1 to 25 of 67 Legacy Systems Jobs in Central London

technologies Ability to recommend solutions to improve new and existing database systems. Assess data implementation procedures to ensure they comply with internal and external regulations. Install and organize information systems to guarantee functionality. Prepare accurate database design and architecture reports for management and executive teams. Oversee the migration of data from legacy systems to new solutions. … Educate staff members through training and individual support. Offer support by responding to system problems in a timely manner. Requirements: Strong knowledge of database structure systems and data mining. Knowledge of systems development, including system development life cycle, project management approaches and requirements, design and testing techniques Proficiency in data modeling and design, including SQL development and database More ❯

technologies. Ability to recommend solutions to improve new and existing database systems. Assess data implementation procedures to ensure they comply with internal and external regulations. Install and organize information systems to guarantee functionality. Prepare accurate database design and architecture reports for management and executive teams. Oversee the migration of data from legacy systems to new solutions. … Educate staff members through training and individual support. Offer support by responding to system problems in a timely manner. Qualifications : Strong knowledge of database structure systems and data mining. Knowledge of systems development, including system development life cycle, project management approaches and requirements, design and testing techniques. Proficiency in data modeling and design, including SQL development and database More ❯

technologies Ability to recommend solutions to improve new and existing database systems. Assess data implementation procedures to ensure they comply with internal and external regulations. Install and organize information systems to guarantee functionality. Prepare accurate database design and architecture reports for management and executive teams. Oversee the migration of data from legacy systems to new solutions. … Educate staff members through training and individual support. Offer support by responding to system problems in a timely manner. Requirements: Strong knowledge of database structure systems and data mining. Knowledge of systems development, including system development life cycle, project management approaches and requirements, design and testing techniques Proficiency in data modeling and design, including SQL development and database More ❯

technologies Ability to recommend solutions to improve new and existing database systems. Assess data implementation procedures to ensure they comply with internal and external regulations. Install and organize information systems to guarantee functionality. Prepare accurate database design and architecture reports for management and executive teams. Oversee the migration of data from legacy systems to new solutions. … Educate staff members through training and individual support. Offer support by responding to system problems in a timely manner. Requirements: Strong knowledge of database structure systems and data mining. Knowledge of systems development, including system development life cycle, project management approaches and requirements, design and testing techniques Proficiency in data modeling and design, including SQL development and database More ❯

an experienced Data Analyst to join a high-impact digital transformation project within a secure government environment. This role focuses on the consolidation and migration of legacy systems into a new, centralised ERP platform . You’ll play a key role in mapping, transforming, and validating large datasets across multiple departments, ensuring data integrity and compliance throughout … the migration lifecycle. Key Responsibilities: Analyse and profile data across legacy systems to understand current data structures and quality Work closely with business users and technical teams to define and document data requirements Support data mapping, transformation, and cleansing processes to prepare for ERP migration Identify data inconsistencies, risks, and remediation strategies Build data validation rules and … Analyst on ERP or large-scale system migration projects ✅ Strong SQL skills and familiarity with Excel, Power BI or other data visualisation tools ✅ Experience working with legacy systems and integrating into modern ERP platforms (e.g., Oracle, SAP, Workday, Unit4, etc.) ✅ Knowledge of data governance and data quality best practices ✅ Excellent communication and stakeholder engagement skills ✅ Active SC More ❯

a new core banking and wealth platform using Avaloq for a leading Wealth Management firm. This strategic transformation programme aims to modernise and streamline front-to-back operations, consolidate systems, and enhance digital capabilities across the client lifecycle. As part of this large-scale implementation, a dedicated Data Migration Lead is required to own and drive the end-to … to Avaloq (desirable but not essential). Strong knowledge of data migration methodologies including data mapping, extraction, cleansing, transformation, reconciliation, and cutover planning. Experience working with legacy systems and managing complex data landscapes including customer, account, transaction, product, and portfolio data. Understanding of the regulatory and operational implications of data handling in financial services, particularly within private … and GDPR/compliance considerations related to data migration. Experience managing third-party vendors and coordinating across multi-functional project teams. Skills Data analysis, profiling, and mapping across multiple systems End-to-end data migration planning and execution Defect management, reconciliation, and exception handling Strong documentation and communication skills for both technical and non-technical audiences Advanced stakeholder management More ❯

functionalities and integrations within Endur. Provide training and support to end-users to ensure efficient use of the platform. Assist in migrating data and transitioning from legacy systems to Endur. Collaborate with project managers and IT teams to deliver projects on time and within budget. Stay updated with the latest updates and features of the Endur platform. More ❯

also laying the groundwork for future innovation. The work involves improving how payments are processed and managed across a large-scale financial environment, helping to modernise legacy systems and support broader financial inclusion. Requirements: Business Process Modelling: Ability to create models that represent business processes, workflows, and systems utilising the BPMN notation and Visio. Outputs Required More ❯

standards, capturing of data and trend predictions, which can be leveraged in order to proactively mitigate emerging risks and avoid non-quality Impacts. From fragmented legacy IT systems holding unreliable data to an integrated R&D and SUPPLY digital & data ecosystem with respective sub-domains to enact step-change operational efficiency and maximize business value by confidently More ❯

part of their OneStream implementation. This newly created position will see this individual maintaining, Supporting and developing OneStream on both Planning and Consolidation and work collaboratively with the broader systems team who will be transitioning from their legacy system. This role ensures the smooth functioning of the platform, supporting processes in Financial Planning & Analysis (FP&A), consolidation … IFRS) and financial reporting. Skills: Must have strong knowledge of the OneStream platform, particularly in the areas of financial consolidation, planning, and reporting. Experience in managing and maintaining financial systems and databases. Strong analytical and problem-solving skills, with the ability to troubleshoot complex system issues. Proficient in system integration, data management, report development and financial reporting. Excellent communication … for querying and managing data. Must demonstrate solid experience writing business rules Familiarity with integrations (APIs, data loading tools) and cloud-based systems. Knowledge of financial software and ERP systems is beneficial. For more information on this or other EPM roles across the UK, please contact Chanel Betambeau More ❯

with Project and Product Roadmaps. Provide accurate progress reports to clients and internal stakeholders. Oversee user testing, issue management, and prioritization. Ensure smooth data migration from legacy systems to target solutions. Manage scope, risks, and changes, ensuring alignment with the agreed solution and business case. Collaborate with internal teams, mentor junior members, and drive process improvements. Qualifications … Strong experience in Project Management, particularly in Agile environments. Knowledge of front, middle and back office Background in Trading Systems Proven ability to manage complex projects and deliver high-quality results. Excellent communication and stakeholder management skills. Experience with data migration and user testing. 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 ❯

and monitoring Clear communicator, comfortable with cross-functional teams Desirable Experience APIs from major financial data providers dbt, Snowflake Kafka, Airflow Java feedhandler support Migration of legacy systems (e.g. MATLAB) This position offers a competitive compensation package and hybrid working model. More ❯

Strong knowledge of finance processes, including accounting, financial reporting, and budgeting, and how these map to D365. Experience supporting or leading ERP system migrations, particularly from legacy systems to D365. Skilled in gathering, analysing, and documenting business requirements, and translating them into functional specifications and system solutions. Excellent problem-solving abilities with a track record of identifying … business needs and deliver effective solutions. Assess and solve complex finance-related problems by applying industry best practices and technology solutions. Support the migration from legacy finance systems to a new platform, ensuring smooth transition and minimal disruption. Analyse and understand matured finance processes and adapt them to the new platform, leveraging your expertise to enhance business More ❯

will be part of a collaborative and innovative environment, supporting the FX Options Trading business. The team focuses on developing cutting-edge solutions while transitioning from legacy systems, and this is an exciting opportunity to work on high-impact projects in a fast-paced front office environment . Key Responsibilities: Develop, deploy, and support front-office applications … Making, and Trade Booking. Collaborate closely with brokers, external clients, and business partners to expand and improve electronic offerings. Ensure system integration with upstream trade execution platforms and enhance systems to meet regulatory requirements (MiFID II, UMR, IMM). Liaise with teams across Trading, Sales, Market Risk, and Operations to gather requirements and implement key changes. Support and develop More ❯

As the Enterprise Security Architect, you’ll own the definition and implementation of enterprise-wide security architecture. You’ll be responsible for designing strategies and frameworks that secure critical systems and services, spanning both on-premise and cloud environments. You’ll also play a hands-on leadership role in mentoring solution and technical architects, ensuring security is a foundational … business and technology strategies into security-focused architecture patterns Design and maintain conceptual and logical security architectures across multiple technology domains Support secure delivery of cloud and on-premise systems (Oracle, Microsoft, Salesforce, MuleSoft) Guide solution and technical architects on security principles, best practices, and assurance Contribute to architecture governance, standards, and documentation Partner with product, digital, data, finance … an Enterprise or Security Architect in complex environments Strong understanding of enterprise security frameworks, governance, and risk management Experience delivering secure architectures in cloud, hybrid, and legacy systems Hands-on knowledge of modelling tools and frameworks (UML, ArchiMate, Bizz design ideal) Broad technical knowledge across infrastructure, data, CRM, HR, and finance systems Strong communication and stakeholder More ❯

this role is to facilitate the seamless, efficient, and effective migration of applications from the current technology stack to a modernized platform. This includes upgrades to the latest operating systems, database versions, and associated infrastructure components. The role is pivotal in ensuring that the migration process is technically sound, strategically aligned, and executed with minimal disruption to business operations. … versatile Technical Scrum Master with deep expertise in Agile methodologies to support a major application migration initiative. This role is essential in driving the transformation of legacy systems into a modern, scalable, and secure technology environment. The ideal candidate will be an experienced professional who is comfortable working in close partnership with a diverse range of global … to the Software Development Life Cycle (SDLC). The role contributes directly to the execution of the IT Strategy, supports revenue-generating and regulatory initiatives, and ensures that IT systems provide a competitive edge. Additionally, the role actively promotes Diversity and Inclusion across all aspects of the development lifecycle and team dynamics. Position Description Lead and manage Agile scrums More ❯

twentyAI are partnering with a globally renowned law firm currently undergoing a major digital and data transformation. With a deep-rooted legacy in legal excellence and a strong global footprint, the firm is currently modernising their data capability and building a new data platform. About the Role You will be part of a diverse group of engineers and … adopting best practices and integrating security controls in pipelines. Identify bottlenecks and optimise performance across data pipelines and cloud infrastructure. Participate in the ongoing migration from legacy systems to modern data platforms. Your Background Experience with Microsoft Azure data tools — especially Data Factory and Synapse. Familiarity with Microsoft Fabric will be beneficial. Otherwise, experience with platforms like …/CD pipelines in a data engineering context. Practical knowledge of distributed processing frameworks, particularly Spark. Comfortable working in a complex environment that is evolving from legacy systems toward a modern data architecture. Strong problem-solving skills and the ability to work collaboratively in a cross-functional agile team. Exposure to data governance, security, and compliance principles More ❯

As the Enterprise Architect for Applications , you’ll be responsible for designing the future state of the application estate, guiding the organisation as it transitions from legacy systems to modern, service-oriented architectures. You will provide architectural guardrails for solution delivery teams, mentor architects and technical leads, and work closely with cross-functional teams to ensure alignment … applications (Oracle, Microsoft, Salesforce, MuleSoft) Guide and mentor solution and technical architects to ensure high standards of application design Collaborate with teams across digital, data, CRM, finance, and HR systems Participate in architecture governance groups and project boards Promote continuous improvement of application platforms and tooling Monitor technology trends and recommend relevant innovations Support the development of business cases … microservices) Knowledge of architecture modelling tools and frameworks (e.g. UML , ArchiMate , Bizz design ) Familiarity with data structure concepts and relational databases (SQL Server, Oracle, MySQL) Broad understanding of enterprise systems (CRM, Finance, HR, integration platforms) Strong communication and stakeholder management skills Experience with architecture assurance, governance, and version-controlled repositories Strategic mindset with a hands-on approach to delivery More ❯

customers, and global teams (including a team in Bulgaria) Own and influence technical design, architecture, and best practices Support and develop engineers through mentoring and technical guidance Balance legacy system understanding with innovation in new platforms Work closely with stakeholders across engineering, product, and leadership Tech Stack Backend: .NET Core 8/9, Azure Cloud Frontend: React, Typescript … Experience working on a SaaS product Team Setup UK Engineering Team: 5 engineers (plus a team of contractors), with plans to grow Bulgaria Team: 7 engineers (focused on legacy product support) DevOps: Small, cross-functional team supporting all projects Salary & Benefits: Competitive base salary: up to £130,000 Bonus 10-15% Private healthcare coverage Company pension scheme More ❯

design patterns API Development Building and maintaining RESTful APIs Solid understanding of HTTP protocols, status codes, headers, etc. API documentation using tools like Swagger/OpenAPI Legacy Systems Exposure to or experience with WCF services — we still support some older systems, so comfort working with a mix of modern and legacy tech is key 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 ❯

ELT pipelines for both real-time and batch processing. Design and manage data storage solutions across databases, warehouses, and data lakes. Integrate data from APIs, streaming platforms, and legacy systems. Optimize data infrastructure for performance, cost, and observability. Implement data governance, access control, and security best practices. Collaborate with engineering and business teams to deliver high-impact solutions. More ❯

s London team. This is a high-impact role involving the design, development, and deployment of backend services that power our client’s security platform. You’ll work on systems at significant scale, leading both engineering efforts and mentoring team members, while collaborating with globally distributed teams in the US, Ireland and India. Responsibilities: Design, develop, and maintain Java … using Spring Boot , REST/GraphQL , Kafka , PostgreSQL , and RabbitMQ . Contribute to infrastructure modernisation efforts, working closely with DevOps teams on Kubernetes , CI/CD pipelines , and legacy system migrations. Innovate across the stack, taking ownership of key projects and delivering performant, scalable solutions. Lead engineering best practices including coding standards, unit testing, code reviews, and system … Kibana , Hadoop/HBase , OpenSearch , or VPN/proxy architectures. Strong grasp of software security principles , system performance optimisation, and infrastructure reliability. Experience working on large-scale , production-grade systems with distributed architectures. Ideal Candidate will: Bring technical vision , initiative, and a passion for exploring and implementing emerging technologies. Are a natural technical leader with experience mentoring engineers and More ❯

Our global client is looking for a D365 F&O specialist with extensive expeirence migrating from legacy to D365 F&O. This is a hybrid role outside … IR35 initially for 9 months with a good chance to extend. Data Migration Lead tasked with overseeing the planning, execution, and management of data transfers from legacy systems to Microsoft Dynamics 365. Responsibilities include ensuring data accuracy, consistency, and compliance with business needs throughout the entire migration lifecycle." Strong understanding of data migration principles and best practices. … techniques. Experience in delivering D365F&O and integration using Azure services. Successfully migrated Dynamics 365 F&O multiple times, with proven experience leading data migration from legacy systems to D365. More ❯