New Delhi, India

LLM engineer building useful AI into real backend systems.

I design RAG pipelines, document-processing services, workflow automations, and production APIs. My base is still strong backend engineering: PHP, Python, FastAPI, data stores, cloud infrastructure, and the discipline needed to keep systems maintainable in production.

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LLMs RAG Vector search Document parsing Backend APIs n8n automation
Illustrated avatar of Rahul Rehan

Rahul R.

Senior Software Consultant at RITCOP IT Services LLP and Fractional CTO at Digitech Systems & Infocom.

Current focus

RAG systems for document understanding, semantic search, and AI-assisted workflows.

Engineering base

Backend architecture, APIs, financial data pipelines, HRMS systems, and government platforms.

Delivery stack

PHP, Python, FastAPI, MongoDB, Qdrant, AWS Bedrock, S3, Redis, FAISS, Tika, Git, and n8n.

Profile

Backend first. LLM-ready where it matters.

I work at the layer where messy documents, business rules, cloud services, and users meet. The goal is to make workflows faster, searchable, auditable, and easier to operate.

RAG and retrieval systems

Document ingestion, parsing, chunking, embeddings, vector indexes, semantic search, and answer workflows wired into existing applications.

Backend platforms

APIs, data processing services, financial statement extraction, HRMS modules, and reliable PHP/Python systems for business use.

Workflow automation

n8n workflows, internal process automation, AI API integration, cloud deployment, and practical tooling for repeatable operations.

Selected work

Projects with real users and real constraints.

A mix of AI pipelines, financial automation, HR operations, and public-sector platforms.

RITCOP IT Services LLP

Money360 application

Backend and document-processing work for a financial data platform that reads bank statements and extracts structured transaction data.

  • Built PDF and Excel parsing pipelines for automated extraction and analysis.
  • Worked across backend services, storage, parsing tools, and downstream financial workflows.
  • Used PHP, Python, Apache Tika, AWS S3, MongoDB, Redis, and AI-assisted processing components.

RITCOP IT Services LLP

HRStreamline HRMS

Internal human resource management system for employee records, workflows, and administrative processes.

  • Developed backend modules and APIs for operational HR workflows.
  • Added automation features to reduce manual process handling.
  • Improved the underlying system around maintainability and day-to-day usage.

Digitech Systems & Infocom

BADP-SSY web and Android app

Beneficiary management, project tracking, and fund monitoring platform for the Deputy Commissioner Office, Jammu.

  • Built digital workflows for district-level project visibility and fund monitoring.
  • Worked with government stakeholders to translate administrative process into usable software.
  • Focused on transparency, traceability, and field-friendly implementation.

Digitech Systems & Infocom

HP RERA platform

Core modules for the Himachal Pradesh Real Estate Regulatory Authority platform.

  • Worked on RERA registrations, project approvals, and grievance-handling flows.
  • Improved performance and user experience around regulatory workflows.
  • Balanced usability with compliance-heavy process requirements.
View more projects

Experience

A backend career moving into applied LLM systems.

Software consulting, CTO-level execution, product backends, AI integrations, and long-running web platforms.

Sep 2024 - PresentNew Delhi

Senior Software Consultant

RITCOP IT Services LLP

  • Design and develop backend systems, APIs, data processing services, and AI-powered workflows.
  • Build RAG pipelines for document understanding, intelligent retrieval, embeddings, and vector search.
  • Integrate LLMs with backend applications using AWS Bedrock, LlamaIndex, HuggingFace, FAISS, Qdrant, LiteLLM, and n8n.
Sep 2024 - PresentNew Delhi

Fractional CTO

Digitech Systems & Infocom Private Limited

  • Lead technical delivery for public-sector web and mobile platforms.
  • Shape architecture, execution plans, and workflow digitization for government-facing systems.
  • Worked on BADP-SSY and HP RERA platforms across beneficiary management, approvals, grievances, and monitoring flows.
Jan 2022 - Aug 2024Gurugram

Sr. Software Developer

Acquara Management Consultant

  • Delivered backend and web application development across business software requirements.
  • Worked with PHP-based systems, integrations, and operational application modules.
Jul 2015 - Dec 2021New Delhi

Software Developer to Sr. Software Developer

RITCOP IT Services LLP

  • Built and maintained websites, ERP-style modules, CMS systems, ecommerce workflows, and business applications.
  • Grew from part-time software developer into senior delivery ownership across backend and web projects.
May 2015 - Jun 2015Noida

Web Development Intern

Wollmilchsau GmbH

  • Early web development internship focused on practical application work and production team habits.

Stack

Tools I use when the work has to ship.

The exact tool changes by problem, but this is the working set from recent AI, backend, and automation projects.

AI and retrieval

LLM systems, semantic retrieval, embeddings, parsing, and model API integration.

RAG Embeddings Qdrant FAISS AWS Bedrock LlamaIndex HuggingFace LiteLLM

Backend and data

Application backends, APIs, document services, storage, queues, and operational data flows.

PHP Python FastAPI MongoDB Redis Apache Tika Git

Cloud and automation

Deployment, workflow orchestration, file pipelines, and integrations around business systems.

AWS AWS S3 n8n APIs MCP Workflow automation

Contact

Open to senior backend, LLM/RAG, and automation work.

Best fit: teams that need a practical engineer who can move between business requirements, backend implementation, data pipelines, and LLM integration without treating AI as a shortcut.

LinkedIn linkedin.com/in/rahulrehan GitHub github.com/rahulrehan20 Website rahulrehan.com
2012 - 2016

B.Tech, Computer Science

Rajasthan Technical University, Kota

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