Yusup Adi Kristiyanto

• Worked on a multi-tenant learning and upskilling platform supporting learning pathways, SCORM modules, and certification systems.
• Key Contributions
• Developed and maintained backend APIs supporting learning pathways, SCORM course ingestion, and certificate generation.
• Implemented permanent tenant and user deletion pipeline across Firestore, BigQuery, Cloudinary, and Google Cloud Storage.
• Integrated HRIS platforms (Employment Hero and HiBob) for employee synchronization.
• Built Redis-based buffering mechanisms to prevent duplicate updates from HRIS and SCORM imports.
• Implemented pathway and certificate copy/synchronization features for tenant reuse.

Tech Stack:

• Node.js, Express, TypeScript
• Firebase (Auth, Functions)
• Google Cloud (Run, Pub/Sub, BigQuery, Firestore, Cloud Storage)
• Redis

• Built and maintained a multi-tenant wellness content platform supporting corporate wellbeing programs.
• Backend (Strapi 5)
• Implemented organization-based content segregation across campaigns, help-lines, and content pools using middleware and lifecycle hooks.
• Integrated Auth0 JWT authentication strategy with custom user handling.
• Configured AWS S3 media storage via Strapi upload provider.
• Developed custom Strapi admin plugins including content-pool action with search and multi-select functionality.
• Modeled CMS content types.

• Frontend (React)
• Adapted React components to consume Strapi 5 API structures.
• Migrated campaign routing from slug-based URLs to documentId routing.
• Implemented region-based feature flags to hide features for US clients.
• Maintained unit tests.

Tech Stack:

• Node.js, TypeScript
• Strapi 5, PostgreSQL
• AWS S3
• React, Vite

• Developed and maintained a camping site booking platform with payment and third party CRM integrations.
• Key Contributions
• Built backend APIs for booking management and reservation workflows.
• Integrated Stripe and Merchant Warrior payment gateways.
• Improved reliability of booking transactions and third-party integrations.

Tech Stack:

• Node.js, Express, Sequelize
• MySQL

• Maintained and enhanced an audition management platform used for managing participant registration, scheduling, and media processing.
• Implemented auto-scheduling workflows for audition events.
• Built media processing pipelines for file uploads and conversion.
• Maintained pre-test management system used during audition stages.

Tech Stack:

• Ruby on Rails
• MySQL
• Sidekiq
• AWS EC2
• AWS S3
• AWS MediaConvert

• Developed internal enterprise applications supporting supply chain and warehouse operations.
• Key Contributions
• Built warehouse management system with inventory and transaction tracking.
• Developed APIs for internal system integrations.
• Led a small development team responsible for system maintenance and support.

Tech Stack:

• Ruby on Rails
• PostgreSQL
• HTML, jQuery, AJAX

• Worked on Appschef, a SaaS enterprise platform offering modules for authentication, HR management, supply chain, finance, and project management.
• Key Contributions
• Developed enterprise web applications using Ruby on Rails.
• Contributed to SaaS modules including authentication and HR systems.
• Maintained legacy systems built with Ruby 1.8.x and Rails 3.x.

Tech Stack:

• Ruby on Rails
• MySQL
• JQuery, AJAX
• RSpec