Certainly! Below are six sample cover letters for subpositions related to "mobile development." I've filled out the specified fields for each position.

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### Sample 1
**Position number:** 1
**Position title:** Mobile App Developer
**Position slug:** mobile-app-developer
**Name:** John
**Surname:** Doe
**Birthdate:** 1990-05-20
**List of 5 companies:** Apple, Google, Microsoft, Samsung, IBM
**Key competencies:** Swift, Kotlin, React Native, UI/UX Design, Agile Development

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**Cover Letter**

John Doe
[Email Address]
[Phone Number]
[Date]
[Company Name]
[Company Address]

Dear Hiring Manager,

I am writing to express my interest in the Mobile App Developer position at [Company Name]. With over five years of experience in mobile app development, specializing in both iOS and Android platforms, I have honed my skills in Swift, Kotlin, and React Native. I am particularly drawn to [Company Name] because of your innovative approach to technology and commitment to user-centric design.

At my previous position with Google, I led a team to successfully launch a mobile application that increased user engagement by 40%. I am adept at Agile methodologies, facilitating sprints and ensuring effective collaboration among stakeholders. My active interest in UI/UX design allows me to create visually appealing and user-friendly applications.

I would love the opportunity to contribute my expertise to your team at [Company Name]. Thank you for considering my application. I look forward to discussing how I can add value to your projects.

Sincerely,
John Doe

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### Sample 2
**Position number:** 2
**Position title:** Mobile UX/UI Designer
**Position slug:** mobile-ux-ui-designer
**Name:** Sarah
**Surname:** Johnson
**Birthdate:** 1988-11-15
**List of 5 companies:** Apple, Facebook, Shopify, Adobe, Spotify
**Key competencies:** Adobe Creative Suite, Figma, User Research, Prototyping, Responsive Design

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**Cover Letter**

Sarah Johnson
[Email Address]
[Phone Number]
[Date]
[Company Name]
[Company Address]

Dear Hiring Manager,

I am eager to apply for the Mobile UX/UI Designer position at [Company Name]. With a solid background in design and a passion for creating intuitive user experiences, I am excited about the opportunity to shape mobile applications that resonate with users.

In my past role at Shopify, I conducted user research and usability testing, providing insights that informed the design of a mobile application used by thousands of clients. My proficiency in tools such as Adobe Creative Suite and Figma enables me to create visually stunning and easy-to-navigate interfaces.

I am particularly impressed by [Company Name]'s commitment to innovation, and I am enthusiastic about the chance to contribute my design skills and user-focused approach to your projects.

Thank you for considering my application. I am looking forward to the possibility of collaborating with the talented team at [Company Name].

Best regards,
Sarah Johnson

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### Sample 3
**Position number:** 3
**Position title:** Mobile Game Developer
**Position slug:** mobile-game-developer
**Name:** Alex
**Surname:** Nguyen
**Birthdate:** 1992-08-30
**List of 5 companies:** Epic Games, Rovio, Supercell, Niantic, Ubisoft
**Key competencies:** Unity, C#, Game Design, 3D Modelling, Version Control

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**Cover Letter**

Alex Nguyen
[Email Address]
[Phone Number]
[Date]
[Company Name]
[Company Address]

Dear Hiring Manager,

I am writing to apply for the Mobile Game Developer position at [Company Name]. With a strong background in game development and a particular expertise in Unity and C#, I am excited about the opportunity to work on engaging mobile games that captivate users.

At Epic Games, I was part of a team that developed a mobile game that topped the app store charts within a month of its release. My skills in 3D modeling and game design allow me to contribute creatively and technically to projects. I thrive in collaborative environments and use version control systems effectively to ensure project integrity.

I am inspired by [Company Name]'s dedication to creating immersive gaming experiences and would be thrilled to be part of your innovative team. Thank you for considering my application.

Sincerely,
Alex Nguyen

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### Sample 4
**Position number:** 4
**Position title:** Android Developer
**Position slug:** android-developer
**Name:** Emily
**Surname:** Smith
**Birthdate:** 1995-03-12
**List of 5 companies:** Google, Huawei, LG, OnePlus, Xiaomi
**Key competencies:** Android SDK, Java, REST APIs, Firebase, Material Design

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**Cover Letter**

Emily Smith
[Email Address]
[Phone Number]
[Date]
[Company Name]
[Company Address]

Dear Hiring Manager,

I am thrilled to apply for the Android Developer position at [Company Name]. As an enthusiastic Android developer with extensive experience using the Android SDK, I welcome the challenge of building robust and intuitive mobile applications for Android users.

During my time at Huawei, I developed several applications that improved user retention by gathering feedback and implementing user-requested features. My proficiency with Java, REST APIs, and Firebase has enabled me to build efficient back-end systems that support mobile applications effectively.

I admire [Company Name] for its innovation and dedication to user experience and would be excited to contribute my skills to your team. I appreciate your consideration of my application and look forward to the possibility of discussing this opportunity further.

Best,
Emily Smith

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### Sample 5
**Position number:** 5
**Position title:** iOS Developer
**Position slug:** ios-developer
**Name:** Michael
**Surname:** Taylor
**Birthdate:** 1991-07-22
**List of 5 companies:** Apple, Uber, Netflix, Etsy, Dropbox
**Key competencies:** Swift, Objective-C, Core Data, Xcode, Agile Development

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**Cover Letter**

Michael Taylor
[Email Address]
[Phone Number]
[Date]
[Company Name]
[Company Address]

Dear Hiring Manager,

I am writing to express my enthusiasm for the iOS Developer position at [Company Name]. With over six years of experience in developing applications for Apple’s ecosystem, I am confident in my ability to create high-quality iOS applications that meet user needs.

At Uber, I played a key role in enhancing user features that directly contributed to a 25% increase in app usage. My expertise in Swift and Objective-C, combined with my knowledge of Core Data and Xcode, enables me to develop seamless applications that perform exceptionally.

I am excited about the innovative work happening at [Company Name] and would love the opportunity to bring my technical skills and passion for iOS development to your team. Thank you for your time and consideration.

Warm regards,
Michael Taylor

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### Sample 6
**Position number:** 6
**Position title:** Mobile Software Engineer
**Position slug:** mobile-software-engineer
**Name:** Jessica
**Surname:** Brown
**Birthdate:** 1989-10-04
**List of 5 companies:** Apple, Amazon, Facebook, Snapchat, Pinterest
**Key competencies:** Flutter, Dart, JavaScript, Git, Cloud Services

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**Cover Letter**

Jessica Brown
[Email Address]
[Phone Number]
[Date]
[Company Name]
[Company Address]

Dear Hiring Manager,

I am excited to submit my application for the Mobile Software Engineer position at [Company Name]. With a background in mobile software engineering and a strong grasp of Flutter and Dart, I am well-equipped to build cross-platform applications that maximize user experience and efficiency.

At Amazon, I contributed to several high-impact projects that enhanced user engagement through innovative application features. My proficiency in JavaScript and experience with cloud services allow me to build scalable and responsive applications that meet user demands.

I admire [Company Name] for its cutting-edge technology solutions and would love to contribute to your mission. Thank you for considering my application, and I look forward to the opportunity to discuss how I can support your team.

Sincerely,
Jessica Brown

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Feel free to modify any details as needed.