Sr. iOS Engineer: Swift/SwiftUI, GraphQL / AppSync / AWS for B2C apps; AI 1st culture

Location:

Work can be done remotely from the US No third-party agency submissions. Agencies, please do not call or email . Independent C2C candidates only. KORE1, a nationwide provider of staffing and recruiting solutions, has an immediate opening for a Sr. i

OS Engineer:

Swift/SwiftUI, GraphQL / AppSync / AWS for B2C apps; AI 1st culture This organization supports millions of users navigating health journeys, delivering a highly scaled, consumer-facing platform focused on communication, care coordination, and community. With a lean, high-performing engineering team and modern cloud-based architecture (AWS, serverless, GraphQL), the company is continuing to invest in its mobile experience, performance, and feature velocity You will contribute iOS software engineering in Swift and SwiftUI to enhance, extend, and maintain a production iOS application currently in the App Store, serving a large and active user base. Working within cross-functional Agile scrum teams, you will contribute to design discussions; implement prototypes for feedback; research and integrate third-party technologies; and deliver high-quality production code. This role is heavily focused on new feature development, while also contributing to ongoing improvements in test coverage, performance, and architecture. You will collaborate closely with product managers, backend engineers, and QA, operating as a fully embedded team member. The environment is highly collaborative, fast-moving, and team-centric, with strong emphasis on communication, code quality, and continuous improvement. This is a full-time contract role (40 hours/week), open-ended in duration with potential for long-term engagement or conversion based on business needs.

Responsibilities:

Expertly develop the iOS mobile application using Swift and SwiftUI, delivering high-quality, scalable, and performant code. Collaborate with product managers and cross-functional teams to translate user stories and business requirements into intuitive mobile experiences. Contribute to architectural discussions, including application structure, performance optimization, and technical decision-making (with opportunity to influence and improve existing architecture). Implement prototypes and iterate quickly based on feedback in an Agile environment. Work extensively with GraphQL APIs (via AWS AppSync) to integrate and manage data across mobile and backend systems. Evaluate and integrate third-party SDKs and libraries (e.g., AWS SDKs, Apollo), ensuring performance and maintainability. Participate in code reviews, providing feedback and helping maintain high engineering standards. Write unit tests and contribute to improving overall test coverage; partner with QA on broader testing strategy. Contribute to CI/CD processes and deployment pipelines as part of the shared engineering responsibility model. Troubleshoot and resolve bugs, performance issues, and production incidents. Support performance optimization efforts (startup time, responsiveness, memory usage) in a consumer-facing application at scale. Mentor junior developers where applicable and contribute to team knowledge sharing. Contribute documentation, technical discussions, and continuous improvement initiatives. Experience and Technical Qualifications Strong experience building or supporting consumer-facing applications at scale (App Store presence or equivalent strongly preferred). 5+ years developing iOS mobile applications using Swift and SwiftUI (required; 100% SwiftUI environment). Strong expertise in the iOS ecosystem, including app lifecycle, performance optimization, and modern UI development patterns. Familiarity with modern iOS architecture patterns (MVVM, etc.) is preferred but flexible. Experience integrating third-party SDKs and APIs required Hands-on experience working with GraphQL APIs (depth preferred, including schema understanding, performance considerations, and caching strategies). Experience with AWS infrastructure, particularly AppSync, strongly preferred; familiarity with serverless components (Lambda, DynamoDB, Kinesis) is a plus. Exposure to AI-assisted development tools and workflows is a plus; interest in leveraging AI to improve development productivity is expected. Strong experience with unit testing and test automation practices (XCTest or similar). Experience working in Agile environments with cross-functional scrum teams. Experience with performance tuning, debugging, and production support. Experience deploying code to CI/CD pipelines and shared deployment processes. Compensation depends on experience but is typically around $55/hr W2; some flexibility for C2C (though no 3rd party firm candidates are welcome).

ABOUT KORE1

Specializing in professional and technical recruiting, KORE1 is committed to supporting top IT, Engineering, Creative, Scientific, Accounting and Finance professionals in their career paths. We build deep relationships with leading companies, connecting them to exceptional talent every day. With extensive industry expertise and unmatched opportunities, our goal is to provide a unique experience for our contractors and consultants as they prepare for their next role. We are passionate about matching the right people with the right companies. Kore1 provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability or genetics. In addition to federal law requirements, Kore1 complies with applicable state and local laws governing nondiscrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training. Kore1 expressly prohibits any form of workplace harassment based on race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, genetic information, disability, or veteran status. Improper interference with the ability of Kore1's employees to perform their job duties may result in discipline up to and including discharge.