Full-stack Developer Cover Letter Examples & Writing Guide

Dear Hiring Manager, I am writing to express my strong interest in the Senior Full-stack Developer position at Airbnb. With 7 years of experience building scalable web applications and expertise in React and Node.js, I am excited to contribute to the platform connecting millions of hosts and guests worldwide. In my current role as Lead Full-stack Engineer at Uber, I have successfully: • Built end-to-end features using React, TypeScript, and Node.js serving 10M+ daily active users • Designed RESTful and GraphQL APIs handling 100K+ requests per second • Implemented real-time features using WebSockets and Server-Sent Events • Optimized application performance reducing page load time by 60% • Built CI/CD pipelines enabling 50+ deployments per day with automated testing • Mentored 8 junior developers in full-stack best practices and code review Airbnb's mission to create a world where anyone can belong anywhere inspires me. I am particularly excited about working on marketplace features and host/guest experiences. I would welcome the opportunity to discuss how my full-stack expertise can contribute to Airbnb's platform. Sincerely, Michael Chen

Dear Hiring Team, I am excited to apply for the Full-stack Developer position at Stripe. With 6 years of experience building financial applications and expertise in the MERN stack, I am eager to help increase the GDP of the internet. At Square, I have delivered full-stack solutions including: • Developed payment processing dashboard using React, Redux, and Material-UI • Built backend services using Node.js, Express, and MongoDB handling millions of transactions • Implemented secure authentication using OAuth 2.0 and JWT tokens • Designed database schemas optimizing for read-heavy workloads • Created real-time analytics dashboards using Socket.io and D3.js • Ensured PCI DSS compliance through security best practices and code audits Stripe's mission to increase economic opportunity and focus on developer experience deeply resonate with me. I am particularly excited about working on Stripe's dashboard and API platform. I look forward to discussing how my fintech full-stack expertise can contribute to Stripe's growth. Best regards, Jennifer Park

Dear Hiring Manager, I am thrilled to apply for the Full-stack Developer position on Netflix's UI Platform team. With 6 years of experience building responsive web applications, I am excited to help deliver exceptional streaming experiences to 200M+ subscribers. In my role as Senior Full-stack Engineer at Spotify, I have: • Built music player interface using React, Next.js, and TypeScript • Implemented server-side rendering (SSR) for SEO optimization and performance • Designed microservices architecture using Node.js and gRPC • Created responsive UI components supporting desktop, mobile, and tablet devices • Implemented A/B testing framework for feature experimentation • Optimized bundle size reducing JavaScript payload by 40% using code splitting Netflix's culture of innovation and commitment to customer experience inspire me. I am particularly excited about working on Netflix's web player and personalization features. I would welcome the opportunity to discuss how my UI engineering expertise can enhance Netflix's platform. Sincerely, David Rodriguez

Dear Hiring Team, I am writing to apply for the Full-stack Developer position at Shopify. With 5 years of experience building e-commerce applications and expertise in Ruby on Rails and React, I am eager to help merchants succeed. At BigCommerce, I have built commerce features including: • Developed product catalog and inventory management using Rails and PostgreSQL • Built checkout flow and payment integration using React and Stripe API • Implemented order fulfillment workflow with real-time tracking updates • Designed multi-tenant architecture supporting thousands of merchants • Created analytics dashboard showing sales metrics and customer insights • Optimized database queries reducing checkout latency by 50% Shopify's mission to make commerce better for everyone and commitment to merchant success inspire me. I am particularly excited about working on Shopify's core commerce platform. I look forward to discussing how my e-commerce full-stack expertise can help Shopify merchants grow. Best regards, Sarah Williams

Dear Hiring Manager, I am excited to apply for the Full-stack Developer position on GitHub's Collaboration Tools team. With 6 years of experience building developer tools and passion for open source, I am eager to help developers build software together. At GitLab, I have developed collaboration features including: • Built code review interface using Vue.js and Ruby on Rails • Implemented real-time collaboration features using WebSockets and Redis • Designed PR (Pull Request) workflow with inline comments and suggestions • Created CI/CD integration dashboard showing build status and deployment metrics • Built REST and GraphQL APIs for third-party integrations • Optimized Git operations handling repositories with 100K+ commits GitHub's mission to build the home for all developers and commitment to open source deeply resonate with me. I am particularly excited about working on GitHub's code collaboration features. I would welcome the opportunity to discuss how my developer tools expertise can contribute to GitHub's platform. Sincerely, Kevin Martinez

Dear Hiring Team, I am writing to express my interest in the Full-stack Developer position at Slack. With 5 years of experience building real-time applications, I am excited to help teams communicate and collaborate effectively. At Discord, I have built messaging features including: • Developed chat interface using React and WebSockets for real-time messaging • Implemented message search and indexing using Elasticsearch • Built file sharing and preview functionality supporting multiple formats • Designed notification system with push notifications and email digests • Created threading and reactions features enhancing conversation organization • Optimized message delivery achieving sub-100ms latency Slack's mission to make work life simpler and commitment to user experience inspire me. I am particularly excited about working on Slack's core messaging and collaboration features. I look forward to discussing how my real-time application expertise can enhance Slack's platform. Best regards, Lisa Thompson

Dear Hiring Manager, I am excited to apply for the Entry-Level Full-stack Developer position at HubSpot. As a recent graduate with a B.S. in Computer Science from MIT and internship experience building web applications, I am eager to start my career helping businesses grow. During my internship at Salesforce and personal projects, I have: • Built web applications using React, Node.js, and Express with PostgreSQL • Developed RESTful APIs with authentication and authorization using JWT • Implemented responsive UI components using Tailwind CSS and Material-UI • Created full-stack e-commerce application with shopping cart and payment integration • Built CI/CD pipelines using GitHub Actions and deployed to AWS • Learned agile development methodologies including Scrum and sprint planning My academic coursework included web development, databases, software engineering, and cloud computing. I am passionate about building user-friendly applications that solve real problems. HubSpot's mission to help businesses grow and commitment to developer experience inspire me. I am particularly excited about learning from experienced engineers and contributing to HubSpot's CRM platform. I would welcome the opportunity to discuss how my full-stack skills and enthusiasm can contribute to HubSpot's engineering team. Sincerely, Alex Johnson