~/krishna_dhakal

#AWS#Bedrock#RAG#Guardrails#Privacy

PII & PHI Detection and Redaction in AI Pipelines — with AWS Bedrock Guardrails

> July 1, 2025

Why PII and PHI must be protected in AI systems, the different ways to detect and redact sensitive data, and how AWS Bedrock Guardrails fits into a RAG pipeline built on S3, Bedrock Knowledge Base, and LangChain.

// read_more →

$ ls /blog →

// projects

> escrow-agent

Multi-signature transaction platform with a Go backend and PostgreSQL, implementing cryptographically secure payment orchestration workflows.

> crowdsourced-book-platform

Next.js educational platform for children, with dynamic content management and interactive learning modules.

> textql

LLM-driven text-to-SQL pipeline using Google Gemini and FastAPI; normalizes natural language queries into structured SQL via prompt-engineered LLM calls.

> ocr-grocery-discount-designer

Automated retail asset generation using Tesseract OCR, Google Custom Search, and PIL — eliminating manual design work for weekly promotional materials.

> loki-log-aggregator

Observability stack using Grafana Loki, Prometheus, and Kubernetes for centralized log monitoring and alerting at scale.

> react-chimebox

Zero-setup feedback widget for static websites — users embed a single script tag to collect structured feedback. Built with Supabase, React, Netlify Functions, and Cloudflare Turnstile.

// experience

$ March 2025 – Present
Software Engineer – AI/ML & Full-Stack @ Leapfrog Technology
Architected end-to-end RAG pipelines and AI workflow automation using AWS Bedrock, Qdrant, and llama.cpp. Built an AI-powered Video Assistant and a conversational chatbot for a Nursing Management Platform with agentic orchestration over REST APIs.
$ Jan 2024 – July 2024
Professional Services Consultant – AI & Search @ Upland Software
Engineered enterprise-scale semantic vector search over 2M+ SharePoint documents using Azure OpenAI embeddings and Azure AI Search. Delivered an OCR + OpenAI pipeline for an Australian client to extract and index structured data from unstructured PDFs.
$ Nov 2023 – April 2024
Software Engineer – Full-Stack @ Sherpa Technologies
Led migration of a credit card dispute management platform from legacy infrastructure to GCP Cloud Functions using Node.js, TypeScript, and PHP. Drove cross-functional performance triage across client-facing web and mobile applications.
$ April 2021 – April 2022
Software Engineer – Blockchain & Web3 @ 0chain LLC
Re-architected a React-based blockchain explorer and maintained two Go CLI tools (zwalletCLI, zboxCLI) for 0chain's decentralized storage protocol. Migrated the business website to a Netlify CMS + GatsbyJS stack and contributed to a TypeScript + WebAssembly storage migration.
$ April 2020 – Nov 2023
Full-Stack Developer @ Freelance
Built production-grade platforms including a real-time media app (AWS S3, Redis, WebSockets) and SEO-optimized 3D animation sites using Three.js. Automated client workflows with Pipedream and AssemblyAI, and upgraded a financial trading platform built on Angular and TradingView APIs.

// products

// under_construction

// testimonials

"John's work is fantastic! He delivered exactly what we needed."

- Jane Smith, CEO of XYZ Company

"Working with John was a pleasure. He's professional and skilled."

- Bob Johnson, Freelance Designer

// roadmap

Learn advanced JavaScript frameworks
Contribute to open-source projects
Develop a mobile app