Open to new opportunities

Hi, I'm Harrish Dhaithya

I build

harrish — zsh — 80×24

About Me

I'm a Software Engineer currently pursuing my MSc in Computing with a major in Secure Software Engineering at Dublin City University. With more than 2 years of professional experience at Zoho Corporation, I've developed expertise in building scalable enterprise solutions, optimizing system performance, and solving complex technical challenges.

My technical journey spans from developing high-performance backend systems to implementing security-focused solutions. I'm passionate about clean code, system architecture, and leveraging modern technologies to create impactful software. I thrive in collaborative environments and enjoy tackling real-world problems with innovative solutions.

Security Focused

Performance Optimisation

Team Collaborator

Experience

MSc Computing (Secure Software Engineering)

Dublin City University

September 2025 to August 2026 | Dublin, Ireland

  • Relevant Coursework: Cryptography, Secure Programming, Blockchain, Network Security, Concurrent Programming

Member Technical Staff

Zoho Corporation (ManageEngine)

June 2023 – July 2025 | Chennai, India

  • Collaborated on a high-impact team initiative to migrate enterprise reporting modules from Exchange Online PowerShell to Graph API, resulting in an 80% performance improvement for data-intensive workflows
  • Took ownership of the product's usability enhancements, improving data presentation for nested data and reducing the number of clicks in frequent operations
  • Improved the trade-off between memory usage across all modules by implementing a fixed-size thread pool in the high-memory-consuming module, reducing downtime for enterprise customers
  • Implemented an LRU-based caching technique to reduce database read operations during high volume data collection process
  • Took ownership of multiple releases by resolving blocking issues and coordinating with peer developers, senior engineers, and external teams to streamline the release process
  • Diagnosed and resolved real-world customer issues, gaining hands-on experience with production systems, edge cases, and failure scenarios

Project Trainee

Zoho Corporation (ManageEngine)

Sep 2022 – May 2023 | Chennai, India

  • Engineered a web-based email traffic generator using Exchange Web Service to simulate massive enterprise-scale workloads, utilizing configurable concurrency and thread-pool management
  • Built a REST API-based collection utility to gather message trace from Exchange Online and integrate with Email Traffic Generator
  • Evaluated Microsoft 365 data collection tools (Exchange Online Module, Graph API, Office 365 Management API) and conducted a feasibility analysis to migrate from high-latency to low-latency utilities, thereby improving product performance

Summer Intern

Zoho Corporation (ManageEngine)

Summer 2022 | Chennai, India

  • Engineered a comprehensive online banking application using an iterative development approach. Built an initial version as a console app, incorporated continuous feedback and upgraded it into a fully functional web-based banking platform
  • Collaborated closely with technical mentors while adopting best practices in software architecture, UI Design, and security of web applications

B.E. Computer Science and Engineering

Sri Ramakrishna Institute of Technology

Aug 2019 - June 2023 | Coimbatore, India

  • Relevant Coursework: Operating Systems, Computer Networks, Internet Programming, Distributed Systems, Cryptography

Featured Projects

Flight Ticket Booking System

Collaborative development project utilizing Agile methodology within the Software Quality Process course at DCU. Managed project lifecycle using Jira for user stories and Confluence for technical documentation. Architected CI/CD pipelines and development environments using Docker, Gradle, and GitHub Actions.

Java Spring Boot ReactJS PostgreSQL Gradle GitHub Actions

Linear Cryptanalysis of FEAL-4

Implemented a known-plaintext attack to recover subkeys from 200 ciphertext combinations. Optimized runtime by reducing the search space from 2³² to 2¹² × 2²⁰ by narrowing the search to the inner 12 bits and extending the solution to the outer 20 bits.

Java Cryptography Security Algorithm Optimization

Centralized Hotel Reservation System

Designed and architected a centralized hotel reservation system using a serverless architecture, focusing on scalability and cost efficiency. Led a 6-member team, coordinating system design and delegating implementation tasks to deliver a working prototype within tight timelines. (Virtusa Jatayu Hackathon)

Serverless AWS System Design Team Leadership

AI-Enabled Inventory Management Platform

Collaborated with a cross-functional team of 8 (employees, partners, customers, and students) to build an AI-enabled inventory management platform aimed at reducing food wastage for the charity FoodCloud. Contributed to solution design and implementation using cloud-native services to support social impact initiatives. (AWS Breaking Barriers Hackathon)

AWS AI/ML Cloud-Native Social Impact

Email Traffic Generator

Engineered a web-based email traffic generator using Exchange Web Service to simulate massive enterprise-scale workloads, utilizing configurable concurrency and thread-pool management. Built a REST API-based collection utility to gather message trace from Exchange Online.

Java REST API Exchange Web Service Concurrency

Online Banking Application

Engineered a comprehensive online banking application using an iterative development approach. Built an initial version as a console app, incorporated continuous feedback and upgraded it into a fully functional web-based banking platform with focus on security and best practices.

Java Web Development Security UI/UX

Technical Skills

Programming Languages

Java Python C/C++ SQL HTML/CSS JavaScript

Frontend Development

ReactJS Ember.js JSP/Servlets HTML/CSS

Backend & Architecture

Spring Boot REST APIs Object-Oriented Design Design Patterns Kafka RabbitMQ

Databases

PostgreSQL MySQL Elasticsearch

Cloud & DevOps

AWS Lambda API Gateway ECS/EKS Docker Jenkins Git

Security & Cryptography

Cryptography Secure Programming Blockchain Network Security

Tools & Technologies

IntelliJ IDEA Profiler Maven Gradle Unix/Linux Jira Confluence

Methodologies

Agile/Scrum CI/CD

Get In Touch

Want to build or scale a system?
Let's talk.

I'm currently pursuing my MSc at Dublin City University and open to new opportunities, collaborations, and interesting projects. Whether you have a question or just want to connect, feel free to reach out!