Sydney, Australia | Posted on 07/27/2026

Urgentrequirement of Senior Calypso Developer - Contract - Sydney

Requirements

Description:

We are seeking an experiencedSenior 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 inCalypso 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.

Calypso Development & Customisation

- Design and developcustom Calypso solutions usingJava , Calypso APIs, and framework components

- Implement and maintainCalypso workflows , custom actions, rules, scheduled tasks, and event processing

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

- Configure and extend Calypso functionality fortrade capture, confirmations, settlements, risk, valuation, and collateral

- Experience or exposure toCalypso Automated Testing Tool (CATT) for supporting automated regression testing, validating custom workflows/APIs, and ensuring solution stability across releases.

Integration & APIs

- Build and supportreal-time and batch integrations using Calypso APIs (XML, REST, JMS, messaging frameworks)

- Develop and maintain interfaces withupstream and downstream systems (trading, market data, clearing, settlement, reporting)

- Support inbound and outbound messaging, feeds, and file-based integrations

Platform Ownership & Support

- Performimpact analysis for change requests, regulatory updates, and Calypso upgrades

- Troubleshoot complex production issues, performroot 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 withBusiness Analysts to translate functional requirements into technical designs

- Work with architects to align solutions withenterprise and Calypso architecture standards

- Participate inAgile 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 withCalypso Trading & Risk Management Platform

- Extensive experience withCalypso APIs , custom engines, and frameworks

- Deep knowledge ofCalypso workflows , rules, tasks, events, and schedulers

- StrongSQL skills for data analysis, troubleshooting, and reconciliation

- Experience withUnix/Linux , shell scripting, and batch processing

Calypso Functional Knowledge

- End-to-endtrade lifecycle expertise across Front, Middle, and Back Office

- Post-trade processes includingconfirmations, settlements, clearing, margining, and reconciliations

- Understanding ofrisk, valuation, P&L;, collateral management , and static/reference data

Integration & Infrastructure

- Experience withmessaging frameworks (e.g., JMS, MQ)

- Familiarity withmarket data feeds and downstream reporting systems

- Knowledge ofCalypso upgrade and migration activities is a solid plus

Ways of Working

- Experience working inAgile / 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 supportingregulatory-driven change

- Exposure tohigh-availability or mission-critical trading platforms

- Experience with DevOps practices, CI/CD pipelines, or performance tuning

Duration: 06 Months andpossible extension

Eligibility: Australian/NZCitizens/PR Holders only

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📌 Senior Calypso Developer - Contract - Sydney (City of Sydney)
🏢 Hastha Solutions
📍 City of Sydney