Shahtaz Rahman — Software Engineer

Software Engineer — Dhaka, Bangladesh

System Architecture · Backend · AI Systems · User Interface

Full-stack Engineer building multi-tenant SaaS, agentic AI systems, and RAG pipelines. From the requirements analysis to the product design.

View Projects Resume

PYTHON · DJANGO · FASTAPI · NODE.JS
GCP · AWS · DOCKER
MULTI-TENANT SAAS · RAG · AGENTS
3+ YEARS OF EXPERIENCES

01About

Architecture, backend, agents and interface, all by one engineer. Three years of shipping multi-tenant SaaS and agentic systems that run billing, messaging and AI conversations in production.

3+ years: Professional Experiences
20+: Products Shipped on Live

NowSoftware Engineer (L2) at Echologyx Ltd.
ShippedArgon Chatbot · Tourtoise
EducationB.Sc. Materials & Metallurgical Eng., BUET

See the projects Full experience

System architecture

Multi-tenant SaaS and data models designed to grow without rewrites.

●Argon Chatbot

Backend & integrations

Billing, webhooks and messaging channels that deliver reliably.

●Echologyx

AI agents & automation

Agents that retrieve, decide and act: grounded answers, lead scoring, bookings, human handoff.

●Echologyx · Tourtoise

Full products, solo

Idea to live product, interface included. One owner, no handoffs.

●Argon · Tourtoise

02Skills / Tech

Grouped by what each tool does. Highlighted ones are what I use day to day.

Backend & APIs

Services and real-time

Django
FastAPI
Node.js
GraphQL
WebSockets

Frontend

Interfaces and state

React
Next.js
TypeScript
Tailwind CSS
Framer Motion

AI & Retrieval

Agents and grounding

Google ADK
Langchain
Vertex AI
Pinecone
RAG

Data & Queues

Storage and async work

PostgreSQL
MongoDB
pgvector
Redis
Celery
Kafka

Integrations

Billing and channels

Stripe
Firebase
WhatsApp
Messenger
Instagram

Cloud & DevOps

Where it runs

Docker
AWS
Google Cloud
Cloudflare
Nginx
GitHub Actions

Daily driverAlso used

03Projects

Systems that I designed — architecture, schema, trade-offs and the parts that went wrong before they went right.

Multi-tenant agentic AI chatbot SaaS

Argon Chatbot

A multi-tenant agentic chatbot SaaS with workspace isolation and configurable chatbots.

Backend & AI systems engineerCASE STUDY

AI-powered travel planning platform

Tourtoise

A multi-agent travel platform for destination discovery, itinerary generation and personalized trip planning.

Backend & agent systems engineerCASE STUDY

04Experience

From Engineering thinking to solving actual problems

3+ years: Professional Experience

Software Engineer (L2)

Current

Echologyx Ltd.

Mar 2024 – Present2 yrs 8 mos

Software company building AI-powered chatbot solutions that help businesses automate customer conversations across digital channels.

SaaS architecture Built multi-tenant backend services with subscription and Stripe billing.
AI agent engineering Developed RAG-powered conversational systems using Google ADK and FastAPI.
Retrieval optimization Implemented vector search for knowledge retrieval and product recommendations.
Omnichannel messaging Integrated Messenger, WhatsApp, Instagram and transactional email.
Real-time infrastructure Worked on WebSockets, Redis and asynchronous workflows for live operations.

MERN Stack Developer

Aaykori Digital

Jul 2023 – Dec 20236 mos

A fintech startup developing affiliate marketplace and custom softwares for niche industries.

Affiliate marketplace Developed CMS features for product listings, campaign tracking and analytics.
HR management Built employee management modules and real-time performance dashboards.
Full-stack development Created REST APIs and reusable React components across products.