Urgent requirement of Senior Calypso Developer - Contract - Sydney Requirements Description: We are seeking an experienced Senior Calypso Developer to work on complex trading and post-trade platforms within a financial market?s technology environment. This role is hands-on and requires deep expertise in Calypso development, Java, APIs, and Calypso workflows, supporting the full lifecycle of system development, enhancement, and production support. The successful candidate will design, develop, and support robust Calypso solutions across front-to-back-office processes, working closely with business analysts, architects, and support teams to deliver scalable, high-performance, and regulatory-compliant solutions. Key Roles &

Responsibilities Calypso Development & Customisation Design and develop custom Calypso solutions using Java, Calypso APIs, and framework components

Implement and maintain Calypso workflows, custom actions, rules, scheduled tasks, and event processing

Develop and enhance trade workflows, lifecycle events, and post-trade processing logic

Configure and extend Calypso functionality for trade capture, confirmations, settlements, risk, valuation, and collateral

Experience or exposure to Calypso Automated Testing Tool (CATT) for supporting automated regression testing, validating custom workflows/APIs, and ensuring solution stability across releases. Integration & APIs Build and support real-time and batch integrations using Calypso APIs (XML, REST, JMS, messaging frameworks)

Develop and maintain interfaces with upstream and downstream systems (trading, market data, clearing, settlement, reporting)

Support inbound and outbound messaging, feeds, and file-based integrations Platform Ownership & Support Perform impact analysis for change requests, regulatory updates, and Calypso upgrades

Troubleshoot complex production issues, perform root cause analysis, and implement permanent fixes

Optimise system performance, scalability, and stability across Calypso components





Support BAU activities including incident resolution, release deployments, and enhancements Delivery & Collaboration Collaborate closely with Business Analysts to translate functional requirements into technical designs

Work with architects to align solutions with enterprise and Calypso architecture standards

Participate in Agile delivery ceremonies and contribute to continuous improvement initiatives

Ensure adherence to coding standards, security, audit, and regulatory requirements Required Skills & Experience Core Technical Skills Strong hands-on experience with Calypso Trading & Risk Management Platform

Expert-level Java development (server-side, performance-optimised code)

Extensive experience with Calypso APIs, custom engines, and frameworks

Deep knowledge of Calypso workflows, rules, tasks, events, and schedulers

Solid SQL skills for data analysis, troubleshooting, and reconciliation

Experience with Unix/Linux, shell scripting, and batch processing Calypso Functional Knowledge End-to-end trade lifecycle expertise across Front, Middle, and Back Office

Asset classes: Rates, FX, Fixed Income, Derivatives, Repos

Post-trade processes including confirmations, settlements, clearing, margining, and reconciliations

Understanding of risk, valuation, P&L;, collateral management, and static/reference data Integration & Infrastructure Experience with messaging frameworks (e.g., JMS, MQ)

Familiarity with market data feeds and downstream reporting systems

Knowledge of Calypso upgrade and migration activities is a strong plus Ways of Working Experience working in Agile / Scrum delivery models

Strong analytical, problem-solving, and debugging skills

Ability to work independently in complex, regulated environments

Excellent communication and collaboration skills Nice to Have Experience supporting regulatory-driven change

Exposure to high-availability or mission-critical trading platforms

Experience with DevOps practices, CI/CD pipelines, or performance tuning Duration: 06 Months and possible extension Eligibility: Australian/NZ Citizens/PR Holders only Email: [email protected]

📌 Senior Calypso Developer - Contract - Sydney
🏢 Irish Around Oz
📍 Sydney