Available to hire
I am Lincoln Lewin Sr., a Senior Full Stack Engineer with 10+ years of experience building scalable front-end and back-end solutions using React and Ruby on Rails. I thrive on turning complex requirements into maintainable systems, designing high-performance APIs, and delivering value through collaboration in agile environments.
I have led teams, mentored engineers, and modernized cloud infrastructure with Docker, Kubernetes, and AWS. I enjoy partnering with product and design to create excellent user experiences and measurable business impact.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Language
English
Fluent
Work Experience
Sr. Full stack Engineer at Nifty League
March 1, 2025 - August 18, 2025Led the development of a decentralized gaming platform using React.js, Node.js, and AWS for backend and cloud integration. Designed and implemented GraphQL and REST APIs to manage real-time player interactions and game state data. Enhanced frontend performance, reducing load times by 40% through Webpack and lazy loading. Implemented JWT and OAuth2 authentication methods to boost security. Built scalable backend services and integrated AWS Lambda and S3 for serverless compute and storage. Deployed services on AWS EC2 and RDS ensuring high availability. Mentored junior developers and established best practices, fostering team collaboration and cloud-native cost reductions. Maintained CI/CD pipelines with GitHub Actions and Docker, reducing deployment times by 30%. Integrated scalable DynamoDB for low-latency data storage in high-traffic environments and conducted thorough unit and integration testing with Jest and Mocha.
Lead Full Stack Engineer at Fossil Group
August 1, 2022 - August 18, 2025Led development of a scalable eCommerce platform using React.js, Redux, and TypeScript for frontend and Node.js and Express.js for backend API services. Managed AWS cloud deployment utilizing S3, Lambda, and EC2 for high availability and resource efficiency. Executed CI/CD pipelines automation via GitHub Actions. Spearheaded migration from monolithic architecture to microservices to enhance scalability. Integrated Stripe for payments and WebSocket for real-time order updates. Mentored developers, led code reviews, and collaborated cross-functionally to optimize user experience and system reliability while reducing costs by 20%. Worked closely with product and design teams to tightly integrate user-facing elements with backend logic.
Sr. Full Stack Engineer at Expert Technical Solutions
August 1, 2021 - August 18, 2025Led full-stack development projects using React.js and Node.js to build high-performance enterprise applications. Designed backend services with Express.js and REST APIs and integrated MongoDB and PostgreSQL databases optimizing query efficiency and concurrency. Implemented microservices architecture to improve scalability and system fault tolerance. Built scalable React components working closely with frontend teams. Developed GraphQL APIs which reduced load times by 30%. Managed cloud infrastructure deployment on AWS EC2 and RDS. Automated deployments with Docker and Kubernetes improving system reliability. Ensured secure API access integrating JWT authentication mechanisms. Mentored junior engineers in development best practices and technologies.
Sr. Full stack Engineer at Nifty League
March 1, 2025 - August 24, 2025Led the development of a decentralized gaming platform remotely with React.js, Node.js, and AWS for backend and cloud integration. Designed and implemented GraphQL APIs for real-time player interaction and game state. Improved web app UX by 30% using HTML5, CSS3, SASS, LESS, Bootstrap, and React. Developed REST APIs with Node.js, Express.js, PostgreSQL, and React.js. Built scalable backend services integrated with AWS Lambda and S3. Optimized frontend performance by reducing load times by 40%, implemented JWT authentication, and Redux for state management. Deployed services on AWS EC2 and RDS ensuring high availability. Mentored junior developers, led code reviews, and reduced cloud costs by 20%. Integrated DynamoDB for high-traffic data storage. Created CI/CD pipelines with GitHub Actions and Docker, reducing deployment time by 30%.
Lead Full Stack Engineer at Fossil Group
August 1, 2022 - August 24, 2025Led development of a scalable ecommerce platform using React.js, Redux, TypeScript, and Node.js. Developed backend APIs for inventory, customer profiles, and order processing with Express.js. Used AWS S3, Lambda, and EC2 for deployment ensuring high availability. Implemented CI/CD pipelines with GitHub Actions. Led migration initiatives to microservices architecture to improve scalability. Integrated Stripe payment processing and WebSocket for real-time order updates. Mentored developers, collaborated cross-functionally, and conducted code reviews to maintain clean, scalable code.
Sr. Full Stack Engineer at Expert Technical Solutions
August 1, 2021 - August 24, 2025Led full-stack development with React.js and Node.js for enterprise applications. Designed backend services with Express.js and REST APIs integrated with frontend. Optimized databases with MongoDB and PostgreSQL. Implemented microservices architecture for fault tolerance and scalability. Developed GraphQL APIs reducing load times by 30%. Managed AWS cloud infrastructure using EC2 and RDS. Automated deployments using Docker and Kubernetes. Mentored junior engineers and ensured secure backend services using JWT authentication.
Senior Full Stack Engineer at Nifty League
March 1, 2025 - September 29, 2025Led development of a decentralized gaming platform using React.js, Node.js, and AWS for backend and cloud integration. Designed and implemented GraphQL APIs for real-time player interactions and game state data. Built and tested web application with HTML5, CSS3, SASS/LESS, Bootstrap, and React, achieving a 30% UX improvement and faster interface responsiveness. Developed REST APIs with Node.js, Express.js, PostgreSQL, and React.js; built scalable backend services with Node.js and AWS Lambda and S3. Implemented JWT authentication and OAuth2, used Redux for state management, and deployed on AWS EC2/RDS with disaster recovery. Mentored junior developers, led code reviews, and fostered best practices, reducing costs by 20% through cloud-native solutions. Integrated DynamoDB for low-latency storage and conducted unit/integration testing with Jest and Mocha. Created CI/CD pipelines with GitHub Actions and Docker, reducing deployment time by 30%. Improved React Observables via Redux, boosting
Lead Full Stack Engineer at Fossil Group
August 1, 2022 - September 29, 2025Led development of a scalable eCommerce platform using React.js, Redux, and TypeScript on the frontend and Node.js on the backend. Built and maintained backend APIs for inventory, customer profiles, and orders with Express.js. Deployed with AWS (S3, Lambda, EC2) to ensure high availability; implemented CI/CD with GitHub Actions. Migrated from monolithic to microservices, improving scalability, and integrated Stripe for payments and WebSocket for real-time updates. Mentored developers, aligned with product/design teams, and reduced costs by 20% through cloud-native improvements.
Senior Full Stack Engineer at Expert Technical Solutions
August 1, 2021 - September 29, 2025Led full-stack development using React.js and Node.js for enterprise-grade applications. Designed and developed backend services with Express.js and REST APIs, integrating them with frontend components. Optimized data storage using MongoDB and PostgreSQL, enabling high concurrency. Implemented microservices architecture for scalability and fault tolerance, collaborated with frontend teams to build scalable React components, and developed GraphQL APIs for efficient data retrieval, reducing load times by ~30%. Mentored junior engineers and managed cloud deployments on AWS (EC2, RDS), with Docker and Kubernetes automation to improve reliability.
Sr. Full Stack Engineer at Nifty League
March 1, 2025 - September 29, 2025Led the development of a decentralized gaming platform using React.js, Node.js, and AWS for backend and cloud integration. Designed GraphQL APIs to manage real-time player interactions and game state data. Built the web application with HTML5, CSS3, SASS/LESS and React, achieving a 30% improvement in UX and interface responsiveness. Created REST APIs with Node.js/Express and PostgreSQL, and built scalable backend services with AWS Lambda and S3. Improved frontend performance by 40% through Webpack and lazy loading. Implemented JWT authentication and Redux for efficient state management across web and mobile platforms. Deployed services on AWS EC2/RDS with disaster recovery. Mentored junior developers and collaborated with cross-functional teams to reduce costs by 20%.
Lead Full Stack Engineer at Fossil Group
August 1, 2022 - September 29, 2025Led development of a scalable eCommerce platform using React.js, Redux, and TypeScript for frontend and Node.js/Express for backend services. Developed and maintained backend APIs for inventory management, customer profiles, and order processing. Worked with AWS services (S3, Lambda, EC2) for cloud deployment, ensuring high availability. Implemented CI/CD pipelines with GitHub Actions; migrated from monolithic to microservices architecture. Integrated Stripe for payments and WebSocket for real-time order updates. Mentored developers and collaborated with product/design teams to ensure seamless integration of frontend and backend logic, achieving a 20% cost reduction.
Sr. Full Stack Engineer at Expert Technical Solutions
August 1, 2021 - September 29, 2025Led full-stack development using React.js and Node.js, delivering high-performance applications for enterprise clients. Designed backend services with Express.js and REST APIs, integrating them with frontend components. Optimized data storage with MongoDB and PostgreSQL for efficient queries and high concurrency. Implemented microservices architecture to improve scalability and fault tolerance. Collaborated with frontend teams to build scalable React components and ensured seamless integration with backend services. Developed GraphQL APIs for efficient data retrieval, reducing load times by 30%. Mentored junior engineers and managed AWS deployments on EC2 with RDS. Automated deployments using Docker and Kubernetes, improving reliability and reducing manual intervention. Implemented JWT authentication for secure API access.
Sr. Full Stack Engineer at Nifty League
March 1, 2025 - September 29, 2025Led the development of a decentralized gaming platform using React.js, Node.js, and AWS for backend and cloud integration. Designed and implemented GraphQL APIs for real-time player interactions and game state data. Built and tested the web application with HTML5, CSS3, SASS/LESS, Bootstrap, and React, achieving a 30% improvement in UX and interface responsiveness. Developed REST APIs with Node.js/Express.js and PostgreSQL, built scalable backend services with Node.js and AWS Lambda for serverless compute and S3 storage. Optimized frontend performance with Webpack and lazy loading, implemented JWT for API security, and used Redux for efficient state management across web and mobile platforms. Deployed services on AWS with EC2 and RDS, mentored junior developers, and fostered best practices. Collaborated across teams to implement cloud-native solutions, reducing costs by 20%. Integrated DynamoDB for scalable data storage and conducted unit/integration tests with Jest and Mocha. Created
Lead Full Stack Engineer at Fossil Group
August 1, 2022 - September 29, 2025Led the development of a scalable eCommerce platform using React.js, Redux, and TypeScript for frontend and Node.js for backend services. Built and maintained backend APIs supporting inventory management, customer profiles, and order processing with Express.js. Deployed on AWS (S3, Lambda, EC2) to ensure high availability and resource efficiency. Implemented CI/CD pipelines with GitHub Actions and led migration from monolithic architecture to microservices. Integrated Stripe for payments and WebSocket for real-time order updates. Mentored developers and collaborated cross-functionally to implement cloud-native solutions, reducing costs by 20%. Ensured seamless integration of front-end elements with backend logic and conducted code reviews for maintainability.
Sr. Full Stack Engineer at Expert Technical Solutions
August 1, 2021 - September 29, 2025Led full-stack development using React.js and Node.js, building high-performance applications for enterprise clients. Designed backend services with Express.js and REST APIs, integrated with front-end components. Optimized data storage with MongoDB and PostgreSQL for efficient querying and concurrency. Implemented microservices architecture to improve scalability and fault tolerance. Collaborated with frontend teams to build scalable React components, developed GraphQL APIs to reduce load times, and mentored junior engineers. Managed cloud infrastructure on AWS (EC2, RDS) and automated deployments using Docker and Kubernetes to improve reliability. Implemented secure API access with JWT authentication.
Sr. Full Stack Engineer at Nifty League
March 1, 2025 - September 29, 2025Led the development of a decentralized gaming platform using React.js, Node.js, and AWS for backend and cloud integration. Designed GraphQL APIs for real-time player interactions and game state. Built a responsive web UI with HTML5, CSS3, SASS/LESS, Bootstrap, and React. Developed REST APIs with Node.js/Express and PostgreSQL. Built scalable backend services with Node.js and AWS Lambda, and S3 storage. Reduced frontend load times by 40% via Webpack and lazy loading. Implemented JWT authentication and Redux for efficient state management. Deployed services to AWS (EC2/RDS) with high availability. Mentored junior engineers and led code reviews. Collaborated across teams to implement cloud-native solutions, reducing costs by 20%. Integrated DynamoDB for low-latency storage and conducted unit/integration tests with Jest and Mocha. Created CI/CD pipelines with GitHub Actions and Docker, reducing deployment time by 30%.
Lead Full Stack Engineer at Fossil Group
August 1, 2022 - September 29, 2025Led development of a scalable eCommerce platform using React.js, Redux, and TypeScript for frontend and Node.js for backend. Developed backend APIs with Express.js to support inventory, profiles, and orders. Deployed on AWS (S3, Lambda, EC2) and implemented CI/CD pipelines with GitHub Actions. Led migration from monolith to microservices to improve scalability. Integrated Stripe for payments and WebSocket for real-time updates. Mentored engineers and collaborated with product and design teams to ensure seamless integration; achieved ~20% cost reductions.
Sr. Full Stack Engineer at Expert Technical Solutions
August 1, 2021 - September 29, 2025Led full-stack development using React.js and Node.js, building high-performance applications for enterprise clients. Designed Express REST APIs, and optimized data storage with MongoDB and PostgreSQL. Implemented microservices architecture and GraphQL for efficient data retrieval. Mentored junior engineers and managed deployments on AWS (EC2, RDS). Automated deployments with Docker and Kubernetes, improving system reliability. Secured backend services with JWT authentication.
Sr. Full stack Engineer at Nifty League
March 1, 2025 - September 29, 2025Led the development of scalable web applications using React.js and Ruby on Rails, designed RESTful APIs and GraphQL for data fetching, optimized queries in PostgreSQL and Redis to improve performance, implemented automated CI/CD pipelines with GitHub Actions, and mentored junior developers to improve code quality and collaboration.
Lead Full Stack Engineer at Fossil Group
August 1, 2022 - September 29, 2025Developed backend services with Ruby on Rails to support product catalog, authentication, and order management; built REST APIs and integrated with React frontend; led migration from monolithic architecture to microservices, improving scalability and resilience; mentored a team of engineers and introduced TDD practices to improve code quality.
Sr. Full Stack Engineer at Expert Technical Solutions
August 1, 2021 - September 29, 2025Designed and developed Ruby on Rails applications for enterprise clients, focusing on scalability, security, and performance; built RESTful APIs and integrated with React frontend; implemented GraphQL APIs to optimize data fetching; deployed with Docker and Kubernetes and collaborated with DevOps for reliable environments.
Education
Bachelor of Science at Georgia State University
September 1, 2015 - April 1, 2019Bachelor of Science at Georgia State University
September 1, 2015 - April 1, 2019Bachelor of Science at Georgia State University
September 1, 2015 - April 1, 2019Bachelor of Science at GEORGIA STATE UNIVERSITY
September 1, 2015 - April 1, 2019Bachelor of Science at Georgia State University
September 1, 2015 - April 1, 2019Bachelor of Science at Georgia State University
September 1, 2015 - April 1, 2019Bachelor of Science at GEORGIA STATE UNIVERSITY
September 1, 2015 - April 1, 2019Qualifications
React Certification
January 11, 2030 - August 18, 2025Node.js Certification
January 11, 2030 - August 18, 2025JavaScript Certification
January 11, 2030 - August 18, 2025AWS Certification
January 11, 2030 - August 18, 2025Advanced SQL Certification
January 11, 2030 - August 18, 2025React Certification
January 11, 2030 - August 24, 2025Node.js Certification
January 11, 2030 - August 24, 2025JavaScript Certification
January 11, 2030 - August 24, 2025AWS Certification
January 11, 2030 - August 24, 2025SQL (Advanced) Certification
January 11, 2030 - August 24, 2025React Certification
January 11, 2030 - September 29, 2025Node.js Certification
January 11, 2030 - September 29, 2025JavaScript Certification
January 11, 2030 - September 29, 2025AWS Certification
January 11, 2030 - September 29, 2025SQL (Advanced) Certification
January 11, 2030 - September 29, 2025React
January 11, 2030 - September 29, 2025Node.js
January 11, 2030 - September 29, 2025JavaScript
January 11, 2030 - September 29, 2025AWS
January 11, 2030 - September 29, 2025SQL(Advanced)
January 11, 2030 - September 29, 2025React Certification
January 11, 2030 - September 29, 2025Node.js Certification
January 11, 2030 - September 29, 2025JavaScript Certification
January 11, 2030 - September 29, 2025AWS Certification
January 11, 2030 - September 29, 2025SQL (Advanced) Certification
January 11, 2030 - September 29, 2025React
January 11, 2030 - September 29, 2025Node.js
January 11, 2030 - September 29, 2025JavaScript
January 11, 2030 - September 29, 2025AWS
January 11, 2030 - September 29, 2025SQL (Advanced)
January 11, 2030 - September 29, 2025Ruby on Rails
January 11, 2030 - September 29, 2025React
January 11, 2030 - September 29, 2025Node.js
January 11, 2030 - September 29, 2025JavaScript
January 11, 2030 - September 29, 2025AWS
January 11, 2030 - September 29, 2025SQL (Advanced)
January 11, 2030 - September 29, 2025Industry Experience
Software & Internet, Gaming, Financial Services, Retail, Professional Services, Healthcare
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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