Hello, I am
Viththiyaharan
Arulanantham
A results-driven Software Engineer and Shopify Developer with 4+ years of experience delivering eCommerce platforms, automation systems, and scalable web applications. Skilled in Liquid, JavaScript, Python, React, and API integrations, I build reliable, high-performance solutions that improve business efficiency and user experience. I have worked with international teams across Europe and Asia, contributing to robotics support operations, workflow automation, and custom software development while ensuring quality, maintainability, and timely delivery.
Portfolios
Selected work
Sustainability & Transparency (Shopify)
Designed and developed an app-free, fully dynamic sustainability and transparency section for a Germany-based Shopify store aligned with EU regulatory and environmental compliance requirements. Implemented the solution using native Liquid, metafields, and customizable theme blocks to allow non-technical teams to manage content without developer dependency. Focused on performance optimization by minimizing external scripts and reducing render overhead, which improved page speed and mobile responsiveness. The architecture was built for long-term maintainability, enabling future updates, localization, and expansion of sustainability data while preserving brand consistency and accessibility standards.
Online Clinic Appointment Website
Developed a full-stack appointment system with a React frontend and Python backend, including patient booking flow and admin management dashboard.
Smart Home Mobile App
Developed a smart home mobile application that allows users to securely control and monitor home devices such as lights, fan speed, air-conditioning settings, and door access from a single interface. Implemented user authentication and session handling to ensure only authorized users can access device controls. Designed a device management module to add, remove, and configure connected devices, including real-time status updates and control actions through API integrations. Focused on usability and reliability by building a clean UI flow, handling network failures gracefully, and ensuring responsive performance across different mobile screen sizes.
Experience
Deep responsibilities & impactFreelancing Shopify Developer — 3D Scout GmbH (Remote)
Build and maintain Shopify stores for international clients, converting business requirements into clean, scalable Shopify implementations (Liquid + custom sections) with strong UX and performance.
- Theme customization: Build and modify themes, sections, and blocks to match brand and conversion goals.
- Liquid & UI enhancements: Implement template logic, improve layouts, and add JavaScript interactions without breaking theme structure.
- App integrations: Integrate and configure third-party apps and ensure store flows are stable and user-friendly.
- Performance optimization: Improve speed, responsiveness, and mobile UX by reducing heavy assets/scripts and optimizing layouts.
- Ongoing maintenance: Bug fixes, upgrades, new features, and long-term support while keeping downtime minimal.
Support Engineer — SESTO Robotics, Singapore (Remote)
Support robotics operations by monitoring task execution, documenting incidents, and helping engineering teams reduce recurring issues.
- Real-time monitoring: Track live robotic tasks and respond quickly to anomalies or failures.
- Incident documentation: Log issues in Google Sheets with clear reproduction details and timestamps.
- Log analysis: Review operational logs to identify patterns and repeated failures.
- Continuous improvement: Share evidence to help teams optimize stability and reduce downtime.
Software Engineer — Maha Clean, France (Remote)
Delivered Python automation to reduce manual work and improve accuracy in restaurant workflows.
- Automation: Python scripts to auto-update checkout dates into Excel workflows.
- Invitations: Automated client invitation sending process to reduce manual follow-ups.
Associate Software Engineer — Zelora Pvt.Ltd
Contributed to AGV control and automation software, supporting feature delivery, testing, and stability.
- Automation modules: Built and enhanced modules to meet client requirements.
- Server improvements: Enhanced server functionality for reliability and performance.
- Delivery support: Assisted with testing, deployment, and maintenance of automation systems.