Senior Software Engineer – Mobile Development (Android)
The City of Philadelphia's Office of Innovation and Technology is hiring a Senior Android Developer to design, build, and maintain Android applications supporting City services, using Kotlin and Jetpack Compose. The role leads architecture decisions, integrates with backend APIs, ensures accessibility and security, and mentors junior engineers.
- Compensation
- $105K–$110K / yr
- Location
- Philadelphia, PA, us
- Work setup
- Not specified
- Seniority
- Senior
- Employment
- Part time
- Experience
- 5+ years
- Category
- Mobile
- Posted
Skills
Must have
- 5+ years of professional Android development experience
- Strong proficiency in Kotlin, Android Studio, and modern Android frameworks (Jetpack, Compose, Coroutines)
- Experience building and deploying applications to Google Play Store or enterprise distribution
- Experience integrating RESTful APIs and working with backend services
- Strong understanding of mobile architecture, design patterns, and performance optimization
- Solid understanding of Android fundamentals (Activities, Fragments, Services, Content Providers)
- Experience with Android Studio, Gradle build system, and Android SDK tools
- Knowledge of Material Design principles and Android UI/UX best practices
- Experience with version control systems, preferably Git
- Understanding of RESTful APIs and mobile app security best practices
- Knowledge of automated testing frameworks for mobile applications
- Familiarity with Google Play Console and app store submission processes
- Familiarity with agile or iterative development processes
- Excellent problem-solving skills and attention to detail
- Strong communication skills and cross-functional collaboration
- Ability to mentor and support other engineers
- Commitment to equity, accessibility, and inclusive design
- Must be a City of Philadelphia resident within six months of hire
Nice to have
- Bachelor's degree (or equivalent job-related experience)
- Prior team leadership or seniority
- Have developed and deployed at least one Android application to the Google Play Store
- Proficiency in React Native development demonstrated through portfolio or work samples
- Understanding of modern mobile platform and common architectures, including hardware/feature differences across devices
- Server-side programming languages such as Node.js (TypeScript)
- Command line and shell scripting
- Web application security concerns and mitigations
- SQL and relational databases such as PostgreSQL, Oracle, MSSQL
- Amazon Web Services (AWS)
- Containerization and automated test/deployment pipelines
- API design and development
Full description
OIT is seeking a Senior Android Developer to lead the design, development, and maintenance of highquality Android 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 Android 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 Android applications using Kotlin and modern Android frameworks like jetpack compose
- Lead technical architecture decisions and establish best practices for Android development
- Collaborate with product, design, and backend engineering teams to define requirements and deliver high‑quality features
- Help to translate user needs and business goals into scalable, maintainable mobile solutions
- Collaborate with UX/UI designers to implement pixel-perfect designs optimized for Android platforms and design conventions
- Ensure applications comply with Google Play Store guidelines and submission requirements
- Write clean, maintainable code following Android development best practices and coding standards
- Integrate Android 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 Android 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 non‑technical audiences
Competencies, Knowledge, Skills and Abilities
- Deep understanding of modern Android development principles and mobile UX patterns
- Strong proficiency in native Android development with focus on Android platform optimization