Vishwa Perera

Hi, my name isVishwa PereraI'm a Software Engineer"Simplicity Is Innovation"

Where I've Worked

Software Engineer · July 2023 — Present

Mississauga, Ontario, Canada

JavaFIX ProtocolLow-Latency SystemsExchange ConnectivityPythonShell ScriptingAngularTypeScript

Built robust protocol translation layers that seamlessly bridge FIX, binary, and cross-version FIX integrations, enabling effortless connectivity to global exchanges
Delivered low-latency, high-throughput connectivity solutions that unify message formats and optimize order and market-data flows across trading venues
Maintained and developed the front end of a data quality and controls app using Citi's standard UI library
Revamped the UI & constructed the API of a team hackathon project which was approved for further development

Full Stack Engineer · June 2021 - Aug 2022; Jan 2023 - June 2023

Toronto, Ontario, Canada

ReactTypeScript.NET CoreEntity FrameworkAzure DevOpsSQL

Routinely developed complex features on the front end with React/TypeScript and on the back end with .NET Core, C#, Entity Framework (ORM)
Experience using libraries such as Redux, Hangfire and SignalR
Assisted in Azure DevOps setup for CI/CD and bug tracking, closed 100+ bugs
Worked with a team of experienced developers to design a system dealing with large datasets and concurrency
Introduced best practices and methodologies that improved product definition and provided customization of applications to meet client needs
Wrote SQL stored procedures to optimize client app core feature performance from hours to seconds

Android budgeting app built with Jetpack Compose

AndroidJetpack ComposeKotlinOffline JSON storage

Pocket Flow keeps budgeting fully offline by persisting all user data as JSON in internal storage—no databases or network required.

Capture expenses with names, prices, categories, and dates
Flexible recurrences: daily, weekly (with weekday selection), monthly, and yearly—similar to calendar events
Overview screen that expands recurrences to summarize spend by week, month, year, and next year
Category management with default icons, add/edit/remove options, and safeguards when expenses exist
Category pie chart that visualizes spend distribution with percentages and icons
List view dedicated to recurring expenses for quick reviews