Md. Ashif Al Nowajesh
Verified Expert in Engineering
Full-stack Developer
Dhaka, Dhaka Division, Bangladesh
Toptal member since February 2, 2022
Ashif is a senior software engineer with over seven years of experience in Node.js, Python, JavaScript, and C++. He has worked with diverse organizations across North America, Asia, and Europe, from startups to enterprises. Specializing in back-end development, AI, and DevOps, Ashif excels across the entire software development lifecycle, combining deep problem-solving skills with a passion for delivering robust, high-quality products.
Portfolio
Experience
- Back-end - 7 years
- Node.js - 6 years
- APIs - 6 years
- Amazon Web Services (AWS) - 5 years
- PostgreSQL - 5 years
- Artificial Intelligence (AI) - 3 years
- Python - 3 years
- Google Cloud Platform (GCP) - 1 year
Availability
Preferred Environment
Agile Software Development, Artificial Intelligence (AI), Back-end, Databases, SQL, NoSQL, DevOps, Software as a Service (SaaS), Node.js, Python
The most amazing...
...things I've architected were scalable notification systems to deliver real-time job updates to thousands of users across email, in-app messaging, and feeds.
Work Experience
Senior AI Engineer
AI & ML Consulting
- Designed restaurant chatbots powered by retrieval augmented generation (RAG) using Flowise, LangChain, and Google’s generative AI models.
- Implemented sentiment analysis for user comments using LangChain and Mistral AI, integrating LangSmith tracing for improved observability.
- Created a back-end service with Python FastAPI, LlamaParse, Voyage AI, and Pinecone for intelligent legal document search.
- Developed and trained artificial neural network (ANN) models using TensorFlow, with data preprocessing and analysis performed using Pandas, Matplotlib, and Seaborn.
Senior Python Developer
Independent Contractor
- Architected scalable back-end service using FastAPI and PostgreSQL to support order management workflows.
- Orchestrated asynchronous job processing using Celery and RabbitMQ, with integrated real-time monitoring through Flower.
- Authored Terraform scripts to automate Amazon EC2 instance provisioning and DynamoDB table creation in AWS.
Senior Software Engineer
MedGeo Ventures
- Led the creation of 30+ microservices with Node.js and Express.js. Played a pivotal role in the successful delivery of the MVP in collaboration with the CTO and principal architect.
- Architected scalable notification systems that deliver timely updates to thousands of medical professionals via email, inbox messages, and real-time feed.
- Resolved compatibility challenges during Node.js and AWS SDK upgrades, ensuring a smooth transition and application integrity.
- 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 to 0.35 seconds. Delivered a seamless user experience by lowering API latency through Redis cache implementation.
- Implemented APIs to store, fetch, update, and remove image data to the Amazon 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. Integrated Winston with Amazon CloudWatch for log management and observability.
- Transformed Lambda functions to work with Application Load Balancer. Maintained an internal Node.js framework for AWS Lambda functions.
Senior Full-stack Developer
Freelance
- Developed RESTful APIs with Express.js for an eCommerce application to support product management and wish list functionalities. Implemented a GraphQL API with Apollo Server to fetch, add, and update products, categories, comments, etc.
- Implemented role-based user authentication with JSON Web Token (JWT) 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.
- Deployed FastAPI-based back-end services on Google Cloud Run. Provisioned and managed PostgreSQL database instances using Google Cloud SQL.
- Created a back-end module with Node.js and Google generative AI to extract key information from resumes and produce recruiter-friendly summaries.
- Configured GCP HTTP Load Balancer for API traffic distribution to a managed instance group. Developed a Cloud Run function using Google Sheets API and Pandas for document parsing.
- Established performance monitoring for Express.js and Flask microservices using OpenTelemetry, a Prometheus back end, and Grafana dashboards.
- Enabled real-time analysis of AIS data by building ksqlDB streams on a Confluent Cloud Kafka cluster.
- Developed backend services using Node.js, WebSocket, and Redis to enable real-time courier delivery tracking with responsive location updates.
Software Engineer
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.
Senior Software Engineer
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.
Software Engineer L2
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 Amazon S3 bucket.
- Enhanced an API to remove a user image from the 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.
Software Engineer L1
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.
Experience
Remote Educational Service
Kitchen Equipment Monitoring Dashboard
Data Modeling Desktop App
Real-time IIoT Controller for Industrial X-ray Machines
Online Shop
Medical Record Management System
Social Blogging Site
AI-powered Legal Document Retrieval System
Education
Bachelor's Degree in Computer Science and Engineering
University of Dhaka - Dhaka, Bangladesh
Skills
Libraries/APIs
Node.js, REST APIs, Stripe, API Development, Stripe API, Asyncio, SQLAlchemy, Twilio API, Winston, Jira REST API, Google API, Google APIs, React, Windows Forms (WinForms), ODBC, HubSpot API, OpenAI API, Google Sheets API, Pandas, Pydantic, TensorFlow, Google Maps, NumPy, Matplotlib
Tools
Sequelize, GitHub, Amazon CloudWatch, SendinBlue, Git, Jira, GitLab, Mocha, Amazon Simple Notification Service (SNS), Mongoose, Prisma, AWS IAM, Amazon Simple Queue Service (SQS), SuperTest, Celery, Docker Compose, RabbitMQ, Amazon OpenSearch, Amazon Cognito, AWS Fargate, Logstash, Google AI Platform, Amazon Elastic Container Service (ECS), Google Compute Engine (GCE), ksqlDB, Wireshark, Grafana, DeepSeek, Claude, GIS, Terraform, Seaborn, Auth0
Languages
JavaScript, SQL, GraphQL, Python, TypeScript, C#, C++, HTML, HTML5, XML, YAML, SCSS, CSS, Go, PHP, Python 3
Frameworks
Express.js, JSON Web Tokens (JWT), Jest, .NET, Hapi.js, LlamaIndex, Angular, NUnit, Windows Presentation Foundation (WPF), Material UI, .NET Core, Next.js, OAuth 2, Flask
Paradigms
Microservices, REST, Microservices Architecture, Agile Software Development, Test-driven Development (TDD), Unit Testing, Object-oriented Programming (OOP), Agile, Application Architecture, DevOps, Real-time Systems, Serverless Architecture, Event-driven Architecture, Scalable Application, Testing, HIPAA Compliance
Platforms
Ubuntu, Visual Studio Code (VS Code), AWS Lambda, Amazon Web Services (AWS), Docker, Google Cloud Platform (GCP), Kubernetes, Cloud Run, Linux, HubSpot, Heroku, Amazon EC2, Apache Kafka, Confluent, LangSmith
Storage
PostgreSQL, Amazon S3 (AWS S3), MongoDB, MySQL, NoSQL, JSON, Databases, Relational Databases, Redis, Redis Cache, Google Cloud, Google Cloud SQL, Google Cloud Storage, Amazon Aurora, PostGIS, Elasticsearch, Data Pipelines, Amazon DynamoDB
Other
ACM Problem Solving, Algorithms, Data Structures, APIs, RESTful Microservices, RESTful Services, Back-end, API Integration, Integration, Web Development, SaaS, Back-end Development, Lambda Functions, Payment Processing, AWS Secrets Manager, Brevo, Architecture, Software Architecture, Product Development, SaaS Product Management, Third-party APIs, Software, Code Review, FastAPI, RESTFul APIs, Software Design, Minimum Viable Product (MVP), Proof of Concept (POC), AI Integration, Data Processing, Software Engineering, Windows 10, Full-stack, Serverless, Front-end, RSS Feeds, Axios, Apollo Server, Security, Webhooks, Identity & Access Management (IAM), AWS DevOps, AWS AppConfig, Relational Database Services (RDS), Amazon API Gateway, Machine Learning, Artificial Intelligence (AI), Scalability, Startups, Leadership, Technical Leadership, Cloud, Real-time Data, Cloud Architecture, System Architecture, Flowise, LangChain, AI Agents, Generative Artificial Intelligence (GenAI), Vector Databases, Large Language Models (LLMs), ERD, Natural Language Processing (NLP), Pinecone, Voyage AI, Query Optimization, Payment APIs, AI Chatbots, Google Cloud Functions, Cloud Storage, Google Cloud Build, Image Processing, User Authentication, QR Codes, Data Analysis, Internet of Things (IoT), DevOps Engineer, Mistral AI, Data Engineering, AI Programming, Data Modeling, Solution Architecture, Distributed Architecture, Distributed Systems, WebSockets, CI/CD Pipelines, Amazon Cognito User Pools, Amazon RDS, Deep Learning, Stripe Payments, eCommerce, Data Visualization, Dashboards, Industrial Engineering, OpenAI, Gemini, Gemini API, GitHub Actions, Retrieval-augmented Generation (RAG), Prompt Engineering, Database Optimization, Load Balancers, Google Cloud Observability, Cyber Threat Hunting, Prometheus, OpenTelemetry, Industrial Internet of Things (IIoT), Geospatial Data, Sensor Data, Anthropic, Chatbots, Infrastructure as Code (IaC), Software as a Service (SaaS), Hugging Face, ECS, Single Sign-on (SSO)
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