Top iOS Developer Jobs in Denver & Boulder, CO

Lead architecture, build, test, and scale Gusto's iOS app and mobile infrastructure. Improve build pipelines, automated testing, release processes, and foundational services (push, accessibility, localization). Collaborate across product, design, security, and infrastructure teams; prototype, iterate, and launch customer-focused features while mentoring engineers.

Design, develop, test, and maintain enterprise backend services (Java/Spring Boot) and native or cross-platform mobile apps (iOS/Android). Build REST APIs, frontend interfaces, CI/CD pipelines, and ensure security, performance, and production support in an Agile environment.

Lead design, develop, test, and maintain full-stack Java enterprise applications and native mobile apps (iOS/Android). Build Spring Boot microservices, responsive frontends (Angular/React/Vue), integrate APIs, ensure security and performance, participate in CI/CD and DevOps, mentor engineers, and support app releases and production troubleshooting.

Own and ship the mobile app end-to-end: design architecture, implement native iOS/Android features (push, background tasks), integrate anti-smishing and verification-code protections, manage builds/releases and crash reporting, and collaborate with product, design, and security teams.

Senior iOS Developer to design and build secure, high-performance iOS apps using Swift (SwiftUI/UIKit). Implement webview integrations (WKWebView/ASWeb), ASWebAuthenticationSession for OAuth/SSO, JavaScript interop, and native features (camera, push, maps). Ensure responsive web content handling and secure data management. Remote role but must be Bangalore-based with weekly (~1 hour) client office visit to collect a device.

Develop and maintain iOS applications across the full product lifecycle, including coding, testing, debugging, performance optimization, releases, and ongoing support. Collaborate with product and internal teams to plan features, improve user experience, maintain legacy applications, and ensure quality standards. The role requires Swift and Objective-C expertise, App Store publishing experience, and familiarity with APIs, analytics, WebRTC, and WebSocket technologies.

Design, build, and maintain scalable, high-performance iOS applications using Swift. Deliver end-to-end features, integrate with back-end services, implement animations and Auto Layout, ensure test coverage and CI/CD, profile and optimize performance, and mentor team members.

The role involves designing, developing, and maintaining iOS applications, driving technical architecture, and promoting knowledge sharing within the team.

As a Senior iOS Engineer, you will lead engineering decisions, ship production code for the Speechify iOS app, and enhance the app's architecture. You'll work in a collaborative product team, focusing on user experience and product development.

Lead development and improvement of a production iOS app used by tens of thousands. Own architecture, UI, networking, local persistence, and automated tests. Collaborate with Android and backend teams, diagnose async and device-specific issues, use Xcode Instruments, CI, and crash/analytics tooling, and drive product-minded technical decisions.

Build and maintain performant, accessible consumer-facing experiences for Netflix’s iOS app using Swift and GraphQL. Collaborate with product managers, designers, and engineers to scope projects, refine interfaces, develop shared infrastructure, and make architectural trade-offs. Teams may focus on client foundations, server-driven UI, advertising frameworks, or ad insertion. Responsibilities include writing robust maintainable code, automation, documentation, and supporting high-quality, scalable mobile experiences.

The iOS Engineer will handle full lifecycle development, including requirements gathering, designing solutions, coding, testing, implementation, and support.

Develop and maintain iOS applications using Swift and SwiftUI with AI features, optimize performance, and collaborate with backend and ML engineers.

Develop high-quality, performant, accessible consumer-facing experiences for Netflix’s iOS app using Swift and GraphQL. Responsibilities include building maintainable code, automation, documentation, server-driven UI infrastructure, and ad experiences. Collaborate with product managers, designers, and engineering teams to scope projects, refine interfaces, design scalable solutions, and balance business, product, and architectural trade-offs.

Build and own complex iOS account and commerce features from technical design through launch. Develop reliable, performant, accessible experiences using modern declarative UI and unidirectional state architecture. Collaborate with backend, Android, web, product, design, and data science teams to ensure cross-platform consistency. Write tested maintainable code, resolve performance issues, participate in reviews, mentor engineers, and help establish iOS engineering practices for a newly formed team.

Build and maintain iOS applications for Aetna Digital healthcare products. Responsibilities include developing code and tests, monitoring and troubleshooting production applications, refactoring existing code, and improving application stability, performance, maintainability, scalability, and extensibility. The role collaborates with product and design teams to deliver mobile features for millions of members.

The role involves leading key engineering decisions, shipping production code for the Speechify iOS app, and collaborating on product development within a dedicated team.

Lead iOS architecture and deliver native Swift/SwiftUI features for a regulated financial client. Own modularization, state management, CI/CD, testing, secure data handling, API integration, and App Store releases. Mentor a mid-level engineer and enforce compliance and quality standards while leveraging AI-assisted tooling to accelerate delivery.

As an iOS Engineer at Geo, you will develop user interfaces, own the app architecture, and write high-performance code.

Build and maintain high-performance iOS mobile applications using React Native. Collaborate with designers, product, and backend teams to implement features, integrate RESTful APIs, optimize performance, debug issues, write clean code, participate in code reviews, and keep up with mobile development best practices.

Develop and maintain iOS applications using Swift and SwiftUI. Implement reactive code with Combine, follow design patterns, write UI/unit tests, profile and fix performance with Xcode Instruments, manage repos with GitHub, integrate crash reporting and analytics, and distribute frameworks via SPM/CocoaPods.

Design, build, and maintain high-performance native iOS applications. Collaborate with cross-functional teams to define and ship features, ensure app performance and responsiveness, fix bugs, integrate RESTful APIs and third-party libraries, participate in code reviews, and evaluate new technologies to improve development efficiency.

Design, build, and maintain high-quality native iOS applications using Swift and iOS frameworks. Implement UI with UIKit/SwiftUI, handle concurrency, integrate RESTful APIs, ensure unit testing, memory management, and automated code quality in CI/CD pipelines for high-traffic cloud-backed services.

Senior iOS developer to design and build maintainable, performant iOS apps using Swift/SwiftUI and modern concurrency. Build core UI infrastructure, write automated tests (XCTest/XCUITest), participate in code reviews, release apps to the App Store using CI/CD tooling, and partner cross-functionally to define mobile standards.

Senior iOS Developer responsible for building and maintaining native iOS apps using Swift and SwiftUI. Work includes iOS SDK and framework integration, multi-threading, memory management, unit testing, RESTful API integration, cloud/distributed services, CI/CD automation, code quality tooling, and version control collaboration.