76 to 83 of 83 Legacy Systems Jobs in the City of London

of penetration testing experience (infrastructure/internal focus) Strong hands-on expertise with Active Directory attacks, lateral movement, and privilege escalation Experience navigating live and legacy production systems Comfortable in Windows and Linux command-line environments Desirable: Python scripting or automation experience Familiarity with OT (Operational Technology) networks Experience with tools like CrackMapExec, BloodHound, PowerView, etc. Certifications More ❯

Strategic AEs already earning £1.5M+ annually. Greenfield opportunity - Own and expand into some of the world’s largest enterprises in EMEA. Category-defining tech - Replacing legacy procurement systems with a sleek, AI-first platform. Elite leadership - Proven SaaS operators, top-tier VC backing, and a strong sales playbook. The Role As a Strategic Enterprise Account Executive , you More ❯

issues with various teams (Models Analytics, tech teams, ePricing etc) Check trade and cash data and make sure they are handled properly. Compare Risk and PV vs Existing legacy system. Host weekly working group with G10 traders Document all differences, gather sign offs KEY Relationships: FM users : Front Office, Market Risk, Finance, Middle Office, Operations Technology : Development leads More ❯

responsibilities include: Leading the commercial relationship with one of the business’s most important outsourced IT service providers Managing contract performance, value delivery, and governance across legacy systems and service infrastructure Partnering with senior internal stakeholders in IT, procurement, and operations Supporting the transition to an integrated commercial and SRM (Supplier Relationship Management) model Acting as the … Required Skills: Strong commercial acumen with end-to-end category ownership experience Deep expertise in Tech Services procurement , particularly infrastructure, cloud, SaaS, data, and/or legacy systems Proven ability to manage high-value, complex outsourced service providers Strong supplier relationship and performance management capability Strategic sourcing experience with a pragmatic, delivery-focused mindset Excellent stakeholder engagement More ❯

responsibilities include: Leading the commercial relationship with one of the business’s most important outsourced IT service providers Managing contract performance, value delivery, and governance across legacy systems and service infrastructure Partnering with senior internal stakeholders in IT, procurement, and operations Supporting the transition to an integrated commercial and SRM (Supplier Relationship Management) model Acting as the … Required Skills: Strong commercial acumen with end-to-end category ownership experience Deep expertise in Tech Services procurement , particularly infrastructure, cloud, SaaS, data, and/or legacy systems Proven ability to manage high-value, complex outsourced service providers Strong supplier relationship and performance management capability Strategic sourcing experience with a pragmatic, delivery-focused mindset Excellent stakeholder engagement More ❯

across complex and sensitive client environments. This is a hands-on internal testing role, not web application focused, where you'll be expected to work independently and navigate challenging systems with confidence. This role is suited to testers who thrive in technically demanding scenarios, want autonomy, and are motivated by work with real-world impact. Key Responsibilities Conduct internal … penetration testing Strong knowledge of Active Directory exploitation techniques (privilege escalation, lateral movement, etc.) Confident working in high-stakes, sensitive environments Strong command-line skills across Windows and Linux systems Ability to work through legacy systems, unpatched software, and environments with technical debt Desirable Skills Python scripting or automation experience Understanding of Operational Technology (OT) networks More ❯

influence architecture, ship fast, and see your impact daily Work alongside brilliant engineers who value clarity, curiosity, and ambition A clean slate to build from no legacy systems, just smart tools and real users In-person, 5 days a week in Central London with a close-knit, collaborative team Stack: Python, React, Next.js, TypeScript, FastAPI, Postgres We More ❯

skilled Network Engineer with Nokia IP/MPLS expertise to play a key role in a multi-year digital transformation initiative. This is a high-impact project replacing legacy SDH infrastructure with a modern Nokia 7750 MPLS Core , underpinning critical connectivity across the rail network. The Opportunity Join a long-term (3-year) infrastructure rollout program within one … mission-critical transport infrastructure Take ownership of design, implementation, and configuration of Nokia-based solutions Collaborate with project and field teams to ensure seamless transition from legacy systems What You'll Do Lead the design and configuration of a Nokia 7750 MPLS core network Replace legacy SDH infrastructure with high-performance IP-based systems … reliable, real-time connectivity Carry out hands-on configuration, documentation, testing, and deployment Travel to East London sites to support implementation and troubleshooting Ensure uptime and redundancy for key systems operating in a safety-critical environment Key Skills Required Proven experience with Nokia IP/MPLS platforms (especially 7750 Service Routers) Strong understanding of network protocols (OSPF, BGP, MPLS More ❯