continuous. A senior pod (engineering + design + PM as needed) embedded into your team, with the practice lead co-piloting from HELM.
- 03
Managed services
Steady-state operations
When the system is running and needs ongoing engineering ownership — operations, SLO defense, release management, security and compliance evidence. Monthly retainer against a published SLA.
Selected work
iOS / Swift engineering that shipped.
Healthcare
SMART-on-FHIR clinician rounding app on iPad for a 14-hospital system.
99.4%crash-free rateSwiftUI-first with UIKit interop for legacy hospital integrations. HealthKit + custom CDA integrations. Survived MDM rollout and the first 60-day audit cycle.
Duration · 9 months
Brief us
Reply < 4 business hoursHave a iOS / Swift workload? Send a brief.
Five fields. Goes straight to the practice lead — not an SDR. We’ll reply with a senior engineer’s read on fit, scope, and the engagement model that suits the work.
FAQ
Questions buyers ask.
Everything below also appears in the proposal and the SOW — no surprises after signing.
SwiftUI or UIKit?
SwiftUI for new builds — the productivity win is real and it's the framework Apple is investing in. UIKit interop where SwiftUI doesn't yet match parity (deep custom transitions, complex collection views, certain accessibility surfaces). We don't ship UIKit-only new builds in 2026.
Will the app survive App Store review?
Yes. Privacy manifests, ATT compliance, and common rejection categories are reviewed pre-submission. Resubmission support is included if the first attempt is rejected — but our first-attempt acceptance rate is in the high 90%s.
Is this staff-aug, or is it engineering-led delivery?
Engineering-led delivery. We don't bill hourly contractors against your JIRA board. Every engagement runs against a defined outcome with a senior engineer accountable from kickoff to operating cutover. If you genuinely need staff-aug — discrete bodies, your management, hourly rates — we'll be honest and route you to a partner that fits.
What seniority floor are we talking about?
G6 minimum (six-plus years in their craft) on every billable hour. Department leads are G9 or G10. We don't flex juniors onto the bench mid-sprint, we don't subcontract to delivery centers, and we don't dilute senior rates with mixed staffing. The bench in the proposal is the bench in production.
How does pricing work?
Three engagement models published at /engagement-models/. Fixed-scope for defined deliverables, embedded squads for ongoing product work, managed services for steady-state operations. Rates depend on seniority, engagement length, and region. Discovery + scoping conversation is free; SOWs are written against deliverables, not bodies.
Where are your engineers based?
Senior-only across Dallas, Doha, Lahore, and Islamabad. We staff against the engagement's needs (timezone, language, regulatory frame), not against arbitrary regional preferences. Most engagements run with a US/EU-aligned core and a follow-the-sun extended bench when the workload warrants it.
Will the engineers I see in the proposal be the engineers shipping the work?
Yes. We name the engineers in the SOW, attach their profiles, and they're on the kickoff. We don't bait-and-switch with senior reviewers and junior execution. If a named engineer needs to roll off the engagement (rare), we surface a replacement from the same seniority tier with explicit handoff.
Talk to a iOS / Swift lead
Senior iOS / Swift engineering, accountable from kickoff.
Bring the workload — we’ll bring a senior engineer plus the practice lead most relevant to the work. 30 minutes, no obligation, no junior reps.