IOS DEVELOPMENT SERVICES
Build custom iOS apps with experts trusted by 1500+ companies.
Looking for senior iOS developers with a track record of delivering cutting-edge apps for leading brands? Our engineers have shipped apps supporting millions of users across industries. Onboard senior iOS developers in 2–4 weeks.
AI Coding tools we use
IOS APP DEVELOPMENT SERVICES
No matter what you're building, we can help.
Our iOS app development services support the full product lifecycle: new native builds, codebase modernization, cross-platform delivery, security and compliance, and ongoing upgrades. Whatever your iOS roadmap requires, we have the right engineers to execute it.
Native iOS App Development
Users expect instant responsiveness, offline functionality, and interfaces that follow Apple's design standards. We develop native iOS apps in Swift and SwiftUI with optimized memory management, efficient networking, and platform-specific features as part of our iOS-focused software development services.
Our engineers build for iPhone and iPad as primary targets, with architecture that supports extension to Apple Watch and Apple TV when your product roadmap calls for it. That way, your iOS apps meet Apple's performance bar and deliver the experience your users already expect.
SwiftUI & Modern iOS Architecture
Legacy iOS apps built on UIKit accumulate layout code and state management overhead that slow down every new feature. Migrating to SwiftUI reduces that burden, but a full rewrite risks breaking production functionality. We convert UIKit apps to SwiftUI incrementally, replacing components one at a time while keeping the existing app stable.
Each phase includes parallel testing against the current production build to catch regressions early. This approach gives you a modern, more maintainable codebase with faster iteration cycles and full compatibility with current and future iOS versions.
Cross-Platform iOS & Android Development
Building separate native apps for iOS and Android doubles development effort and creates two independent maintenance streams. Cross-platform frameworks let teams share business logic while preserving platform-specific UI conventions. We build cross-platform apps using React Native or Flutter with native module integration and optimized rendering.
We design and build platform-specific components that handle the UI details users notice, while shared code covers core business logic, networking, and data layers. Cross-platform development reduces your time-to-market and costs while reaching both platforms.
iOS Security & Compliance Implementation
iOS apps handling health records, financial transactions, or enterprise data carry regulatory exposure with every release. A single compliance gap can result in fines or loss of customer trust. We add encrypted storage using Keychain, enforce certificate pinning for API calls, layer biometric authentication, and run security audits against your specific regulatory requirements.
For apps operating in regulated industries, we also apply code obfuscation and jailbreak detection. The resulting iOS apps protect your user data while meeting HIPAA, GDPR, and PCI-DSS requirements.
iOS API & Backend Integration
Most iOS apps depend on backend services for authentication, data sync, payment processing, and third-party integrations. Poorly designed integration patterns create sync failures and maintenance overhead. We architect API layers, wire up secure authentication with OAuth 2.0, and build offline-first sync strategies that handle intermittent connectivity gracefully.
We build integrations with services like Stripe, Firebase, and AWS using documented contracts with proper error handling and retry logic. This keeps your app's data consistent whether users are on Wi-Fi, cellular, or temporarily offline.
Apple Watch & iPad App Development
Extending your product to Apple Watch or iPad requires dedicated design and development effort, not a scaled-down or scaled-up version of your iPhone app. Teams that treat it as a resizing exercise ship apps that frustrate users on both form factors.
We build standalone watch apps, watch complications, and iPad interfaces with split-view, multitasking, and Apple Pencil support. Our work gives you purpose-built experiences for each device, not a phone app stretched to fit a different screen.
iOS App Maintenance & Feature Enhancement
iOS apps that fall behind on annual updates break on new devices, hit deprecated APIs, and accumulate security debt that gets more expensive to resolve with each release cycle.
We provide ongoing maintenance, including annual iOS version updates, dependency upgrades, crash monitoring, and feature development. Our teams review crash reports and App Store feedback to catch issues before they escalate. We make sure your app stays current, stable, and compatible as Apple's platform evolves.
App Store Optimization & Deployment
App Store submission and optimization pull engineering time away from product work. Between provisioning, compliance checks, metadata, and review cycles, the process is a recurring overhead that most teams would rather offload.
We manage provisioning profiles, TestFlight distribution, metadata optimization, screenshot preparation, and pre-submission compliance checks. When Apple responds with feedback, we address it and resubmit the same day. So you can launch on schedule with visibility in the categories that matter to your users.
iOS case studies
Hundreds of iOS development projects delivered.
Our iOS specialists have the experience and expertise needed to build iOS apps that deliver real value. It's why 500+ clients choose us as their iOS development company.
- SECURITY
Refactored iOS Code and Reduced Crash Rate for $1B Security Platform
Avigilon's iOS notification app had a 5% crash rate, undermining reliability for 100,000+ organizations using their AI-powered surveillance. We provided 2 teams (16 specialists including iOS, front-end, back-end, and QA) over a 1-year engagement. The team refactored iOS code, automated testing, redesigned the UI to meet usability guidelines, and improved DevOps deployment processes.
- iOS
- React
- .NET
- Azure
- HEALTHCARE
Developed HIPAA-Compliant iOS Wellness App Powered by AI Health Insights
Our client, a neuroscience-driven wellness company, needed to build a HIPAA-compliant iOS app that extracts data from smartphones and wearables for AI-powered insights. We embedded 8 senior engineers over 1.5 years through staff augmentation. Our team built the iOS app, compiled the Android library, and developed the platform that processes health data into personalized recommendations.
- iOS
- Android
- React Native
- Amazon Web Services
- FINTECH
Built Secure Trading Modules for Abra's 2M-User Cryptocurrency Platform
Abra, the world's first blockchain-based peer-to-peer money transfer network, needed to streamline trading and elevate the user experience across 150 countries. We provided nearshore engineers with iOS, Android, Java, and Kotlin expertise over a 4-year staff augmentation engagement. The team improved test automation and QA coverage, built a US domestic wires and ACH module for liquidity, and developed an ETFs and stock trading module.
- iOS
- Android
- Java
- React
- Kotlin
Automotive
We migrated a $650M automotive platform's iOS app to SwiftUI while shipping new features in parallel.
- 1.5-Year Engagement
- 10 Senior Engineers
- 2 Dedicated Teams
Our client operates a vehicle research, comparison, and purchasing platform generating $650 million in annual revenue. They needed to migrate their iOS app from UIKit to SwiftUI for long-term reliability while simultaneously fixing bugs and adding features across iOS and Android.
Completed full migration to SwiftUI, delivering a more stable and maintainable iOS app
Built a vehicle history filter and historical price graph for enhanced buyer research
Fixed critical bugs across iOS and Android platforms
Get expert help for your iOS project.
“Their engineers perform at very high standards. We've had a strong relationship for almost 7 years.”
Our top 1% tech talent.
Work with vetted senior software engineers.
With a decade of experience and dozens of complex builds under their belts, our software engineers raise the bar on every project they work on.
Federico S.
Buenos Aires, AR
Engineering Manager
Manuel C.
Buga, CO
Sr. Software Engineer
Lucas G.
Rio de Janeiro, BR
Sr. Full-Stack Engineer
Bruno S.
São Paulo, BR
Sr. Back-End Engineer
Ricardo A.
Buenos Aires, AR
Sr. QA Engineer
André P.
São Paulo, BR
Sr. Front-End Engineer
Gustavo A.
Marília, BR
Sr. DevOps Engineer
Javier V.
Quito, EC
Sr. Software Architect
Yuri B.
Blumenau, BR
Tech Lead
Diego N.
João Pessoa, BR
Sr. Mobile Engineer
Matheus C.
Rio de Janeiro, BR
Sr. Software Engineer
Onboard an iOS development team in weeks, not months.
About BairesDev
Why work with BairesDev? We’re trusted by the world’s top tech teams.
BairesDev is a US-based company powered by LATAM dev teams. Since 2009, we’ve built software for companies of all sizes—from scrappy startups to Fortune 500 giants. In fact, we’re one of the fastest-growing software development companies in the world. If you’re looking for onshore quality with nearshore benefits, we’re the partner for you.
1480+
Projects
Delivered
4000+
Developers
On Staff
96%
Client Retention
Rate
500+
Active
Clients
How we work
Here's what makes us easy to work with and hard to replace:
From code quality to compliance, we’ve optimized every part of how we work to support high-performing engineering teams. For you, that means clearer communication and smoother delivery. Plus, get peace of mind from having a development partner you can depend on.
Work with our iOS development experts.
- Vetted Senior TalentWe hire the top 1% of over two million applicants, so you only work with the best.We give you engineers who’ve already proven they can deliver. Our rigorous evaluation process includes technical tests, English assessments, soft skill screening, problem-solving simulations, and more. Out of over 2 million applicants who apply yearly, fewer than 1% get the chance to join our team. This is how we ensure you get highly qualified developers who are experts in their fields.
- Timezone AlignedWe work your team’s hours, which creates faster feedback loops and fewer blockers.Our nearshore software engineers share your workday, answering Slack messages, joining daily stand-ups, and presenting demos in real time. Project management is streamlined, questions are answered quickly, blockers are resolved as they come up, and simple code reviews take minutes, not days.
- Proficient in EnglishOur engineers have strong English skills, so communication and documentation are clear.Our engineers have 8+ years of experience collaborating with US teams. They excel at articulating complex technical concepts to diverse stakeholders, producing meticulous documentation, and driving technical discussions. This eliminates the ambiguity common with global teams.
- Full-stack CapabilitiesWith expertise in 100+ technologies, we have every specialist your project requires.We cover architecture, development, testing, DevOps, and everything in between—reducing hand-offs and creating better architecture decisions for a smoother path from concept to production.
- Scalable TeamsOur bench strength lets you scale engineering teams to meet new demands in weeks.With 4,000+ engineers on staff and thousands more in our pipeline, we can spin up pods or scale multiple teams across your company in days—so you hit aggressive timelines without bottlenecks.
- Standard MSAs & SOWSWe’re easy to onboard because we work the way your legal team expects us to.Because we’re based in the US, we follow the same legal standards your team already trusts—using MSAs, SOWs, and documentation that fit your procurement process.
- NDAs & IP ProtectionWe take data and IP seriously, with full protection baked into every engagement.Every engagement begins with a mutual NDA and clear IP ownership terms. Our secure workflows and confidentiality protocols also protect existing codebases and proprietary data.
- Enterprise-grade SecurityOur devs follow security protocols that meet even the strictest enterprise standards.Our engineers work only within the systems they need, using strict access control, audit-friendly workflows, secure repository storage, and more—bringing enterprise-grade protection to every engagement.
- Managed DeliveryWe actively track our devs’ work to make sure they consistently meet expectations.Delivery managers monitor progress, resolve blockers, and report regularly, so you never have to chase updates or second-guess performance.
Work with our iOS development experts.
Flexible engagement models
Need iOS development expertise?
Plug us in where you need us most.
We customize every engagement to fit your workflow, priorities, and delivery needs.
- Need a couple of extra software engineers on your team?
Staff Augmentation
Get senior, production-ready developers who integrate directly into your internal team. They work your hours, join your standups, and follow your workflows—just like any full-time engineer.
- Need a few teams to deliver several projects simultaneously?
Dedicated teams
Spin up focused, delivery-ready pods to handle full builds or workstreams. Together we align on priorities. Then our tech PMs lead the team and drive delivery to maintain velocity and consistency.
- Want to offload everything to us, from start to finish?
Software outsourcing
Hand off the full project lifecycle, from planning to deployment. You define the outcomes. We take full ownership of the execution and keep you looped in every step of the way.
Kick off ecommerce development projects in 2-4 weeks.
We have reps across the US.
Speak with a client engagement specialist near you.
- Discuss solutions and decide team structure.
Tell us more about your needs. We'll discuss the best-fit solutions and team structure based on your success metrics, timeline, budget, and required skill sets.
- Onboard your team and get to work.
With project specifications finalized, we select your team. We're able to onboard developers and assemble dedicated teams in 2-4 weeks after signature.
- We track performance on an ongoing basis.
We continually monitor our teams' work to make sure they're meeting your quantity and quality of work standards at all times.
CUSTOM IOS APP DEVELOPMENT
Build with iOS developers who have experience in your industry.
We've delivered projects across 130+ industry sectors. You won't have to spend weeks getting us up to speed. Our engineers come in with a clear understanding of your industry's user expectations, compliance requirements, and unique needs.
AI Experts
Work with AI-augmented developers.
Every developer we provide uses modern AI coding tools to ship faster than ever while producing cleaner, more consistent code.
IOS DEVELOPMENT CAPABILITIES
We cover the iOS stack (and everything around it).
As a top iOS app development company, we use a modern tech stack built for performance and scale, with a focus on proven tools. Our expertise spans 100+ technologies, so we're equipped to support your full roadmap: iOS and beyond.
UI Frameworks
We build interfaces in both SwiftUI and UIKit, including hybrid apps that use both. Our teams handle incremental SwiftUI adoption in mature UIKit codebases and build new apps in SwiftUI from the ground up.SwiftUIUIKitSnapKitData Persistence & State Management
We design local storage architectures for offline-first apps, encrypted data at rest, and complex sync strategies. Our engineers model data schemas, manage reactive state with Combine, and handle migration paths as data models evolve.Core DataRealmSQLiteKeychainCombineNetworking
We build API integration layers that handle authentication, retry logic, certificate pinning, and offline queuing. Our engineers work with whatever backend architecture your team runs, adapting to your contracts and error handling patterns.URLSessionAlamofireMoyaTesting Frameworks
We write unit tests for business logic, UI tests for critical user flows, and snapshot tests to catch visual regressions between releases. Our test suites run in CI and gate every merge to protect production stability.XCTestXCUITestQuickNimbleswift-snapshot-testingAppiumPayment & Commerce
We handle StoreKit integration for subscriptions and one-time purchases, including receipt validation, entitlement management, and App Store compliance. Our engineers also integrate third-party payment processors where in-app purchase rules allow.StoreKitApple PayStripeRevenueCatAnalytics & Monitoring
We instrument apps with crash reporting, performance monitoring, and user analytics so issues surface before they hit App Store reviews. Our engineers configure dashboards and alerting that give your team real-time visibility into app health.Firebase AnalyticsCrashlyticsMixpanelAmplitudeApp Store Connect AnalyticsNew RelicCI/CD & DevOps
We build automated pipelines that handle code signing, provisioning, testing, and deployment to TestFlight and the App Store. Package management, dependency resolution, and versioning are part of every build chain we set up.FastlaneXcode CloudGitHub ActionsBitriseTestFlightSwift Package ManagerCocoaPodsDevice-Specific Frameworks
We integrate Apple platform frameworks for on-device ML inference, augmented reality, health data, location services, and biometric authentication. Our engineers work with these APIs at a level beyond sample code, handling edge cases and device-specific behavior.CoreMLARKitCoreLocationHealthKitHomeKitLocalAuthenticationUserNotificationsSiriKit
IOS DEVELOPMENT PROCESS
How we deliver iOS solutions that drive business value:
We've refined our iOS development services across hundreds of projects. Whether you need end-to-end execution or support for an internal team, we step in wherever you need us to move projects forward without friction.
Discovery & Requirements Analysis
We work with stakeholders to define user needs, business objectives, target devices, and compliance requirements, then translate those into technical specs that guide architecture and prioritization.
iOS Architecture Design
Our architects define design patterns, plan data flow, set module boundaries, and establish networking strategies. These decisions shape how the codebase scales and how easily new engineers onboard.
UI/UX Design & Prototyping
We design interfaces aligned with Apple's Human Interface Guidelines, build interactive prototypes, and validate with usability testing. Early validation cuts rework during development.
Development Environment Setup
We configure Xcode projects, establish code structure, set up dependency management and version control. Standardized environments keep collaboration consistent as the team scales.
Core Feature Development
Engineers build core functionality in Swift and SwiftUI, wire up business logic, create reusable components, and integrate device features. Code reviews gate every merge to protect quality.
API Integration & Backend Connection
We connect to backend services with secure authentication, offline-first sync, and third-party integrations. Error handling and retry logic keep data consistent across variable network conditions.
Data Persistence & State Management
We set up local storage with Core Data or Realm, configure caching strategies, and manage reactive state with Combine. Offline functionality and fast UI updates depend on getting this right.
Testing & Quality Assurance
We write unit tests for business logic, UI tests for critical flows, and device-specific tests across iPhone and iPad models. Accessibility testing runs in parallel. All tests gate CI merges.
Performance Optimization
We profile with Instruments, optimize memory usage, reduce app binary size, and tune launch times and scrolling frame rates. Performance budgets are set early and tracked through release.
Security Implementation
We add Keychain-based encrypted storage, biometric authentication via LocalAuthentication, certificate pinning, and security audits scoped to your regulatory requirements.
App Store Submission & Review
We prepare metadata, screenshots, and provisioning profiles, run TestFlight beta distribution, and manage the review cycle. When Apple flags issues, we resolve and resubmit the same day.
Post-Launch Support & Iteration
We monitor crash reports, review App Store feedback, ship bug fixes, update for new iOS versions, and develop new features. So your app stays stable and current as the platform evolves.
Client testimonials
Get dev outcomes you can stand behind.
Our work holds up in reviews, in production, and in front of the board.
Global companies have trusted us to build and scale custom iOS solutions for over a decade.
Excellence.
Our minimum bar for client delivery.
Over 130 awards, accolades, and achievements showcase our quality and commitment to client success.
- 1,250+projects
delivered - 130+industry
sectors
America's Fastest-Growing Companies 2025 by Financial Times Top 100 U.S. IT Innovators 2025 by CIO100 Awards Nearshore North America Top Software Developers 2025 by Clutch Top 100 Global Outsourcing Providers 2024 by IAOP Global Outsourcing 100
What tech leaders ask about our iOS development services:
How quickly can you staff an iOS development team?
We typically staff iOS teams within 2-4 weeks. Our 4,000+ engineer bench means we're not recruiting from scratch. All BairesDev engineers are vetted and organized by specialization, allowing us to quickly match your requirements.
What level of experience do your iOS developers bring?
Every iOS app developer on our bench has 8-10+ years of production experience. They've shipped complex custom apps, migrated legacy Objective-C codebases to Swift, and built features like payment processing and AR experiences. They understand memory management, concurrency, and Apple's review guidelines without needing ramp-up time.
Will your team integrate with our existing tools and workflows?
Our nearshore iOS teams work US business hours and participate in your standups, sprint planning, and code reviews. We adopt your tooling, whether that's GitHub, Bitbucket, Jira, or Linear, and follow your branching strategies and deployment procedures. Communication happens in English, in your Slack channels, on your schedule.
Do you have experience delivering iOS apps in regulated industries?
We're ISO 27001 certified and have delivered custom iOS app development projects for regulated industries. We're ISO 27001 certified and have met HIPAA, GDPR, and PCI-DSS standards without slowing delivery timelines. Check out our case studies for relevant examples of such work.
How do you maintain team stability over long engagements?
Most of our engineers stay on iOS projects for 2+ years. Our 96% client retention rate reflects organizations continuing to work with us year after year, not cycling through vendors. When team changes are needed, our bench depth (4000+) lets us backfill roles quickly while maintaining momentum through documentation and structured handoffs.
Do you handle contracts and billing in the US?
Yes, we operate from our San Francisco headquarters under US law and jurisdiction. All contracts, billing, and procurement flow through domestic channels. This keeps vendor management simple for your team and avoids the hassle of international payments.
Should we build a native iOS app or go cross-platform?
That depends on your performance requirements, target audience, and long-term maintenance budget. Native Swift gives you full access to Apple device capabilities and the best performance ceiling. React Native or Flutter reduce development cost when you need iOS and Android parity. We can evaluate the trade-offs with you and recommend based on your specific roadmap.
Can you work with our existing iOS app?
We regularly join projects with established codebases. Our engineers audit the current architecture, identify technical debt and performance bottlenecks, and propose incremental improvements that don't disrupt active development. Whether you need feature additions, a SwiftUI migration, or a full architectural refactor, we adapt to your app's current state.
What does your iOS app development process look like for enterprise projects?
For end-to-end outsourcing engagements, we follow a structured development process: discovery and requirements, architecture design, iterative development in sprints, automated testing gated in CI, and help prepare App Store submissions. Each phase includes defined deliverables and stakeholder checkpoints. For staff augmentation or dedicated teams, our engineers plug directly into your existing processes.
What happens after the iOS app launches?
We provide ongoing maintenance, including annual iOS version compatibility updates, dependency upgrades, crash monitoring, and feature development. Our teams review App Store feedback and crash reports to catch issues early. If your mobile app development needs scale post-launch, we add engineers from our bench without disrupting the existing team.
Useful iOS resources
See why the biggest names in tech choose our iOS development services.
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