At a glance

• Client: Callsign — cybersecurity and identity intelligence company
• End clients: HSBC, Barclays, Lloyds, Capital One, Bank of America, First Abu Dhabi Bank, Gulf banks, Visa, Equifax
• Scale: 100m+ end users across regulated Tier-1 banking environments
• Duration: March 2020 to June 2022 (full-time)
• Role: Senior Delivery Manager — programme delivery lead across simultaneous banking workstreams

Context

Callsign's core product — behavioural biometric and device intelligence — is embedded directly into the live mobile banking apps of Tier-1 banks. During my engagement, Callsign was the integration partner for HSBC, Barclays, Lloyds, Capital One, Bank of America, First Abu Dhabi Bank, and Gulf banks, plus identity partner for Visa and Equifax. Combined reach: 100m+ end users. Every release was a high-stakes operation.

The challenge

Multiple Tier-1 banking workstreams running at once, narrow overnight deployment windows, strict CAB-governed change control. A zero-defect standard wasn't an aspiration — it was the floor. And the business needed to move faster at the same time.

What I did

• Owned end-to-end release management — CAB approvals, rollback planning, overnight deployment windows, post-deployment telemetry, across simultaneous banking workstreams.
• Led the nine-month mandatory Microsoft security compliance rollout across every Tier-1 banking integration — executed under CAB approval and strict change control, with zero customer-impacting incidents.
• Introduced SAFe across four delivery teams — the structure needed to lift deployment frequency without breaking the zero-defect standard.
• Led live service incident bridges when production issues hit — coordinating hotfix delivery across engineering, client, and vendor teams.

Outcomes

• 100% increase in deployment frequency within 6 months of SAFe implementation.
• 30% reduction in lead time within 6 months.
• Zero-defect release record maintained throughout the engagement.
• Simultaneous delivery across HSBC, Lloyds, and FAB product streams at 100m+ user scale.
• Live incident bridge leadership — service continuity across all Tier-1 integrations.

The full case study is available on request — get in touch and I'll send it directly.