Calypso Equity Swaps Functional SME in London

G MASS are working with a global financial services group to appoint a senior Calypso subject matter expert to act as the firm’s independent technical voice on a Calypso equity swaps programme. The group is extending its Calypso platform to support equity swap and total return swap business in a new entity, with delivery led by an external implementation partner. This role sits on the client side, giving the business the depth of Calypso knowledge it needs to scrutinise the partner’s designs, estimates and test outcomes with confidence. You will also bring across the lessons learned from a previous TRS implementation within the group, so the new rollout benefits from what has already worked and avoids what hasn’t. This is a highly visible advisory position where clear thinking and the ability to stand your ground with a vendor will be just as important as technical depth.

Responsibilities

• Act as the client’s independent Calypso authority, reviewing the implementation partner’s functional designs and configuration proposals across the full equity swap lifecycle, including product setup, resets, financing, notional changes, dividends and corporate actions.
• Extend that review into downstream areas such as collateral, settlement, accounting and reconciliations.
• Scrutinise delivery estimates and change requests, and put forward a well-evidenced challenge where scope, effort or approach doesn’t hold up.
• Run early product fit testing so functional gaps are identified and addressed well ahead of UAT.
• Advise on the extension of the platform to basket swaps, and on where an existing setup elsewhere in the group can be reused.
• Design the data migration and reconciliation approach in partnership with a business analyst in the US team.
• Review UAT results and defects, recommending standard Calypso practice that keeps the configuration scalable and maintainable.
• Take ownership of several programme workstreams while supporting others across the wider delivery.

Requirements

• Deep functional and configuration expertise in Calypso, specifically covering equity swaps, total return swaps or portfolio swaps.
• A track record of reviewing and challenging Calypso configuration delivered by a third party, with experience on the vendor or implementation partner side particularly valued.
• Hands-on involvement in at least one Calypso migration, including the data migration and reconciliation work.
• Strong written analysis skills and the confidence to hold a firm, evidence-based position in vendor discussions.

Desirable

• Experience of Calypso in SaaS or managed service environments.
• Background in synthetic prime brokerage or equity financing.

Benefits

• Location: London, in the office five days a week by default. It may sometimes be required to work to an 11:00-19:00 UK day for New York overlap. Travel to New York for UAT or cutover may be required.
• Engagement: Contract through G MASS on an initial six month basis.