Harsh Jain (Harsh)

Results-driven Senior Full Stack Developer with 4+ years of experience designing and delivering secure, high-performance web applications across real-time gaming platforms, B2B SaaS dashboards, and multi-tenant systems. Deep expertise in React.js, Node.js, PostgreSQL, Redis, Socket.IO, and Docker. Proven ability to own features end-to-end — from database schema and REST API design to responsive frontend UI and containerized production deployment — in fast-paced Agile environments.

Full Stack Developer / Solution Engineer - Gammastack (GrepRuby Webtech) - Indore

(2022-06 - 2026-01)

• Delivered 3 production gaming platforms from zero to live — serving real B2B and B2C users — by owning the full stack end-to-end including React UI, Node.js APIs, PostgreSQL schema design, and Docker deployment.
• Reduced game state synchronization latency to sub-second across concurrent multi-user sessions by architecting Socket.IO real-time event pipelines integrated with Redux Toolkit on the frontend.
• Secured multi-tenant platform access across all user and admin API endpoints by implementing JWT-based authentication with RBAC and express-validator middleware, eliminating unauthorized access vectors.
• Accelerated feature delivery across 3 product lines by building 15+ RESTful APIs in Node.js and Express.js covering user management, game operations, wallet transactions, and real-time analytics.
• Expanded platform reach to international markets by integrating React I18next, enabling seamless multi-language content switching without page reloads.
• Reduced manual operations overhead for the business team by delivering real-time admin dashboards with transaction tracking, round history, user/IP monitoring, and bet management used daily by internal teams.
• Improved media asset delivery speed for geographically distributed users by configuring AWS S3-backed CloudFront CDN for all static assets, decoupling asset load times from server response times.
• Eliminated environment-specific deployment failures by establishing a Docker Compose and GitHub Actions CI/CD pipeline that standardized builds across development and production.

Frontend Developer Intern / Solution Engineer - Gammastack (GrepRuby Webtech) - Indore

(2022-01 - 2022-06)

• Contributed production-ready React components from the first month by building modular, reusable UI elements with Redux — reducing the team's repeated component work across features.
• Cut integration time for new API-driven features by abstracting REST API calls into standardized reusable components, improving codebase maintainability and developer onboarding speed.
• Improved page load performance on ad template pages by migrating legacy jQuery code to optimized Vanilla JavaScript and React, removing unused dependencies and reducing render-blocking scripts.
• Increased targeted content engagement by developing personalized Dynamic Yield (DY) ad modules that served user-specific content dynamically based on behavioural signals.

Bachelor's Degree - B.Tech in Computer Science and Technology - Lakshmi Narain College of Technology Excellence (2018-08 - 2022-06)

High School - Secondary Schooling - St. Joseph's Convent School (2018)