Senior Calypso Developer - Capital Markets (Implementation & Transformation)

We are seeking experienced Calypso Developers for high-profile transformation and implementation programmes in global capital markets. Calypso is a large-scale, front-to-back trading platform supporting trading, risk management, and post-trade processing across asset classes, built on a robust Java-based architecture.

This opportunity involves complex greenfield implementations, upgrades, and transformation initiatives, working with global teams across EMEA, North America, and APAC.

Responsibilities

• Design, develop, and deliver Calypso solutions across the full trade lifecycle within large-scale implementation and transformation programmes.
• Collaborate with Front Office, Risk, Operations, and Technology stakeholders to translate business requirements into technical solutions.
• Support greenfield implementations, version upgrades, and transformation initiatives in global capital markets environments.
• Integrate Calypso with external systems through APIs, messaging, and batch processing.
• Contribute to the full software development lifecycle, from analysis and design through deployment and post-go-live support.
• Develop and maintain unit and integration tests to ensure high-quality deliverables.
• Partner with development and testing teams across EMEA, North America, and APAC to deliver in complex, fast-paced programmes.
• Provide technical expertise on the Calypso object model and architecture to guide design decisions.
• Troubleshoot and resolve complex technical issues across trading, risk, and post-trade processes.

Requirements

• Proven experience as a Calypso Developer on implementation, upgrade, or transformation programmes.
• Hands-on expertise in Calypso; v16+ is preferred.
• Strong understanding of the Calypso object model and architecture.
• Solid Java development skills, including Spring and Hibernate.
• Full SDLC background with excellent object-oriented analysis and design skills.
• Understanding of the trade lifecycle across front-office, risk, and back-office processes.
• Knowledge of one or more asset classes: Rates, FX, Credit, Equities, or Commodities.
• Experience integrating Calypso with external systems via APIs, messaging, and batch processing.
• Proficiency in SQL and relational databases.
• Ability to write unit and integration tests.
• Strong problem-solving ability in fast-paced delivery environments.
• Ability to collaborate effectively with development and testing teams.

We offer

• Work with top technology specialists driving innovation in AI, cloud, and digital-platform modernization.
• Supportive team and agile, startup-like culture.
• Hybrid-by-design work and the opportunity to work remotely within Poland.
• Opportunity to work abroad for up to 60 days annually.
• Business-driven relocation opportunities.
• Career development programmes, thought leadership, mentoring, soft-skills, and well-being programmes.
• Certification opportunities in Anthropic, Gemini, GCP, Azure, and AWS.
• English classes.
• Stable pay.
• Participation in the Employee Stock Purchase Plan with a 15% discount.
• Benefits package including health insurance, multisport, and shopping vouchers.
• Referral bonuses of up to $2,000.
• Offices with entertainment and relaxation zones, table tennis, football, free snacks, coffee, and more.
• Corporate, social, and well-being events.

Benefits listed above are available to employees only.

Contractor arrangements are also available; terms of B2B cooperation agreements are agreed individually.

Only selected candidates will be contacted.