Kandy, Sri Lanka

Hi, I’m Gihan Gunarathne

Full Stack Engineer with nearly 7 years of experience building SaaS, fintech, and AI products with Python, FastAPI, React, TypeScript, Java, and AWS.

Download Resume Watch app demos
Gihan Gunarathne

About

Email
eng.gihanc@gmail.com

Phone
+94 71 7455 776

Languages
Sinhala (Native)
English (Professional)

Full Stack Engineer

Python Developer

React Developer

I am a

Full Stack Software Engineer specializing in Python, FastAPI, Flask, React, and TypeScript, with strong Java and Spring Boot experience. I build SaaS and fintech products, pick up new tools quickly, and ship reliable systems across insurance, restaurant, and real estate domains.

  • Python
  • FastAPI
  • Flask
  • Java
  • Spring Boot
  • React
  • TypeScript
  • PostgreSQL
  • Docker
  • AWS
  • Azure
  • OpenAI
  • LangChain
React JavaScript TypeScript Flask Spring AWS Machine Learning Bootstrap PostgreSQL

Work Experience

Nearly 7 years across APIs, React frontends, AI integrations, and cloud deployments.

Uptime

Full Stack Engineer

Uptime · United Kingdom (Remote) · Nov 2025 – Present
  • Built Python FastAPI services for a ticketing platform used by 200+ users across the US, UK, and New Zealand.
  • Integrated Autotask with AI-based ticket scoring, Docker, GitHub Actions, and Azure App Service.
  • Implemented Partner Portal authentication, authorization, and 2FA.
UNIVISER

Senior Software Engineer

UNIVISER · Colombo, Sri Lanka · Jun 2023 – Oct 2025
  • Migrated a Laravel monolith to Java Spring Boot microservices for around 1,000 active clients.
  • Implemented multi-tenant architecture and AWS Cognito for user management.
  • Delivered React-facing REST APIs and mentored junior developers.
atlacarte

Software Engineer

atlacarte · London, United Kingdom (Remote) · Jun 2022 – Jul 2023
  • Built a modular Java backend integrating Oracle Simphony for POS and venue operations.
  • Created a Python Flask AI ordering assistant with OpenAI prompt engineering.
  • Deployed with Docker, AWS Elastic Beanstalk, Route 53, and CloudFront.
Bueno

Full Stack Engineer

Bueno · Miami, United States (Remote) · Jan 2020 – May 2022
  • Built Java Spring Boot APIs for hotel/tour data from 7+ GDS systems and Google Ads CRM.
  • Integrated SMS, payments, and bulk email for marketing and client outreach.
  • Shipped travel apps and landing pages with PHP, React, and Figma.

App Demos

Recent product walkthroughs. Videos play when they come into view.

Mycar

Vehicle platform with Individual, Collector, and Garage packages for service history and workshop operations.

Car app SaaS

Fingerprint Attendance

FP Dashboard for live attendance, leave requests, late/early KPIs, and team performance.

Fingerprint HR

GSIX Inventory

Inventory system for stock, sales, suppliers, and printable reports across stores.

Inventory Operations

BOC Portal

Loan document management app for collecting, reviewing, and tracking loan files.

Banking Documents

VIDA

Real estate platform with ML-driven unit pricing, documents, and client workflows.

Real estate AI
app.thereally.com

Crimsons Agri

Operations platform with AI automation for production, sales, and cost planning.

Agri Python
app.crimsonsagri.com

Selected Projects

AI platforms, open source, and research work from the current CV.

NPM package

rc-geographic

JavaScript utility for countries, states, cities, and coordinates. Published and maintained on NPM.

433downloads / month
4.3kdownloads / year
5.2k+total downloads
v1.0.9latest version
10releases
MITlicense
npm version weekly downloads monthly downloads total downloads install size Known Vulnerabilities
npmjs.com/rc-geographic · GitHub
AI chat

Orinec BoT

Lead capture and routing with a RAG pipeline. Built with Flask, LangChain, LlamaIndex, React, and Spring Boot.

RAG LangChain React
GeNet

GeNet

Gene-expression analysis, clustering, and prediction.

Python Flask
genet.orizel.com
See more work

Education

University of Peradeniya

BSc Engineering (Hons) in Computer Engineering

University of Peradeniya · GPA 3.25/4.0

Dec 2015 – Jul 2020

Kingswood College

G.C.E. Advanced Level

Kingswood College, Kandy · Z-Score 2.3968 · Island Rank 176

Jan 2003 – Jul 2014

Publications

Detection of Novel Biomarker Genes of Alzheimer’s Disease Using Gene Expression Data · IEEE