Senior Principal Software Engineer

Senior iOS Engineer

The Connectivity Software Team builds the critical link between WHOOP hardware, ...

Location

United States , Boston

Salary:

150000.00 - 210000.00 USD / Year

Whoop

Expiration Date

Until further notice

Requirements

BS or MS in Computer Science, Electrical Engineering, or a related technical field, or equivalent experience
3+ years of professional iOS software engineering experience with a solid foundation in Swift, iOS system APIs, concurrency, and memory management
Hands-on experience with Combine and background task processing for non-UI iOS features
Demonstrated examples applying architectural and platform-based software design principals to build scalable, modular, testable software
Experience debugging and diagnosing issues across complex or distributed systems (for example: firmware, mobile, backend) is a strong plus
Excellent collaboration and communication skills with a focus on cross-functional problem solving
Strong commitment to embracing and leveraging AI tools in day-to-day tasks, ensuring AI-assisted work aligns with the same high-quality standards as personal contributions

Job Responsibility

Design, implement, and maintain iOS application components that interface directly with WHOOP hardware over Bluetooth Low Energy (BLE), Wi-Fi, or other communication protocols
Develop background and system-level iOS services that ensure reliable device connectivity, synchronization, and data transfer
Leverage Swift and Combine to build resilient, efficient, and maintainable reactive pipelines for connectivity and data management
Collaborate closely with embedded firmware, mobile, and cloud engineers to diagnose and resolve issues across a distributed system
Drive continuous improvement of performance, power efficiency, and reliability in the WHOOP connectivity layer
Champion strong software architectural principles for testable, scalable, maintainable software on your own team and across the organization
Document new features and architecture using Jira, Confluence and preparing code using Github feature, develop, and master branches
Participate in the release process, including getting the app built, managing build variants, signing, sending and testing through Firebase, and submitting to the App store

What we offer

competitive base salaries
meaningful equity
benefits
a generous equity package

Fulltime

Principal QA Automation Engineer w/ AI experience

We seek a Principal QA Automation Engineer with a strong background in Cypress, ...

Location

Argentina , Gran Buenos Aires; Capital Federal; Mar del Plata

Salary:

Not provided

BASIC/DEPT®

Expiration Date

Until further notice

Requirements

4+ years of hands-on experience with Cypress for UI and end-to-end automation testing
Expert-level proficiency in TypeScript, JavaScript and Python
Proven experience testing AI-powered or machine learning applications, including AI model validation techniques
Strong understanding of AWS services (e.g., Lambda, S3, SQS, CloudWatch, ECS/EKS) and how to validate applications deployed in cloud environments
Experience with threaded/multi-agent AI tools and how they impact test design and validation
Familiarity with version control (Git), containerization (Docker), and CI/CD pipelines (e.g., GitHub Actions, Jenkins, or CircleCI)
Strong communication, leadership, and mentoring skills

Job Responsibility

Lead the design and implementation of end-to-end test automation frameworks using Cypress with TypeScript
Define quality strategies for applications with AI/ML components, including deterministic and non-deterministic testing approaches
Collaborate with engineering, DevOps, and AI/ML teams to ensure quality across AI-infused features in production environments
Build and scale testing strategies for threaded AI applications running in AWS cloud infrastructure
Integrate automated tests into CI/CD pipelines to support frequent, reliable deployments
Mentor and guide mid- and senior-level QA engineers, setting best practices and driving a culture of quality-first development
Evaluate and introduce new tools, libraries, and frameworks to improve test coverage, performance, and developer experience
Participate in architectural discussions to ensure testability and reliability are baked into software designs from the start
Analyze test results, track quality metrics, and communicate risk and coverage to stakeholders

What we offer

Premium healthcare through OSDE for the employee and their immediate family members
Mendel prepaid card with a monthly allowance for grocery purchases
Monthly reimbursements for Wi-Fi/electricity expenses
Monthly reimbursements for training/English classes
100% covered “Plan Total” membership at Sportclub
Access to a our benefits platform through Bonda
A flexible vacation policy

Fulltime

New

Embedded Software Engineer

This is where new knowledge is discovered. Baxter’s Research and Development tea...

Location

United States , Skaneateles Falls

Salary:

88000.00 - 121000.00 USD / Year

Baxter

Expiration Date

Until further notice

Requirements

Bachelor’s degree in Computer Science, Computer Engineering, Electrical Engineering, or a related field
0+ years of experience in software or embedded systems development (including internships, co-ops, or academic projects)
knowledge in C++ and a UI framework (Qt, JavaScript, React)
understanding of object-oriented programming concepts
familiarity with embedded systems concepts and basic exposure to embedded Linux or similar environments
strong analytical skills, attention to detail, and willingness to learn
ability to communicate clearly, work well in a team environment, and accept feedback
applicants must be authorized to work for any employer in the U.S.

Job Responsibility

Develop embedded software components using C++ and the Qt framework/Javascript REACT under the guidance of senior engineers
collaborate with software engineers, hardware engineers, and product team members to understand system requirements and contribute to software–hardware integration
participate in code reviews, follow coding standards, and learn modern software development practices including testing and debugging techniques
help identify, troubleshoot, and resolve software issues in embedded environments including basic performance and reliability testing
assist with creating and maintaining clear technical documentation for designs, implementations, and test procedures
learn from senior and principal engineers, gradually taking ownership of well-defined features or modules as experience grows

What we offer

Support for Parents
Continuing Education/Professional Development
Employee Health & Well-Being Benefits
Paid Time Off
2 Days a Year to Volunteer
medical and dental coverage starting on day one
basic life, accident, short-term and long-term disability, and business travel accident insurance
Employee Stock Purchase Plan (ESPP) with ability to purchase company stock at a discount
401(k) Retirement Savings Plan (RSP) with employee contributions and company matching
Flexible Spending Accounts

Fulltime

Principal Software Engineer - Senior Vice President

Engineer the future of global finance. At Citi, our Tech team doesn’t just suppo...

Location

United States , Jersey City

Salary:

176720.00 - 265080.00 USD / Year

Citi

Expiration Date

Until further notice

Requirements

10+ years of hands-on professional software development experience
Experience of designing distributed systems, microservices, micro-frontend UIs
Experience of using cloud services such as AWS and distributed systems such as Kafka, Kubernetes, S3, DynamoDB, MongoDB or any other NoSQL database
Experience of following TDD and passionate about clean code principles
Proficiency in programming in Java, Python, JavaScript or React
Solid understanding and experience of using data structures, algorithms and SQL
Able to independently work in fast paced and rapidly changing environment
Bachelor’s degree in computer science or engineering field involving software programming or systems engineering

Job Responsibility

Engineer the future of global finance
Help shape global markets
Build systems that matter
Influence economies
Drive innovation
Mentor and continuous learning
Work on margin and collateral domain transformation
Build technical solutions to complex business problems
Shape the future of product
Work towards fully automated platform

What we offer

Medical
dental & vision coverage
401(k)
Life, accident, and disability insurance
Wellness programs
Paid time off packages including planned time off (vacation), unplanned time off (sick leave), and paid holidays

Fulltime

As a Senior Principal Engineer - React Native in the Client Foundations team, yo...

Location

Germany , Berlin

Salary:

Not provided

Zalando Sverige

Expiration Date

Until further notice

Requirements

Extensive experience developing large-scale React Native applications
Deep architectural fluency in the new React Native architecture, including Fabric, TurboModules, and JSI
Full-stack profiling capabilities, with the proven ability to debug the entire stack from a React component re-render down to specific C++ JSI bindings or native modules in Swift/Objective-C and Kotlin/Java
Expert-level proficiency with native tooling, specifically Xcode Instruments and Android Studio Profilers
Proficient in advanced JS profiling using React Native DevTools and the Memory tab
Performance-first design mindset, knowing precisely when to use tools like react-native-reanimated
History of establishing a culture of performance optimization, including setting performance budgets, integrating monitoring into CI/CD, and spearheading internal training programs
Strategic communicator and mentor, able to guide experienced engineers and explain architectural trade-offs

Job Responsibility

Solve the most complex engineering challenges in Zalando’s React Native migration
Champion a performance-first culture
Deliver best-in-class UI experiences
Elevate engineering excellence and mentorship

What we offer

Employee shares program
40% off fashion and beauty products sold and shipped by Zalando, 30% off Lounge by Zalando, discounts from external partners
2 paid volunteering days per year
Hybrid working model with up to 60% remote per week
Work from abroad for up to 30 working days a year
27 days of vacation a year to start for full-time employees
Relocation assistance available (subject to prior agreement)
Family services, including counseling and support
Health and wellbeing options (including Wellhub, formerly Gympass)
Mental health support and coaching available

Fulltime