Jonathon Seah

Led development and support of Cremant, a pre-deal risk application calculating CVA/FVA/WWR and producing P&L, attribution, and sensitivity reports. Spearheaded a FinOps initiative cutting infrastructure costs by 50% via database consolidation and KEDA-driven autoscaling to zero, and migrated on-prem microservices to GCP using GKE and KEDA event-driven autoscaling.

Redesigned the corporate action feed by improving validation and exception handling for support and developer audiences. Supported firm-wide SDLC adoption, migrating legacy applications to Gradle/SVN, expanding unit/functional and regression test coverage, and coordinating deployment to production via the GS SDLC platform.

Served as Senior Software Engineer and later Team Lead for Cremant, delivering risk and valuation functionality with frequent stakeholder engagement (including 40% travel to Singapore for requirements and UAT sign-off). Designed and enhanced correlation engineering, FX volatility calibration, and collateral modelling to improve CVA/WWR/FVA accuracy, and led market-data feed and workflow reengineer

Designed and built the back-end for Autobahn Smart Share, processing REST client requests and integrating with Deutsche Bank systems for data retrieval, persistence, and downstream services. Implemented email generation and introduced agile/CI practices with Maven dependency management and TeamCity-based integration deployments across dev/int/uat/prod environments.

Supported and enhanced Cremant in short development cycles by investigating complex defects, adding unit tests to prevent regressions, and implementing new trade-related capabilities. Designed and developed the Trade Service for managing trade value overwrites, and migrated trades into Cremant via stored procedures and data feeds.

Developed core workflow and data retrieval engines for FastVal risk evaluation software, processing valuation requests and generating equity/FX volatilities for Monte Carlo VAR. Built messaging-based components using Spring, jBPM, JMS with ActiveMQ for reliable high-throughput processing, and supported continuous integration using Hudson and Maven builds.

Delivered SOA/EAI integrations by exposing client systems as J2EE web services with reliable, governed messaging and high-throughput interactions. Redesigned a communication layer that reduced network traffic by 80%, and implemented XML transformations and service monitoring using JAXB/XSLT and JSF-based tooling.

Designed and developed embedded communication and UI managers for smartcard-based fare payment processing running on device hardware under adverse network conditions. Implemented state-machine-driven reliability for device-to-server communication and built device workflow/UI components in C.

Developed a core instant messaging product for mobile devices using Java for constrained environments, including unit/functional testing across multiple mobile OS variants. Redesigned the product to reduce application footprint size by 40% while meeting device-specific size restrictions.

Grade: 2A Honours (equivalent to UK 2:1 Honours)

Activities and societies: Dissertation: Performance of Java 2, Micro Edition (J2ME) on Mobile Devices.

Earned a Bachelor of Engineering in Information Technology at the University of Western Australia. Completed a dissertation on the performance of Java 2, Micro Edition (J2ME) on mobile devices.