Joshua Cohen
Joshua Cohen

Full Stack Web Developer

Actively looking · Member since 3 Jul 2025
Message
Location
United States
Desired salary
from 40 USD/hourly
Work preference
Full Time
Experience level
Not set

About

Professional summary

Dynamic Full Stack Web Developer with 10 years of experience designing and deploying full-stack web applications. Proven track record in enhancing user engagement, reducing deployment times, and optimizing onboarding processes. Skilled in JavaScript, Python, React, and Node.js, with strong Agile leadership and mentorship capabilities. Adept in responsive design and mobile development with an emphasis on performance optimization, web security, and user experience. Experienced in server-side rendering, cross-browser compatibility, webpack bundling, and devops practices. Proficient in continuous integration and Agile methodologies. AWS Certified Developer - Associate certified.

Skills

21 capabilities

Experience

Career history

Full Stack Web Developer Tonic.ai

Led Agile sprints and collaborated with cross-functional teams to deliver client-facing features. Improved dashboard performance by 45%, reducing average load time from 5 seconds to 2.75 seconds. Mentored 3 junior developers on clean code practices and Git workflows, enhancing their code quality by 35%. Built scalable RESTful APIs with integrated Auth0 OAuth authentication using Express.js. Optimized deployment pipelines using Docker and Kubernetes, achieving a 40% reduction in deployment time. Conducted A/B testing to support product iterations and measure feature adoption. Improved user retention by 20%, surpassing the benchmark of 65% to reach 78%. Applied mobile-first responsive design principles to ensure optimal performance across devices. Supported production systems used by 10,000 enterprise clients across North America and Europe. Ensured cross-browser compatibility and adherence to web security best practices across deployments. Implemented continuous integration strategies to streamline deployments.

Front End Developer Chisel

Developed UI components using React and Redux for a SaaS product with 50,000+ monthly users. Improved onboarding flow by 30%, reducing time from 10 minutes to 7 minutes. Collaborated cross-functionally with product managers and designers in a team of 10+ to deliver pixel-perfect designs across 3 major feature rollouts. Refactored legacy code into reusable components, reducing tech debt by 40% and boosting maintainability for the growing engineering team. Integrated analytics tools (Amplitude, Google Analytics), enabling an 18% improvement in data-driven product decisions. Led QA processes and debugging for major production releases with budgets exceeding $1M, impacting clients in fintech and healthtech sectors. Coordinated with the Lead Front-End Engineer and actively contributed to Agile development team deliverables (Scrum methodology) across time zones. Implemented webpack optimizations and server-side rendering. Reduced initial page load time by 35%, from 4.6 seconds to 3.0 seconds. Contributed to Agile methodologies and implemented DevOps practices like automated test pipelines to support continuous delivery. Authored frontend documentation and internal UI usage guidelines to ensure consistency and support onboarding of new developers.

Junior Developer Pangea.app

Developed and maintained internal dashboards using React and Material UI for client-facing tools, including user analytics panels and admin control widgets, increasing component reuse by 40% and reducing development time for new features by 20%. Developed backend Node.js scripts to support synthetic data generation and ensure GDPR compliance across three internal applications. Designed and implemented API endpoints to facilitate secure data transactions, achieving 99.9% uptime. Contributed to testing and debugging efforts, resolving an average of 8+ bugs per sprint and improving overall code reliability. Defined development tasks and contributed estimates during sprint planning, reducing delivery delays by 15%. Supported cloud service integrations, improving deployment automation and infrastructure scalability across staging environments. Collaborated with senior developers to implement Agile best practices and standardize CI/CD workflows. Improved login flow and user onboarding experience through authentication enhancements and responsive UI updates, boosting adoption rates among test users by 22%. Enhanced dashboard rendering speed by 25%, reducing average render time from 2.8 seconds to 2.1 seconds through front-end performance tuning. Contributed to code refactoring efforts that reduced bug reports by 30% over two quarters.

Education

Learning history

University of Denver

Bachelor of Science in Computer Science

Major: Data Science | Minor: Machine Learning

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