Lochana Ranaweera
An energetic, open-minded individual who is always on the lookout for opportunities to improve, currently working as a Senior Software Engineer at Klarna. A holder of a Bachelor of Science degree focused on Computer Science. Experienced in building software across the stack for highly available, high throughput fintech and eCommerce solutions.
Summary
- Senior Software Engineer with 8 years of experience in the software industry
- Holder of a B.Sc. Engineering degree (Hons) (First Class) from the Department of Computer Science and Engineering, University of Moratuwa, Sri Lanka and a CIMA Passed Finalist from the Chartered Institute of Management Accountants, United Kingdom
- Fluent in JavaScript & TypeScript based backend development using NodeJS, JavaEE and Spring Boot
- Fluent in frontend web technologies such as TypeScript, React Native, Redux & Redux Saga
- Fluent with cloud infrastructure management in the AWS stack and IaC principles
- Fluent in RDBMS principles and SQL
- Competent with CI/CD and experienced with Jenkins
- Worked through the entire Software Development Life Cycle (SDLC)
- Worked in the dynamic Agile Scrum environment within both Sprints and Kanban boards
- Experience in providing on-call support and incident management for high-impact systems
- Experience in carrying out knowledge transfer within the development team and refining requirements with the Product Owners
Skills
-
Programming Languages
JavaScript (ES6) / TypeScript Java SQL -
Technologies/Frameworks
NodeJS/ExpressJS AWS Infrastructure Management/IaC React/Redux RESTful API Design OIDC/OAuth2 flows Spring / Spring Boot -
Tools
Git QlikSense DataDog Jenkins Splunk / ChaosSearch Amplitude / Sentry
Publications
- Ranaweera, L.T., Vithanage, W.R.R., Prabodha, L.H.C., Dissanayake, D.M.M.A.I.B., & Ranathunga, S. (2017). Anomaly Detection in Complex Trading Systems. In 2017 Moratuwa Engineering Research Conference (MERCon) (pp. 437-442). https://doi.org/10.1109/MERCon.2017.7980524
- Prabodha, L.H.C., Vithanage, W.R.R., Ranaweera, L.T., Dissanayake, D.M.M.A.I.B., & Ranathunga, S. (2017). Monitoring Health of Large Scale Software Systems Using Drift Detection Techniques. In 2017 Conference on Complex, Intelligent, and Software Intensive Systems (CISIS) (pp. 152-163). https://doi.org/10.1007/978-3-319-61566-0_14
- Ranaweera, L.T. (2017). Fill in the Blanks - A Touch Data Gathering Game to Improve UI Designs. In 2016 CSE Research Symposium organized by the Department of Computer Science and Engineering of University of Moratuwa. (pp. 67-72). ISBN 978-955-9027-55-3
Experience
Senior Software Engineer
Currently working as a Senior Full Stack Engineer in the Login-Platform team.
- Working in a central solution for Klarna customers to sign-in and sign-up globally via OIDC
Senior Software Engineer
Worked as a Senior Full Stack Engineer in the User-Account-Management team.
- Worked on enabling Klarna customers to manage their personal information & settings by themselves
- Technical interviews, guiding and onboarding new team members
Software Engineer
Associate Technical Lead
Worked as a Full Stack Engineer on Sysco Shop - Sysco
Corp's eCommerce platform.
- Technical / architectural designs, code reviews, and implementation.
- Technical interviews, guiding and onboarding new team members
Senior Software Engineer
Software Engineer
Worked on new features and stabilizing Sysco Shop to enable the platform's GA release.
Software Engineer
Worked on the SGX Post Trade Solution - Phase 2 as a part of capital market/financial software development in an Agile environment.
Visiting Instructor
Department of Computer Science and Engineering, Faculty of Engineering.
For the module CS
2963 (Presentation Skills).
Software Engineering Intern
Projects
-
Login Platform
Nov 2023 - Present
Providing a secure, modern, standardized platform to sign-in/sign-up and manage consumer login sessions and drive the adoption of that platform to be the single way to login to Klarna. Currently it is used across multiple products owned by multiple teams globally.
Working as a Senior Full-Stack Engineer responsible for the delivery of features, from story mapping, refining, technical design to production deployment, performance testing and disaster recovery planning/testing.- Highly scalable and resilient microservice architecture
- Incident handling and on-call support
- Data-driven decision making
Technologies: TypeScript, JavaScript(ES6), React, NodeJS, Docker, Kafka, PostgreSQL, Ory HydraPlatforms/Tools: AWS, Jenkins, DataDog, Sentry, ChaosSearch, SentinelOne - Dataset, Amplitude, QlikSenseTesting: Jest, Cypress -
User Account Management
Jan 2021 - Nov 2023
Empowering consumers to seamlessly manage their accounts in one place, giving them the best sense of security, transparency and control while mitigating the risk of fraud.
Worked as a Senior Full-Stack Engineer with similar responsibilities as that of the Login Platform.- React-Native application with support for iOS, Android and Web (Klarna App)
Technologies: TypeScript, JavaScript(ES6), React Native, Redux, NodeJS, Docker, Kafka, PostgreSQLPlatforms/Tools: AWS, Jenkins, DataDog, Sentry, Splunk, ChaosSearch, Amplitude, QlikSenseTesting: Jest, Cypress, Appium, Visual/Storybook -
Sysco Shop
Oct 2018 – Jan 2021
Sysco Shop is the main ordering platform of the Sysco Corporation
This web ordering platform, handles orders worth billions of dollars per year. This high availability system was built from the ground up.
Worked as a Senior Software Engineer holding component ownership of several critical components in the ordering flow of Sysco Shop.Technologies: JavaScript, Java, ReactJS, Redux, NodeJS, Spring Boot,PostgreSQLPlatforms/Tools: AWS ECS, AWS CloudWatch, DynatraceConcepts: Microservices -
MillenniumIT SGX Post Trade Solution Phase 2
Apr 2017 – Sep 2018
Development of the Newclear Web FE framework in the MillenniumIT Post Trade Product, Millennium CSD. This is the new clearing, settlement and depository system for the Central Depository (Pte.) Limited of Singapore Stock Exchange (SGX).Technologies : Java SE, C++, Spring, Vaadin, Ehcache, Drools, MySQL, Scala, Gatling, JUnit -
Anomaly Detection in Complex Trading Systems
May 2016 – Mar 2017
The project presents a general framework for anomaly detection in the high-frequency trading domain based on a supervised learning approach. The framework enables deciphering of significant actionable information to prevent system outages that can deteriorate system availability - a mandatory requirement expected from mission critical trading systems. The project also outlines an empirical study of feature selection techniques applicable for trading domain, a graph theoretical approach to facilitate determination of a certain subsystem’s health based on constituent component anomalies and an approach to carry out root cause analysis upon anomaly detection. The project deliverables were met through an application of the developed anomaly detection framework to datasets obtained from a trading environment belonging to MillenniumIT Exchange platform. The project resulted in two paper acceptances: (1), (2)Technologies : Java SE, Python -
The Trip
Apr 2016
Development and artwork design for 'The Trip', an Android game accepted at Commercial Bank's Mobile Game Development Challenge '15. The game integrates story telling, gorgeous graphics and revolutionary game-play.Technologies : Unity3D, C# -
Quizzer
Mar 2015
Development of the Android/Web/Facebook game which secured second place at Hackanix '15, a 30 hour hackathon. The game quizzes users on a user-made database of questions derived from important educational topics. The ability to integrate a custom database of questions made the game highly customizable backed by a solid business model.Technologies : Unity3D, C#, PHP