evanwelohr77
Full Stack Engineer
Full Stack Engineer with over 10 years of experience leading cross-functional teams in building scalable web applications and backend infrastructures. Proven expertise in Node.js, Solidity, React.js, Vue.js, PHP, and Python. Spearheaded projects accommodating over 5 million daily transactions, optimized server response times by up to 30%, and improved user retention by 30% through real-time functionality enhancements. Focused on leveraging cutting-edge technologies to drive measurable improvements in performance, security, and user satisfaction.
Experience: 10 years
Yearly salary: $100,000
Hourly rate: $70
Nationality: 🇺🇸 United States
Residency: 🇺🇸 United States
Experience
Back End | Smart Contract Engineer
Decent Reviews 2023 - 2023
• Created a user review API and an automated review aggregation engine using Node.js, TypeScript, and Express.js, streamlining data collection processes and boosting efficiency by 50% for the customer support team. • Developed a badge generation engine, driving a 25% increase in user-generated content shared on social media, which helped brand visibility and engagement. • Orchestrated a custom reporting dashboard leveraging MongoDB aggregation to visualize review trends, yielding actionable insights that improved product features and raised customer satisfaction by 15%. • Integrated smart contracts via Web3.js, automating contract execution and reducing manual intervention by 60%, leading to greater operational efficiency. • Set up CI/CD pipelines using GitHub Actions, achieving a 60% reduction in deployment errors and enhancing overall software reliability. • Produced detailed API documentation with Swagger and conducted thorough API testing using Cypress and Jest, improving developer onboarding by 40% and increasing system uptime by 15%. • Executed a strategic initiative to enhance server performance using Docker; reduced average database query execution times to under 200 milliseconds, leading to improved user experience and application responsiveness.
Senior Full Stack Engineer
Cadence13 2021 - 2023
• Led the design and development of 15 web pages using HTML5, CSS3, and JavaScript, resulting in a 40% increase in page load speed and a 25% improvement in user satisfaction through better navigation. • Implemented Redux middleware for data flow and state management, reducing loading times by 30% and ensuring smooth user experiences during high-traffic periods. • Crafted modular REST APIs using Node.js and Express.js, streamlining IoT application integrations and improving developer productivity by 35%. • Built reusable UI components with React.js and Vue.js, reducing development time by 40% and enhancing code maintainability across the projects. • Executed comprehensive testing plans, including unit and end-to-end tests, achieving a 100% pass rate on critical features and boosting product reliability. • Optimized DNS configurations in AWS, resulting in a 30% increase in resolution speeds, enhancing user satisfaction and reducing complaint rates. • Streamlined project management with JIRA and GitHub, cutting project delivery time by 25% and improving collaboration among 15 team members.
Full Stack Developer
ISsoft 2017 - 2020
• Enhanced backend services with Node.js and Express.js, reducing server response time by 30%, improving user experience, and increasing retention among core users. • Configured a comprehensive load-balancing strategy with NGINX, optimizing routing for two Node.js applications, cutting response times by 40% and ensuring service continuity during high-traffic periods. • Integrated OmniAuth for seamless user access, decreasing login errors by 25% and increasing user retention by 15% over six months. • Managed AWS resource allocation, reducing operating costs by 20% through effective instance scaling and workload-based instance selection.
Full Stack Developer
PanonIT 2016 - 2017
• Created a robust educational platform using React/Next.js and Vue.js, boosting user engagement by 40% and optimizing performance to reduce load times from 5 seconds to under 2 seconds. • Built advanced data visualizations with D3.js, simplifying complex data for non-technical users and reducing support queries by 20%. • Performed in-depth code reviews focused on TDD principles, improving code quality and reducing debugging time by 50%. • Implemented backend API integrations with Nest.js and PostgreSQL, automating data synchronization and saving the team 15 hours per week. • Optimized CI/CD pipelines using Jenkins for seamless SPA deployment on AWS S3, streamlining future development strategies.
Skills
java
nextjs
node
php
python
react
solidity
web3js
english