Work History
Upwork
Januray 2025 - present
- LLM & RAG Specialist | LangChain | AI Workflow Automation (N8N)
- As a Data & AI Specialist with a strong full-stack background, I’ve designed and deployed scalable solutions across data pipelines, LLM-powered applications, and automation workflows.
- Built Retrieval-Augmented Generation (RAG) systems using LangChain, vector databases (Pinecone, FAISS), and OpenAI GPT-4
- Automated business processes using n8n, Retell AI, and Google Workspace integrations
- Developed end-to-end GenAI apps for legal intake, customer support, and lead qualification with voice & chat agents
- Architected and maintained data pipelines for analytics, reporting, and AI training using Python, PostgreSQL, and Google Sheets
- Integrated full-stack systems using Next.js, Node.js, Supabase, and REST APIs for production-ready AI tools
- Passionate about building intelligent, efficient, and user-friendly solutions that solve real business problems with AI.
Subhub
May 2024 - January 2025
Generative AI & Full Stack Developer
- Developed AI-driven solutions for Subhub using LangChain, PineconeDB, and LangFlow, enabling advanced NLP workflows and RAG systems.
- Built real-time applications with Supabase and PostgreSQL, leveraging Realtime for seamless data sync.
- Integrated Twilio for SMS notifications and Eleven Labs for voice capabilities, enhancing user engagement.
- Designed scalable solutions with Python, Next.js, and Supabase, translating business needs into robust APIs and real-time insights.
Anekonnect Incorporated
August 2019 – February 2021
Full Stack Developer
- Experience with Front-end JavaScript frameworks like React, React Native, Next.js, NodeJS. And with the creation of RESTful Web service.
- Used Ant Design, React.js and Node.js in effective web design.
- Worked with the Middleware using Redux-Thunk, Redux-Saga, Redux-Logger, and Universal React Redux. Expertise in Reacts framework to develop the SPA.
- Built professional relationships with team and clients to help speed communication and attain project results.
- Modified existing software systems to enhance performance and add new features. Used Agile/Scrum development methodology and maintained Scrum-related information in Rally.
- Designed and developed forward-thinking systems that meet user needs and improve productivity.
- Developed complex SQL queries, Stored Procedures, Functions, and Packages, along with performing DDL and DML operations on the database
BREAKER NATION
November 2020 – Feb 2022
Full Stack Engineer
- Worked on building out the static UI and adding dynamic attributes to large automotive applications. Created custom Push Notifications, RESTful APIs, and interactions using ReactNative-Camera.
- Refactored error message handling design by implementing React Native alert dialog resulting in the potential decrease of user input errors by 44%. Worked with the Middleware using Redux-Thunk, Redux-Saga, Redux-Logger, and Universal React
- Redux. Expertise in Reacts framework to develop the SPA.
- Deployed application to the Google Play Store and Apple Store.
- Involved in creating, Debugging, and testing web services.
- Lead team in the adoption of React-Native best practices.
- Hands-on UML-compliant high-level design with data flow diagrams, Class Diagrams, Sequence Diagrams, Activity Diagrams, and Use Cases and documentation for peer developers.
- Refactored the app’s navigation from the ground up using React Navigation to replicate native interactions. Rebuilt from scratch major feature components to improve performance and clean up code.
Vircadia
November 2021 – August 2022
- Created smart contracts using solidity programming.Involved in DAPP development using HTML, Java Script, and Node.js and interact with Ethereum Blockchain by using Web3 JS API.
- Developed methods for accurate and simultaneous rendering of heterogeneous and multiresolution meshes without visual artifacts through the application of a Biva Visibility Test (patent pending) o Worked on Mindbenders WebGL engine, and performed optimizations on both Virtual Texturing and rendering passes.
- Obj/3DS files with Blender & Converting into CTM/FBX Loader. 3D Graphics Programming, WebGL, OpenGL, Web Graphics (Canvas/Svg).
- Three.js, Fabric.js, 2D & 3D Graphics Rendering Works Editing of Glass panels and resizing were done using Three.js, Babylon.js, 2D & 3D Graphics Rendering Works.
- Designing and presenting interactive sessions about Bitcoin and Ethereum protocols and presented them to different agencies.
Crewfare.com
August 2022 – Apr 2023
- Worked for writing API and Web Services in Node.js. Good knowledge in developing web
applications and implementing Model View Control (MVC) architecture using server-less
applications with Node.js, AWS Serverless Framework. - Changed Redux action s to Promises and Lifecycle Methods to asynchronous functions using ES7
async await to manage Reacts level state better and cut Redux container development time by
80%. - Built features for 100,000+ users through CSS3, Flexbox, Storybook, React Navigation, Layout
Animated, and Animated API in response to user scroll and click events too. - Implemented APIs with AWS Lambda and Serverless Framework in Node.js
- Built Gulp process to watch all the new typescript code changes converted into ES6 format for
recent browsers. - Did proof of concept work for deploying the in-house application to the AWS cloud using AWS
services, in particular EC2 and RDS. - Worked for developing applications using amazon web services like EC2, Cloud Search, Elastic
Load balancer ELB, S3, and CloudFront.
Most Loved Workplace
May 2023 - December 2023
Machine Learning Engineer
- Worked for Text Analytics, developing different Statistical Machine Learning, Data Mining solutions to various business problems and generating data visualizations using Python.
- Worked for transforming business requirements into analytical models, designing algorithms, building models, developing data mining and reporting solutions that scale across a massive volume of structured and unstructured data.
- Implemented machine learning algorithms on large datasets to understand hidden patterns and capture insights.
Education
2010 - 2015
BSc Mechanical Engineering
KUET
I studied Mechanical Engineering at Khulna University of Engineering & Technology. But I realized that my true passion lies in software engineering, a field that I couldn't fully explore within the confines of my university curriculum. I had an overwhelming desire to immerse myself in the world of software development and acquire practical skills that would enable me to bring my ideas to life. For that over the past 8 years, I have dedicated myself to an intensive self-study program, which has allowed me to delve into various programming languages, development frameworks, and software engineering principles. I have been fortunate to access a wealth of online resources, engage in coding projects, and collaborate with other passionate individuals within the software engineering community. This journey has not only broadened my technical expertise but also strengthened my problem-solving and critical thinking abilities.
2010
H.S.C
Govt. Azizul Haque College, Bogra
I got my H.S.C at A.H.C Bogra.
Certifications
Generative AI Essentials: A Comprehensive Introduction
Coursera: IBM
Introduction to Software Engineering
Coursera: IBM
Introduction to DevOps
Coursera: IBM
Developing AI Applications with Python and Flask
Coursera: IBM
Front-End Web UI Frameworks and Tools: Bootstrap 4
Coursera: The Hong Kong University of Science and Technology
Front-End Web Development with React
Coursera: The Hong Kong University of Science and Technology
Multiplatform Mobile App Development with React Native
Coursera: The Hong Kong University of Science and Technology
Server-side Development with NodeJS, Express and MongoDB
Coursera: The Hong Kong University of Science and Technology
Front-End JavaScript Frameworks: Angular
Coursera: The Hong Kong University of Science and Technology
Programming for Everybody (Getting Started with Python)
Coursera:University of Michigan
Python Data Structures
Coursera:University of Michigan
Using Databases with Python
Coursera:University of Michigan
Using Python to Access Web Data
Coursera:University of Michigan
Data Sceince Certificate Program
Ostad.app
Write Professional Emails in English
Coursera: Georgia Institute of Technology
Speak English Professionally: In Person, Online &On the Phone
Coursera: Georgia Institute of Technology
Data Science & AI SKILLS
Jupyter Notebook
Numpy
Pandas
Matplotlib
scikit-learn
Seaborn
TensorFlow
OpenAI
SQL
Linear Regression
Logistic Regression
Decision Trees
Support Vector Machines (SVM)
k-Nearest Neighbors (k-NN)
Naive Bayes
Principal Component Analysis (PCA)
k-Means Clustering
Artificial Neural Networks (ANN)
Convolutional Neural Networks (CNN)
Recurrent Neural Networks (RNN)
Tokenization
Stemming
LLM
LangChain
N8N
Retell AI
GoHighLevel
ChatBot Development
Agent Development
Data Engineering
Data Analysis
FRONT-END SKILLS
Javascript
Typescript
Next.js
three.js
BACK-END SKILLS
Nodejs
FastAPI
Flask
Django
Serverless Framework
DEVOPS SKILLS
CI/CD
Docker
Kubernetes
GCP
AWS
Testimonials
Bhabin Shah
Co-Founder/ Anekonnect Incorporated
I have had the pleasure to work with Pankaj. He has a very positive and professional approach to work. His dedication and participation in projects has guided Anekonnect from a wiring diagram application to a full-blown drawing and design application. His unwavering committment to meeting project timelines and excellent communication skills ensured that all the members of the team delivered on time. Pankaj has a bright future in the software industry and I wish him the very best. I'd be happy to answer more extensive reference requests if needed.
Ankit Kumar
Building Affairs Ace | Partner at Dhmics Technologies | Engineering with Crewfare
Pankaj is not only technically skilled but also an excellent communicator. He has an eye for detail and can translate complex technical concepts into simple terms that everyone can understand. His ability to work collaboratively with other team members made him an invaluable asset to our team.I would highly recommend Pankaj to any organization seeking a skilled developer with a deep understanding of React.js, Node.js, Next.js, AWS, Serverless stack, and CSS. His strong work ethic, technical abilities, and collaborative approach make him an excellent addition to any team.
Sami Kallinen
Founder 8-bit-sheep
I highly recommend Pankaj as a skilled JavaScript, TypeScript, and React developer. He has a deep understanding of these technologies and consistently develops complex applications with efficiency and precision. Pankaj's expertise in React enables him to create user-friendly and dynamic interfaces. Having pair-coded with him for significant periods, he also collaborates effectively with other developers and stakeholders, making him a valuable addition to any project. Pankaj is passionate about delivering high-quality results, and his contributions will undoubtedly add value to any team.
Charles Markovich
Starscraper.io
Pankaj has been a great help to the projects and has contributed many successful feature releases into the product. I would highly recommend him for any team to work with and is very patient and easy to work with. He was able to jump on multiple JS projects we have here and learn new skills as needed.
Marcelo Perezverdia
Upwork Client
Pankaj is a super contractor. Very professional with great communication. His skills are astounding, he always went above and beyond the task, always encouraging and pushing the team to work hard and stick to deadlines.
Ahmad Matyana
CO-Founder/ Alethea AI
Pankaj was really patient and understanding of our needs, and we felt very safe with working with him. He is very knowledgable and skilled, and was great at communication. The scope of our project changed so we had to pause our collaboration, looking forward to working with him again.
Gnanavel Madasamy
FOUNDER / Nivan Tech
Pankaj was a great co-worker and a friend. He has always had excellent services. I am so proud of I have him as my Developer.
Sujith Vellat
Upwork Client
Pankaj helped us develop some react based web pages in a very short time. He also put additional effort to help us resolve some issues that were happening for us only at our end to make sure our deadlines are met. He is one of the best rising talents out there here on up work. I will be very happy to work with him in future tasks.
Jonathan Pennington
Upwork Client
Pankaj is a high-skilled freelancer. He is very kind and has good communication. He always works with me sincerely. I will work with him always and I will provide long term project to him sooner. Thank you
Chris Thomas
Upwork Client
Pankaj Kumar Pramanik was a pleasure to work with. He asked all of the right questions to get the job completed in a timely manner.