Here’s a professional job posting tailored to your request:
We are seeking an experienced and independent Social Media Manager and Marketer (no agencies, please) to help promote our newly launched mobile app across LinkedIn, Facebook, Instagram, and Twitter. The ideal candidate will be a skilled freelancer with a proven track record in social media marketing and app promotion.
Key Responsibilities:

    Social Media Advertising: Source and assess the best advertising packages from various social media platforms to maximize visibility and downloads.
    Content Creation: Develop original, engaging, and shareable content that can achieve a viral effect on social media networks.
    Platform Management: Manage day-to-day posting schedules, monitor engagement, and respond to comments to build an active and loyal audience.
    Cross-Media Outreach: Leverage relationships with media outlets, such as TV networks, newspapers, YouTube influencers, and bloggers, to amplify promotional efforts.
    Performance Analysis: Track and analyze campaign performance metrics, providing actionable insights for improvement.

Requirements:

    Proven experience in social media management and marketing, particularly for app launches or digital products.
    Strong ability to identify and negotiate the best ad placements on social media platforms.
    Exceptional skills in content generation with a focus on driving engagement and downloads.
    Established relationships with external media outlets and influencers are a major advantage.
    Self-starter with excellent communication skills and a collaborative approach to client relationships.

Why Work With Us?

    Exciting opportunity to contribute to the success of an innovative mobile app.
    Flexibility to work independently and apply creative strategies.
    Competitive compensation based on results and experience.

If you are a creative, results-driven social media expert ready to help take our app to the next level, we’d love to hear from you! Please share your portfolio, examples of past campaigns, and any relevant media connections you bring to the table.

Let me know if you'd like to refine or add details!