01 / Introduction

Hi, I'm

Sivaraj Marimuthu

Full-Stack & Backend Software Engineer

I build complete web applications—from responsive interfaces and REST APIs to databases, automation and production deployment.

Available for freelance projects and full-time opportunitiesThanjavur, Tamil Nadu, India

02 / Selected work

Projects shaped around real operations.

Selected examples covering enterprise retail, point-of-sale operations, workflow automation and e-commerce.

Enterprise retail workflow with connected store operations and reportingRetail technologyCampaign · Store · Report

01

Retail technology

Enterprise Retail In-Shop Assistance Platform

A high-volume platform supporting in-store customer engagement, campaign workflows, membership capture, dashboards and reporting.

View case study
Game center billing, point-of-sale and session-tracking workflowBilling & POSSession · Billing · Closing

02

Billing & POS

Game Center Billing & POS System

A custom application for billing, PC and console session tracking, inventory, snack sales, expenses, employee access and daily closing.

View case study
Automated business workflow connecting data, processing and scheduled deliveryWorkflow automationInput · Process · Deliver

03

Workflow automation

Python Business Automation

Automation workflows for recurring reports, campaign processing, scheduled communication, file operations and database maintenance.

View case study
Grocery marketplace storefront, ordering, payment and delivery workflowE-commerceBrowse · Order · Verify

04

E-commerce

Grocery E-commerce Marketplace

A grocery marketplace connecting customers with local vendors through product, ordering, authentication and payment workflows.

View case study

03 / What I do

Engineering support from interface to production.

Services are defined by the outcome you need, with technology selected based on the project.

  1. 01

    Custom Full-Stack Web Application Development

    Complete business applications covering responsive interfaces, backend functionality, databases, authentication and integrations.

  2. 02

    Frontend Development & UI Integration

    Responsive interfaces, dashboards, forms and application workflows developed from provided designs or existing requirements.

  3. 03

    Backend API Development

    Structured REST APIs for authentication, business logic, data operations, reporting and frontend communication.

  4. 04

    Business Workflow Automation

    Automation for recurring reports, data processing, scheduled communication, file operations and database maintenance.

  5. 05

    Cloud Deployment & Production Support

    Application deployment, server configuration, environment management, web-server setup and production troubleshooting.

  6. 06

    Application Maintenance & Enhancements

    Production issue resolution, performance improvements, feature additions, API updates and ongoing application support.

Have a project or existing application that needs support?

Discuss your requirements

04 / Experience

Hands-on delivery across the stack.

  1. Mar 2020 – Dec 2021

    Navil Softwares

    Junior Full-Stack Developer

    Frontend and backend development, REST APIs, databases, authentication, payment integrations, client collaboration and production issue resolution.

  2. Feb 2022 – Jul 2023

    Saturam Infosystems

    Software Engineer

    Backend APIs, frontend integration, AWS deployment, workflow automation, production support and technical coordination.

  3. Independent · Project-based

    Independent Projects

    Freelance Software Engineer

    Billing and POS software, e-commerce administration, business applications and occasional Android work.

05 / Skills

Technologies used in delivered work.

01

Frontend

HTML5 · CSS3 · JavaScript · React · Angular · AngularJS · Bootstrap · Chart.js

02

Backend

Python · Flask · Node.js · Express.js · PHP · CodeIgniter

03

Databases

PostgreSQL · MySQL · MongoDB

04

Cloud & Production

AWS EC2 · S3 · RDS · IAM · Linux · Nginx · Gunicorn · PM2

06 / About

Turning business requirements into maintainable software.

I'm a full-stack and backend software engineer based in Thanjavur, Tamil Nadu, India. I build complete web applications for practical business requirements, covering responsive frontend development, backend APIs, database design, third-party integrations, automation and production deployment.

My experience includes enterprise retail platforms, e-commerce applications, billing and point-of-sale software, reporting workflows and internal business systems. I'm comfortable translating designs into responsive interfaces, integrating APIs and supporting production systems.

I'm open to freelance projects, contract work and full-time opportunities, with remote work preferred and on-site work considered based on the requirement.

Available for freelance, contract and full-time opportunities

07 / Contact

Have a project or opportunity in mind?

Tell me what you're building, what is currently blocking you and what a successful result should look like.