Job Title: Windows Support Engineer – Windows COTS & Integrations Location: Canary Wharf, UK Department: Application Platform Operations / Application Services

Purpose of the Role : To ensure the reliable operation, maintenance, and upgrade of Windows-based COTS software, as well as to manage integrations with identity/authentication systems (e.g. Okta), IIS web servers, and supporting scripting to automate, monitor, and troubleshoot these systems. You will work as part of our Application Support / Platform Operations team, ensuring minimal downtime, rapid resolution of defects, continuous improvement, and adherence to internal, regulatory, and security standards.

Key Responsibilities: Support, maintain, and upgrade Windows-hosted COTS applications in production, UAT, development environments; coordinate patching, version upgrades, vendor interactions. Manage integrations with identity and access management platforms (Okta or similar), including Single Sign-On (SSO), user provisioning, attribute mapping, and ensuring secure authentication flows. Operate and maintain IIS web servers (configuration, SSL certificates, bindings, application pools, security hardening). Develop, maintain, and execute scripts (PowerShell, batch scripting, possibly Python) for automation (deployment, monitoring, health checks, log parsing, remediation). Troubleshoot application issues, including performance, integrations (authentication/authorization), availability, and errors; work across teams (infrastructure, security, development, and vendor) to isolate root cause. Assist with release management: reviewing upgrades/patches, scripting or deploying changes, ensuring robust rollback options, coordinating with QA/UAT. Maintain thorough technical documentation including runbooks, change plans, operational procedures, escalation protocols. Monitor metrics and alerts; ensure SLAs / KPIs (uptime, response/resolution times) are met; manage incident / problem management lifecycle in compliance with our governance. Efficient change management, keeping to regulatory, audit, risk, security requirements. Engage with vendor support: liaising for patches, bug fixes, feature requests, licensing. Possibly provide on-call or out-of-hours support coverage.

Skills, Experience & Qualifications: Essential: Experience supporting Windows Server environments (preferably versions relevant to ours). Familiarity with COTS applications (vendor software) in banking / financial services / other regulated environments. Strong knowledge of IIS web server: configuration, deployment, SSL/TLS, security, and performance tuning. Experience integrating applications with identity providers / IAM systems such as Okta (SSO/SAML/OIDC), user provisioning. Strong scripting skills – PowerShell is essential; knowledge of other scripting languages (Python etc.) is a plus. Good understanding of networks, authentication, security in enterprise OS context. Experience with monitoring / alerting tools, troubleshooting, performance diagnostics. Understanding of ITIL processes (Incident, Change, Problem Management) and ability to work under SLA constraints.

Desirable: Experience with Unix / Linux support (even if the role is Windows-centric), given our roles often cross platforms. Familiarity with middleware technologies (e.g., MQ, WebSphere) or other vendor tools. Experience with CI/CD and automation tools for deployment and release. Experience working in highly regulated/risk-sensitive environments (financial markets, compliance, audit). Relevant certifications (Microsoft Windows / Windows Server certs; IAM / Okta; ITIL).

Personal Attributes: Excellent problem solver; able to work calmly under pressure and manage/prioritize multiple issues. Strong communication skills—both technical (with peers and vendors) and non-technical (with business stakeholders). Proactive and self-starter mindset; continuously looking for improvements, automations, and efficiencies. Team player; ability to collaborate with multiple teams (Dev, Infrastructure, Security, Vendors). Reliability: commitment to SLRs, operation demands, and possibly shift/on-call.