Core Skills

Languages
JavaScript TypeScript PHP Python C#
Backend
Node.js Nest.js Express.js GraphQL Serverless .NET (Core)
AI Experience
RAG Systems OpenAI Personal Agents Recommendation Systems Multi Agent Chatting Systems MLOps
Data
AWS Redshift DBT Logstash Data warehouse DMS
Frontend
React Next.js Vue.js Svelte Redux
Cloud
AWS Azure GCP Docker Kubernetes Terraform
DB & Storage
MySQL PostgreSQL MongoDB DynamoDB CosmosDB VectorDB
Search
Redis Elasticsearch OpenSearch Algolia

Experience

Senior Software Engineer Apr 2025 – Present
Field Nation
  • Contributed to Field Nation Core PHP framework Mobile Apps.
  • Maintaining code related to existing bugs and platform stability.
  • Reduced Datadog monitoring costs by 30% by migrating from log-based ingestion to metric-based monitoring for key performance indicators.
  • Data Migration from Elasticsearch to OpenSearch.
  • Creating new data-platform for analytics and reporting.
  • Developing reusable data models for the AWS Redshift data warehouse using dbt.
Senior Full Stack Developer Aug 2022 – Mar 2025
Upsy Shopping Helper (YC startup), Finland
  • Served as a Team Lead for a few features.
  • Built a chatting system leveraging advanced RAG techniques based on diverse information sources using Python, FastAPI, Llama 3 70B model and OpenAI models.
  • Improved the product recommendation system using the Llama 3 70B model using nodejs, Llama model, AWS, Lambda.
  • Developed an A/B testing tool to evaluate the impact of our system in improving e-commerce sales.
  • Developed an RAG (Retrieval-Augmented Generation) system to enhance product recommendations and predict future purchase probabilities using Python, HuggingFace, VectorDatabase.
  • Develop and maintain Back-end API service on top of the AWS serverless architecture(lambda) using the serverless framework and Node.js engine capable of handling unlimited traffic.
  • Improved sales by 10% by changing widget design.
  • Reduced file size of a widget from 7kb to 5kb using Sveltejs for fast loading.
  • Develop and maintain our product handler service capable of fetching 500k products daily from feeds like MyCashFlow platform, Woocommerce, Shopify, Google Shopping Feed and Megento etc.
  • Developed Terraform code to automate AWS infrastructure provisioning, including subdomain creation, HTTPS certificate management, EC2 instance deployment, and DynamoDB table setup, enhancing deployment efficiency and consistency.
  • Implemented a daily job to collect data from multiple S3 buckets, analyze the data using AWS Athena, and query the most viewed FAQ questions, sorting them accordingly.
Full Stack Developer Mar 2022 – Jul 2022
Spring Rain Private Ltd, Bangladesh
  • Worked on a complex domain-driven microservice that searches and matches desired colleges for students from a database of 20+ colleges. Our technology stack included Node.js for the backend runtime and Gatsby.js for the frontend.
  • Collected & processed 1000+ leads per day using 45 active micro-services built using node.js.
  • Implemented location and image based e-commerce system capable of handling 1000 categories and 100k catalogs. Stack we used MERN.
  • Built a system to reduce hiring time by a factor of 10 by automated parsing and monitoring of resume. Stack we used MERN.
Software Engineer Jan 2020 – Feb 2022
Fusionread, Canada
  • I led my team of four members for around two years (Frontend+Backend+UI).
  • Designed a reading platform where users can read, write and search from millions of articles. We used Next.js for the Frontend Application and Python for Backend.
  • Developed a scraper that can collect data from 40+ reading and news portals daily in the background using multiple tools like Puppeteer, Redis Bull Queue, Mongodb, and Puppeteer Stealth etc. Stack we used MERN.
  • Adopted socket.io and improved real-time job processing to monitor (Failed and Success ratio). Stack we used MERN.
Software Engineer Jan 2019 – Dec 2019
DactarSheba, Bangladesh
  • Integrated audio and video calling able to handle 20 calls concurrently. Stack we used (MERN).
  • Enhanced real-time communication of parallel connections using socket.io. Stack we used (MERN).
  • Added a payment gateway(SSL commerce) for processing unlimited daily transactions

Contact Me