Kasun Gunasekara
Senior Software Engineer at Delivery Hero
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolKasun Gunasekara is a Senior Software Engineer based in Berlin with 11 years of experience building backend systems and database-driven solutions. He has a strong engineering foundation from the University of Westminster and a proven track record at companies like Delivery Hero and Zone24x7. Kasun contributes to notable open-source projects such as WSO2 API Manager, where he drove cross-database schema changes to improve token-based authorization and API access control. He excels at fixing complex backend bugs, refining DAO layers, and improving exception handling and caching behavior to harden production workflows. Known for pragmatic problem-solving, he blends hands-on database engineering with a clear focus on API security and operational reliability. Colleagues describe him as a steady, detail-oriented engineer who surfaces subtle improvements that reduce runtime surprises.
11 years of coding experience
8 years of employment as a software developer
Bachelor of Engineering (BEng), Computer Software Engineering, Bachelor of Engineering (BEng), Computer Software Engineering at University of WestminsterRichmond CollegeBachelor of Engineering (BEng), Computer Software Engineering, Bachelor of Engineering (BEng), Computer Software Engineering at Informatics Institute of TechnologyBachelor of Science (BSc), Computer Science, Statistics, Mathematics, Bachelor of Science (BSc), Computer Science, Statistics, Mathematics at University of Sri Jayewardenepura
English, Sinhalese
Stackoverflow
1reputation
22reached
0answers
1question
Github Skills (16)
javas10
api-management10
sql10
database-design10
java10
mysql9
mssql9
apidoc9
oracles9
postgresql9
h29
api9
oracle9
rest7
api-gateway7
Programming languages (2)
Github contributions (5)
wso2/carbon-apimgt
Feb 2015 - Jun 2015
Role in this project:
Back-end Developer
Back-end DeveloperContributions:51 commits, 23 PRs, 9 comments in 3 months
Contributions summary:Kasun primarily focused on bug fixes and code enhancements within the API Management implementation. Their contributions involved modifications to database access objects (DAO), specifically adjusting SQL queries related to application subscriptions. Additionally, the user removed caching mechanisms for scopes and addressed several issues related to the API Store and application registration workflows. The user also made improvements to exception handling in API provider implementations.
api-management
wso2/product-apim
Mar 2015 - Mar 2015
Welcome to the WSO2 API Manager source code! For info on working with the WSO2 API Manager repository and contributing code, click the link below.
Role in this project:Backend Developer & Database Engineer
Backend Developer & Database EngineerContributions:5 commits, 2 PRs in 23 days
Contributions summary:Kasun primarily focused on database schema modifications within the WSO2 API Manager. Their contributions involved adding a `TOKEN_SCOPE` column to the `AM_APPLICATION_REGISTRATION` table across various database types (H2, MySQL, PostgreSQL, Oracle, and MSSQL), indicating a focus on API security and access control. The changes extended to multiple SQL files within the distribution module to ensure database compatibility. These modifications likely contribute to the API Manager's functionality by improving its token-based authorization.
api-gatewayworking-onwso2api-managementlink
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