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Sachith

Software Engineer & Technical Entrepreneur

Available for hire

Sachith Ariyathilaka

I turn ideas into shipping products - fintech infrastructure, national government platforms, US real estate tech. I write the code, design the system, and lead the team.

See My WorkLet's Talk
JavaSpring BootNode.jsTypeScriptReact.jsReact NativeAngularAWS LambdaPostgreSQLMongoDBDockerJenkins
Sachith Ariyathilaka

Lead Engineer · Zitles LLC, New York

~/sachith - zsh - production
  • ›whoami// lead eng · 7 companies · 3 countries
  • ›git log --oneline --decorate
  • a3f9c1efeat(zitles): ship US title platform full stack (web, mobile, desktop) to New York production
  • b7d2e4alead(dmt): national E-Motoring go-live for Sri Lanka DMT with an 8-engineer delivery team
  • c9a1b3fbuild(lolc): fintech + insurance suite across 8 customer-facing products at LOLC Finance
  • d4e5f6aremote(fr): Erasmus+ e-learning platform delivered for EU education partners from France

Core stack

JavaSpring BootNode.jsTypeScript
React.jsReact NativeAngularAWS Lambda
PostgreSQLMongoDBDockerJenkins

About

Engineer. Entrepreneur. Builder.

I'm a Lead Software Engineer and Technical Entrepreneur based in Sri Lanka, currently owning the full technical stack at Zitles LLC in New York. Serverless backend, React web, React Native mobile, Electron desktop. Part CTO, part principal engineer.

Six years across national government infrastructure, fintech for Sri Lanka's largest financial groups, insurance tech, an EU Erasmus+ platform for a French NGO, and now US real estate tech. Led teams of 8, handled production incidents at 2am, shipped features the next morning.

I write about what I build: 70+ articles on Medium covering Java, Spring Boot, AWS, and system design, because clear engineering notes help teams move faster than tribal knowledge alone.

“I care about systems that age well and products that actually work for the people using them.”

Own the full stack for a US title platform: serverless backend, React web, React Native mobile, and Electron desktop.

Explore

Experience

Where I've Built

Seven roles across Sri Lanka, France, and the United States.

  1. Jan 2025 - Present

    Live

    New York, USA · Remote

    Lead Software Engineer

    Zitles LLC

    Own the entire technical stack at a US real estate startup. Part CTO, part principal engineer - serverless backend, React web, React Native mobile, Electron desktop.

    • Architected fully serverless backend on AWS Lambda - zero servers, auto-scaling
    • Built Puppeteer pipeline for automated title data extraction from county records
    • React Native mobile + Electron desktop for offline field-agent workflows

    Stack

    Node.js
    TypeScript
    React.js
    MongoDB
    AWS Lambda
    Serverless
    Puppeteer
    Electron
    React Native

Stats

By the Numbers

Career counters and progression across products, companies, and markets.

Years Active

0+

Since Aug 2019

Projects Built

0+

Production & OSS
Companies

0

LK · FR · US

Products

0+

In production

Career Progression

2019 → Present

  1. Trainee

    2019 · 14mo

  2. Associate

    2020 · 5mo

  3. Engineer

    2021 · 12mo

  4. Senior SE

    2022 · 19mo

  5. Tech Lead

    2023 · 16mo

  6. Lead Engineer

    2025 · now

Industry Mix

  • Fintech28%
  • Insurance20%
  • Gov/Public18%
  • Real Estate14%
  • EU NGO/Web12%
  • Academic/ML8%

Stack Mix

  • Java/Spring30%
  • Node.js/TS22%
  • React/Angular18%
  • AWS/Cloud15%
  • Android8%
  • Other7%

Projects

Everything I've Built

40+ projects across 7 companies. All real. All production.

Zitles LLC

New York, USA

Real Estate TechLive

  • Zitles - Title Search Platform

    zitles.com

    Serverless title search platform for the US market. Web, mobile and desktop.

    Live in Production · New York, USA

    Node.jsTypeScriptReact.jsMongoDBAWS LambdaServerless

  • Title Data Scraping Pipeline

    Private

    Puppeteer pipeline extracting title data from county records at scale.

    Core Infrastructure · Zitles Platform

    Node.jsPuppeteerTypeScriptMongoDBAWS

  • Zitles Mobile

    App Store

    Cross-platform mobile app for field agents - live on the App Store and Google Play.

    Live on App Store & Google Play

    React NativeiOSAndroidTypeScript

  • Zitles Chrome Extension

    Web Store

    Published Chrome extension for in-browser title research on county record sites.

    Published · Chrome Web Store · React.js

    React.jsTypeScriptChrome Extension API

Millennium I.T.E.S.P.

Colombo, Sri Lanka

National ScaleLive

  • E-Motoring - Sri Lanka DMT

    Live

    National platform automating Sri Lanka's Dept. of Motor Traffic. Led 8 engineers + QA + BA to production.

    National Scale · Team of 8

    JavaJavaScriptPostgreSQLJasper ReportsJenkinsAWS

  • Ayati - Children's Hospital EMR

    ayati.lk

    Children's hospital EMR at Ragama Teaching Hospital. Led 5 engineers + PM + QA.

    Tech Lead · Team of 7 · ayati.lk

    JavaJavaScriptPostgreSQLJasper ReportsJenkinsAWS

Hatchyard Private Limited

Colombo, Sri Lanka

Fintech & SaaSLive

  • LOLC iPay - Payment Aggregator

    lolc.lk

    Payment aggregation for LOLC Finance. Multi-gateway, reconciliation, reporting.

    Live in Production · LOLC Finance Group

    JavaSpring BootMySQLOracleMicroservices

  • LOLC Lending Platform

    lolc.lk

    Loan lifecycle platform with ML credit risk scoring for LOLC Finance.

    Live in Production · LOLC Finance Group

    JavaSpring BootOracleLiquibaseReact.jsML

  • Hatchyard HRMS

    Private

    Internal HR platform for employee data, leave and recruitment.

    Internal SaaS · Used Across All Teams

    JavaSpring BootDockerJenkinsMySQLAWSOAuth

  • KoPark Smart Parking

    Private

    ML R&D for smart vehicle detection and parking management.

    ML R&D · Smart City Initiative

    Machine LearningPythonBitbucket

Surecore Private Limited

Colombo, Sri Lanka

Insurance TechLive

  • Surecore-General - Core Insurance

    surecore.co

    Team Lead. Core general insurance - policy, claims, renewals.

    Team Lead · Live at surecore.co

    JavaSpring BootAngularPostgreSQLOracle Cloud

  • Surecore-Online - Customer Portal

    surecore.co

    Team Lead. Customer portal for quotes and policy management.

    Team Lead · Live at surecore.co

    AngularJavaSpring BootPostgreSQL

  • Surecore-Life Insurance

    surecore.co

    Backend for Surecore Life insurance product suite.

    Live in Production · surecore.co

    JavaSpring BootPostgreSQLJasper Reports

  • Surecore-Medical Claims Portal

    surecore.co

    Medical insurance claim portal on AWS.

    Live in Production · surecore.co

    AngularJavaSpring BootPostgreSQLAWS

Cagliero Creative Solutions

Paris, France

NGO · RemoteLive

  • Erasmus+ E4FMA E-Learning Platform

    erasmus.dbima.fr

    EU Erasmus+ filmmaking e-learning platform for a French NGO. Full-stack delivery.

    Live · erasmus.dbima.fr

    JavaSpring BootAngularPostgreSQLJenkinsAWS

  • Cagliero Website & Dashboard

    cagliero.eu

    Public site and admin dashboard for cagliero.eu.

    Live · cagliero.eu

    JavaSpring BootAngularPostgreSQLAWS

MVV Information Technologies

Colombo, Sri Lanka

AutomationLive

  • CASAT - Vehicle Production

    Private

    Vehicle production automation. Assembly tracking and QC reporting.

    Live in Factory · MVV Information Technologies

    JavaSpring BootAngularJSPostgreSQL

Freelance & Open Source

Academic & Freelance

  • Digital Library System

    GitHub

    Cloud-native library management with cataloguing, borrowing and patron records. Fully serverless on AWS Lambda.

    Open Source · Freelance Project

    Node.jsReact.jsMongoDBAWS Lambda

  • SMS - Student Management System

    GitHub

    Mobile-based student management app built with Flutter frontend and Java Spring Boot backend.

    Open Source · Mobile + Backend

    FlutterJavaSpring BootREST API

  • Risk Predictor - Loan Risk ML

    GitHub

    Web app predicting bank loan risk by credit history using logistic regression machine learning.

    ML Research · Credit Risk Prediction

    PythonMachine LearningReact.jsFlask

  • Policy Predictor - Traffic ML

    GitHub

    ML model recommending road traffic policies based on historical traffic data analysis.

    ML Research · Traffic Policy

    PythonMachine LearningData ScienceReact.js

Skills

Tools I Use to Ship

Backend, frontend, cloud, data, and AI tooling I use in production.

Backend

Java
Spring Boot
Node.js
TypeScript
Nest.js
Kotlin
PHP
gRPC
WebSocket
Hibernate
Maven

Frontend & Mobile

React.js
React Native
Android
Angular
Electron
Flutter
Redux
JavaScript

Cloud & DevOps

AWS Lambda
Serverless FW
Docker
AWS S3
EC2
Oracle Cloud
Jenkins
Linux
GitLab
CI/CD

Data & Tools

PostgreSQL
MongoDB
MySQL
Oracle
Redis
Firebase
Liquibase
Jasper Reports
Puppeteer
Machine Learning

AI Tools

Claude Code
Cursor AI
GitHub Copilot
ChatGPT
Antigravity
v0
Bolt

Architecture & Lead

System Design
Microservices
Serverless
Team Leadership
Code Review
Mentoring
CI/CD Strategy
Production Ops

Writing

Technical Writing

70+ articles on real problems from real projects. Published on Medium.

See All 70+ Articles on Medium

Education

Academic Foundation

BSc (Hons) in Software Engineering

University of KelaniyaKelaniya, Sri Lanka

2017 - 2021 · 4 Years

Second Class

GPA 3.25

Four-year honours degree in Software Engineering with specialisations in Data Science, Mobile Development, and Web Development. Core modules covered software architecture, algorithms, data structures, databases, networks, and systems design. Final-year research project: ML-based traffic policy recommendation system using logistic regression on historical Sri Lanka traffic data.

Specialisations

Data ScienceMobile DevelopmentWeb Development

Contact

Let's Talk

Based in Sri Lanka, working remotely for US & EU clients - open to senior engineering roles, co-founder / CTO opportunities, consulting, and interesting technical problems.

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