Web Developer Front End
Resume:
Jonny Steven Perdomo
Senior Web Developer
San Francisco, CA
https://www.linkedin.com/in/jonny-perdomo-466aaa335 Dynamic and results-driven Senior Web Developer with over 8 years of experience in creating user-centric interfaces and optimizing web applications for performance and accessibility, including a proven ability to increase user engagement by 3.5 times and acquire 2 million new users through effective server-side rendering with Next.js. Proficient in using advanced techniques such as GraphQL, code-splitting, and cloud technologies to enhance scalability, reduce server load by 70%, and ensure high-quality deliverables while mentoring junior developers and fostering cross-functional collaboration. WORK EXPERIENCE
Front End Developer at Leanware
10/2015 - 05/2017 Bogota, CO
● Designed a User-Centric interface through engaging in user research such as user testing and user interviews, and implemented clear Navigation so that both beginners and experienced traders can effectively manage and execute trades, thereby increasing the number of users by 3.5 times.
● Acquired 2 millions new users from SEO-friendly Websites through implementing SSR with Next.js on the front end.
● Decreased Website loading time by 33% by Optimizing JavaScript and CSS Loading with code-splitting, deferring non-essential scripts and Optimizing JavaScript and CSS file size with a bundler using webpack.
● Increased Website response time by 2.7 times from becoming flexible with reducing request numbers and communication amount with using caching and virtual scrolling.
Full Stack Web Developer at Codexco Technologies
08/2017 - 11/2019 Bogota, CO
● Improved efficiency to 98% about complex data requirements with GraphQL for communication between frontend and backend.
● Contributed to a more user-friendly Website from achieving Effective Error Handling using JSON Schema.
● Reduced client complexity, minimized data over-fetching using a Backend-for-Frontend(BFF) layer, Optimized performance and got faster loading time by 43%.
● Helped solve the problems between them to communicate with backend developers and frontend developers.
Junior Web Developer at Protonshub Technologies
03/2020 - 12/2021 Mountain View, CA
● Decreased server load by 70% with load balancer using a combination of Nginx and AWS ELB.
● Achieved Scalability with both Amazon DocumentDB and Amazon ElasticSearch to manage databases.
● Experienced DevOps with Jenkins to volunteer because DevOps Engineer resigned, maintained DevOps by strengthening teamwork and providing close cooperation and assistance with team members, deployed Project on-time.
● Developed responsible front end using React and TailwindCSS, saved 2 weeks of deployment time to teamwork, reduced returning time by 80% using caching.
● Optimized JavaScript and CSS loading using deferring non-essential scripts, loading rest CSS asynchronously and code-splitting to increase Test performance, 95%.
Junior Web Developer at Plego Technologies
02/2022 - 08/2023 Downers Grove, IL
● Implemented keyboard navigation on the frontend with Next.js to improve Accessibility, ensured a user-friendly site.
● Optimized JavaScript and CSS loading, file Size with webpack,, Image loading to load initial time, As a result, improved Website response time, 70%.
● Enhanced User experience using web icon font or SVGs and caching to reduce HTTP Request, Decreased server-load by 14%
Senior Web Developer at MindK
10/2023 - 10/2424 San Francisco, CA
● Developed User-Centric Design and User-friendly site with 4 junior Front end developers using Next.js, TailwindCSS, Cypress.
● Established Effective Error Handling using Test-Driven Development and ensured safety to develop high-quality Front end.
● Supervised and led a communication with the backend development team, solved problems and conflict successfully.
EDUCATION
Jorge Tadeo Lozano University- Bachelors of Computer Science 2011 - 2015 Bogota, CO
SKILLS
AWS, Communication, Teamwork, Problem Solving, DevOps, JavaScript, TypeScript, Node.js, RESTful API, React, Angular, Vue.js, Next.js, Nuxt.js, MySQL, MongoDB, Collaboration, python, Django, WordPress, Jenkins, Web Design UI/UX
LANGUAGE
English, Japanese
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