Md. Ashif Al Nowajesh, Developer in Dhaka, Dhaka Division, Bangladesh
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Md. Ashif Al Nowajesh

Verified Expert  in Engineering

Full-stack Developer

Dhaka, Dhaka Division, Bangladesh
Toptal Member Since
February 2, 2022

Ashif has been a professional software engineer for around six years, with experience in Node.js, JavaScript, C#, and C++. He has successfully worked with numerous organizations ranging from startups to enterprises from North America, Asia, and Europe. Ashif has worked across the entire development lifecycle and specializes in the back end. As an engineer, he possesses an outstanding problem-solving ability and is passionate about expanding his skills and building high-quality products.


MedGeo Ventures
Node.js, Amazon Web Services (AWS), PostgreSQL, Sequelize, Express.js...
Toptal Client
JavaScript, Node.js, Express.js, MongoDB, Stripe, RSS Feeds, XML, Mongoose...
Express.js, PostgreSQL, React, JavaScript, SQL, APIs, Full-stack...




Preferred Environment

Ubuntu, Windows 10, Visual Studio Code (VS Code)

The most amazing...

...thing I've developed is an AWS Lambda function that fetches scanned exam papers from an S3 bucket and extracts QR code information.

Work Experience

Senior Software Engineer

2022 - PRESENT
MedGeo Ventures
  • Led the creation of microservices architecture and communication protocol in collaboration with the CTO and Principal Architect.
  • Architected notification systems to deliver hourly job and site updates via email, user inbox messages, and real-time feed. Integrated Winston with Amazon CloudWatch for log management and observability.
  • Resolved compatibility challenges during Node.js and AWS SDK upgrades, ensuring a smooth transition and application integrity. Transformed Lambda functions to work with Application Load Balancer.
  • Enhanced application security by automating secret retrieval and environment variable population using AWS Secrets Manager. Integrated AWS AppConfig to dynamically set up feature flags at runtime.
  • Accelerated API performance by 98% through database lookup optimization, and reduced average response from 17.5 seconds to 0.35 seconds. Delivered a seamless user experience by reducing API latency through Redis cache implementation.
  • Implemented APIs to store, fetch, update, and remove image data to S3 bucket. Incorporated unit testing into the development workflow using Jest and Supertest.
  • Created middleware to support role-based authentication for APIs using the Amazon Cognito user pool.
Technologies: Node.js, Amazon Web Services (AWS), PostgreSQL, Sequelize, Express.js, AWS DevOps, Serverless, Amazon Simple Notification Service (Amazon SNS), Amazon Simple Queue Service (SQS), SendinBlue, Brevo, AWS AppConfig, AWS Cognito, Amazon OpenSearch, Amazon Aurora, Amazon Cognito User Pools, Amazon Cognito, Amazon RDS, Relational Database Services (RDS), PostGIS, AWS Lambda, Lambda Functions, Redis, Redis Cache, Amazon API Gateway, Amazon CloudWatch, AWS Fargate, AWS IAM, AWS Secrets Manager, Amazon S3 (AWS S3), Jest, SuperTest, Winston, SQL, JavaScript

Software Engineer

2022 - 2022
Toptal Client
  • Created a REST API and webhooks to accept Stripe payments using credit and debit cards, Bancontact, etc.
  • Developed a back-end module to publish job campaigns and retrieve metadata and live statistics through the VONQ marketplace.
  • Implemented an RSS feed REST endpoint for most recent job postings.
Technologies: JavaScript, Node.js, Express.js, MongoDB, Stripe, RSS Feeds, XML, Mongoose, Axios, REST APIs, Back-end, API Integration, Web Development, Integration, SaaS, NoSQL, Back-end Development, Webhooks, Payment Processing, Stripe API, Amazon CloudWatch, AWS Secrets Manager, Microservices, Sequelize, PostgreSQL

Full-stack Developer

2021 - 2022
  • Developed RESTful APIs with Express.js for an eCommerce application to support product management wish list functionalities.
  • Implemented role-based user authentication with JSON Web Token and bcrypt and developed authentication middleware.
  • Created a full-stack restaurant rating web application from scratch using Express.js, React, and PostgreSQL for users to submit ratings and comments.
  • Developed GraphQL endpoint with Apollo Server to fetch, add, and update products, categories, comments, etc.
Technologies: Express.js, PostgreSQL, React, JavaScript, SQL, APIs, Full-stack, RESTful Services, REST, MongoDB, REST APIs, Mongoose, GraphQL, Apollo Server, Web Development, Security, Back-end, NoSQL, Sequelize

Senior Software Engineer

2020 - 2021
Enosis Solutions
  • Optimized the execution time of the Excel PDF file exporter program for the grid data by 50%.
  • Implemented a custom algorithm for dynamic column width allocation of material-table in real time based on the API provided ratio.
  • Mentored new engineers by providing domain knowledge and technical information about the project.
  • Wrote plugins for Siemens NX, CATIA, and MATLAB. Replaced deprecated APIs with the latest ones.
  • Implemented features to asynchronously read and update Excel named ranges, and run Excel macros.
Technologies: Angular, JavaScript, TypeScript, C#, .NET, NUnit, Windows Presentation Foundation (WPF), HTML5, CSS, API Integration, Back-end

Software Engineer L2

2019 - 2020
Enosis Solutions
  • Implemented RESTful APIs to support exam management, generate reports, and submit assessments.
  • Created and deployed an AWS Lambda function to download the PDF file of scanned exam papers from the AWS S3 bucket and extract QR code information using C++ and Dynamsoft Barcode Reader SDK.
  • Designed an event bus using an npm hertzy module to handle assessment submission events and send email notifications to users using Amazon Simple Notification Service (SNS).
  • Implemented RESTful microservices to query user data from the Jira Software Server using Jira Query Language (JQL) script and generate a report.
  • Wrote a behavior-driven test to implement APIs and features using a Mocha test framework, Chai Assertion Library, and Sinon.JS to test fakes, spies, stubs, and mocks.
  • Developed an API to create and fetch conference rooms in the Twilio video service. Created a webhook for Twilio video events to save the event information in the AWS S3 bucket.
  • Enhanced an API to remove a user image from Cloudinary server and content delivery networks (CDNs) after processing.
  • Upgraded project's Node.js version from 6.2 to 12.13, Hapi.js version from 15.1 to 19.1, and other npm modules. Fixed all the broken features and failing tests caused by the migration.
Technologies: Node.js, Hapi.js, PostgreSQL, Mocha, AWS Lambda, Amazon S3 (AWS S3), Amazon Simple Notification Service (Amazon SNS), C++, SQL, Microservices, RESTful Microservices, Sequelize, RESTful Services, REST, Serverless, APIs, Amazon Web Services (AWS), REST APIs, API Integration, Integration, Web Development, Security, Back-end, Docker, SaaS, API Development

Software Engineer L1

2018 - 2019
Enosis Solutions
  • Designed a module from a sketch to control servo-motors through a user datagram protocol (UDP) connection used to move the X-ray machine horizontally.
  • Created a controller unit for a relay board, which manages the X-ray shutter and vertical movement of the X-ray system. The controller unit communicates with relay-boards via a serial communication port.
  • Developed real-time data visualization functionality for two X-ray machines and servo motors. Achieved smooth user experience by managing each device with separate threads.
  • Integrated a remote request listener module in the background thread. A remote user can set parameters and run-stop analysis by sending user datagram protocol (UDP) text commands through this module.
Technologies: C#, .NET, Windows Forms (WinForms), Back-end, Integration

Remote Educational Service

This remote educational platform is based on Node.js microservices architecture. As the back-end developer, I implemented REST APIs and back-end services to support exam management, report generation, and assessment submission. Also, I mentored junior engineers by providing domain knowledge and technical information about the project.

Kitchen Equipment Monitoring Dashboard

This monitoring dashboard for kitchen equipment was designed with Angular. As a front-end team member, I enhanced the existing dashboard features, created new components, and optimized the performance of the file exporter program for the grid data by 50%.

Data Modeling Desktop App

This desktop application processes different types of data models and visualizes results. I've successfully rewritten features for Excel, Siemens NX, CATIA, and MATLAB plugins and replaced deprecated APIs with the latest ones.

Industrial X-ray Machine Controller

This fully-featured Windows desktop application controls and manages industrial X-Ray machines. I developed the real-time movement controller modules and data visualization functionalities using C# and .NET.

Online Shop

This online shop is based on Node.js. As the back-end developer, I implemented REST APIs with Express.js and MongoDB to support user authentication with JSON Web Token (JWT), product management, and wish list functionalities.

Medical Record Management System

A C#, .NET Core-based web application to manage medical records. I improved the search performance by up to 40% by rewriting the scalar-valued (database) function in the repository layer. I also implemented a module for sequential unique patient ID generation in a thread-safe way.

Social Blogging Site

As a back-end engineer of this microblogging site, I worked on the GraphQL endpoint and implemented modules to support Query, GraphQL mutation of blog posts, and comments using TypeScript, Node.js, Apollo Server, Prisma ORM, and MySQL, among others.


JavaScript, SQL, GraphQL, TypeScript, C#, C++, HTML, HTML5, SCSS, CSS, XML


Express.js, JSON Web Tokens (JWT), Jest, .NET, Hapi.js, Angular, NUnit, Windows Presentation Foundation (WPF), Material UI, .NET Core


Node.js, REST APIs, API Development, Stripe, Twilio API, Stripe API, Winston, React, Windows Forms (WinForms), ODBC


Sequelize, GitHub, Amazon CloudWatch, SendinBlue, Mocha, Amazon Simple Notification Service (Amazon SNS), Mongoose, Prisma, AWS IAM, Amazon Simple Queue Service (SQS), SuperTest, Amazon OpenSearch, Amazon Cognito, AWS Fargate


Microservices, REST, Testing


Visual Studio Code (VS Code), AWS Lambda, Ubuntu, Amazon Web Services (AWS), Docker


PostgreSQL, Amazon S3 (AWS S3), MongoDB, MySQL, JSON, NoSQL, Redis Cache, Redis, Amazon Aurora, PostGIS


ACM Problem Solving, Algorithms, Data Structures, APIs, RESTful Microservices, RESTful Services, Back-end, API Integration, Integration, Web Development, Back-end Development, Lambda Functions, AWS Secrets Manager, Brevo, Windows 10, Full-stack, Serverless, Front-end, RSS Feeds, Axios, Apollo Server, Security, SaaS, Webhooks, Identity & Access Management (IAM), AWS AppConfig, Relational Database Services (RDS), Amazon API Gateway, Payment Processing, CI/CD Pipelines, AWS DevOps, AWS Cognito, Amazon Cognito User Pools, Amazon RDS

2013 - 2017

Bachelor's Degree in Computer Science and Engineering

University of Dhaka - Dhaka, Bangladesh

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