Open to opportunities

Jonathan Lodge

@jonathanlodge

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I build financial infrastructure, blockchain platforms, and AI-enabled systems across the full software lifecycle.

Indonesia

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What I'm looking for

I'm looking to build impactful technology solutions for complex business problems, particularly in collaborative teams that value trust, robust testing, continuous improvement, and modern AI or blockchain-enabled engineering.

I've built financial infrastructure at havona.io, credbull.io, SIX Digital Exchange, UBS Investment Bank, and Citibank, spanning institutional trade platforms, private credit products, securities depository capabilities, and high-volume data systems.

At havona.io, I worked on an MLETR-compliant global trade platform that digitises title transfer and trade documents across 30+ jurisdictions. I used GenAI throughout planning, design, and implementation, alongside Claude Code, Solidity, Python, TypeScript, Dgraph, and Google Cloud.

At credbull.io, I maintained TypeScript and Solidity code and designed smart contracts for the LiquidStone product on the Plume network, with rigorous testing before audit. At SIX Digital Exchange, I helped shape the platform from its earliest development, led delivery of Central Securities Depository functionality, and contributed to recruitment, standards, and team culture.

Across more than 25 years, I've delivered end-to-end software—from requirements, architecture, data models, and APIs to implementation, testing, operations, and development standards. I enjoy collaborative teams that tackle complex problems with robust engineering practices and continuous improvement.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Havona Technology Ltd.

Jul 2025 - May 2026 (10 months)

Built a post-trade processing web2/web3 platform using RAG for multi-format data ingestion, natural language querying, and strategic reporting. Utilized GenAI across planning, design, and implementation.

Senior Software Engineer

Credbull

Apr 2024 - Nov 2024 (7 months)

Developed modern smart contracts and a web3 application to enable private credit for institutional and retail clients (DeFi). Maintained existing code and designed smart contracts for the LiquidStone product.

Solidity TypeScript OpenZepellin EthersJS Next.js Hard Hat Supabase Git GitHub

Solution Designer

SIX Digital Exchange (SDX)

Sep 2017 - Oct 2022 (5 years 1 month)

As a founding engineer, helped develop a Central Securities Depository (CSD) from first principles using Corda 4.x. Duties included design, development, build management, configuration, and technical team leadership, to a Staff Engineer level.

Kotlin Corda Gradle Scala Clojure GraphQL Lacinia Pedestal XTDB Git Gitlab

Senior Software Engineer

SIX F10

Feb 2016 - Sep 2017 (1 year 7 months)

Developed an innovative web application, modernising legacy data feeds into event sourcing data streams to enable crowd-sourcing of high quality corporate actions data. Worked on the UniLog Proof of Concept and xChain MVP projects.

Scala Clojure Akka Akka Streams Datomic Datascript TypeScript JavaScript Git Sbt MDD

Senior Software Engineer

SIX Group

Jul 2014 - Sep 2015 (1 year 2 months)

Developed a database/J2EE backend for supplying contextual REPO data to the UI. Responsible for end-to-end development of components of the NESI Reference Data Server.

Oracle Java Java EE WildFly Arquillian Junit

Senior Software Engineer

UBS Investment Bank

Feb 2014 - Jul 2014 (5 months)

Developed a configurable tool to enable client teams to feed their data into the Client Data Confidentiality (CDC) program easily. Designed and implemented a data flow remediation library on top of Apache Camel.

Java Junit SLF4J Logback Jakarta Commons Spring Framework Git XML XSLT XPath JAXB Apache Camel

Global Development Manager

Citibank

Oct 2010 - May 2013 (2 years 7 months)

Led a global team developing a data warehousing suite with configurable ETL capabilities, feeding into a database apparatus. Designed client library suites for onboarding client teams and liaised with clients and vendors.

Software Engineer

UBS Investment Bank

Dec 2005 - Apr 2010 (4 years 4 months)

Worked on multiple projects including a custom XML message ingestor and data feed routing middleware, all in Java. Contributed to the OWX/TDS, Trade Event Manager, FXI Data Feeds, and Structured Products Universal Data Service projects.

Middleware Developer

IG Index plc.

Apr 2003 - Dec 2005 (2 years 8 months)

Worked on maintenance, upgrade, and update of the Enterprise layer. Developed the Ant build system, re-developed the Applet-based SlingShot client, and developed CORBA-based Price Lookup Service.

Java JDBC JNDI JSP EJB JMS Ant Junit Log4j ArgoUML Sourcesafe WinCvs Ideas Oracle XML Perl Shell Scripting

Software Engineer

Jacus Pty.

Feb 2001 - Mar 2002 (1 year 1 month)

Worked as a Java Designer/Developer on the Calypso Project, a Java-Linux PDA. Responsible for component design, implementation, and unit testing, including the Simple Remote Invocation framework and Alarm Management.