Viduranga Wijesooriya

• Lead implementation design discussions with product owners and developers to define new features and system enhancements.
• Identify performance bottlenecks and fragile code patterns in existing services and propose solutions to address them.
• Propose and carry out architecture and code-level design changes to improve system robustness, scalability, and performance.
• Lead the migration of critical business logic from Ruby to Go, implementing Temporal workflows to increase reliability and observability.
• Provide technical guidance and mentorship to junior and mid-level engineers, fostering a culture of quality and continuous learning.
• Collaborate with DevOps and platform teams to ensure system reliability, fault tolerance, and streamlined CI/CD pipelines.

Technologies - Ruby, Go, Kafka, Karafka, Sidekiq, Temporal, PostgreSQL, Redis, Docker, Nomad

• Worked with product managers, software engineers and testing engineers to design and develop robust, efficient and scalable solutions to meet client requirements in a microservices architecture.
• Designed a workflow system to provision and manage mobile subscribers while integrating with multiple telco providers such as T-Mobile and AT&T.
• Worked with the observability team by instrumenting the code with tracing and metrics.
• Utilized CI/CD pipelines for GitHub workflows and HashiCorp's Nomad orchestration system for application deployment.

Technologies - Ruby, Kafka, Karafka, PostgreSQL, Redis, Docker, Nomad

• Worked on two cloud applications; RoR based developer portal application hosted in Heroku and a Python based cloud API hosted in GKE.
• Revised, modularized, and updated old codebase according to Ruby on Rails best practices.
• Introduced methodologies and best practices to the software development team.
• Mentored junior developers on Ruby on Rails best practices, gems/tools.
• Designed and implemented a license manager to manage wrnchAI SDK licenses using Cryptlex service.
• Created a release management tool to ease the process of releasing wrnchAI SDKs.
• Designed and implemented a bulk file download feature using ZipTricks gem.
• Worked on SengGrid and Stripe integrations.
• Converted multiple sections of developer portal application to React.
• Improved API worker scaling by analyzing input data in the queue.

Technologies - Ruby on Rails, Python, Javascript, React, Docker, Kubernetes, RabbitMQ

• Worked on Entracer.com (a customer lifecycle optimization platform) as the Lead Engineer.
• Worked closely with project managers and developers to design and implement new features.
• Mentored junior developers on Ruby on Rails best practices.
• Worked with project managers, developers, quality assurance and customers to resolve technical issues.
• Designed and implemented an automation engine to automate customer enrichment workflows based on triggers.
• Implemented an advanced search engine using Elasticsearch.
• Added Sidekiq servers to run background jobs.
• Create a data synchronization tool to synchronize data with third-party services.
• Designed and developed APIs for mobile apps.
• Handled application deployment using Capistrano.

Technologies - Ruby on Rails, JavaScript, jQuery, React, PostgreSQL, MongoDB, Redis, Elasticsearch, Sidekiq, Capistrano, Nginx, Passenger.

• Project Hiveage (an online billing and invoicing SaaS application).
• Researched, designed and implemented new features based on the requirements given by the project manager.
• Implemented an advanced search engine using Elasticsearch.
• Added Sidekiq servers to run background jobs.
• Created a notification central to handle all types of notifications (created a gem).
• Integrated of multiple payments gateways (created custom activemerchant plugins).
• Made contributions to the Hiveage REST API.
• Handled application deployment using Capistrano.

• Project Vgo (a taxi dispatch system which was operated in Colombo, Sri Lanka).
• Implemented an interactive map/dashboard for taxi operators.
• Designed and developed APIs for mobile applications.
• Integrated multiple payment gateways.
• Handled application deployment using Capistrano.

Technologies - Ruby, Ruby on Rails, Web Sockets, JavaScript, React, JQuery, Backbone.js, PostgreSQL, MongoDB, Elasticsearch, Sidekiq, NodeJS, Capistrano, Nginx, Passenger.

• Mainly worked on Hiveage.com (an online billing and invoicing SaaS application).
• Implemented internationalization feature to support multiple languages.
• Integrated multiple payment gateways (created custom activemerchant plugins).

Technologies - Ruby, Ruby on Rails, JavaScript, JQuery, PostgreSQL

• Implemented a real-time server monitoring dashboard for Encyclopedia of Life organization through Google Summer of Code 2015 program.

Technologies - Ruby, Sinatra, HTML, CSS, Javascript, Ajax

• Created a Android application to deploy Vesuvius (a PHP web application) on Android devices for Sahana Software Foundation through Google Summer of Code 2014 program.

Technologies - Java, Android SDK, PHP, HTML, CSS, Javascript