To hire dedicated mobile app developers, you can follow these professional steps:

1. Define your project requirements: Clearly outline your project goals, features, and timeline to ensure you attract developers with the right skill set.

2. Research reputable platforms: Explore reputable platforms such as Upwork, Toptal, or LinkedIn to find experienced mobile app developers.

3. Review portfolios and profiles: Evaluate developers' portfolios and profiles to assess their previous work, expertise, and client feedback.

4. Conduct interviews: Schedule interviews with potential candidates to discuss their experience, approach to development, and compatibility with your project.

5. Check references: Reach out to previous clients or employers to verify the developers' professionalism, communication skills, and ability to meet deadlines.

6. Clarify terms and expectations: Clearly define the terms of engagement, including project scope, payment structure, communication channels, and project milestones.

7. Sign a contract: Draft a comprehensive contract outlining the project scope, deliverables, timelines, payment terms, and confidentiality agreements.

8. Maintain communication: Regularly communicate with the hired developers to provide feedback, address concerns, and ensure alignment with project objectives.