Samim Reza
Samim RezaDhaka, Bangladesh

Samim Reza

Senior AI Software Engineer at SloanCode, New York. Founder of Callisa and Wasilah. I build voice agents, RAG systems and ML pipelines.

On the line

Twilio → OpenAI Realtime → FastAPI

The call path behind SloanCode's AI receptionist.

SloanCode AI Receptionist

SloanCode AI Receptionist↗

Live, multi-tenant AI phone receptionist for New York restaurants and home services, with OpenAI Realtime voice over Twilio, CRM, kitchen flow, Toast/Square/Clover POS and Stripe.

Callisa

Callisa↗

AI voice and chat agents for clinics, real estate, home services and e-commerce. Streaming STT, LLM and Azure TTS over Telnyx, plus web chat, WhatsApp, Messenger, SMS and calendar sync.

Work

Experience

All experience →

May 2026 – Present

New York, NY, United States

SloanCode

Current

Senior AI Software Engineer

  • Engineer a live, multi-tenant AI phone receptionist SaaS for New York restaurants and home services.
  • Own the AI voice workflow (OpenAI Realtime, Twilio), the FastAPI and Redis backend, Next.js portals, CRM and kitchen flow.
  • Integrated Toast, Square and Clover POS and Stripe; added tenant-scoped roles, MFA and secret scanning.
OpenAI RealtimeTwilioFastAPIRedisPostgreSQLNext.jsStripe

Aug 2026 – Present

Remote from Dhaka, Bangladesh

Nuhu Labs

Current

Software Engineer

  • Shipping the Linux port of Byakaron, a Bangla phonetic keyboard, on the shared Zig engine through its C ABI.
  • Built the IBus/Fcitx5 input method in C, a GTK3 companion app, and the .deb and Flatpak packaging.
  • Released v0.2.0 with Wayland CI.
CZigIBusFcitx5GTK3Flatpak

Dec 2025 – Sept 2026

Dhaka, Bangladesh

Brandifies

Machine Learning Engineer

  • Built end-to-end ML pipelines: preprocessing, feature engineering, training, and evaluation.
  • Fine-tuned LLMs and implemented RAG-based chatbot systems with vector databases.
  • Developed predictive models using XGBoost and similar boosting algorithms.
PythonPyTorchLangChainRAGXGBoost

More work

Projects

All projects →
Wasilah

Quran habit app built around one ayah a day, with a streak engine that survives timezone changes, DST, offline reads and device clock jumps, plus offline sync, reminders and guest mode.

ExpoReact NativeTypeScriptSupabase
KobitaLM

Gemma 2 9B fine-tuned with LoRA and RAG for Bengali poetry generation. Published at IEEE COMPAS 2026.

PyTorchGemma 2LoRARAG
IRIS

Human-in-the-loop active learning under noisy annotators, with a reliability gate and an introspection head. 285 reproducible runs on Fashion-MNIST, BloodMNIST and CIFAR-10.

PyTorchPythonActive learning
Personal AI Assistant

The assistant on this site, answering questions as me. A Next.js route streams replies from Groq with retrieval over a private profile.

Next.jsTypeScriptGroqRAG
TrueDoc

SaaS for digital document attestation in Bangladesh with QR-backed verification, role-based access for citizens, verifiers and organizations, JWT auth and BDT payments.

DjangoReactPostgreSQL
GoUp

Lead Ads automation platform that syncs pages and forms through Meta API webhooks, then triggers SMS follow-ups with Celery and Redis.

DjangoCeleryRedisTwilio

Papers

Research

About

Me

Samim Reza

Samim Reza

I'm a Senior AI Software Engineer at SloanCode in New York and a software engineer at Nuhu Labs, and I founded Callisa and Wasilah. I build AI voice agents, RAG systems, ML pipelines, native Linux input methods, and full-stack apps that solve real problems. 3x ICPC Regionalist with two papers at IEEE COMPAS 2026, a travel lover, and always learning.

Voice AI
OpenAI RealtimeTwilioTelnyxAzure TTSTool-calling agents
AI / ML
PyTorchTensorFlowScikit-learnLangChainRAGVector DBs
Web & mobile
FastAPIDjangoNext.jsReactReact NativeExpoPostgreSQLSupabase
Languages
PythonTypeScriptCC++JavaZig
Systems
LinuxIBusFcitx5DockerRedisCeleryStripe

Code

GitHub activity

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Milestones

Journey

“Secrets are precious they loose value when revealed”

— Self quote

© 2026 Samim Reza. All rights reserved.

Dhaka · New York