Muhammad Daffa Quraisy

Developed high-throughput pipelines using Amazon MWAA (Managed Airflow) and EMR (Apache Spark) to process raw data into structured layers with dbt models for schema structure and data quality standards.

Engineered centralized GraphQL gateway using Golang to unify access to fragmented financial data ecosystem. Consolidated customer profile data, portfolio information, and funding analytics across distributed data sources.

Redesigned legacy REST API into GraphQL gateway for merchant payment analytics. Implemented aggregation pipelines for transaction summaries, historical analysis, and merchant performance metrics.

Developed centralized knowledge graph to unify disconnected internal applications using Ontotext database. Engineered metadata-driven pipeline for DDL structure mapping and CDC pipeline synchronizing Microsoft SQL Server updates. Built Node.js/Express backend with PostgreSQL for authentication and RBAC.

Designed end-to-end data architecture for intelligence platform monitoring economic sectors (Mining, Marine & Fisheries, Trade, Industry). Built orchestration layer with Apache Airflow managing ingestion from REST APIs, MongoDB, Excel/CSV, and web scraping. Developed Express.js backend with RBAC for sector-specific analytical dashboards.

Developed core data infrastructure and backend services for executive dashboard monitoring national stability across political, economic, and security sectors. Built custom pipelines to ingest data from REST/GraphQL APIs, Elasticsearch, MongoDB, and unstructured documents. Created Express.js backend aggregating disparate sources for geospatial visualization.

Developed backend service and data access layer for election monitoring dashboard. Collaborated with Data Scientists to translate visualization requirements into optimized database queries. Implemented efficient SQL queries for analytical metrics including candidate electability and regional sentiment trends. Exposed metrics through Node.js/Express API.

Architected backend infrastructure for corporate event platform managing Year-End and Kick-Off gatherings. Designed relational database tracking employee profiles, service tenure, leave history, and seating logistics. Engineered gamification logic for Gift Exchange and Door Prize systems with inventory management. Developed weighted scoring algorithm for Employee MVP awards synthesizing peer votes with performance data.

Contributed to backend modernization of legacy operations management system tracking readiness, assets, personnel, and operational planning. Migrated core modules from PHP 5 monolith to TypeScript/NestJS architecture. Executed database migration from MySQL to PostgreSQL ensuring data integrity and improved query performance.