17 of 17 Legacy Systems Jobs in the City of London

tools to accelerate and enhance the migration process, and we’re looking for developers who are excited by the opportunity to work at the intersection of legacy systems, modern development, and AI-assisted engineering. Key Responsibilities - Collaborate with the existing team to re-engineer Oracle PLSQL stored procedures into C# services. - Design and implement .NET-based components … that integrate with both legacy PHP systems and new PostgreSQL databases. - Work closely with business analysts and stakeholders to ensure functional parity and identify opportunities for enhancement. - Participate in the design of a hybrid architecture that supports phased migration. - Use AI-assisted tools to analyze, translate, and optimize legacy code. - Support BAU operations during the … Required SkillsExperience - 5+ years of experience in .NET/C# development, with a strong focus on backend services and data access layers. - Proven experience in migrating legacy systems, especially from Oracle to PostgreSQL or similar. - Strong understanding of PL/SQL and experience translating stored procedures into application logic. - Familiarity with PostgreSQL, including performance tuning and SQL More ❯

Responsibilities: Work with clients to analyse their current and future business needs, recommend best practice solutions, and define project deliverables Translate accounting requirements into system configurations Configure debt accounting systems (i.e. Allvue, Broadridge Sentry) to track complex instruments Design customised workflows aligned with investment strategies and processes Migrate data from legacy systems with validation controls Track … strategies Produce detailed status reports, track actions, and manage progress meetings Create and deliver training materials and documentation Provide ongoing system optimisation and support Qualifications and Skills: Private Credit Systems Implementation Experience (Highly Desired): Minimum 2-3 years of experience implementing private credit Investment Accounting software is highly valued. Ideal candidates would have exposure to requirements gathering, system configuration … complex capital structures, and accurately book transactions such as drawdowns, repayments, PIK interest, and fee amortisation is essential. Experience reconciling positions and cash flows across administrators, custodians, and internal systems is also highly valued. System Knowledge: Proficiency with industry-standard platforms utilised in private credit investment operations and accounting. Strong expertise with Allvue investment accounting is highly desired. Experience More ❯

embedded in some of the UK’s most ambitious financial services programmes. They work closely with business and technology leaders to drive strategic change, from platform modernisation and core systems reengineering, to cloud adoption and integration overhaul. Your Role You’ll be part of a highly credible, expert-led team shaping complex solutions across the full technology stack. Whether … modernising legacy systems, enabling cloud-first strategies, or improving end-to-end integration, you’ll bring structure, clarity, and delivery alignment to everything you do. What You’ll Be Doing as a Solution Architect: Lead the design and implementation of end-to-end solutions across application, integration, and infrastructure domains Shape and steer technology change across major … You’ll Bring as a Solution Architect: You’re a credible solution architect who thrives in fast-paced, high-compliance environments. You understand the realities of Financial Services, legacy complexity, data sensitivity, and the need to balance innovation with control. Key Experience: Deep experience in Financial Services (e.g. banking, insurance, wealth, or capital markets) Proven success delivering architecture More ❯

of multi-channel contact and resource planning strategies within a re-platformed branch network environment currently heavily focused on voice only. The role involves implementing and leveraging new telephony systems, tools, and technologies to enhance operational efficiency, improve customer experience, and deliver on business objectives. The Lead will be accountable for ensuring the successful adoption of new contact strategies … Re-platforming & Integration Represent the business in the execution of the telephony system re-platform, ensuring a seamless transition and optimal configuration as we migrate from legacy systems to new technologies. Work closely with IT, project management, and supplier to ensure successful integration of the new platform with existing systems and workforce management tools. Drive the … to the future Operating Model of the business and lead on recommendations to make contact management and resource planning a key discipline within the business. Skills & Experience 1. Telephony Systems Expertise Extensive experience working with telephony platforms and contact centre technologies (in particular, Microsoft Dynamics Contact Center). Familiarity with integrating telephony systems with advisor facing applications, data More ❯

testing strategies to ensure parity and quality. Assist in managing a hybrid Oracle/.NET environment during phased rollout. Contribute to BAU operations and the stability of the legacy system while migration activities are underway. Required Skills & Experience 5+ years of experience developing in Oracle PL/SQL, including deep knowledge of stored procedures, triggers, and packages. Proven … to work collaboratively in a cross-functional team environment. Strong problem-solving ability and attention to technical detail. Excellent communication skills, with the ability to document and explain complex systems clearly. Desirable Skills Experience working with legacy PHP systems and their integration with Oracle. Exposure to AI-assisted development tools for code analysis and migration. Familiarity More ❯

company is embarking on a greenfield NetSuite implementation to unify operations and drive scalability. Key Responsibilities Lead the end-to-end data migration process from multiple legacy systems into NetSuite. Develop and execute a robust data cleansing strategy to ensure accuracy, consistency, and completeness across all acquired entities. Define data mapping, transformation, and validation rules in collaboration More ❯

company is embarking on a greenfield NetSuite implementation to unify operations and drive scalability. Key Responsibilities Lead the end-to-end data migration process from multiple legacy systems into NetSuite. Develop and execute a robust data cleansing strategy to ensure accuracy, consistency, and completeness across all acquired entities. Define data mapping, transformation, and validation rules in collaboration 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 ❯

in Central London. This is a hybrid role, requiring 2-3 days per week in the office. This is a modern, digitally native business with no legacy systems - a rare opportunity to work in a clean, forward-thinking tech environment. You'll be joining a dynamic and fast-paced team that values innovation, adaptability, and continuous improvement. … GCP subject matter expert, with direct support from Google Contribute to the adoption of AI and emerging technologies post-migration Thrive in a fast-evolving environment with minimal legacy constraints Requirements : Proven experience as a Data Engineer. Hands-on experience with cloud migrations (on-prem to cloud or cloud-to-cloud). Strong knowledge of GCP, including BigQuery. More ❯

in Central London. This is a hybrid role, requiring 2-3 days per week in the office. This is a modern, digitally native business with no legacy systems - a rare opportunity to work in a clean, forward-thinking tech environment. You'll be joining a dynamic and fast-paced team that values innovation, adaptability, and continuous improvement. … GCP subject matter expert, with direct support from Google Contribute to the adoption of AI and emerging technologies post-migration Thrive in a fast-evolving environment with minimal legacy constraints Requirements : Proven experience as a Data Engineer. Hands-on experience with cloud migrations (on-prem to cloud or cloud-to-cloud). Strong knowledge of GCP, including BigQuery. More ❯

a 6 month contract to drive the successful delivery of business-critical transformation initiatives. As part of a major modernisation programme, the company is moving a number of legacy applications to the cloud , and the successful candidate will play a key role in delivering value through technology-enabled change. This is a great opportunity for a confident and … internal teams and third-party suppliers. Skills & Experience Required Proven experience delivering complex change in a regulated Financial Services environment. Strong knowledge of cloud migration and legacy systems transformation (Azure or AWS ideal). Confident managing cross-functional teams including technical, operational, and business SMEs. Hands-on experience with Agile and hybrid project delivery methodologies. Ability to More ❯

hybrid) We have partnered with a clothing retailer who are looking for a BI Analyst to add to the team. This client are currently migrating from legacy systems to the cloud, they need someone with advanced SQL skills including T-SQL. This opportunity is Greenfield in nature with the opportunity to have a wide remit and be More ❯

migration planning Work closely with clients to define technical requirements and provide architectural guidance Conduct health checks, performance tuning, and capacity planning of virtual environments Migrate legacy systems to modern virtual infrastructure (vSphere/Hyper-V to Azure, etc.) Document and support all solutions including HLDs and LLDs Collaborate with project managers, cloud architects, and network/ More ❯

Overview: Albany Beck is seeking a dynamic and experienced Lead PMO to support a major investment bank in delivering a high-impact, fast-paced change programme replacing a legacy core banking system. This role is ideal for someone with a strong background in PMO who thrives in environments with evolving processes and limited structure. If you’re hands More ❯

the UK’s leading retail organisations is seeking a contract Data Product Manager to join a strategic data migration programme , playing a critical role in transitioning legacy systems to a modern, governed data platform. 🔍 The Mission: Own and lead a core backend data platform during a major migration initiative - ensuring that data products are seamlessly and securely More ❯

international environment. This is not a “keep the lights on” role. We’re looking for a visionary technology leader with a proven track record in modernising legacy systems, managing strategic IT budgets, and building empowered, high-performing teams. Key Responsibilities: Drive a technology and AI-led transformation , delivering secure, scalable digital solutions. Lead global cybersecurity, data protection … IT programmes , vendor relationships, and risk management frameworks. Shape the organisation’s AI strategy and explore emerging technologies for impact. You’ll Bring: Deep knowledge of IT infrastructure, digital systems, and data governance . Expertise in UK/EU GDPR, ISO27001 , and cybersecurity best practices. Strong background in enterprise architecture and legacy system transformation. Strategic leadership experience More ❯

evolution of the DealCloud CRM platformdriving configuration, integration, and continuous improvement across the business. This is a hands-on, configuration-heavy role ideal for someone who thrives on aligning systems with business strategy in a fast-paced, data-rich environment. Key Responsibilities: Take ownership of the DealCloud CRM platform, managing configuration, user roles, workflows, and customisations. Optimise platform performance … by maintaining system integrations and monitoring reliability. Lead data migration from legacy systemsensuring high standards of accuracy, integrity, and consistency. Partner with Investment Bankers, Ops, Business Support and IT to translate business needs into platform solutions. Deliver an effective change and release management process to support ongoing platform evolution. Provide training, documentation, and first-line support to ensure … modern release processes. Excellent communication and stakeholder engagement skills. Experience in investment banking or financial services environments. Familiar with Microsoft Office Suite and standard business applications. Degree in Information Systems or similar (2:1 or above preferred). For a full consultation on this role please email your CV to Arc. More ❯