JoyOTP
An offline authenticator with TOTP, HOTP, and QR setup.
Explore JoyOTP ↗DEVELOPER · TECHNICAL ARCHITECT · MAKER
Big systems.
Everyday apps.
Built with care.
I’m Poovarasan Vasudevan. I turn complex problems into software people can use — from real-time enterprise platforms to the Android apps in your pocket.
JAVA / GO / RUST / ANDROID / AWS
Since 2015Building software professionally
9 published appsOn my Google Play developer page
10,000 req/sITSM API & centralized cache design
30+ peopleDevelopers & testers led
01 / INDEPENDENT PRODUCTS
From an idea.
To your home screen.
Apps I design, build, and publish independently. Practical tools, local experiences, and a little curiosity.
My Google Play collection ↗MORE PERSONAL PROJECTS
Small tools. Personal problems solved.
QR Scanner
A QR scanner and creator with custom colors and sharing, built with Jetpack Compose.
Explore QR Scanner ↗02 / ENGINEERING AT SCALE
Under the hood.
Beyond the screen.
Selected work at HTC Global Services: distributed systems, connected devices, and real-time communication.
01 / ENTERPRISE PLATFORM
Service Focus I & II
Modernizing IT service management with Go and React, event-driven services, GraphQL subscriptions, and distributed caching.
10krequests per second
API & cache architecture
API & cache architecture
02 / REAL-TIME COMMUNICATION
Service Focus Telephony
& DeskPhone
An Asterisk-based telephony platform and Electron desktop phone. Live call monitoring, queue management, WebRTC, and single sign-on for 300+ analysts.
03 / SYSTEMS PROGRAMMING
Service Focus Embedder
A lightweight Rust agent for hardware discovery and monitoring across servers, desktops, and containers, with serial-port communication and MQTT integration.
04 / CROSS-PLATFORM MOBILE
Service Focus Mobile
A multi-tenant ITSM app for incidents, service requests, and knowledge. Flutter with native bridges, enterprise SSO, and real-time push notifications.
05 / HEALTHCARE
St. Tammany Health Mobile
Appointments, ER wait times, doctor discovery, and hospital wayfinding. A shared Flutter experience with Swift and Kotlin integrations.
Earlier projects Commerce, publishing & mobile
MatchRX
Medicine ordering and vendor portals with Salesforce, shipping APIs, payment integrations, and a Java / Spring backend handling 10k+ orders a day.
Phoenix
A commerce and billing platform with Ruby on Rails, PostgreSQL, QR scanning, Square POS integration, and asynchronous transaction processing.
Spiritual Hierarchy Publication Trust
Publishing commerce, invoicing, subscriptions, and integrations with Salesforce and Tally.
Sahajvani
Mobile application development spanning requirements, interface design, APIs, and native platform integration.
03 / THE LONG GAME
A programmer
at heart.
I like understanding how things work — and then making them work better. Since starting my career in 2015, I’ve built across backend systems, web, mobile, desktop, and connected devices.
Today, I combine hands-on engineering with technical leadership at HTC Global Services. Outside enterprise work, I build apps that bring Tamil content to people and make everyday tasks a little easier.
EDUCATION
Bachelor of Information Technology
Arulmigu Meenakshi Amman College of Engineering
2010–2014
HTC GLOBAL SERVICES · CHENNAIRésumé ↗
AUG 2021 — PRESENT
Technical Architect
Leading 20+ developers and 10+ testers. Designing real-time platforms, telephony systems, and scalable APIs.
MAR 2018 — AUG 2021
Senior Software Engineer
Rebuilt quality-control and ITSM products, delivering $1M and $4M in annual savings respectively. Improved lab workflow efficiency by 40%.
FEB 2016 — MAR 2018
Software Engineer
Built communication and commerce products across web and mobile. Integrated UPI, PayPal, and Square payments.
FEB 2015 — MAR 2016
Programmer Analyst
Developed Java services and React interfaces, including a search improvement shipped to 2M+ users.
THE TOOLBOX
The right tools.
For the problem.
Languages & interfaces
Java · Go · Rust · Python · Kotlin · JavaScript · Dart · SQL · React · Flutter · Jetpack Compose
Systems & cloud
Spring Boot · AWS · Docker · Kubernetes · Kafka · Redis · GraphQL · Asterisk · WebRTC · MQTT
Data & delivery
PostgreSQL · MySQL · Oracle · SQLite · CI/CD · GitHub Actions · Jenkins · Prometheus · Grafana
04 / LET’S CONNECT