Shahariar Imtiaz FahimLead Software Engineer

Lead Software Engineer

Hi, I’mShahariar Imtiaz Fahim.

I build dependable backend systems and lead teams from complex ideas to reliable products.

My work spans distributed services, data-intensive platforms, and cloud delivery using NestJS, FastAPI, and ASP.NET Core. I care about architecture that stays understandable and software that keeps working when usage grows.

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Portrait of Shahariar Imtiaz Fahim
CurrentlyLead Software Engineer

NAFS Technologies · Since Jan 2023

Dhaka, Bangladesh

C#PythonTypeScriptNestJSFastAPIASP.NET Core

About

I turn complex backend requirements into systems teams can understand, operate, and grow.

I’m Shahariar Imtiaz Fahim, a software engineer focused on dependable, high-impact products. I own architecture decisions, align engineering work with product goals, and guide delivery with clarity.

I work best in collaborative teams where mentoring, thoughtful reviews, and operational discipline raise the quality of both the software and the people building it.

Architecture ownershipClear deliveryTeam leadership

Expertise

Core Area

01

API & Platform Design

Designing backend services and internal platforms with clear contracts, maintainable boundaries, and production-focused delivery.

  • • REST and GraphQL APIs
  • • Service design with NestJS, FastAPI, and ASP.NET Core

Core Area

02

Data & Async Systems

Choosing practical data models and background processing patterns for reliability, queue-heavy workloads, and operational clarity.

  • • PostgreSQL, MySQL, SQL Server, MongoDB, DynamoDB
  • • Redis, BullMQ, RQ, and background workers

Core Area

03

Cloud & Delivery

Shipping backend systems across cloud environments with attention to rollout safety, observability, and deployment consistency.

  • • AWS, Azure, DigitalOcean, Docker, Linux
  • • GitHub Actions, CI/CD, Nginx, and IIS

Core Area

04

Payments & Integrations

Building dependable third-party integrations for billing, synchronization, and real-time product behavior.

  • • Paddle, Google in-app billing, bKash
  • • WooCommerce sync, CMS integrations, live monitoring flows

Skills

Core Strengths

Backend Engineering & Cloud Systems

Scalable APIs, data platforms, and reliable integrations built for performance and growth.

C#

Python

TypeScript

JavaScript

Rust

SQL

NestJS

FastAPI

ASP.NET Core

REST

GraphQL

PostgreSQL

MySQL

MS SQL

DynamoDB

MongoDB

Redis

BullMQ

RQ

Azure

AWS

DigitalOcean

Docker

Linux

Nginx

IIS

GitHub Actions

CI/CD

Distributed Systems

Microservices

Background Workers

Projects

01

SiteBeacon

Highlighted Work

Enterprise website auditing and monitoring platform for performance, accessibility, SEO, and sustainability.

Stack: NestJS, Python, PostgreSQL, Redis, distributed workers

  • • Architected distributed scanning workflows that scaled audit capacity from hundreds to 5,000+ URLs per scan.
  • • Implemented real-time progress tracking and automated failure recovery.
  • • Built backend services with NestJS and Python backed by PostgreSQL and Redis.
02

Spellman

Highlighted Work

Enterprise website built with Sitefinity CMS for content-managed pages and scalable publishing workflows.

Stack: ASP.NET Core 9, Sitefinity CMS 15, C#

  • • Implemented custom modules, widgets, and workflows beyond out-of-the-box CMS capabilities.
  • • Delivered end-to-end CMS customization with a maintainable architecture.
  • • Optimized performance for enterprise content delivery.
03

PMS

Highlighted Work

Modernized a legacy Excel-based performance management system into a Windows client, web portal, and shared Web API.

Stack: ASP.NET Core 8, SQL Server, Windows Forms, web portal

  • • Built a Windows application in C# .NET for operational users handling photo retouching workflows.
  • • Developed a Next.js web admin panel for project oversight, reporting, and management tasks.
  • • Implemented ASP.NET Core Web API services with SQL Server to support 100+ concurrent active users.
  • • Tracked time spent on each user's work to monitor productivity and deadline-based editing operations.
04

Retoucher Of the Year

Highlighted Work

Multi-country championship platform where retouchers participate in photo editing contests through a modern content-driven web experience.

Stack: Payload CMS, Next.js, Stripe, PostgreSQL, contest platform

  • • Built the frontend experience in Next.js for contest discovery, participation, and event content.
  • • Used Payload CMS with PostgreSQL to manage competition content, country-specific updates, and platform administration.
  • • Integrated Stripe payments to support participant registration and related contest transactions.
  • • Delivered a platform tailored to photo editing competitions for retouchers across multiple countries.
05

Point Of Sell

Highlighted Work

Web-based POS system with courier integrations, inventory sync, and WooCommerce order/product synchronization.

Stack: Laravel, PHP, MySQL, Python, third-party integrations

  • • Integrated courier services for streamlined fulfillment.
  • • Synced product and order data with WooCommerce.
  • • Delivered backend tasks in Python for reliability.
06

Nafs AI

Highlighted Work

AI chatbot app (10k+ installs) with a crediting system that boosted in-app purchases and revenue.

Stack: ASP.NET Core, AWS Lambda, DynamoDB, MariaDB, GPT-3.5, in-app billing

  • • Implemented crediting system that improved in-app revenue.
  • • Built on ASP.NET Core with AWS Lambda services.
  • • Integrated Google in-app purchases and bKash payments.
  • • Managed data with DynamoDB and MariaDB.
07

Fowl Play Live

Highlighted Work

Live streaming platform with secure crypto transactions and performance-focused backend services.

Stack: Azure Live Streaming, Azure Functions, secure payments, serverless

  • • Integrated Azure Live Streaming and serverless processing.
  • • Designed secure crypto transactions and crediting flow.
  • • Used Azure Data services for secure storage.
08

iHope

Highlighted Work

Medical app backend that enables digital prescriptions, operator workflows, and faster access to nearby facilities.

Stack: .NET Core Web API, SQL Server, Windows Service, workflow automation

  • • Led backend development for digital prescription flows.
  • • Built APIs and Windows Service integrations.
  • • Improved operator workflows and patient access.

Experience

Lead Software Engineer

NAFS Technologies
Jan 2023 - Present
  • Build and maintain scalable backend systems with NestJS, FastAPI, and ASP.NET Core, improving performance and reducing downtime.
  • Manage PostgreSQL, MySQL, SQL Server, Cosmos DB, and Azure DB with Redis-based caching and queuing to reduce latency.
  • Lead a cross-functional team through Agile delivery, CI/CD pipelines, and Git-based collaboration.

Software Engineer

Prime Tech Solutions Ltd
Nov 2021 - Jan 2023
  • Developed scalable web applications using ASP.NET Core Web API, MVC, SQL Server, and MySQL.
  • Designed layered architectures with caching and third-party integrations to optimize performance.
  • Solved complex business logic with design patterns and algorithms, improving system reliability.

Education

AIUB logo

B.Sc. in Computer Science and Engineering

American International University-Bangladesh
Jan 2018 - May 2022

Faculty of Science and Technology · CGPA: 3.60 / 4.00

Contact

Contact Details

For direct inquiries, use the information below or open the dedicated contact form page.

Open contact form
Email:shahariarfahim@gmail.com
Phone:+880 17-00815041
Location:Dhaka, Bangladesh
LinkedIn:linkedin.com/in/shahariarimtiazfahim
GitHub:github.com/Fahimzz
LeetCode:leetcode.com/u/Fahimzz