Mobile Application Developer

We're seeking a contract Mobile Application Developer to design, build, and maintain secure, high-performance mobile apps and related web services for a Federal client. You'll use Flutter / Dart for cross-platform mobile, Angular for web UI, and ASP.NET Core Web API with Dependency Injection and Entity Framework Core for backend services.

Key Responsibilities

• Build and ship cross-platform Flutter / Dart mobile applications with robust state management, offline sync, and accessibility best practices.
• Develop modular, responsive Angular components and pages; integrate with design systems and REST APIs.
• Design and implement ASP.NET Core Web APIs using DI and Entity Framework Core; write maintainable data models, migrations, and queries.
• Apply secure coding practices aligned to Security+ principles and OWASP guidance; implement authentication / authorization and input validation.
• Automate builds, testing, and deployments (CI / CD); monitor performance and reliability; troubleshoot across the stack.
• Collaborate with product, UX, security, and DevOps; participate in Agile ceremonies, code reviews, and release planning.
• Create clear technical documentation and contribute to engineering standards.

Must-Have Qualifications

• Flutter with Dart
• Angular (TypeScript) for front-end development.
• .NET (ASP.NET Core Web API) with Dependency Injection and Entity Framework Core.
• CompTIA Security+ (CE) certification or ability to obtain within 30 days of hire, and eligibility to obtain / maintain a secret clearance. This role requires the ability to obtain and maintain a U.S. government security clearance (which typically requires U.S. citizenship)
• Experience designing and consuming RESTful APIs; JSON / HTTP fundamentals.
• Proficiency with Git-based workflows, code reviews, unit / integration testing, and Agile delivery.
• Strong communication and collaboration skills.

Nice-to-Have (Preferred)

• Microsoft SQL Server experience and proficiency with SQL Server Management Studio (SSMS) for administration, profiling, and query tuning.
• Experience with application telemetry / monitoring, performance optimization, and incident response.