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Availability: Available for new opportunities and freelance projects, on-site, hybrid or remote

Nadeera SilvaSoftware engineer building mobile, web and AI products.

I design, build and ship production mobile apps, web and SaaS products, and AI features end to end, using Flutter, React and Next.js, Node.js, Laravel and Spring Boot. I've been delivering client work since 2021.

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Selected work

Products and apps I've built

My own products, client work, and independent and academic projects. Each one has a short case study covering the problem, my role and the stack.

All 22 projects
Pactroom landing page: 'Where project work actually happens.' above a project room with conversation, tasks and Project AI panels
Own productWeb

Own SaaS · early development

Pactroom

Private project workspace with a project-aware AI

A private, multi-person workspace for each project: chat, files, tasks and decisions in one place, with an AI assistant that answers only from the project's own messages and files and cites its sources.

  • Projects with members and invitations by email or link
  • Real-time chat with replies, attachments, search and live updates
  • Tasks with status, priority, due dates and assignees
Read case study
  • FilmyBox web app home screen showing a Top 10 row of movie posters on a dark interface
    Client workMobile2026

    FilmyBox

    Movie & web-series streaming platform

    Production movie and web-series streaming platform with subscription plans, multi-gateway payments and native iOS StoreKit integration.

    • Flutter
    • Swift / StoreKit
    • PHP / Laravel
    • Firebase
    Read case study
  • Illustrated cover for Recipians: a phone outline connected to a PHP/MySQL backend and admin panel
    Client workMobile

    Recipians

    Production Flutter app with PHP/MySQL backend

    Maintained a client's production Flutter app with a PHP/MySQL backend and admin panel, covering debugging, security hardening, token-based authentication and in-app purchase billing.

    • Flutter
    • PHP
    • MySQL
    • In-App Purchases
    Read case study
  • Illustrated cover for Your Health AI: a phone outline with an AI chat conversation
    IndependentAI / ML

    Your Health AI

    Flutter health assistant

    A Flutter health assistant app using Supabase for data, the OpenAI API for the assistant and OneSignal for notifications.

    • Flutter
    • Supabase
    • OpenAI API
    • OneSignal
    Read case study
  • Illustrated cover for POS SaaS: a browser window with a product grid, receipt and service blocks
    IndependentWeb

    POS SaaS

    Point-of-sale system on Spring Boot microservices

    A point-of-sale system built as Java Spring Boot microservices with REST APIs and Docker.

    • Java
    • Spring Boot
    • Microservices
    • REST APIs
    Read case study
  • Illustrated cover for the Train Tracking IoT System: a GPS device linked to a phone map
    AcademicMobile

    Train Tracking IoT System

    Live train location with ESP32 + GPS

    ESP32/Arduino with a NEO-6M GPS module sending live location to a MySQL-backed API, with a React Native passenger app.

    • ESP32 / Arduino
    • NEO-6M GPS
    • MySQL
    • REST API
    Read case study
  • Illustrated cover for Drive Smart: a phone outline with a QR code and a list of fines
    AcademicMobile2024

    Drive Smart

    Traffic violation & fine payment apps

    Dual mobile apps for police officers and drivers to record violations, scan QR codes, and process fines.

    • React Native
    • Node.js
    • Express
    • Firebase
    Read case study

About & skills

End to end, from app to API to cloud

I'm a software engineer based in Colombo, Sri Lanka. Since September 2021 I've worked remotely with clients through NX Dev Solutions, Fiverr and direct referrals, shipping production mobile apps, web and SaaS products, payment integrations and AI features for people in the US, Morocco, the Bahamas and elsewhere.

I work across the whole stack: Flutter and React Native apps, React and Next.js front ends, Node.js, Laravel and Spring Boot backends, Firebase, Supabase and SQL databases, and deployments on AWS and Docker. I'm also building my own product, Pactroom. It's a private project workspace built with TanStack Start, Fastify and PostgreSQL with pgvector, and its AI assistant answers questions from the project's own content, with citations.

More about me

  • Mobile

    • Flutter / Dart
    • React Native / Expo
    • Swift / StoreKit
    • In-App Purchases
    • Firebase Auth
    • Google & Apple Sign-In
    • OneSignal
    • AdMob
    • Google Maps
    • App Store & Play Store releases

  • Web & Backend

    • React
    • Next.js
    • TypeScript
    • JavaScript
    • Node.js / Express
    • Fastify
    • TanStack Start / Router / Query
    • Tailwind CSS
    • Socket.IO (real-time)
    • PHP / Laravel
    • Java / Spring Boot (microservices)
    • Python
    • REST APIs

  • Data

    • MySQL
    • PostgreSQL
    • pgvector
    • Prisma
    • MongoDB
    • Firebase / Firestore
    • Supabase
    • Redis

  • AI & Automation

    • LLM API integration (OpenAI, Gemini, OpenRouter)
    • RAG with embeddings (pgvector)
    • Vercel AI SDK
    • AI agents
    • Prompt engineering
    • n8n workflow automation
    • Webhooks
    • AI-assisted coding (Cursor)

  • Cloud & DevOps

    • AWS (ECS Fargate, ECR, S3, CloudFront, Lambda, API Gateway, Cognito)
    • Docker
    • Linux
    • Git / GitHub
    • CI/CD (GitHub Actions)
    • Google Cloud VMs, nginx, systemd
    • Testing (Vitest, Testing Library)

  • Payments, Games & E-commerce

    • Stripe
    • PayPal
    • Razorpay
    • PayHere
    • StoreKit / Google Play billing
    • Unity 3D (C#)
    • Shopify customization

Experience & education

Where I've worked and studied

Experience

  1. Sep 2021 to present

    Freelance Software Engineer

    NX Dev Solutions / Fiverr / direct clients · Remote

    I run NX Dev Solutions (nxdevsolutions.com), my remote freelance practice. I take mobile apps, web and SaaS products, AI automation and payment integrations from first idea to production release.

    • Level 1 Fiverr seller: 25 completed orders with a 5.0/5 rating and repeat clients in the US and Morocco.
    • Recipians (client): maintained a production Flutter app with a PHP/MySQL backend and admin panel, covering debugging, security hardening, token-based authentication and in-app purchase billing.
    • Built n8n workflow automations for clients, and integrated payment gateways (Stripe, Razorpay, PayHere) and push notifications.
    • Shipped client apps to the App Store and Google Play, and supported them after release.

  2. Oct 2022 to Mar 2025

    Software Engineering Intern

    ePedia Pvt Ltd · Katunayake, Sri Lanka (Hybrid)

    Worked on games, e-commerce and mobile apps for client-facing products.

    • Developed Unity 3D games in C#, improving gameplay, interactivity and the overall player experience.
    • Customized Shopify stores to fit each client's needs and simplify their e-commerce workflows.
    • Integrated payment gateways with a focus on secure, reliable transactions.
    • Built mobile apps with Flutter and native iOS and Android.

Education

  • BSc (Hons) Software Engineering

    2:1

    Cardiff Metropolitan University (via ICBT Campus), Sri Lanka

    Jun 2025 to Jul 2026

  • Computer Software Engineering

    NIBM, Sri Lanka

    2021 to 2025

Certifications

  • Android Application Development

    Great Learning

    Nov 2024

  • Software Engineer Intern

    HackerRank

    Oct 2024

  • Introduction to iOS Mobile Application Development

    Meta

    Jun 2024

  • Software Engineer

    HackerRank

    May 2024

  • Frontend Developer (React)

    HackerRank

    May 2024

  • Responsive Web Design

    freeCodeCamp

    May 2024

  • Scientific Computing with Python

    freeCodeCamp

    May 2024

Client feedback

What clients say

Verified Fiverr reviews · 5.0/5 rating across 25 completed orders.

Fiverr profile

  • “The best he goes above and beyond. And actually takes pride in the projects.”

    polarribrandsRepeat Client · United States · Fiverr review

  • “This Unity developer demonstrates impressive technical mastery, delivering smooth, optimized, and visually polished games. Hardworking, creative, and responsive, they turn ideas into engaging gameplay experiences while consistently meeting deadlines.”

    aladintruckRepeat Client · Morocco · Fiverr review

  • “I am very impressed with the developer's work! This is my second order, and I am still delighted and amazed by their attention to detail and the high-quality results they consistently deliver.”

    aladintruckRepeat Client · Morocco · Fiverr review

  • “he is the best developer, hands down. true legend. Why on fivver, should be working Microsoft.”

    thegreatesteverRepeat Client · United States · Fiverr review

  • “Excellent web developer! The work was completed perfectly, on time, and with great professionalism. Communication was smooth from start to finish, and all my requests were handled with precision. The final result exceeded my expectations: clean, functional, and very well optimized. I highly recommend this developer to anyone looking for someone serious, skilled, and efficient. I won’t hesitate to come back for future projects.”

    aladintruckRepeat Client · Morocco · Fiverr review

  • “This is my go to guy when in any pinch on any level. Always working with him!!”

    polarribrandsRepeat Client · United States · Fiverr review

Freelance services

Need something built or fixed?

I take on freelance work through NX Dev Solutions and Fiverr, from new apps to integrations and bug fixes.

All services

  • 01

    Mobile App Development

    I build production-ready mobile apps for startups and product teams. Flutter is my default, and I use native iOS, native Android or React Native when your stack calls for it. You get clean architecture, a polished UI and help getting through App Store and Play Store review, wherever you are.

  • 02

    Web & SaaS Development

    I design and ship modern web products, from marketing sites and admin dashboards to multi-tenant SaaS. I use TypeScript, Next.js and Node backends, with production-ready authentication, billing and hosting.

  • 03

    AI Agents & Automation

    I integrate LLMs and automation into real products: support agents that hand off to a human, internal operations bots, custom chat interfaces and workflow automations connected to your APIs and CRM.

  • 04

    Payment & API Integrations

    I build reliable payment flows into your product: Stripe checkout and subscriptions, PayPal, StoreKit and Google Play billing, webhook handling, entitlements and custom third-party API integrations.

Writing

Latest from the blog

All posts

Let's build something useful together.

Whether you're hiring or have a project in mind, tell me a little about it and I'll get back to you.

Hiring for your team?

I bring full-stack, mobile and AI experience from real shipped products. I can work on-site in Colombo, hybrid or remote, and I'm available to start right away.

Hire me Download CV

Have a freelance project?

Mobile apps, web and SaaS products, AI features, payments or bug fixes, scoped clearly and delivered remotely.

Start a project Fiverr

Or email info@nxdevsolutions.com