Senior Mobile Engineer

Senior Developer – Front End Experience: 7+ years of mobile development, including 3+ years of production Flutter Environment: Startup / High-Growth Work Environment: 5 days onsite, Hazlet, NJ 07730 Focus: Flutter, Mobile Architecture, Scalability & Release Management Position Overview We are looking for a Senior Flutter Developer to join a fast-growing technology company and play a critical role in the next stage of an established consumer-facing mobile platform.

The app is already built and in market. This person will be highly hands-on within the existing product while helping drive the architecture, scalability, and technical direction of the front-end team as the company grows. The platform supports multiple white-labeled client applications from a shared codebase , making architecture, scalability, release management, and code quality especially important.

This is a true startup environment. We are looking for someone who is passionate, sharp, collaborative, and comfortable taking significant ownership . Strong communication skills are essential, as this person will work closely with leadership, backend teams, developers, product stakeholders, and clients.

This position is onsite 5 days per week.

What You'll

Own Architecture & Scalability: Design and evolve an app architecture that supports multiple white-labeled clients using theming, feature flags, and configuration-driven builds.

Flutter Development

Remain highly hands-on developing and improving an existing production Flutter application.

Release & Platform Management

Own the end-to-end release pipeline across concurrent client builds, including TestFlight distribution, App Store Connect submissions, Google Play releases, versioning, and compliance issues.

Third-Party Integrations

Integrate SDKs for ticketing, wallet/loyalty, payments, analytics, and real-time data feeds while isolating complexity behind clean interfaces.

API Contracts

Partner proactively with backend engineering teams to define API contracts and ensure reliable communication between systems.

Code Quality & Mentorship

Establish and enforce engineering standards around linting, testing strategy, architecture, and PR reviews while mentoring junior and mid-level developers.

Performance & Reliability

Profile and resolve UI and performance issues related to real-time features such as live scores, loyalty programs, and in-venue commerce. Design applications for graceful degradation and reliability in challenging environments , including inconsistent venue Wi-Fi.

Product & Client Fluency

Identify technical risks during sprint planning and comfortably explain technical decisions directly to clients. Help shape the structure and technical direction of a growing front-end engineering team .

What You Bring

7+ years of professional mobile development experience. 3+ years building production Flutter applications. Flutter is a MUST.

Deep knowledge of Flutter/Dart , mobile architecture, and scalable application development. Proven experience architecting applications that support multiple clients, tenants, or brands from a single shared codebase . Deep familiarity with Apple App Store and Google Play Store release processes .

Experience managing multiple concurrent application builds and releases. Production experience integrating third-party SDKs , including payments, ticketing, analytics, or similar technologies. Strong understanding of Flutter performance profiling and optimization .

Experience designing scalable front-end architectures using reusable components, feature flags, theming, and configuration-driven development. A track record of mentoring engineers and establishing technical standards for a development team. Comfortable managing multiple concurrent projects and shifting priorities .

Experience working in a fast-paced startup or high-growth environment with significant scale requirements. Excellent communication skills and the ability to communicate technical concepts clearly to both technical and non-technical audiences. Passionate about technology, product development, and building exceptional consumer experiences.

Willing and able to work onsite 5 days per week . Nice to Have React experience . Experience within sports, ticketing, or live-event technology .

Familiarity with loyalty programs, digital wallets, or POS integrations . Experience building applications with real-time data and live-event functionality . Experience with automated Flutter testing frameworks such as Patrol .

Ideal Candidate You are a senior, hands-on Flutter engineer who thinks beyond individual tickets and features . You understand how to architect a mobile platform that can support multiple clients and applications at scale, and you're comfortable owning everything from architecture and code quality to app-store releases and performance.

You thrive in a startup environment where priorities move quickly and you can have a meaningful impact. You are equally comfortable writing code, mentoring developers, making architectural decisions, and communicating directly with clients and leadership . Most importantly, you're passionate about building great products and excited to help shape both the technology and the front-end engineering team as the company scales.