Senior Software Engineer – Mobile Development (iOS)

OIT is seeking a Senior iOS Developer to lead the design, development, and maintenance of high quality iOS applications that support City services and operations. This role will work closely with product managers, designers, backend engineers, and City department stakeholders to deliver secure, accessible, user centered mobile experiences. 

The Senior iOS Developer will strongly influence the full mobile development lifecycle from technical discovery and architecture through implementation, testing, deployment, and ongoing iteration. This role requires strong engineering expertise, a collaborative mindset, and a commitment to building digital tools that improve the lives of Philadelphia residents, businesses, and City employees. 

Essential Functions 

• Design, build, and maintain advanced iOS applications using Swift and modern iOS frameworks 

• Lead technical ios architecture decisions and establish best practices for mobile development 

• Collaborate with product, design, and backend engineering teams to define requirements and deliver high quality features 

• Translate user needs and business goals into scalable, maintainable mobile solutions 

• Collaborate with UX/UI designers to implement pixel-perfect designs optimized for iOS platforms 

• Integrate iOS applications with APIs, backend services, and City data systems 

• Ensure applications meet standards for accessibility, security, and performance 

• Conduct code reviews, mentor junior developers, and contribute to team-wide engineering excellence 

• Implement automated testing, CI/CD pipelines, and monitoring tools to support reliable deployments 

• Troubleshoot and resolve technical issues across the mobile stack 

• Stay current with iOS technologies, tools, and best practices, and advocate for continuous improvement 

• Support agile delivery practices, including sprint planning, standups, and retrospectives 

• Communicate progress, risks, and technical decisions clearly to technical and nontechnical audiences 

Competencies, Knowledge, Skills and Abilities 

• Deep understanding of modern iOS development principles and mobile UX patterns 

• Ability to balance long‑term technical strategy with hands‑on implementation 

• Ability to manage multiple priorities in a dynamic public‑sector environment 

• Commitment to equity, accessibility, and inclusive design 

• Strong analytical and debugging skills 

• Ability to mentor and support other engineers 

• Solid understanding of iOS development fundamentals including UIKit, Core Data, and iOS frameworks 

• Experience with Xcode, Interface Builder, and iOS development tools 

• Knowledge of Apple's Human Interface Guidelines and iOS design principles 

• Proficiency in Swift/Objective-C programming languages 

• Familiarity with App Store Connect and iOS app submission processes 

• Strong problem-solving skills and ability to debug complex mobile applications 

• Experience with version control systems, preferably Git 

While you won’t necessarily be working with these technologies every day, you should have a broad enough understanding of them to help support your team.  

• Understanding of the modern mobile platform and common architecture  

• Strong understanding of the key differences in supported hardware and features across the mobile device landscape  

• One or more cross platform mobile frameworks 

• Server-side programming languages such as Node.js 

• Command line and shell scripts  

• Web application security concerns and ways to mitigate them  

• SQL, and usage of relational databases such as PostgreSQL, Oracle, MSSQL  

• Amazon Web Services (AWS)  

• Containerization  

• Automated test/deployment pipelines  

• API design and development 

We care more about what you can do than where you learned how to do it. That said, a bachelor’s degree is a good foundation for the work, and job-related experience around the competencies above is acceptable as well. 

• 5+ years of professional iOS development experience.  

• Supervisory or management experience a plus 

• Strong proficiency in Swift, Xcode, and modern iOS frameworks (UIKit, SwiftUI, Combine, etc.) 

• Experience building and deploying applications to the App Store or enterprise distribution 

• Experience integrating RESTful APIs and working with backend services 

• Familiarity with agile or iterative development processes 

• Strong understanding of mobile architecture, design patterns, and performance optimization 

• Excellent problem‑solving skills and attention to detail 

• Strong communication skills and experience collaborating with cross‑functional teams 

Salary Range: $105,000 - $110,000

All applications must include a cover letter. Applications without a cover letter will be considered incomplete.  

• Have developed and deployed at least one iOS application to the Apple App Store 

• Demonstrate proficiency in React Native development through portfolio or work samples

Did you know? 

• We offer Comprehensive health coverage for employees and their eligible dependents 

• Our wellness program offers eligibility into the discounted medical plan 

• Employees receive paid vacation, sick leave, and holidays 

• Generous retirement savings options are available 

• Pay off your student loans faster - As a qualifying employer, City of Philadelphia employees are eligible to participate in the Public Service Loan Forgiveness program. Join the ranks of hundreds of employees who have already benefited from this program and achieved student loan forgiveness. 

• Enjoy a Free Commute on SEPTA - Starting September 1, 2023, eligible City employees will no longer have to worry about paying for SEPTA public transportation. Whether you're a full-time, part-time, or provisional employee, you can seize the opportunity to sign up for the SEPTA Key Advantage Program and receive free Key cards for free rides on SEPTA buses, trains, trolleys, and regional rails. 

• Unlock Tuition Discounts and Scholarships - The City of Philadelphia has forged partnerships with over a dozen esteemed colleges and universities in the area, ensuring that our employees have access to a wide range of tuition discounts and scholarships. Experience savings of 10% to 40% on your educational expenses, extending not only to City employees but in some cases, spouse and dependents too! 

 
*The successful candidate must be a city of Philadelphia resident within six months of hire 
 

Effective May 22, 2023, vaccinations are no longer required for new employees that work in non-medical, non-emergency or patient facing positions with the City of Philadelphia. As a result, only employees in positions providing services that are patient-facing medical care (ex: Nurses, doctors, emergency medical personnel), must be fully vaccinated. 

The City of Philadelphia is an Equal Opportunity employer and does not permit discrimination based on race, ethnicity, color, sex, sexual orientation, gender identity, religion, national origin, ancestry, age, disability, marital status, source of income, familial status, genetic information or domestic or sexual violence victim status. If you believe you were discriminated against, call the Philadelphia Commission on Human Relations at 215-686-4670 or send an email to faqpchr@phila.gov. For more information, go to: Human Relations Website: 
http://www.phila.gov/humanrelations/Pages/default.asp