Principal iOS Engineer – Testing Specialist
Merrimack, NH
Category: Development
Industry: Financial Services
Reference ID: JN -012026-105247
Date Posted: 03/28/2026
Shortcut: http://careers.eliassen.com/cEIa8F
Description:
Hybrid Every other week onsite/5 days in Merrimack, NH
The organization seeks a Principal iOS Engineer focused on testing to build high-quality mobile experiences across iPhone, iPad, and wearables. The role will design, develop, and test native iOS features using Swift, SwiftUI, and modern architectures while partnering across cross-functional teams. The position emphasizes automated testing, CI/CD integration, and performance, with opportunities to influence mobile architecture and collaborate on broader platform capabilities. Your work will strengthen customer financial well-being through reliable, accessible, and secure mobile solutions.
Due to client requirements, applicants must be willing and able to work on a w2 basis. For our w2 consultants, we offer a great benefits package that includes Medical, Dental, and Vision benefits, 401k with company matching, and life insurance.
Rate: $70.00 to $75.00/hr. w2
Responsibilities:
- Design and develop native iOS features and maintain high-quality application code.
- Apply testing and testability principles to influence software design, reliability, and security.
- Author and maintain automated tests including unit, component, integration, functional, performance, scenario, and interoperability tests.
- Integrate automated tests into CI/CD pipelines and improve release velocity and production health.
- Enable and develop mobile UI automation using XCTest and XCUITest, and support Android test automation where applicable.
- Collaborate within cross-functional teams to deliver end-to-end customer experiences and reusable components.
Experience Requirements:
- 6+ years building native iOS apps using Swift, SwiftUI, UIKit, Objective-C, and Xcode in an agile environment.
- Expertise with testing frameworks and concepts using XCTest and XCUITest.
- Experience with Swift concurrency, Combine, and asynchronous programming.
- Knowledge of iOS architectures such as MVVM and Clean Architecture.
- Proficiency with Apple Human Interface Guidelines and accessible iOS development.
- Advanced Git, branching strategies, and CI/CD practices.
- Knowledge of HTTP APIs, networking, and internet fundamentals.
- Experience with OAuth and OpenID Connect security patterns.
- Strong working knowledge of AWS services including EC2, Lambda, serverless computing, and DynamoDB.
- Experience or willingness to learn Android, web, and cloud technologies.
- Understanding of containerization, Docker, and orchestration (preferred).
- End-to-end architecture experience with focus on reusable components, accessibility, security, A/B testing, personalization, analytics, and measurement.
Education Requirements:
- AWS-related certification (preferred).
Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range.
W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked-in state/locality.
If anyone reaches out to you about an open position connected with Eliassen Group, please ensure that you are working directly with us by confirming the following:
· When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
· Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group.
If you have any indication of fraudulent activity, please contact fraud@eliassen.com.
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Eliassen Group is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status. Eliassen Group’s Affirmative Action Plan (AAP) is available for inspection by any employee or applicant for employment upon request, during normal business hours of Monday through Friday, 8:30am to 5:30pm EST. Interested persons should contact Phaedra Wells at pwells@eliassen.com for assistance. It is unlawful in Massachusetts and Maryland 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.
Applicants with disabilities that believe they require an accommodation or assistance with a position, please email our HR team at hradmin@eliassen.com. This email inbox is designed exclusively to assist job seekers whose disability prevents them from being able to apply online. Emails sent for other purposes will not receive a response.
Please be advised that a number of fraudulent job postings have been released under the Eliassen Group brand.
Unfortunately, fraudulent job postings can happen. If anyone reaches out to you about an open position connected with Eliassen Group, never provide personal or financial information to anyone who is not clearly associated with Eliassen Group
If anyone seemingly from Eliassen Group has ever requested this personal information in the past or does so in the future, please contactInfoSec@eliassen.com.
Please ensure that you are working directly with us by confirming the following:
- When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
- Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group, as indicated above