iOS Engineer

About SesameAt Sesame, we envision a future where technology emulates lifelike interaction—machines that can see, hear, and engage with us in ways that feel natural and human. We are innovating a new category of consumer products that integrate voice agents seamlessly into everyday life. Our dynamic team comprises founders from Oculus and Ubiquity6, along with seasoned veterans from Meta, Google, and Apple, all possessing extensive expertise in both hardware and software. Join us in crafting a transformative future where computers truly come alive.Key Responsibilities:Develop Sesame’s proprietary companion app—an essential building block for a groundbreaking consumer product category—while upholding a commitment to excellence and craftsmanship.Collaborate with cross-functional teams in engineering, design, and product management to deliver complex projects that provide exceptional experiences for users.Contribute to the growth of the iOS team at Sesame by championing best practices and cutting-edge iOS app design techniques.Partner with engineers across iOS, Android, and web platforms to strategize the future of mobile and web solutions for Sesame.Essential Qualifications:Deeply intuitive understanding of iOS app aesthetics and design principles.Demonstrated experience in creating delightful, design-centric applications throughout your career.Proven track record as a technical leader, having taken ownership of launching apps or significant features into production multiple times.A strong passion for delivering outstanding products, driven by a desire to understand user needs and find innovative ways to exceed their expectations.Enthusiastic about the intricate engineering processes involved in crafting fast, user-friendly, and revolutionary iOS interfaces.Expertise in minimizing latency in complex iOS applications; adept at overcoming challenges related to networking, architecture, and SDK limitations to enhance interaction speed.Current knowledge of iOS UI/UX design trends; actively engaged in the Apple release cycle and constantly considering how new features can elevate user experience.Extensive hands-on experience with the iOS app development lifecycle, including build processes, testing strategies, and contemporary UI architecture patterns.Preferred Qualifications:Experience with SwiftUI or Combine frameworks.Familiarity with Agile methodologies and project management tools.

About Wispr FlowAt Wispr Flow, we are revolutionizing the way people interact with their devices, making it as natural as conversing with a close friend.Our cutting-edge voice dictation platform is currently the go-to solution for users, surpassing traditional keyboards. With unparalleled accuracy, context-awareness, and personalization, our technology is designed to function seamlessly on both desktop and mobile devices.By 2026, we aim to expand beyond dictation, developing a robust framework for native actions that intuitively understands user commands and operates dependably.Our diverse team of AI researchers, designers, growth strategists, and engineers is committed to reimagining human-computer interaction. We prioritize collaboration, user-centric innovation, and meticulous attention to detail. A culture of spirited discussion and a focus on impactful outcomes are central to our values.Over the last year, our revenue has surged by 150% each quarter, and we have successfully raised $81 million from leading venture capital firms and prominent angel investors.

Join Our Innovative Team at Air AppsAt Air Apps, we're driven by a vision to think expansively and act swiftly. Founded by a family in 2018 in Lisbon, Portugal, we are on a mission to revolutionize personal and entrepreneurial planning with our cutting-edge AI-powered Personal & Entrepreneurial Resource Planner (PRP). With an impressive milestone of over 100 million downloads globally, our offices in both Lisbon and San Francisco are bustling with creativity and ambition.Our commitment to innovation propels us to challenge conventional boundaries daily, using AI-driven solutions to make a significant impact on how individuals plan, work, and live. Here, you will harness your creativity to develop products that empower people worldwide.Embark on this journey with us to redefine resource management and improve lives along the way.The OpportunityAs a Senior iOS Engineer, you will be pivotal in creating and enhancing our suite of iOS applications, focusing on performance, scalability, and delivering a flawless user experience. You will collaborate closely with designers, product managers, and fellow developers to implement new features and continuously refine our applications. Your strong expertise in Swift and iOS development principles will be essential in fostering innovation and securing our status as a leader in the App Store.This posting aims to expand our talent pool as we prepare for the official job launch. We will reach out to you once the position is live.

About UsAt XOXO, we are a pioneering research lab dedicated to creating the intelligence interface for daily living. Our covert team of expert engineers, designers, and researchers is focused on uncovering innovative solutions to unique challenges that affect life beyond the workplace.With our recent advancements in infrastructure, architecture, and model layers, we are seeking passionate builders to craft the interface and application layers that will actualize our ambitious vision.About the RoleWe are in search of a skilled iOS engineer to develop XOXO's consumer application, featuring a revolutionary interface for intelligence. This role is ideal for an exceptional engineer who can take ownership of the entire mobile experience—from architecture to performance, refinement, and a visually engaging design system that ensures intentionality in every interaction.Your background is less important than your motivation: you possess a strong sense of ownership, operate swiftly without compromising quality, and are eager to create a mobile product that redefines craftsmanship and performance standards.What You’ll DoDesign and launch the initial iterations of our React Native application, transitioning it from prototype to production.Convert a highly visual design system into reusable components, animations, and interaction patterns with smooth performance.Develop new product features that seamlessly integrate modern AI/ML capabilities within the mobile context.Enhance app performance metrics, focusing on rendering, startup time, memory usage, battery consumption, networking, and user-perceived speed.Establish high standards for mobile engineering quality (testing, instrumentation, release discipline) and collaborate closely across the tech stack to deliver comprehensive solutions.Skills & QualificationsMinimum qualifications:A minimum of 3 years of experience in shipping production mobile applications with an unwavering commitment to quality.Extensive knowledge of React Native and Swift, accompanied by a strong understanding of architecture and long-term maintainability.Proven ability to transform a highly visual design system into a fast, pixel-perfect user interface (UI), incorporating components, interaction patterns, and accessibility features.A track record of developing mobile applications that feel instantaneous under real-world constraints (startup time, rendering, memory, battery, networking) and knowing diagnostic techniques for performance issues.

About FayAt Fay, we are dedicated to establishing nutrition as a critical component of preventative healthcare, enhancing outcomes, accessibility, and affordability on a large scale. We are creating AI-driven infrastructure aimed at revolutionizing preventative healthcare. Think that's ambitious? We're only getting started!Fay operates as a three-sided marketplace bridging providers, patients, and payers to transform the delivery of preventative care. Our innovative b2b2c solution empowers dietitians to provide top-notch, affordable nutritional care, enables patients to take charge of their health, and allows payers to cultivate healthier member populations. Nutrition is just our starting point; our platform will evolve into broader areas of preventative health and wellness as we expand.We take pride in being one of the fastest-growing companies in health tech, supported by leading investors such as General Catalyst, Forerunner, 1984, and Goldman Sachs.Are you ready to harness AI-driven technology to transform preventative care and impact health positively? Let’s connect!About this RoleWe are excited to offer a fantastic opportunity for an iOS engineer to join our team. What makes this position a dream job?A rapidly expanding user base of tens of thousands!An opportunity to craft an exceptional mobile-first experience that is central to our company’s vision.A collective mission to deliver high-quality, convenient, and affordable healthcare.Currently, we have an app available on the App Store that marks just the beginning of our vision for a comprehensive mobile experience: a hub for healthy eating where users can chat with licensed dietitians and order groceries covered by insurance. To realize this vision, we need to expand our iOS team!We are seeking a talented and passionate iOS engineer with experience in developing sophisticated iOS applications using native Swift, who thrives in the dynamic atmosphere of a startup.What technologies will you engage with? Our iOS application utilizes native Swift, Combine, and an MVVM architecture. Fay’s core technology stack includes a Python backend, a React frontend, and a Postgres database.Your Responsibilities:Building: You will rapidly implement new features and functionalities into the app.Collaborating: You will partner with our exceptionally skilled designers...

Join Our Dynamic TeamAt OpenAI, the ChatGPT division is at the forefront of redefining how individuals interact with advanced AI technologies. Our team is expanding across various domains, including Growth, Ecosystems, Personalization, and Search Infrastructure, all dedicated to crafting the next era of AI-enhanced products and platforms.Role OverviewWe are looking for a talented iOS Software Engineer to develop and enhance the ChatGPT iOS application. In this pivotal role, you will:Design and implement innovative iOS features that push the limits of AI-powered mobile applications.Enhance app performance, architecture, testing coverage, development tools, and overall reliability.Work collaboratively with Product, Design, Research, and Engineering teams to elevate user satisfaction.Take ownership of components from conception to deployment — including design, implementation, testing, and iterative improvements.Integrate seamlessly with backend and AI systems to create exceptional mobile experiences.Your ProfileExtensive experience in iOS development (Swift/Objective-C), with proficiency in frameworks like UIKit/SwiftUI, Core Data, and performance optimization.A passion for crafting intuitive, high-performance, and engaging mobile experiences.Enjoy working in cross-functional teams and thrive in a fast-paced, iterative environment.We welcome applicants in San Francisco, New York, and Seattle.About OpenAIOpenAI is a pioneering AI research and deployment organization committed to ensuring that general-purpose artificial intelligence serves the interests of humanity. We strive to develop AI systems that are safe, effective, and beneficial, while embracing diverse perspectives from across the globe. Our mission is to harness the transformative power of AI while prioritizing safety and human-centric values.As an equal opportunity employer, we celebrate diversity and are committed to creating an inclusive environment for all employees.

Join our innovative team as an iOS Developer at Lever, where we are redefining the future of talent acquisition. Lever is a leader in hiring software, trusted by top companies like Netflix, Yelp, and Shopify to scale their teams effectively. We take immense pride in our culture and are recognized as the #1 place to work in San Francisco.As a key member of our engineering team, you'll leverage your technical skills to develop cutting-edge iOS applications that enhance user experience and streamline hiring processes. We value independence, curiosity, and resourcefulness, and we’re looking for someone with a keen eye for detail to help us lead and innovate.

About Our TeamJoin OpenAI’s Applications Engineering team, where we are dedicated to transforming our state-of-the-art research into user-friendly products that reach millions of developers and users across the globe. The Applied Foundations team is at the helm of developing the essential product and platform layers that facilitate seamless experiences across our applications, covering everything from identity and access management to safety protocols, payments, and commerce. Our diverse teams encompass product engineering, infrastructure, and safety, collaborating to deliver technology that is secure, reliable, and trusted on a global scale.About the OpportunityAs a Senior iOS Engineer on the Applied Foundations team, you will be instrumental in crafting core mobile experiences that empower users to sign up, manage their accounts, access family features, make payments, ensure safety, and confidently engage with OpenAI’s products. This role focuses on developing high-quality mobile applications as well as reusable iOS components that various product teams rely on to expedite their projects while adhering to the highest standards of security, reliability, and user trust. You will manage intricate client-side systems, including UI, networking, local state, payment integrations, and Apple platform integrations while collaborating closely with backend, product, and safety teams to design the architecture that supports OpenAI’s mobile ecosystem at a global level.Your Responsibilities Will Include:Develop and deploy innovative iOS experiences that leverage the potential of AI.Enhance app performance, reliability, and responsiveness on a global scale.Create and uphold shared iOS frameworks and components for account management, trust, and commerce processes utilized across OpenAI’s mobile applications.Establish comprehensive testing frameworks and optimize app architecture for future maintainability.Collaborate with product, design, research, and backend teams to deliver impactful features.Provide technical direction to influence the evolution of OpenAI’s iOS platform.You Will Excel in This Role If You:Possess 4+ years of experience in professional software engineering.Have a strong history of developing high-quality iOS applications in production, particularly for systems that demand reliability and resilience.Have experience managing complex, mission-critical mobile systems throughout their lifecycle.Have a solid understanding of making architectural decisions within iOS development.Are eager to innovate and tackle challenges in a rapidly evolving technological landscape.

About Cantina:Cantina Labs is a pioneering social AI company, dedicated to developing a cutting-edge suite of real-time models that redefine expression, personality, and realism. Our mission is to animate characters in a way that transforms storytelling, connection, and creativity. With Cantina, our flagship social AI platform, we are just beginning to unlock the potential of AI in shaping human interaction.If you are passionate about the role of AI in enhancing creativity and social experiences, we invite you to join us in crafting the future!About the Role:As a Senior iOS Engineer at Cantina, you will spearhead the development of groundbreaking, high-performance features. This includes designing personalized feeds, creating immersive custom UIs, and empowering our bots with advanced AI-driven functionalities such as chat, text-to-speech, voice selection, image generation, and real-time media effects.You will work closely with Product Managers, Designers, and other key stakeholders to shape the direction of a product that is central to our mission. You will have the opportunity to iterate quickly on impactful updates and enjoy the freedom to bring your innovative ideas to fruition.We seek an individual who excels in pushing the boundaries of iOS development and possesses a fervent desire to create visually stunning, high-performance experiences. Your knowledge of custom graphics, animation frameworks, and media pipelines will be pivotal in establishing the creative foundation of our flagship application, ultimately advancing user experience and innovation within the social AI landscape.What You’ll Do:Utilize frameworks and technologies such as UIKit, AVFoundation, Combine, Core Animation, and others.Lead the development of new AI and media-centric features.Construct and optimize video/audio pipelines, real-time media effects, and AI-enhanced visual features.Participate in Architecture meetings to ensure our applications meet the highest quality standards.Collaborate with Product, Design, and QA teams to deliver polished, scalable user experiences.Own features and contribute as part of a small team that delivers applications to a vast user base.Join a supportive team that values constructive feedback focused on growth.What You’ll Bring:8+ years of experience developing iOS applications.Expertise in custom graphics, animation frameworks, and media pipelines.Strong problem-solving skills and a passion for innovation.

Location: ChinaVisa Support: Not available About Airbnb Since 2007, Airbnb has connected travelers with unique stays and experiences around the world. With more than 5 million hosts and 2 billion guest arrivals, the platform helps people explore new places and cultures while building genuine community connections. Role Overview: Senior iOS Engineer, Global Markets The Global Markets engineering team focuses on improving the Airbnb experience for guests and hosts in over 220 countries. The team adapts and innovates features to meet the needs of diverse markets. While the team works remotely, regular in-person collaboration brings everyone together to share progress and celebrate milestones. What You Will Do Work with product managers, designers, data scientists, QA, and engineers in China and worldwide to turn product requirements into technical solutions. Design and review solutions for a range of challenges, including market-specific features and mobile infrastructure. Write clean, testable, and maintainable code in Swift to deliver smooth user experiences. Mentor junior engineers and help strengthen the team’s engineering practices. Your Impact As a Senior iOS Engineer, you will tackle technical challenges unique to global markets. Projects may include building locale-aware user interfaces, adding features tailored to specific regions, and optimizing app performance. Responsibilities cover key product areas such as sign-up and login, search, checkout, maps, and networking. Your experience will help raise engineering standards through code reviews and mentorship.

About Our TeamAt OpenAI, we are developing a robust Swift platform, from architecture to continuous integration, that empowers hundreds of engineers and their agents to innovate within ChatGPT, Atlas, Sora, and various other rapidly advancing applications. Our mission is to enable teams to expedite development while enhancing both performance and reliability.Role OverviewWe are seeking experienced Staff+ iOS engineers with diverse backgrounds in the iOS platform. We value expertise in performance optimization, build/CI systems, or enhancing AI developer productivity. Whether your specialty lies in UI frameworks or automated testing, your contributions will lead to reduced friction, minimized complexity, fewer regressions, and improved overall performance.If you are passionate about scaling Swift development alongside advanced AI tools, we invite you to apply for this exciting role.This position is open in San Francisco, New York, and Seattle.Key ResponsibilitiesDevelop and enhance foundational Swift frameworks utilized across multiple applications and platforms (caching, state management, observability, navigation, and component systems).Boost application performance (startup speed, responsiveness, memory efficiency, battery life) through profiling, increased visibility, regression prevention, and architectural patterns.Enhance reliability by systematically reducing crashes, improving error handling, and driving improvements in the release process.Collaborate closely with product engineering teams to identify pain points and emerging infrastructure requirements.Create internal tools and automation (Bazel, CI, testing frameworks, Codex agent skills) to accelerate engineering velocity.Simplify complex real-world constraints into clean abstractions through intuitive APIs, enforceable contracts, and safe defaults.Ideal Candidate ProfileStrong fundamentals in iOS engineering (Swift, concurrency, networking, Xcode ecosystem, familiarity with UIKit/SwiftUI) and an understanding of contemporary features and best practices.A penchant for tackling platform challenges: frameworks, architecture, performance, and tools that empower and accelerate other engineers.Demonstrated ownership: proactively identifying risks and opportunities, driving projects to completion, and adapting quickly.A strong focus on measurement: able to instrument, define metrics, conduct experiments, and iterate based on data-driven insights.

Join Our Team as an iOS EngineerAt Speak, we are on a mission to transform language learning for everyone.Language learning can significantly enhance lives by connecting individuals to new cultures, career opportunities, and communities. With over two billion people globally striving to learn a language, the traditional approach of one-on-one tutoring remains challenging to access at scale and has seen little innovation in recent years. Speak aims to change this by developing a human-level, AI-driven tutor that fits in your pocket—a conversation-first platform that empowers learners to engage in dialogue, receive real-time feedback, and progress through meticulously crafted lessons. Our goal is to provide a complete journey from novice to confident speaker in multiple languages.Launched in South Korea in 2019, Speak has quickly established itself as the leading language learning app, now catering to learners across various markets and offering support for over 15 languages. As a premier AI company, we have secured over $150 million in venture funding from notable investors, including OpenAI, Accel, Founders Fund, and Khosla Ventures. Our diverse team is spread across San Francisco, Seoul, Tokyo, Taipei, and Ljubljana.About the RoleAs a Mobile iOS Engineer on Speak’s engineering team, you'll play a pivotal role in enhancing our content delivery, conducting A/B testing on monetization features, and facilitating the launch of new markets and languages. You'll work closely with backend engineers, as well as our Product and Design partners, and be responsible for deploying product features to millions of users.Your ResponsibilitiesEnhance the “freemium” experience to boost user conversions.Assist in the launch of new markets and languages.Implement various paywall tests, including pricing strategies, design modifications, delayed paywalls, and special offers.Refine our speech-to-text capabilities.Enhance our audio and video streaming functionalities.Your Qualifications3+ years of experience in mobile engineering, ideally within a dynamic startup environment.Proficiency in Swift, with a solid grasp of mobile architectures such as MVC and MVVM.Bonus: Experience with SwiftUI and mobile streaming technologies.

Join Atlas as an iOS Engineer and play a crucial role in designing innovative mobile applications that enhance user experiences. You will collaborate with cross-functional teams to deliver high-quality software solutions, ensuring seamless integration with backend services. Your expertise will contribute to the development of cutting-edge features that delight our users.As a member of our dynamic team, you will have the opportunity to implement best practices in mobile development, optimize app performance, and stay up-to-date with the latest industry trends. If you are passionate about mobile technology and eager to make an impact, we want to hear from you!

About SesameAt Sesame, we envision a world where technology seamlessly integrates with our lives, evolving computers into lifelike partners that can see, hear, and communicate in the most human-like ways. We are on a mission to create innovative voice agents that become an integral part of our everyday routines. Our diverse team comprises founders from Oculus and Ubiquity6, along with leading talents from Meta, Google, and Apple, all possessing a wealth of knowledge in both hardware and software development. Join us as we redefine the future of computing.About the RoleWe are seeking a talented and seasoned iOS Engineer to play a pivotal role in developing the Sesame app, which powers our cutting-edge wearable devices. You will be at the forefront of designing, architecting, and implementing our iOS application that enhances user engagement—from initial setup and account management to personalized experiences and firmware updates. Collaborating closely with design, firmware, and backend teams, you will create an intuitive and delightful user experience that bridges our hardware with the digital landscape.Responsibilities:Develop and refine Sesame’s standalone companion app, establishing a new standard in consumer product categories, while maintaining a strong emphasis on quality and craftsmanship.Collaborate with hardware and firmware teams to create a fluid iOS user experience that seamlessly integrates with Sesame’s wearable technology.Coordinate with cross-functional teams in engineering, design, and product management to deliver complex projects that exceed user expectations.Partner with fellow iOS, Android, and web engineers to define and advance Sesame's mobile and web strategy.Write robust, clean, and maintainable code with a strong focus on performance and reliability.Engage in code reviews, continuous integration/continuous deployment (CI/CD) processes, and oversee App Store release cycles.

Are you a seasoned iOS Engineer looking to take your career to the next level? Join our dynamic team at 360 IT Professionals, where innovation meets excellence. We are seeking a talented and experienced Senior iOS Engineer who will play a pivotal role in the development of cutting-edge mobile applications.In this role, you will collaborate with cross-functional teams to design, build, and maintain high-quality iOS applications. Your expertise will help us deliver exceptional user experiences and drive our mobile strategy forward.

Join Rylo, a cutting-edge camera technology company that revolutionizes video capturing with unparalleled stabilization software and a user-friendly smartphone app. Our innovative solution is developed by a talented team of former engineers from Instagram and Apple, ensuring the highest quality in video production. With Rylo, capturing stunning videos is as simple as pressing a button — no more worries about framing or stabilization.See Rylo in actionWe are seeking a skilled iOS Engineer with extensive experience in developing user interfaces using the iOS SDK. The ideal candidate will possess strong problem-solving abilities, exceptional organizational skills, and a detail-oriented mindset. If you are eager to contribute to a passionate team dedicated to enhancing photography and videography experiences, we would love to hear from you!

Exciting OpportunityWe are seeking a Senior SDK Engineer to play a pivotal role as an individual contributor on our iOS SDK. You will be responsible for owning key features or subsystems from initial design through implementation and ongoing maintenance.This position offers a unique chance to work at the dynamic crossroads of SDK development, machine learning, and robust data infrastructure. Join us in crafting innovative solutions that advance advertising technology, impacting billions of global ad experiences while maintaining a strong focus on privacy and compliance.

Join 360IT Professionals as an iOS Engineer, where you will play a crucial role in developing innovative mobile applications for our diverse clientele. You will collaborate closely with cross-functional teams to design, implement, and maintain high-quality software solutions that enhance user experience.

Join Perplexity AI as a skilled iOS Engineer and play a pivotal role in transforming the way users navigate the web. You'll be instrumental in developing and enhancing Comet, our innovative browser designed specifically for iOS.We seek a candidate with exceptional programming expertise, a keen interest in artificial intelligence and large language models, and a dedication to providing an outstanding user experience supported by a sophisticated user interface.Key ResponsibilitiesCraft a high-performance native iOS application that will be enjoyed by millions globally.Maintain a rigorous standard of quality in both user and developer experiences.Collaborate closely with design teams to create fast, intuitive user interfaces.Engage with data science and machine learning teams to evaluate and enhance the overall user journey.Partner with infrastructure and QA teams to streamline deployment processes, including testing, release, and monitoring.QualificationsA minimum of 5 years of industry experience.Solid understanding of Swift and proven experience with a modern iOS tech stack, including SwiftUI (iOS 16+) and UIKit.A passion for creating beautiful user interfaces, excellent user experiences, and writing reusable, testable code.Strong grasp of low-level details and the ability to profile and optimize app performance.Comfortable working in a small, agile team, demonstrating ownership and initiative.A genuine enthusiasm for iOS development and exploring the latest advancements in iOS and iPadOS.(Bonus) Experience in browser development is a plus.

Join our dynamic team at Sonsoft Inc. as an iOS Developer. In this role, you will be responsible for designing, developing, and maintaining innovative applications for Apple devices. You will work closely with cross-functional teams to deliver high-quality software solutions that enhance user experiences.