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Here are six sample cover letters for subpositions related to "languages-and-frameworks," with the requested information filled out.

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**Sample 1**

- **Position number:** 1
- **Position title:** Frontend Developer
- **Position slug:** frontend-developer
- **Name:** Jane
- **Surname:** Doe
- **Birthdate:** January 15, 1990
- **List of 5 companies:** Apple, Google, Microsoft, IBM, Amazon
- **Key competencies:** Proficient in HTML, CSS, JavaScript, React, Angular

**Cover Letter:**

Dear Hiring Manager,

I am writing to express my interest in the Frontend Developer position at your esteemed organization. With a solid background in web technologies and frameworks, I am confident in my ability to contribute effectively to your team.

During my time at Google, I honed my skills in frameworks such as React and Angular. My projects have included building responsive, user-centric applications that prioritize performance and accessibility. I am passionate about creating seamless user experiences and continually learning new technologies to keep up with industry trends.

I am excited about the opportunity to bring my expertise to your organization and help develop cutting-edge applications. Thank you for considering my application.

Sincerely,
Jane Doe

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**Sample 2**

- **Position number:** 2
- **Position title:** Backend Developer
- **Position slug:** backend-developer
- **Name:** John
- **Surname:** Smith
- **Birthdate:** March 22, 1985
- **List of 5 companies:** IBM, Amazon, Dell, Facebook, Adobe
- **Key competencies:** Skilled in Node.js, Python, Java, RESTful APIs, and database management

**Cover Letter:**

Dear [Hiring Manager's Name],

I am excited to apply for the Backend Developer position at [Company Name]. With over 8 years of experience in server-side programming and API development, I have a strong foundation in technologies such as Node.js, Python, and Java.

At Amazon, I successfully designed and implemented scalable RESTful APIs that improved the application’s performance. My experience with various database management systems allows me to ensure data integrity and efficient query execution.

I look forward to the opportunity to contribute my skills to [Company Name] and help create robust backend solutions to enhance your applications.

Thank you for your consideration.

Best regards,
John Smith

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**Sample 3**

- **Position number:** 3
- **Position title:** Software Engineer
- **Position slug:** software-engineer
- **Name:** Mary
- **Surname:** Johnson
- **Birthdate:** July 30, 1992
- **List of 5 companies:** Google, Microsoft, Oracle, Salesforce, Spotify
- **Key competencies:** Proficient in C#, .NET Framework, ASP.NET, and MVC

**Cover Letter:**

Dear [Hiring Manager's Name],

I wish to express my interest in the Software Engineer position at [Company Name]. With extensive knowledge of C# and the .NET framework, I am adept at developing high-performance applications that meet client specifications.

In my previous role at Microsoft, I played a vital part in numerous projects utilizing ASP.NET and MVC architecture, ensuring timely delivery while maintaining high quality. I take pride in collaborating effectively with cross-functional teams to tackle complex problems and design innovative solutions.

I am eager to bring my technical skills and passion for software development to [Company Name]. Thank you for considering my application.

Sincerely,
Mary Johnson

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**Sample 4**

- **Position number:** 4
- **Position title:** Full Stack Developer
- **Position slug:** full-stack-developer
- **Name:** Robert
- **Surname:** Brown
- **Birthdate:** October 10, 1988
- **List of 5 companies:** Facebook, Twitter, Uber, GitHub, Airbnb
- **Key competencies:** Expertise in JavaScript, Node.js, Vue.js, MySQL, and MongoDB

**Cover Letter:**

Dear [Hiring Manager's Name],

I am excited to apply for the Full Stack Developer position at [Company Name]. My diverse skill set in both frontend and backend technologies allows me to develop comprehensive solutions that enhance user engagement and drive business results.

At Facebook, I contributed to the development of critical components for various applications, utilizing JavaScript-based frameworks and databases like MySQL and MongoDB. My hands-on approach and problem-solving skills empower me to handle the complexities of full-stack development seamlessly.

I would love the opportunity to leverage my skills and contribute to the innovative projects at [Company Name]. Thank you for your time and consideration.

Best regards,
Robert Brown

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**Sample 5**

- **Position number:** 5
- **Position title:** Mobile App Developer
- **Position slug:** mobile-app-developer
- **Name:** Emily
- **Surname:** Wilson
- **Birthdate:** February 14, 1993
- **List of 5 companies:** Apple, Samsung, Nokia, Adobe, LinkedIn
- **Key competencies:** Skilled in Swift, Kotlin, React Native, and mobile UI/UX design

**Cover Letter:**

Dear [Hiring Manager's Name],

I am writing to express my interest in the Mobile App Developer position at [Company Name]. Having developed several successful applications for both iOS and Android platforms, I am adept at using Swift, Kotlin, and React Native to create cutting-edge mobile experiences.

My recent project at Apple included leading a team to develop a highly-rated mobile application, focusing on user-centered design and performance optimization. This experience has instilled in me the importance of blending functionality with aesthetic appeal.

I look forward to the possibility of contributing my skills to [Company Name] and helping to create standout mobile solutions. Thank you for your consideration.

Sincerely,
Emily Wilson

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**Sample 6**

- **Position number:** 6
- **Position title:** Data Scientist
- **Position slug:** data-scientist
- **Name:** Michael
- **Surname:** Lee
- **Birthdate:** April 5, 1987
- **List of 5 companies:** Amazon, Google, Oracle, IBM, Netflix
- **Key competencies:** Proficient in Python, R, SQL, TensorFlow, and data visualization

**Cover Letter:**

Dear [Hiring Manager's Name],

I am excited to apply for the Data Scientist position at [Company Name]. With a strong analytical background and expertise in machine learning algorithms, I have a proven track record of transforming data into actionable insights.

At Google, I utilized Python and SQL to analyze complex datasets, leading to actionable business strategies that enhanced the user experience. My experience with TensorFlow allows me to implement advanced machine learning models efficiently.

I am passionate about leveraging data science to drive innovation at [Company Name]. Thank you for considering my application.

Best regards,
Michael Lee

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Feel free to customize these samples further to align with specific job requirements or personal experiences.