Alex Sim
Staff Software Engineer at foodpanda
Singapore
Summary
👤
Senior🎓
Top SchoolAlex Sim is a Staff Software Engineer based in Singapore with 14 years of experience building scalable web and backend systems across e-commerce and travel domains. He has led squads and developer-experience initiatives at Blibli and currently drives platform work at foodpanda, with deep hands-on expertise in PWAs, reactive systems, event sourcing, and Kafka. Alex contributes to open-source tooling for contract testing—adding cookie assertion and YAML support to Spring Cloud Contract—illustrating a focus on robust integration testing and developer ergonomics. He pairs technical leadership and mentoring with a history of teaching and producing educational content, continuing to share insights through a personal blog and seminars. A self-described "codeholic" and bibliophile, he blends rigorous academic training (Master’s from ITB) with practical delivery in complex, high-traffic systems.
14 years of coding experience
8 years of employment as a software developer
Master’s Degree, Software Engineering, 3.80, Master’s Degree, Software Engineering, 3.80 at Institut Teknologi Bandung (ITB)Bachelor’s Degree, Informatics Engineering, 3.78, Bachelor’s Degree, Informatics Engineering, 3.78 at STMIK STIE Mikroskil
English, Indonesian, Chinese
Stackoverflow
3,578reputation
1.3mreached
19answers
36questions
php
top-5%
Github Skills (19)
consumer-driven-contracts10
testing10
java10
javas10
spring-boot10
spring-cloud10
groovy9
php9
yaml8
spock7
junit7
optimization6
webforms6
asp-net6
netbeans6
Programming languages (10)
Github contributions (5)
spring-cloud/spring-cloud-contract
Apr 2018 - Apr 2018
Support for Consumer Driven Contracts in Spring
Role in this project:
Backend Developer
Backend DeveloperContributions:5 commits, 1 PR, 6 comments in 2 days
Contributions summary:Alex primarily contributed to the project by adding cookie header checks and supporting cookie assertions within the Spring Cloud Contract verifier. This involved modifying test files to include assertions for cookie values, as well as supporting YAML-based cookie configuration. Additionally, they added compilation tests, and updated the @since version for Cookie(s) class. This indicates a focus on improving the contract verifier's testing capabilities and YAML configuration support for cookies.
spring-boottestingspringmicroservicesjava
bertzzie/medium-editor-polymer
Jun 2015 - Jul 2015
Contributions:26 commits, 1 PR, 13 pushes in 28 days
mediumpolymermedium-editor
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