Portfolio / Project archive
Projects.
Applications, integrations and tools I’ve worked on — from business software and public-sector platforms to AI and automation.
Applications01
Financial data platform
Money360 application
Backend and document-processing work for a platform that reads bank statements and extracts structured transaction data.
Work and responsibilities — Money360 application
- Built PDF and Excel parsing pipelines for automated transaction extraction.
- Worked across storage, parsing, backend services, and downstream analysis workflows.
- Used PHP, Python, Apache Tika, AWS S3, MongoDB, Redis, and AI-assisted processing components.
PHPPythonDocument parsingFinancial dataAWS S3
Applications02
Internal HR operations
HRStreamline HRMS
Human Resource Management System for employee records, workflows, and administrative operations.
Work and responsibilities — HRStreamline HRMS
- Developed backend modules and APIs for HR workflows.
- Added automation features to reduce manual handling.
- Improved maintainability around day-to-day administrative usage.
HRMSBackend APIsAutomationPHP
Public sector03
Deputy Commissioner Office, Jammu
BADP-SSY web and Android app
Beneficiary management, project tracking, and fund monitoring platform under the BADP program.
Work and responsibilities — BADP-SSY web and Android app
- Built workflows for project visibility and fund monitoring.
- Worked with government stakeholders to digitize administrative processes.
- Focused on transparency, traceability, and field-friendly usage.
GovernmentWeb appAndroid appWorkflow digitization
Public sector04
Himachal Pradesh Real Estate Regulatory Authority
HP RERA platform
Core modules for registrations, project approvals, and grievance-handling workflows.
Work and responsibilities — HP RERA platform
- Worked on RERA registrations, approvals, and grievance modules.
- Improved system performance and user experience.
- Balanced usability with compliance-heavy regulatory requirements.
GovernmentComplianceApprovalsGrievance workflows
AI & automation05
AI-powered backend systems
RAG and semantic search pipelines
Retrieval-Augmented Generation pipelines for document understanding, search, and AI-assisted workflows.
Work and responsibilities — RAG and semantic search pipelines
- Designed ingestion, parsing, chunking, embeddings, vector search, and answer workflows.
- Integrated LLMs into backend systems and APIs.
- Used Qdrant, FAISS, AWS Bedrock, LlamaIndex, HuggingFace, LiteLLM, and FastAPI.
LLMRAGQdrantFAISSFastAPI
AI & automation06
Internal process automation
n8n workflow automation
Workflow automation for internal processes, AI pipelines, notifications, and data movement.
Work and responsibilities — n8n workflow automation
- Built repeatable workflows around APIs and backend services.
- Connected automation steps to AI-assisted processing flows.
- Reduced manual operational work in recurring business processes.
n8nAutomationAPIsAI workflows
Applications07
RITCOP IT Services LLP
Business websites, CMS, ERP, and ecommerce systems
Long-running web development work across business websites, CMS systems, ERP-style modules, and ecommerce workflows.
Work and responsibilities — Business websites, CMS, ERP, and ecommerce systems
- Built and maintained PHP-based business applications.
- Delivered backend modules, integrations, and operational dashboards.
- Provided consultancy around web development and IT infrastructure.
PHPCMSERPEcommerceConsulting
Tools08
rahulrehan.com/tools
Public utility tools
Small web utilities including hash generators and calculators hosted on the personal site.
Work and responsibilities — Public utility tools
- Built PHP hash utilities for MD5, SHA1, and PHP password hashing.
- Added EMI and inflation calculator pages.
- Kept tools lightweight and directly usable from the browser.
PHPUtilitiesCalculatorsHash tools
Applications09
Personal / operational tooling
Expense management system
Expense tracking and management tool linked from the personal site.
Work and responsibilities — Expense management system
- Built as a practical operations-focused web tool.
- Focused on quick entry, tracking, and personal finance visibility.
- Part of the broader set of lightweight business and productivity utilities.
Expense trackingWeb appOperations
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