Principal Software Engineer, Mobile

Socket.dev; California (MO); Hybrid; USD 247,000 - 396,000; Full time

Benefits offered by this job

Flextime

Onboarding program

Leadership training for Titans

Bonusly

Medical insurance

Dental insurance

Vision insurance

FSA/HSA

401k match

Maven maternity support

Job summary

ServiceTitan is the operating system for the trades. Our mobile platform puts that operating system in the hands of technicians and business owners in the field, and it has to work flawlessly, at scale, every time.

We're looking for a Principal Software Engineer to set the technical direction for that platform across iOS and Android, and raise the bar for how our mobile engineers build, ship, and scale software.

Qualifications

• 15+ years of industry experience building large-scale mobile apps.
• 10+ years in senior engineering roles designing APIs and tools.
• Expert-level native iOS (Swift, UIKit/SwiftUI, Xcode) and/or native Android (Kotlin, Jetpack) development.
• Proven experience architecting mobile apps for scale: modularization, offline-first design, DI, clean separation of concerns.
• Experience modularizing monolithic codebases into domain-based architectures.
• Strong background in mobile performance engineering: startup time, memory, battery, rendering, crash-free rates.
• Experience with mobile observability/monitoring tools (Firebase Crashlytics, Datadog, New Relic, Application Insights).
• Experience with mobile CI/CD pipelines and release automation (Fastlane, Bitrise, GitHub Actions, TeamCity).
• Knowledge of version control, unit/UI testing, debugging, profiling in mobile dev.
• Experience integrating large-scale third-party SDKs into mobile apps.
• Cloud infrastructure for mobile backends (Azure/AWS).
• Empathy for users and championing their experience; strong communication and technical writing.

Responsibilities

• Own the short- and long-term technical vision for the mobile platform, end to end.
• Design, build, and improve critical systems powering ServiceTitan's iOS and Android apps; improve security, availability, reliability, and performance.
• Build tools and systems that increase the efficiency of every mobile engineer; improve performance and quality across the mobile org.
• Identify opportunities to extract or build shared systems for multiple mobile teams.
• Mentor and guide engineers across the mobile organization and beyond.
• 60% development, 40% everything else.
• Partner with Recruiting on interviewing, lead gen (tech talks) and screening.
• Contribute to the mobile roadmap and resource planning.
• Define metrics for success and track them consistently.
• Communicate clearly with cross-functional partners — engineers, product managers, customers, and other stakeholders.

Skills

Mobile engineering

Senior roles

APIs design

Native iOS

Swift

SwiftUI

Kotlin

Android

Performance engineering

Observability

CI/CD

Release automation

Testing

Cloud infrastructure

Communication

Technical writing

Education

B.S./M.S./Ph.D. in CS/Engineering

Tools

Firebase Crashlytics

Datadog

New Relic

Application Insights

Fastlane

Bitrise

GitHub Actions

TeamCity

Job description

Principal Software Engineer, Mobile

ServiceTitan is the operating system for the trades. Our mobile platform puts that operating system in the hands of technicians and business owners in the field, and it has to work flawlessly, at scale, every time. We're looking for a Principal Software Engineer to set the technical direction for that platform — across iOS and Android — and raise the bar for how our mobile engineers build, ship, and scale software.

You’ll own platform architecture, drive the long-term technical vision for mobile, and lead major investments in performance, reliability, observability, and developer productivity. You’ll influence mobile strategy across multiple product teams and build systems that scale to millions of users in the field.

What you’ll do

• Own: Own the short- and long-term technical vision for the mobile platform, end to end.

• Design and revamp: Design, build, and improve the critical systems powering ServiceTitan's iOS and Android apps. Improve the security, availability, reliability, and performance of our mobile products. Drive and participate in major architectural and strategic decisions, especially those related to scale.

• Improve efficiency: Build tools and systems that increase the efficiency of every mobile engineer. Improve performance, processes, and quality across the mobile organization.

• Discover: Identify opportunities to extract or build shared systems that benefit multiple mobile teams.

• Empower: Mentor and guide engineers across the mobile organization and beyond.

• 60% development, 40% everything else.

• Team building: Partner with Recruiting on interviewing candidates and co-own lead generation (tech talks) and screening.

• Strategy: Contribute to the mobile roadmap and resource planning.

• Measure success: Define metrics for success and track them consistently.

• Collaborate: Communicate clearly with cross-functional partners — engineers, product managers, customers, and other stakeholders.

What you’ll need

• 15+ years of industry experience, including building large-scale, consumer or enterprise mobile applications.

• 10+ years in senior engineering roles, designing APIs, abstractions, and tools used by other engineers.

• Expert-level knowledge of native iOS development (Swift, UIKit/SwiftUI, Xcode) and/or native Android development (Kotlin, Jetpack, Android Studio) — deep expertise in one platform with strong working knowledge of the other.

• Proven experience architecting mobile apps for scale: modularization, offline-first design, dependency injection, and clean separation of concerns.

• Experience taking existing mobile codebases from monolithic to modular, domain-based architectures.

• Strong background in mobile performance engineering — app startup time, memory and battery efficiency, rendering performance, and crash‑free rates.

• Experience with mobile observability and monitoring tools (for example, Firebase Crashlytics, Datadog, New Relic, or Application Insights).

• Experience with mobile CI/CD pipelines and release automation (for example, Fastlane, Bitrise, GitHub Actions, or TeamCity).

• Deep familiarity with version control, unit and UI testing, debugging, and profiling tools standard to mobile development.

• Experience integrating large-scale third-party SDKs and APIs into mobile apps.

• Working knowledge of cloud infrastructure supporting mobile backends (Azure, AWS, or similar).

• Ability to empathize with our users and champion their experience.

• Strong communication and technical writing skills.

• B.S., M.S., or Ph.D. in Computer Science, Engineering, or a related technical field.

Use of AI Technology:

We use technology, including automated and AI-assisted tools, to support certain aspects of our recruitment process. These tools are designed to improve efficiency and enhance the candidate experience. AI tools are not used to make hiring decisions; all hiring decisions are made by our hiring teams.

What We Offer:

When you join our team, you’re not just accepting a job. You’re making a career move. Here’s how we’ll support you in doing some of the most impactful work of your career:

• Flextime, recognition, and support for autonomous work: Flexible time off with ample learning and development opportunities to continue growing your career. We offer a comprehensive onboarding program, leadership training for Titans at all levels, and other programs and events. Great work is rewarded through Bonusly, peer-nominated awards, and more.
• Holistic health and wellness benefits: Company-paid medical, dental, and vision (with 100% employer paid options and 90% coverage for dependents), FSA and HSA, 401k match, and telehealth options including memberships to One Medical.
• Support for Titans at all stages of life: Parental leave and support, up to $20k in fertility services (i.e. IUI and IVF), surrogacy, and adoption reimbursement, on demand maternity support through Maven Maternity, free breast milk shipping through Maven Milk, pet insurance, legal advisory services, financial planning tools, and more.

At ServiceTitan, we celebrate individuality and uniqueness. We believe that the convergence of fresh perspectives and experiences from all walks of life is what makes our product and culture so great. We strongly encourage people from underrepresented groups to apply. We do not discriminate against employees based on race, color, religion, sex, national origin, gender identity or expression, age, disability, pregnancy (including childbirth, breastfeeding, or related medical condition), genetic information, protected military or veteran status, sexual orientation, or any other characteristic protected by applicable federal, state or local laws.

ServiceTitan is committed to fair and equitable compensation for all of our employees. We thoughtfully consider a wide range of factors when determining individual compensation, which may change over time. We comply with all applicable minimum wage laws. For candidates in the United States, the good faith salary ranges estimate for this role isZone 1: $263,800 USD - $395,600 USD Applicable for: CA, CT, DC, MD, MA, NJ, NY, VA, and WAZone 2: $246,500 USD - $369,700 USD Applicable for: All other US locations.International Compensation for candidates residing outside the United States will vary by location and will be discussed during the hiring process. Actual compensation within a range is determined by factors including relevant experience, skill set, qualifications, and performance. In addition to base salary, our total compensation package includes an annual bonus, equity, and a holistic suite of benefits.