Darong Mean Email & Phone Number

Gothenburg, Vastra Gotaland County, Sweden

- Enhanced robustness of integrations with unreliable banks, increasing acceptance rates by up to 30%.- Optimized deposit flow, improving acceptance rates by up to 30% and reducing session time by 20%.- Implemented an integration feature, reducing a significant amount of operation costs.- Implemented instant refund integrations with Brazilian banks, enhancing the user experience.- Created deposit, payout, and reconciliation integrations with Brazilian banks.- Created deposit, payout, and reconciliation integrations with Finnish banks using SEPA transfer.- Developed deposit, payout, and reconciliation integrations with Swedish banks, supporting PSD2 APIs and fallback solutions.- Implemented B2B payments supporting Bankgiro, Plusgiro, and co-signing.- Resolved issues with bank integrations, ensuring systems processed millions of transactions monthly.

United States

- Enabled the business to accept Bitcoin and other cryptocurrencies by integrating with Fireblocks.com.- Implemented Stripe.com integration and addressed support queries about payment failures and card declines.- Improved application logs with Opentelemetry.io, boosting monitoring and troubleshooting.- Enhanced alert system with OpenSearch.org for better incident response.- Fixed race condition issues with Paygarden.com gift cards, streamlining processing and preventing financial losses.- Improved Robux withdrawal process for a more efficient customer experience.- Developed a holiday raffle game, adding an engaging feature and retaining customers.- Implemented SMS rate limits via Telnyx.com, ensuring reliable communication.- Enhanced customer communication with Onesignal.com for email, SMS, and push notifications.- Integrated Adurite.com and Iterable.com, enhancing platform capabilities and user experience.

London, United Kingdom

- Resolved support tickets for failed payments, chargebacks, and MTI timeouts.- Resolved production issues alerted by PagerDuty and Standby channels.- Developed and implemented credit card management APIs using Spring Boot.- Maintained MasterCard and Visa processing systems, handling millions of transactions daily.

Singapore

- Migrated applications from Azure to AWS, reducing operational costs.- Maintained a data pipeline engine, ingesting data from popular Southeast Asian e-commerce platforms like Shopee.com and Lazada.com.- Pre-processed pipeline data for analytics, enabling merchants to track product performance more effectively.

Quebec, Canada

- Maintained APIs for the merchant live dashboard, used by 2500+ stores in the United States, processing 34 million store visits per month, tracking pickup orders, and providing real-time statistics for orders.- Optimized PostgreSQL query performance, reducing response time from 50s to 30s.- Converted SQL queries to Apache Beam streaming jobs, reducing stats endpoint response time from 30s to 1s.- Created a Clojure wrapper for Apache Beam.- Improved test robustness with generative end-to-end tests and migrated Postman tests to Clojure tests.- Enhanced test coverage for AWS SNS and Twilio integrations.- Migrated a simulator tool from TypeScript to Clojure, reducing tool fragmentation.

Phnom Penh, Cambodia

- Expanded the development team from 2 to 7 developers.- Enhanced team knowledge in continuous integration, pair programming, and the Mikado method, fostering a culture of high-quality code and system improvements.- Designed technical solutions for Crosswired.com and related projects.- Upgraded Liferay from 6.2 to 7.0, enabling the business to leverage the latest technology for future projects.- Integrated Single Sign-On (SSO) between Liferay, SAP Netweaver, SAP R3, and Keycloak, facilitating customer onboarding.- Integrated SSO between SAP Portal and MS Reporting Service 2012 for a client’s finance team.

Phnom Penh, Cambodia

- Established development and quality assurance processes, including version control, build, and release management.- Created comprehensive learning materials for new team members to facilitate rapid onboarding.- Implemented Liferay with social collaboration features and integrated it with SAP XLSO, ensuring compatibility across organizations and confidence in the security model.

Phnom Penh, Cambodia

- Delivered EHP 6 Upgrade + HCM Renewal Pack 1, including implementing the HCM Admin Landing Page and cleanup of standard modifications and enhancements.- Completed a performance management project, implementing a program to check appraiser consistency and enhancing appraisal document search criteria.- Developed a C# tool using Visual Studio 2010 to migrate QuickR content to SAP Portal KM, significantly speeding up the process and reducing manual work. The tool can also be sold as a standalone product.- Implemented a CAPTCHA tool with image processing functionality and conducted extensive performance tuning.- Revived and significantly reworked an abandoned project after the original author left the company.

- Developed an autocomplete input field, with backend integration using Elasticsearch.- Implemented a multiple-file upload input field with background processing.- Implemented progress feedback during background file uploads.- Created the front end based on the provided design documents.

- Implemented in-house sales and stock management systems.- Designed and implemented in-house customer relationship management (CRM) and credit tracking systems.- Ensured accurate data entry and collection.- Maintained data security and accessibility across the company.- Generated reports for managers and shareholders.- Analyzed sales and stock data, reporting findings to the sales manager.

- Researched and developed an e-book reader application using C#.- Implemented file transfer between the e-book reader application and the back-end server using Windows Communication Framework.

Bachelor, Computer Science And Technology

Hsk, Chinese For Foreign Student

Bsc, Computer Science