PT. Tristar Surya Gemilang

Enhancement AI-enabled Invoicing System (EMP Bentu Limited)

• Express.js
• React
• PostgreSQL
• n8n
• OCR / Document AI
• LLM / AI Extraction
• REST API
• Object Storage

• Reduced error rate in document set creation from 4–8 errors/day to 0 through optimized data integration.
• Resolved race conditions in document set creation by implementing queue workers.
• Performed prompt engineering to prevent LLM responses from breaking workflow logic.
• Built end-to-end workflow integrating n8n automation for automatic email and invoice document processing.
• Implemented AI services for document classification (Invoice, Tax Invoice, BAST).
• Developed human-in-the-loop mechanisms through 3-way matching between Invoice, PO, and supporting documents.
• Handled various invoice formats from vendors with different templates and data structures.
• Improved AI/OCR accuracy for data extraction from scanned documents with varying quality.
• Integrated AI workflow with existing invoicing processes without disrupting ongoing operations.
• Maintained data consistency across invoice data, extraction results, and audit trail for compliance.

Badiklat BPK

Knowledge Management System

• React
• Golang (Fiber)
• SQL Server
• OpenAPI
• LDAP Integration

• Scaffolded project architecture from scratch using React, Golang (Fiber), and SQL Server.
• Integrated OpenAPI-based video transcript and summarization capabilities.
• Integrated connection with existing enterprise LDAP authentication system.
• Developed coaching and mentoring module with historical tracking (full stack).
• Built end-to-end features across frontend, backend, and database layers.

Bank BJB Syariah

Aplikasi Monitoring Program Kerja dan Inisiatif Strategis

• React
• REST API
• PostgreSQL / MySQL
• Dashboard Analytics
• Role-Based Access
• Export Excel / PDF
• Notification System

• Reduced initial load time from 3,000ms to 500ms through reusable content patterns.
• Optimized database query load time with indexing, caching, and materialized views — 500–3,000ms average speed improvement.
• Integrated AI for threshold-based dashboard alerts to detect anomalies.
• Managed development transition from previous developer, ensuring BRD/FSD/workflow alignment.
• Managed dynamic requirement changes, performing impact analysis across business process, design, development, SIT, and UAT.
• Maintained traceability between requirement, implementation, and testing via documented change requests.
• Built RESTful APIs supporting data analysis and dashboard presentation.
• Designed data pipeline from multiple sources ensuring accurate, consistent information.
• Developed analytics features for identifying deviations, risks, and execution delays.

PT Tripatra Engineers and Constructors

E-Procurement System

• Golang
• Gin Framework
• Next.js
• PostgreSQL / SQL Server
• Workflow Engine
• Document Management
• Email Notification
• ERP Integration

• Led technical stack migration from PHP to Golang and React, improving load time by 1,000–3,000ms per action.
• Migrated database from MySQL to PostgreSQL to meet company standards.
• Migrated millions of transactions from MySQL to PostgreSQL using Azure Data Factory.
• Fixed SAP integration failures from 6–12 errors/day to 0 through systematic debugging.
• Designed dynamic approval workflows differing by procurement type and value.
• Integrated procurement system with ERP and supporting systems.
• Managed large volumes of procurement documents with versioning and traceability.
• Accommodated multi-role stakeholders (requester, buyer, approver, vendor) in one integrated platform.
• Managed complex procurement processes including request, tender, vendor evaluation, and contract management.

PT Tripatra Engineers and Constructors

TAP MM — Material Management System

• React
• Golang
• PostgreSQL / SQL Server
• GraphQL API
• Workflow Approval
• Document Management
• SAP Integration

• Optimized state management: refactored overused useState causing unresponsive pages by implementing Zustand.
• Implemented Context API pattern to solve excessive property-passing between components.
• Significantly improved database query performance for heavy modules using materialized views, reducing load times by up to 95%.
• Implemented proper transaction handling to resolve frequent database locking issues.
• Standardized repetitive code through reusable component patterns.
• Refactored monolithic components exceeding 1,000 lines into smaller, maintainable components.
• Handled legacy codebase with minimal documentation, analyzing source code within node_modules.
• Integrated SAP via XML without documentation, performing field mapping through structural analysis.
• Built customized features including dynamic tables, PDF Viewer, and PDF Editor for user workflows.
• Designed end-to-end application architecture including frontend, backend, and database.

PT. Narcon Global

Sistem Informasi Manajemen Rumah Sakit (RS Azra)

• Angular
• TypeScript
• REST API
• Database Design

• Developed a web-based Hospital Management Information System (SIMRS) using Angular and TypeScript for the frontend, supporting clinical and administrative processes.
• Built responsive frontend and backend services for medical transaction and patient data management.
• Designed databases and RESTful APIs supporting inter-module hospital system integration.
• Implemented authentication, authorization, and patient data security mechanisms.
• Developed integrations with laboratory, billing, and supporting services.
• Performed testing, debugging, and performance optimization for high-load stability.
• Supported deployment, maintenance, and feature development based on user requirements.