iOS Engineer II (Connectivity)

Whoop; Boston (MA); On-site; USD 125,000 - 175,000; Full time

Benefits offered by this job

Generous equity package

Job summary

WHOOP seeks an iOS Software Engineer II to develop and maintain applications that ensure seamless communication between wearable sensors and mobile platforms. The successful candidate will have at least 2 years of experience in iOS development, proficiency in Swift, and an understanding of Bluetooth Low Energy. This role is based in Boston, MA, and offers a competitive salary range of $125,000 to $175,000, along with benefits and an equity package.

Qualifications

• 2+ years of professional iOS software engineering experience.
• Proficiency in Swift and familiarity with iOS system APIs, concurrency, and memory management.
• Experience building and maintaining production-quality mobile applications.

Responsibilities

• Build and maintain iOS application components that interface with WHOOP hardware over BLE and Wi-Fi.
• Contribute to background services for device connectivity and data transfer.
• Collaborate with firmware, mobile, and cloud engineers to resolve distributed system issues.

Skills

Swift

iOS system APIs

Asynchronous programming

Bluetooth Low Energy (BLE)

Education

BS or MS in Computer Science, Computer Engineering, or related field

Tools

Jira

Confluence

GitHub

Job description

At WHOOP, we’re on a mission to unlock human performance and healthspan. WHOOP empowers people to perform at a higher level through a deeper understanding of their bodies and daily lives. We handle massive amounts of data continuously streaming to the cloud from people improving their health and wellness to the world’s greatest sports teams and athletes, requiring a fault‑tolerant and highly available product.

The Connectivity Software Team builds the critical link between WHOOP hardware, the iOS app, and the cloud. As an iOS Software Engineer II on this team, you’ll help build and maintain the software that enables WHOOP’s wearable sensors to communicate seamlessly with the mobile platform. You’ll contribute to connectivity experiences that are reliable, efficient, and largely invisible to the member — ensuring dependable data flow across our ecosystem.

Responsibilities

• Build and maintain iOS application components that interface with WHOOP hardware over Bluetooth Low Energy (BLE), Wi‑Fi, and related communication protocols.

• Contribute to background and system‑level iOS services responsible for device connectivity, synchronization, and data transfer.

• Write clean, maintainable Swift code using modern iOS patterns and frameworks such as Combine and Swift concurrency.

• Collaborate closely with firmware, mobile, and cloud engineers to investigate and resolve issues across distributed systems.

• Improve the reliability, performance, and efficiency of the WHOOP connectivity experience.

• Contribute to scalable, testable, and maintainable software architecture within the Connectivity team.

• Participate in code reviews, technical discussions, testing, and release processes for the iOS application.

• Document features, implementation details, and operational knowledge using tools such as Jira, Confluence, and GitHub.

Qualifications

• BS or MS in Computer Science, Computer Engineering, or a related technical field, or equivalent practical experience.

• 2+ years of professional iOS software engineering experience.

• Proficiency in Swift and familiarity with iOS system APIs, concurrency, and memory management.

• Experience building and maintaining production‑quality mobile applications.

• Familiarity with asynchronous and reactive programming concepts (e.g., async/await, Combine, or similar).

• Ability to debug and troubleshoot technical issues across mobile applications and connected systems.

• Strong collaboration and communication skills with a willingness to learn from and work across disciplines.

• Curiosity, ownership, and a growth mindset when approaching new technical challenges.

Nice to Have

• Experience working with Bluetooth Low Energy (BLE), Core Bluetooth, or other device connectivity technologies.

• Familiarity with networking concepts such as Wi‑Fi, background transfers, or low‑level communication protocols.

• Experience working with hardware‑integrated mobile applications or IoT systems.

• Exposure to performance optimization, battery efficiency, or reliability improvements in mobile apps.

• Interest in leveraging AI‑assisted development tools to improve engineering productivity.

This role is based in the WHOOP office located in Boston, MA. The successful candidate must be prepared to relocate if necessary to work out of the Boston, MA office.

WHOOP is an Equal Opportunity Employer and participates in E‑verify to determine employment eligibility. It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

The U.S. base salary range for this full‑time position is $125,000‑$175,000. Salary ranges are determined by role, level, and location. Within each range, individual pay is based on factors such as job‑related skills, experience, performance, and relevant education or training.

In addition to the base salary, the successful candidate will also receive benefits and a generous equity package.