Sivapalan Mithushan | Full Stack Developer & Software Engineer

Sivapalan Mithushan
Available for Freelance & Contract Work
Sivapalan MithushanFull-Stack Engineer & Solutions Architect

Delivering production-grade web applications, POS software, and real-time operations dashboards using Next.js, React, Node.js, PostgreSQL, and Firebase. Transforming business workflows into secure, high-performing software that drives measurable client results.

View Selected Work→Explore ServicesDownload CV / LinkedIn ↗
25+Delivered Projects
10+Enterprise Platforms
100%On-Time Delivery
99.9%Code Reliability
ReactNext.jsTypeScriptTailwind CSSNode.jsPythonPostgreSQLMongoDBDockerAWSGraphQLFastAPIExpress.jsDjangoRedisCI/CDGitHTML5CSS3React NativeFlutterWebSocketsREST API
Sivapalan MithushanFull Stack DeveloperSoftware Engineer
Me at work
120%

Average client satisfaction increase through technical optimization.

About

Crafting Digital
Excellence.

I’m Sivapalan Mithushan, a Full Stack Developer focused on building scalable web, mobile, and business software. I’ve worked on online bidding platforms, project management tools, POS systems, inventory management software, delivery dashboards, merchant portals, and e-commerce solutions with payment integration. My experience includes Next.js, NestJS, Node.js, Express, PostgreSQL, Firebase, Supabase, React Native, and PHP/MySQL, with a strong focus on clean architecture, automation, and responsive user experiences. I enjoy turning complex business workflows into reliable software that helps companies operate more efficiently.

Location

Sri Lanka / Remote

Specialty

Full-Stack Web & Mobile Applications

Solutions

Engineering Services

Transforming business goals into production-grade web platforms, custom POS software, and real-time mobile applications.

💻Next.js 15 & Cloud

Custom Web & SaaS Engineering

High-performance web applications built for speed, conversion, and enterprise security using modern full-stack architectures.

Key Deliverables

  • ✓Next.js 15 App Router & React 19 architecture
  • ✓Robust PostgreSQL, Supabase & Firebase data layers
  • ✓Responsive glassmorphism UI with Tailwind CSS
  • ✓SEO metadata & JSON-LD schema optimization
🛒Retail & Hospitality

POS & E-Commerce Ecosystems

Unified commerce platforms connecting online storefronts with real-time in-store POS billing and automated stock sync.

Key Deliverables

  • ✓Real-time online & in-store inventory synchronization
  • ✓Instant billing, invoice generation & payment gateway integration
  • ✓Multi-branch product catalog & stock controls
  • ✓Customer accounts, discount rules & sales analytics
📊Real-time & RBAC

Enterprise Admin & Operations Dashboards

Centralized operational dashboards for managing merchants, riders, logistics, orders, and financial reports with live monitoring.

Key Deliverables

  • ✓Role-Based Access Control (RBAC) & fine-grained permissions
  • ✓Real-time order & fleet tracking with Socket.io & Google Maps
  • ✓Supplier collections, cheque lifecycle & expense tracking
  • ✓Background automation & scheduled tasks
📱Cross-Platform

Mobile App Development & APIs

Native-quality cross-platform mobile apps and resilient backend API infrastructures built for seamless scalability.

Key Deliverables

  • ✓React Native & Flutter cross-platform mobile applications
  • ✓Secure RESTful & GraphQL backend API development
  • ✓Payment Gateway (PayHere, Stripe) & SMS API integration
  • ✓Push notifications, real-time sync & offline caching
Expertise

Expertise Stack

A comprehensive set of tools and technologies I've mastered to deliver exceptional digital products.

Frontend Development

Next.js90%
React88%
TypeScript85%
Tailwind CSS90%

Backend Development

Node.js88%
Express.js86%
NestJS84%
REST APIs90%

Databases & Cloud

PostgreSQL88%
Firebase84%
Supabase82%
Database Design86%

Mobile & Integrations

React Native80%
Payment Gateways82%
SMS APIs78%
Role-Based Access84%

Tools & Deployment

Git & GitHub86%
Vercel84%
Docker72%
CI/CD75%
Career

Professional Journey

A track record of delivering high-impact solutions for world-class organizations and innovative startups.

Apr 2026 - Present

Freelance Full-Stack Developer

Freelance, Sri Lanka / Remote

Designing and delivering custom web and mobile software for clients across e-commerce, distribution, hospitality, education, and retail.

  • Built showcase websites and e-commerce platforms with responsive design and payment integration
  • Developed POS systems for different business types with secure user flows and practical admin tools
  • Created distribution management software to handle inventory, sales, and operational workflows
  • Delivered hotel management software tailored to client-specific business processes
  • Built educational and corporate websites for local and international clients
  • Implemented scalable solutions using modern full-stack technologies and cloud-based deployment
Next.jsReactNode.jsExpress.jsPostgreSQLFirebaseSupabase
Apr 2025 - Mar 2026

Full-Stack Software Developer

Accron Revolutions, Sri Lanka / Hybrid

Built and maintained production-grade delivery, POS, and merchant systems with a focus on scalability, automation, and real-time user experiences.

  • Developed admin and merchant dashboards for delivery and POS platforms using Next.js and TypeScript
  • Implemented role-based access control to secure administrative and merchant workflows
  • Built real-time order tracking and status updates with Socket.io
  • Designed delivery zone management tools with interactive map integration
  • Integrated PayHere payment gateway for subscription-based promotions and automated onboarding
  • Reviewed and refined AI-generated code to improve performance, security, and maintainability
Next.jsTypeScriptNode.jsPostgreSQLSocket.ioFirebase
Feb 2025 - Apr 2025

Full-Stack Developer

CoulfieEats, Sri Lanka / Onsite

Worked on inventory automation and internal tooling for multi-channel e-commerce operations.

  • Built an inventory management system integrated with Daraz and WooCommerce APIs
  • Implemented real-time stock synchronization across multiple sales channels
  • Designed optimized PostgreSQL schemas and trigger-based workflows
  • Developed internal dashboards to improve stock visibility and operational efficiency
ReactNode.jsPostgreSQLREST APIs
Aug 2024 - Feb 2025

Full-Stack Developer Intern

Accron Revolutions, Remote

Contributed to POS systems and internal dashboards while gaining hands-on production experience.

  • Built responsive UI components using Tailwind CSS and modern React patterns
  • Assisted in debugging and resolving production issues
  • Collaborated with senior developers on API improvements and feature development
ReactTailwind CSSNode.jsFirebase
Work

Selected Works

Pushing boundaries through code and design.

Top Tec — Full Stack Project by Sivapalan Mithushan
Web App

Unified e-commerce platform & in-store POS checkout system with real-time Supabase inventory sync, eliminating 100% of stock mismatches between online and retail storefronts.

View DetailsLive

Top Tec

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#Next.js#TypeScript#Supabase#POS System+2
Distribution Payment Management System — Full Stack Project by Sivapalan Mithushan
Enterprise System

Enterprise distribution platform replacing spreadsheet operations with automated multi-supplier ledgers, cheque status tracking, route dispatch logistics, and financial dashboards.

View Details

Distribution Payment Management System

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#Next.js#TypeScript#Supabase#PostgreSQL+2
MOTTOZ Admin Dashboard — Full Stack Project by Sivapalan Mithushan
Enterprise Platform

A production-ready admin dashboard and operations management system for a delivery platform, providing real-time visibility and centralized control over merchants, riders, customers, orders, and system configurations.

View Details

MOTTOZ Admin Dashboard

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#Next.js#TypeScript#PostgreSQL#Socket.io+2
PSTM Marketing Website — Full Stack Project by Sivapalan Mithushan
Marketing Website

A multi-page marketing and product catalog website for a wholesale distributor, featuring brand partners, searchable product listings, news updates, and Firestore-backed inquiries.

View DetailsLive

PSTM Marketing Website

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#Next.js#TypeScript#Firebase#Firestore+3
PSTM Admin Dashboard — Full Stack Project by Sivapalan Mithushan
Admin Dashboard

A secure admin dashboard for managing categories, companies, products, news, and customer enquiries with Firebase-backed CRUD and media uploads.

View Details

PSTM Admin Dashboard

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#Next.js#TypeScript#Firebase Auth#Firestore+3
Distribution & Cycle Management Platform — Full Stack Project by Sivapalan Mithushan
Business Automation

A customer-focused business management system for handling product purchasing, stock, customer cycle tracking, deliveries, payments, and automated order processing.

View Details

Distribution & Cycle Management Platform

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#Next.js#Firebase#Cloud Functions#Automation+2
POS Management System — Full Stack Project by Sivapalan Mithushan
Desktop / Business App

A flexible POS software platform for restaurant and retail businesses, built to manage sales, inventory, billing, reporting, and customer operations from one system.

View Details

POS Management System

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#Next.js#TypeScript#POS System#Admin Dashboard+2
MOTTOZ Merchant Dashboard — Full Stack Project by Sivapalan Mithushan
Enterprise Platform

A merchant-facing dashboard designed for multi-vendor delivery platforms, enabling merchants to manage orders, products, branches, promotions, and reports in real time without relying on platform administrators.

View Details

MOTTOZ Merchant Dashboard

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#Next.js#TypeScript#Socket.io#PostgreSQL+1
Acme Dashboard — Full Stack Project by Sivapalan Mithushan
Educational Project

An admin dashboard built while completing the official Next.js App Router course, showcasing authentication, invoice management, and revenue analytics using a Postgres-backed data layer.

View DetailsLive

Acme Dashboard

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#Next.js#React Server Components#Server Actions#TypeScript+3
View All Projects→
Credentials

Industry Credentials

Verified certifications from leading platforms and institutions.

Click on any certificate to view detailsCertificates open in full-screen view
Trust & Impact

Clients & Platform Partners

Proven track record of engineering reliable systems for distribution networks, retail platforms, and delivery ecosystems.

Trusted Platforms & Client Projects

Accron Revolutions
Top Tec
PSTM Marketing
CoulfieEats
MOTTOZ Platform
★★★★★

“Mithushan delivered our integrated POS and online store with zero stock discrepancies. The real-time inventory synchronization completely transformed our retail operations.”

Management Team

Retail & Education Platform — Top Tec

★★★★★

“Exceptional technical execution on our admin and merchant dashboards. Mithushan handled real-time Socket.io delivery tracking and complex role permissions effortlessly.”

Engineering Lead

Delivery Platform Systems — Accron Revolutions

★★★★★

“The distribution payment management system Mithushan engineered replaced all our spreadsheet workflows. Supplier collections, cheque lifecycles, and delivery routes are now fully automated.”

Operations Director

B2B Distribution — PSTM Marketing

100% Code Quality & Architecture GuaranteePost-Launch Technical Support Included
Contact

Got a Vision?
Let's Bring It to Life.

Whether you need a full custom web app, an integrated POS ecosystem, or enterprise technical architecture, I'm ready to build your solution. Select your service scope below for a fast response.

Socials & Portfolio

GitHub ↗LinkedIn ↗
Currently available for new freelance & contract work