Software Engineer | Full Stack Developer | AI Engineer

Hi I'm Harshaadhithya Kalaikumar

A Software Engineer based in United States. I build scalable, real-world solutions with expertise in backend engineering, AI-driven features, and full-stack development.

A small selection of recent projects

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HappyFox AI

An AI-powered add-on for the HappyFox helpdesk SaaS product. HappyFox AI automates customer support by resolving user queries automatically using Retrieval-Augmented Generation (RAG), significantly reducing the need for human customer agents.

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Demo Link

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Auxel

An AI-Powered Natural Language system that enables blind and visually impaired (BVI) users to perform data analysis without coding. It processes natural language commands to execute analytical tasks with 85% accuracy, enhancing accessibility in STEM fields.

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Demo Link

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Fractal Algo Trading

Converts traders’ exclusive strategies into executable algorithms for proprietary trading and hedge funds. Enables automated execution with cron jobs, real-time alerts, and asset screening, optimizing performance and profitability.

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Github

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Joni Solutions

A beautifully designed digital marketing landing page with a built-in CMS, allowing dynamic SEO updates, CRUD operations for services, blogs, and products, plus integrated enquiry email handling.

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Check Live Site

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PPD TalkBot

A voice-based AI counselor that predicts postpartum depression risk by analyzing symptoms. Provides personalized guidance and actionable steps using voice, tailored to user conversations, location, and demographics.

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Demo Link

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Admissions KCT

Developed the official admissions portal for my UG college, streamlining the admission process for UG, PG and diploma programs, serving over 40,000 students. Integrated payment gateway, online entrance exam API, and admin interface with push notifications.

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Check Live Site

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TeqtaShop - Ecommerce Application

Developed an e-commerce website for a client selling USB-C hubs. The platform offers a seamless shopping experience, secure payment gateway, and real-time order tracking, enabling efficient product browsing and customer support.

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Demo Link

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Check-in KCT

Developed the official KCT hostel portal, supporting 12,000+ hostel students and staff. The system integrates biometric entry, manages outpass approvals and facilitates a lending system for sports equipment, with penalties for late returns deducted from student accounts.

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Check Live Site

My Professional Experience

Research Assistant (AI/ML Engineer) logo
Research Assistant (AI/ML Engineer) logo

Research Assistant (AI/ML Engineer)

HDI Research Group, Northeastern University

Oct 2024 - Present

Leading a software development team to create a natural language system that enables blind and visually impaired (BVI) users to perform advanced data analysis in STEM fields without requiring coding skills.

Designed and deployed a custom AI agent capable of executing data analysis tasks through natural language commands, achieving 85% task accuracy in initial testing.

Developed the system as a full-stack web application, containerized using Docker, and deployed on AWS for scalability and accessibility.

Ensured real-world usability by integrating cloud deployment for easy access and scalability.

Backend Engineer (Full Time) logo
Backend Engineer (Full Time) logo

Backend Engineer (Full Time)

HappyFox

Feb 2024 – Aug 2024

Core member of the HappyFox AI team, building AI-driven features for a scalable SaaS helpdesk using Django, collaborating with cross-functional teams, utilizing continuous deployment (CI/CD) pipelines, and leveraging Git for workflows.

Designed and deployed the AI-Answer feature, an advanced Retrieval-Augmented Generation (RAG) system, that autonomously resolves user queries using knowledge base articles and historical ticket data, resulting in a 45% increase in ticket deflection and significantly reducing the need for human agent intervention.

Developed an AI-powered KB Draft Recommendation system that automatically analyzes repetitive tickets to generate draft KB articles, accelerating publication time by 40% and reducing recurring queries by 30%.

Enhanced Search and Retrieval Systems by integrating semantic search with AWS Elasticsearch and text embeddings, boosting response accuracy and search efficiency.

Boosted Agent Productivity by 70% through the AI Auto-Complete feature. Fine-tuned a large language model (LLM) to provide real-time, context-aware text suggestions in ticket replies, significantly reducing agent typing time.

Backend Engineer (Intern) logo
Backend Engineer (Intern) logo

Backend Engineer (Intern)

HappyFox

July 2023 – Jan 2024 (Converted to Full Time)

Developed an internal web app for seamless data migration from other helpdesks to HappyFox using Django, REST APIs, Celery, Redis, and PostgreSQL. Improved migration reliability and reduced time by implementing efficient background tasks.

Built an internal application for analyzing subscription data, using ClickHouse to process large volumes of data and extract key metrics like Monthly Recurring Revenue (MRR) from HappyFox’s payment gateway.

Based on my performance, I was converted from an intern to a full-time Backend Engineer, further contributing to HappyFox’s AI-driven features and SaaS solutions.

Quantitative and Full-stack Developer logo
Quantitative and Full-stack Developer logo

Quantitative and Full-stack Developer

Fuzionest Private Limited

Jan 2023 – Jul 2023

Collaborated with the quants team to convert trading strategies into executable algorithms, enabling automated execution based on user-defined cron jobs. This improved execution speed by 90% and boosted profits by 50%.

Worked directly with clients to adjust and fine-tune trading strategies, adapting to their dynamic needs and proving an increase in profit through tailored solutions.

Led the development of the algorithmic trading platform, including system design, database architecture, and development using Django Rest Framework and ReactJS. Ensured efficient execution and real-time trade alerts for automated strategies.

Integrated push notifications into the platform to send real-time trade alerts, ensuring that clients stay informed of critical trading events promptly.

Leveraging cutting-edge technologies to create innovative solutions

Frontend

HTMLHTML
CSSCSS
JavaScriptJavaScript
React.jsReact.js
Tailwind CSSTailwind CSS
BootstrapBootstrap
AceternityAceternity
Material UIMaterial UI

Backend

PythonPython
DjangoDjango
Django REST FrameworkDjango REST Framework
Node.jsNode.js
PostgreSQLPostgreSQL
MySQLMySQL
SQLite3SQLite3

Tools & Cloud

DockerDocker
GitGit
NGINXNGINX
AWS BedrockAWS Bedrock
AWS Elastic SearchAWS Elastic Search
AWS EC2AWS EC2
CeleryCelery
RedisRedis

AI/ML

LangChainLangChain
LangGraphLangGraph
LLMsLLMs
PandasPandas
NumPyNumPy
scikit-learnscikit-learn

Hear from my colleagues and mentors

  • Sharon Samuel profile
    Sharon Samuel
    Senior HR Manager, HappyFox
    I highly recommend Harsha, who joined our company as a fresher and quickly became an invaluable asset. He is an exceptionally smart individual, contributing to critical AI projects with innovative solutions. Despite being an introvert, his impact has been significant and respected by the entire team. Congratulations on your acceptance into the Master’s in Computer Science program — I can’t wait to see all the great things you will achieve!
    LinkedIn
  • Barath C profile
    Barath C
    Senior Backend Engineer, HappyFox
    Harsha is a fast learner, who can pick up things and work through it effectively. He is very good in AI/ML and has a lot of interest in learning new stuffs. He is really good at communicating and also has a knack of writing good documentation. Overall he’s a passionate developer who loves to code and learn new things everyday.
    LinkedIn
  • Hari Kishan TK profile
    Hari Kishan TK
    Backend Engineer, HappyFox
    I've had the pleasure of working with Harsha, and I can confidently attest that he's an exceptional developer. His curiosity about the inner workings of software, ability to plan effectively, and awareness of resource constraints make him stand out. His outstanding work on the AI Answer project is a testament to his expertise, showcasing his ability to craft innovative software that exceeds expectations.
    LinkedIn
HappyFox
Fuzionest
iQube
Joni Solutions

My Awards & Achievements

Let's get in Touch :)

Profile
Harshaadhithya Kalaikumar
Software Engineer
kalaikumar.h@northeastern.edu