Open to PhD positions · Computer Vision · Explainable AI · LLM & RAG Systems

Trustworthy AI, built to be understood. 

Building transparent, deployable AI — from Q1 medical-imaging research to multilingual RAG assistants for education.

Sunzil Khandaker

Sunzil Khandaker

AI Researcher & Engineer

7

Research outputs

Published & under review

2+

Published papers

Q1 Elsevier journals

Q1

Elsevier journals

Peer-reviewed, indexed

2+

Years in AI research

CV, XAI, LLM/RAG

01Research

Computer vision & AI for education — made transparent.

AI Researcher and Engineer at Daffodil International University (top-5 in Bangladesh). Author of 7 research outputs spanning deep learning, Explainable AI, LLM engineering and IoT, including peer-reviewed work in Q1 Elsevier journals. My research centers on trustworthy computer vision and AI for education — with a parallel track applying these methods to real-world automation systems, and as Co-founder of AbSun Studio.

01

Trustworthy Computer Vision

Hybrid CNN–ViT architectures for fine-grained recognition, paired with diagnostic evaluation frameworks that expose hidden bias and performance plateaus before deployment.

  • CNN
  • Vision Transformers
  • Medical imaging
  • Fine-grained recognition
02

Explainable AI (XAI)

SHAP, LIME and GradCAM-based interpretability, including a novel study of explainability drift introduced by INT8 quantization on edge-deployed models.

  • SHAP
  • LIME
  • GradCAM
  • Quantization
  • Edge AI
03

AI for Education (LLM & RAG)

Multilingual retrieval-augmented assistants for university learning-management systems, with bilingual evaluation protocols for factual accuracy, safety and cultural appropriateness.

  • LLM fine-tuning
  • RAG
  • LangChain
  • ChromaDB
  • Bengali NLP
04

Applied AI & IoT Systems

Low-cost sensing and localization systems — from soil-health IoT to coverage-preserving ensemble methods for robust indoor localization.

  • IoT
  • LoRa
  • Ensemble learning
  • Indoor localization
02Publications

Seven research outputs — led by Q1 work.

Peer-reviewed journals, conference papers and a curated dataset spanning deep learning, explainable AI, LLM/RAG and IoT.

Q1 · Elsevier
Journal2025

Transparent Deep Learning for Medicinal Plant Recognition: A Hybrid CNN–ViT Approach

Smart Agriculture Technology

A hybrid CNN–ViT model for medicinal plant recognition coupled with explainability, delivering transparent, high-accuracy classification.

Khandaker, S., et al.Published
Q1 · Springer Nature
Journal2026

Quant-XAI: Quantifying and Mitigating Explainability Drift Under INT8 Quantization in Edge-Deployed Visual Classification

Scientific Reports

A novel framework to quantify and mitigate explainability drift introduced by INT8 quantization in edge-deployed vision models. Preprint available.

Khandaker, S.Under Review
Q1 · Elsevier
Journal2026

TurmericNet: An Explainable Hybrid Attention Network for Efficient Edge-Based Plant Disease Diagnosis

Computers and Electronics in Agriculture

An explainable hybrid attention network optimized for efficient, edge-based plant disease diagnosis.

Khandaker, S.Under Review
Q1 · Elsevier
Dataset2025

BDHerbalPlants: Augmented and Curated Herbal Plants Image Dataset

Data in Brief

A curated, augmented image dataset for medicinal-plant computer vision. Published in Elsevier's Data in Brief — a Q1 Artificial Intelligence in Agriculture-adjacent venue.

Khandaker, S., Rahman, M.Published
  • IEEEJournal2025

    A Coverage-Preserving Ensemble Framework with Minority Recovery for Robust Indoor Localization

    International Journal of Activity and Behavior Computing

    Published
  • IEEEConference2025

    SolarLoRa: A Low-Cost IoT System for Soil Health Monitoring

    IEEE ICCIT-2025

    Published
  • IEEEConference2026

    BanglaRAG: Building a Multilingual Knowledge Backbone for LMS

    IEEE QPAIN-2026

    Published
03Research projects

From published papers to shipped systems.

Flagship projects where research meets engineering — multilingual RAG for education, AI content generation, and explainability under deployment constraints.

P1

ChatEdu / BanglaRAG

Agentic, AI-powered learning & teaching assistant for university LMS

Published · IEEE Access in progress

RAGLangChainChromaDBLLMBengali NLP

A multilingual, retrieval-augmented assistant that ingests complex academic PDFs into optimized embeddings for local LLM retrieval, with bilingual (English/Bengali) evaluation protocols for factual accuracy, safety and cultural appropriateness.

  • ChromaDB + LangChain retrieval pipeline over academic course material
  • Bilingual evaluation protocol for accuracy, safety and cultural fit
  • Published as IEEE QPAIN-2026 — extended version on the way to IEEE Access

Paper: BanglaRAG: Building a Multilingual Knowledge Backbone for LMS (IEEE QPAIN-2026)

View on GitHub
P2

Team Murikha

AI-powered education content generation, full-stack web application

Active

Next.jsDrizzle ORMGenerative AIFull-stack

A collaborative full-stack platform for AI-assisted educational content generation, built with Next.js (App Router) and Drizzle ORM with a component-driven UI and real-time context management.

  • Next.js App Router + Drizzle ORM, component-driven architecture
  • Server-side API routes with real-time context management
  • Core developer within a multi-person team
View on GitHub
P3

Quant-XAI

Quantization impact analysis on explainability

Under review (Q1) · Preprint available

XAIQuantizationEdge AIVision

A framework to quantify and mitigate explainability drift introduced by INT8 quantization in edge-deployed visual classification models.

  • Novel diagnostic for explainability drift under INT8 quantization
  • Targets edge-deployed vision classifiers
  • Submitted to Scientific Reports, Springer Nature (Q1) — preprint available
04Academics

A foundation built on rigor.

Daffodil International University (DIU)

Top-5 University in Bangladesh

2022 — 2025

B.Sc. in Computer Science & Engineering

3.97 / 4.00

CGPA

Focus: Data Science · Computer Vision · Deep Learning

Machine Learning Researcher

NanoBio Research Lab, Daffodil International University

Jan 2025 — Present
  • Conducted research at the NanoBio Research Lab — applying computer vision, XAI, and deep learning to real-world biological and agricultural challenges.
  • Designed XAI-based diagnostic evaluation frameworks to measure accuracy, detect hidden bias and identify performance plateaus; findings directly informed retraining strategies.
  • Curated and published the BDHerbalPlants image dataset (Elsevier, Data in Brief) with strict annotation consistency across multi-source inputs.
  • Built automated Python tooling to surface and visualize failure patterns, cutting manual review overhead with statistically grounded evidence.

Technical toolkit

AI & Deep Learning

PyTorchTensorFlowHugging Face TransformersScikit-learnXGBoostCNNViTLLM Fine-tuning (SFT/PEFT/LoRA)

LLM & RAG Engineering

LangChainRAG ArchitecturesPrompt EngineeringChromaDBPineconeVector EmbeddingsBias & Safety Evaluation

Explainability (XAI)

SHAPLIMEGradCAMINT8 Quantization AnalysisDiagnostic Frameworks

Automation & APIs

n8n (production)FastAPIREST APIsAWS (basics)

Data & Languages

Python (Advanced)SQLRPandasNumPyMatplotlibSeabornPower BIGitJupyter

Linguistics

Bengali (Native)English (Advanced — C1)
05Industry & startup

Research methods, applied to real-world automation.

Alongside academic work at the NanoBio Research Lab, I build production AI systems — voice agents, lead-generation pipelines and operational automation — for service businesses, both inside industry teams and as Co-founder of AbSun Studio.

In a company

Joint Venture AI, Betopia Group

Jr. AI Developer · Remote

Apr 2026 — Present
  • Build and optimize text-processing pipelines that transform raw multi-source documents into high-quality training sets for LLM and RAG systems.
  • Evaluate human-annotated data for consistency, helpfulness, safety and alignment across large-scale corpora; report actionable quality metrics.
  • Collaborate with international teams to benchmark generative-AI performance and deliver structured improvement recommendations.

Co-founded & led

AbSun Studio logo

AbSun Studio

As Co-founder of AbSun Studio, I design and ship production AI systems — voice agents, lead-generation pipelines and operational dashboards — for service businesses (cleaning, HVAC, property), built on n8n, Vapi, OpenAI and FastAPI. Research-grade rigour applied to real business problems.

Visit absunstudio.com

Voice Agents

Inbound/outbound voice agents that qualify callers, book jobs and log calls in real time — wired into scheduling and CRM with automatic knowledge-gap capture.

VapiWebhooksLLM routingGoogle Sheets / CRM

Lead Generation & Routing

Multi-channel intake (WhatsApp, voice, web) with AI cleaning, intent routing, escalation alerts and instant replies that turn enquiries into booked work.

TwilioWhatsAppn8nOpenAI

Operational Dashboards

Scheduled reporting flows that read bookings, calculate daily revenue and dispatch owner-ready summaries automatically.

n8n (cron)SheetsNotifications

Customer WhatsApp Handler

Webhook → Extract → AI Agent → Route → Book → Notify

  1. 01WhatsApp webhook ingests text or voice messages
  2. 02Voice transcription + AI cleaning manager normalizes intent
  3. 03Travel-time + schedule conflict checks before booking
  4. 04Logs booking, alerts owner, replies to the customer

Voice Agent Call Pipeline

Vapi Webhook → Classify → Book / Log → Knowledge-gap capture

  1. 01Handles Vapi voice events and classifies booking vs. end-of-call
  2. 02Saves bookings and call logs to the source of truth
  3. 03Extracts knowledge gaps and writes them back for review

Daily Owner Dashboard

Cron (8PM, Mon–Sat) → Read → Calculate → Send

  1. 01Scheduled trigger reads the day's bookings
  2. 02Calculates revenue and key operational metrics
  3. 03Sends a concise dashboard summary to the owner

Selected case studies

Production systems built and deployed at AbSun Studio — real client engagements across cleaning, property tech and service automation.

Just For You — Cleaning AI workflow screenshot
📍 Dubai, UAE
Professional Cleaning

Just For You — Cleaning AI

Workflow

WhatsApp → Sara AI → Conflict Check → Book → 8PM Dashboard

Challenge
Missed WhatsApp inquiries during off-hours and manual booking errors led to lost revenue and scheduling conflicts.
Solution
Full AI WhatsApp + voice agent pipeline: GPT-4o-mini powered 'Sara', auto-booking with travel-time conflict detection, zone routing, and an automated 8PM owner dashboard.
Result
100% inquiry response rate 24/7; booking confirmation cut from hours to under 2 minutes; daily revenue visibility fully automated.
n8nGPT-4o-miniTwilioWhatsAppGoogle Sheets
ParrotScout workflow screenshot
📍 United States
HVAC Lead Collection

ParrotScout

Workflow

Vapi Voice Call → Extract Lead → Google Sheets → SMS + Email Alert

Challenge
Inbound demo calls were untracked, leads slipped through the cracks, and the team had no instant visibility into caller intent.
Solution
Deployed a Vapi voice agent that handles inbound calls, extracts structured lead data (name, address, callback number), logs to Google Sheets, and fires SMS + email alerts to admin in real time.
Result
Zero missed leads; every call yields a structured record within seconds; admin notified by SMS in under 30s of call completion.
Vapin8nTwilio SMSGmailGoogle Sheets
Dream Sleep Center — Dream Specialist AI workflow screenshot
📍 United States & Canada
Sleep Health / Intent-Based AI

Dream Sleep Center — Dream Specialist AI

Workflow

Voice Call → Intent Classification → Booking / Escalation → CRM Log

Challenge
Sleep consultation inquiries across the US and Canada were handled manually, leading to delayed responses and lost appointments.
Solution
Built an intent-based voice AI that classifies caller intent (booking, consultation, inquiry), routes to the right specialist pathway, and logs structured data — fully automated intake for a sleep health practice.
Result
Automated intake across two countries; instant intent classification on every call; structured consultation records logged without any human intervention.
Vapin8nOpenAIIntent ClassificationCRM

Before this system, we were losing bookings every night. Now Sara handles everything — the customers don't even realize they're talking to AI. Our response time went from hours to minutes.

Owner, Professional Cleaning Company — Dubai, UAE

ParrotScout changed how we handle inbound calls. Every lead is captured, logged, and I get a text the second a call ends. It's like having a 24/7 receptionist that never misses anything.

Operations Lead, HVAC Service Company — USA

The Dream Specialist AI handles our intake across two countries without us lifting a finger. It knows exactly what each caller needs and routes them perfectly. It's transformed how we run the practice.

Director, Sleep Health Clinic — USA & Canada
06Teaching

Mentoring the next cohort of AI engineers.

Beyond research and industry, I teach — translating advanced AI engineering into hands-on learning for large cohorts.

Ostad

Teaching Assistant — AI Bootcamp

May 2026 — Present

  • Technical instruction for large-cohort learners across the AI Engineering Bootcamp and Master AI Automation & Build AI Agents programmes.
  • Hands-on workshops on LLM orchestration, RAG pipelines, no-code AI automation (n8n) and data engineering.
  • Troubleshoot complex coding challenges for learners transitioning into AI roles.

What students say

Anonymous feedback from learners across Ostad's AI programmes.

The n8n and RAG sessions completely changed how I think about AI. I went from zero automation experience to building my own WhatsApp AI agent in one week.

Master AI Automation

Cohort 3, 2026

Anonymous

Sunzil has a rare ability to make complex topics feel approachable. The way he explained prompt engineering and memory management was genuinely the clearest I've heard it.

Master AI Automation

Cohort 2, 2026

Anonymous

I was stuck on my LLM fine-tuning project for days. One session with Sunzil and the blockers were gone. He doesn't just fix bugs — he teaches you how to think through them.

AI Engineering Bootcamp

Cohort 1, 2026

Anonymous

Honestly the best TA I've had. He shows up prepared, explains with real examples from his own research, and actually cares whether we understand or not.

AI Engineering Bootcamp

Cohort 4, 2026

Anonymous

Contact

Let’s discuss research, collaboration, or a PhD opportunity.

Google ScholarLinkedInGitHubKaggle+880 16 2699 2241Dhaka, Bangladesh