19 of 19 Legacy Systems Jobs in the City of London

operationally reliable. The role is outcome-driven: establishing a data environment the business can trust and operate from, without reliance on legacy systems or manual reconciliation. Positioned between engineering and operations, this role works directly on real business problems rather than abstract data tasks. It requires … issues across customer portfolios, inventory, and transactions. Reconstruct and validate complex historical data, including broken transaction chains and misaligned holdings. Ensure SAP and connected systems reflect a consistent, accurate, and operationally reliable data position. Identify systemic data issues and implement scalable, repeatable solutions to reduce manual intervention. Design ...

central to shaping the future of our technology landscape, overseeing up to £400m of IT investment and driving the transformation of legacy systems into modern, scalable architecture. What you’ll do: Lead and inspire a team of Solution Architects, providing strategic and technical direction across multiple domains. … large-scale organisation is essential. AWS Certified, with practical experience applying cloud architecture principles in complex organisations. Experience transforming legacy systems and delivering modern architecture in a matrixed environment. Strong background in application development, integration, infrastructure, and cloud technologies. Experience collaborating with leaders at a senior level ...

Stack Developer to support and enhance enterprise ERM/Exposure Management platforms . This contract role focuses on maintaining and modernising legacy systems while building backend services and integrations within a highly specialised risk environment. Key Responsibilities Develop and enhance full‐stack applications, including new features … system improvements Support and refactor legacy platforms, ensuring performance, scalability and stability Troubleshoot complex production issues across business‐critical systems Design and integrate REST APIs and third‐party services, including exposure/cat modelling tools Collaborate with business and technical stakeholders in an agile delivery environment ...

business teams across the full lifecycle Engaging with stakeholders to translate business requirements into technical solutions Supporting data migrations from legacy systems to modern cloud environments YOUR SKILLS AND EXPERIENCE Proven experience as a Data Architect (not purely engineering-focused) Strong Financial Services experience (banking, capital markets ...

products. With a strong reputation for solving complex technical challenges, they work with leading organisations to deliver AI-enabled solutions, modernise legacy systems, and build high-performance applications. Their teams are distributed globally and operate in a highly collaborative, engineering-led environment. The Role As a Technical ...

Level 1 (Level 2 desirable) Experience delivering enterprise-scale integrations Integration experience with Salesforce, SAP, ServiceNow, AWS/Azure, databases, and legacy systems Knowledge of API security (OAuth 2.0, JWT, mTLS/SSL/TLS) Familiarity with CloudHub v2.0, Runtime Fabric, and hybrid architectures Why Apply Fully ...

your career at the intersection of technology, mathematics, and finance Join an elite global trading firm where innovation drives everything — no legacy systems, no bureaucracy, just cutting-edge tech and world-class mentorship . You’ll work on greenfield projects from day one, collaborating with exceptional engineers … quants, and researchers to build the systems and models shaping the future of global trading. 🔧 What You’ll Do 🧠 Design and enhance advanced trading systems and analytics platforms 📊 Develop and implement your own quantitative models and research ideas 🤝 Collaborate closely with top technologists, quants, and portfolio managers 🚀 Learn ...

hands-on lead role with strong ownership across design, build and technical direction. This role suits engineers who enjoy complex, low-latency, real-time systems and modern cloud platforms. Key Responsibilities Design and build real-time, event-driven microservices in Java Create and manage Kafka topics (Azure Event … live trade data Contribute to the modernisation of legacy systems into Azure Work closely with front- and middle-office stakeholders on real-time FX flows Provide technical leadership, best practices and mentoring within the team What will make you successful? Strong Java engineering background Proven experience building ...

Income Processing Officer Reporting to the Income Processing Manager you'll be responsible for fast tracking process improvements as we move from our legacy CRM system to Salesforce. You'll challenge the status quo and end-to-end process' that are embedded in our current delivery models. ...

influence over the product, technology and wider company direction. You won’t be joining a heavily layered corporate environment or maintaining legacy systems with little visibility over impact. The team is lean, collaborative and highly product-focused, with close working relationships across founders, product, engineering and operations. … There is genuine opportunity to: • Build products and systems from the ground up • Shape how the platform evolves as the business scales • Solve complex real-world operational problems • Influence product direction and decision-making • Operate with high ownership and autonomy • Work closely with founders and senior stakeholders • Have visible ...

supporting modern data platform, with a particular focus on Databricks, cloud-based data engineering, and leading the migration of legacy Oracle systems into scalable, cloud-native environments. The role supports the organisation's data strategy especially on Finance and Regulatory domain by ensuring high-quality, reliable pipelines … environment management. Ensure governance, performance optimisation. Legacy Oracle Migration Leadership Lead and coordinate the migration of data assets from Oracle database systems to the modern cloud data platform. Oversee source-to-target mapping, data model redesign, and automated migration frameworks. Define strategy for retiring legacy ...

Engineer | London | Up To £140,000 + Equity We’re working with a well-backed early-stage AI company building enterprise-grade generative AI systems for complex, high-value workflows. The team is small, technical, and moving fast - they’re now looking for a Founding AI Engineer to help … shape both the product and engineering culture from the ground up. This is not a “maintain legacy systems” type role. You’ll be joining at the stage where architecture decisions still matter, product direction changes weekly, and exceptional engineers can have outsized impact. The focus ...

across core back-office platforms including HR, Finance, and ERP. You'll lead the design of scalable, integrated architectures that modernise legacy systems and enable efficient, data-driven operations. Acting as a subject matter expert, you'll define target architecture, support business cases, and ensure technology choices … party providers, and guide teams to deliver high-value outcomes. We're looking for a pragmatic, influential architect with strong experience across HRIS, finance systems, ERP platforms, and enterprise integration within complex environments. A key role driving the evolution of critical business systems. ...

Exposure to Android ecosystems or device-agnostic platforms. Background in logistics, operations, or field-based workforce environments. Experience in large, complex organisations with legacy systems. To apply for this Senior Project Manager position, please submit your CV and a member of the Reed Professional Services Talent Team will ...

influence over the product, technology and wider company direction. You won’t be joining a heavily layered corporate environment or maintaining legacy systems with little visibility over impact. The team is lean, collaborative and highly product-focused, with close working relationships across founders, product, engineering and operations. … There is genuine opportunity to: • Build products and systems from the ground up • Shape how the platform evolves as the business scales • Solve complex real-world operational problems • Influence product direction and decision-making • Operate with high ownership and autonomy • Work closely with founders and senior stakeholders • Have visible ...

Data Services, and other ETL/integration tools, ensuring scalability and repeatability across multi-wave programmes. Lead complex data conversion activities across SAP systems, including HR (SuccessFactors & Payroll), Supply Chain (EWM), and Master Data governance platforms (MDG). Drive cutover planning and execution from a data perspective, ensuring predictable … planning, reconciliation, and alignment with business timelines. Define and oversee reconciliation, validation, and audit processes to ensure data completeness, accuracy, and integrity across all systems in scope. Facilitate data design and migration workshops with business stakeholders, translating requirements into data models, mappings, and transformation rules across multiple functional domains. ...

Manager, Data Management About the Role Looking for a Project Manager to lead a major, multi-year transformation programme focused on replacing a legacy administration platform with a modern, centrally sourced solution. This role will play a critical part in driving the successful delivery of a complex change … equivalent) with relevant degree or experience Proven experience delivering complex, multi-year programmes across full project lifecycles Background in data-led initiatives and legacy system migration; insurance experience desirable Key Skills: Strong stakeholder management and communication skills Excellent planning, governance, and problem-solving abilities Comfortable working in fast ...

Event‐driven architectures and cloud‐native integration models, with AWS experience preferred Challenging and directing suppliers and system integrators at a senior level Legacy system conversion and end‐to‐end delivery oversight across build, test and release cycles Experience within FinTech or modern digital banking environments Previous Banking … below. Solutions Architect, Banking Architect, Core Banking, Sopra, SBS, SOPRA Banking Software, AWS, Cloud Native, Event Driven Architecture, System Integration, FinTech, Digital Banking, Legacy Modernisation, London #J-18808-Ljbffr ...

exceptions. Support the Senior Business Analyst in discovery sessions, capturing detailed notes and iteratively updating documentation based on stakeholder input. Map data flows between systems and support the translation of process steps into system and integration requirements. Required Skills & Qualifications: Proven experience as a Business Analyst in complex transformation … environments. Desirable Experience: Background in media, publishing, or content-led organisations. Familiarity with rights management, syndication, or contributor workflows. Experience with finance/payroll systems or compliance-heavy environments. Knowledge of integrated enterprise systems. Personal Attributes: Highly detail-oriented and methodical. Curious and investigative, with a collaborative and adaptable ...