1 to 25 of 28 Legacy Systems Jobs in the City of London

while also being able to support delivery where required. The role is suited to someone who can think like a Solutions Architect, understand complex systems integration, and either guide existing development resources or contribute directly to development work themselves. Key purpose of the role The University is modernising … this system evolves, ensuring it can integrate effectively with a range of education-sector platforms and services. This will include working across multiple connected systems such as: room booking systems finance systems virtual learning environments other core educational platforms Key responsibilities Take a broad, solution-level view ...

Senior Data Engineer to support a multi-system, multi-client, company-wide migration. In this role, you will work closely with owners of legacy platforms to understand their data, then design and build the queries and processes required to migrate it into a new environment. As migration work … highly collaborative individual, as you will work closely with engineers and stakeholders across multiple teams. Key Responsibilities: Collaborate with engineers across legacy systems to understand available data and its structure. Design queries and scripts to extract, transform, and migrate data into new platforms. Partner with senior data ...

major clients in Global Media, Banking, Government, Telecoms & Utilities. The role Responsible for the design, development, implementation, and troubleshooting of audio and video systems and infrastructure, focusing on both legacy and cloud-based solutions Key responsibilities • Install, test, analyse, troubleshoot and modify new Audio & Video processing equipment … performance. • Design and drive processes to facilitate smooth and seamless deployment of new Audio & Video processing services. • Design, develop, and implement Audio & Video processing systems and solutions for broadcast and satellite communications, ensuring compliance with industry standards and regulatory requirements. • Supervise the delivery of 3rd party suppliers and contractors ...

functional specifications for WRICEF objects relating to reporting, interfaces, and reconciliations. Manage data migration of GL balances, open items, and consolidation structures from legacy systems. Run at least two full mock close cycles prior to go-live, ensuring reconciliation of trial balances and intercompany eliminations. Ensure integration with ...

About the Role We are seeking an experienced Modernization Solutions Architect to join a high-impact solutions team focused on transforming legacy systems into scalable, cloud-native architectures. This role involves designing and delivering end-to-end modernization strategies across mainframe, midrange, and distributed environments for global … remediation and re-hosting legacy applications using modern frameworks and containerization. Basic Qualifications 10+ years of hands-on technical experience with mainframe systems and technologies such as COBOL, JCL, Assembler, PL/I, RPG, Rexx, CICS, DB2, IMS DB, IMS DC, VSAM, Adabas/Natural Experience ...

containers, serverless, broader ecosystem) What They're Looking For Strong platform/solution architecture experience in modern cloud environments Background building scalable, distributed systems Ability to operate at a senior stakeholder level Strong communication and influencing skills A modern engineering mindset (not tied to legacy approaches … This Role Shape a next-generation platform, not maintain legacy systems High visibility with direct impact on business growth and platform direction Environment investing heavily in modern engineering and cloud If you think you have the necessary skills and experience then please apply now! McGregor Boyall ...

developing and delivering a range of projects for clients, mainly within the financial services sector and with a focus on migrating legacy systems to AWS and introducing CI/CD pipelines and cloud deployments. You'll join a collaborative team with a focus on engineering best practice … continuous improvement of client systems; you will have lots of business and client exposure, leading projects and providing expertise. Location/WFH: There's a hybrid work from home policy with three days a week in the London, City office (or at client sites), you'll join a friendly ...

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 ...

Hybrid) Sector: Specialty Insurance & Reinsurance Type: Permanent | Senior Leadership Are you a future-focused Solution Architect who thrives on tackling complex challenges, modernising legacy ecosystems, and influencing enterprise-wide technology strategy? A global, financially rock-solid specialty insurer is expanding its Architecture function and is looking … Opportunity Stands Out Enterprise influence – You’ll shape the roadmap for multiple business domains and play a key role in retiring legacy systems and designing modern, modular, cloud-ready platforms. True architecture ownership – From concept to approval, you are the accountable design authority for critical initiatives. Innovation ...

10+ systems. Experience within the loans or financial services domain. Familiarity with Oracle database integration patterns (relevant to CLASS and legacy systems). Knowledge of AWS integration services: Glue, DMS (Database Migration Service), or Step Functions ...

Responsibilities Analyse and assess data structures across legacy and target systems. Perform data extraction, transformation, and migration activities. Conduct data cleansing, enrichment, and validation to ensure high data quality. Identify and resolve data inconsistencies, duplicates, and quality issues. Develop and maintain data mapping documentation between source and target ...

implement omnichannel customer experiences that enhance engagement and drive market differentiation. Lead platform modernization efforts, ensuring a seamless transition from legacy systems to next-generation digital infrastructure. Risk Management & Compliance Establish robust governance structures to monitor, measure, and report transformation outcomes. Assess and mitigate transformation-related risks … Transformation Embed a transformation-driven mindset across all levels of the organization Develop comprehensive change management frameworks to facilitate smooth adoption of new processes, systems, and operational models. Engage stakeholders including C-suite executives, middle management, and frontline employees Stakeholder Engagement & Strategic Partnerships Act as the primary liaison between ...

digital transformation. This is a rare chance to join a "tech-first" business that is synonymous with innovation, moving away from legacy systems to build a truly modern, data-driven ecosystem. We are looking for a Salesforce Developer who thrives in an Agile, cross-functional engineering environment … business. Key Focus Areas: Full-Stack Development: Lead the build of sophisticated UI and backend logic using Lightning Web Components (LWC) and Apex . Systems Architecture: Manage complex data flows and integrations with external platforms, utilizing REST/SOAP APIs and modern middleware. Next-Gen Tech: Actively contribute ...

technical teams, supporting configuration, testing, and deployment activities Drive data migration, validation, and cleansing activities to ensure accurate transition from legacy systems into IFS Cloud Support UAT (User Acceptance Testing), training, and change management to ensure successful adoption across the organisation Provide ongoing post-go-live support ...

insurance broker to help recruit for an IT Project Manager to lead the delivery of a new insurance system and decommissioning of the legacy system. This will initially be a 6 month Fixed Term Contract with a maximum salary of up to £90,000 per year plus their ...

delivery constraints. Key Responsibilities Define and own the integration architecture across client-facing digital platforms, portals, and supporting systems. Assess existing legacy systems and design integration approaches that connect them effectively with modern platforms and APIs. Work closely with delivery, product, engineering, and business stakeholders to shape … background in integration architecture. Proven hands-on experience in client-facing digital/application environments, particularly client/advisor portals. Experience working across legacy and modern platforms, including APIs and integration patterns. Ability to document technical decisions and communicate them clearly to varied stakeholders. Comfortable operating in complex ...

underpins Outsmart’s crowdsourcing operations – a mature, revenue-generating system that has evolved over years and continues to scale. If you enjoy owning real systems, thinking architecturally, improving legacy code thoughtfully rather than rewriting it, and being trusted to deliver without heavy supervision, this role will feel … unusually well-matched. The role As Senior Fullstack Software Engineer, you will help design, build and maintain the production systems that power Outsmart’s platform. You’ll work closely with our CTO, operating as a high-agency individual contributor with genuine ownership across backend systems, infrastructure and platform ...

wider business. This role will play a key part in driving that change and supporting the ongoing development of the organisation’s HR systems landscape. The primary focus of the position is to support the newly implemented HR system, SAP SuccessFactors, alongside associated modules including Employee Central, Employee Central … Learning, Performance, and Onboarding. A strong emphasis will be placed on data, reporting, and analytics. This is an excellent opportunity for an experienced HR systems professional who enjoys working at the intersection of technology, people data, and process improvement. Key Responsibilities Support integration activities between HR systems ...

leading liquidity providers in Europe that is looking to expand its Trading platform team. The team focuses on both low level hardware systems and high-level architectural designs of large scale systems. The platform is built to be scalable, meaning you will work on developing largescale systems that … number of hours worked (free to work at your own pace and deliver quality work). There are no legacy systems or bureaucracy to hold you back, very flat structure, allowing everyone, including the CEO, to be hands-on. What you'll need: Excellent Rust or modern ...

6month OutsideIR35 (open to extensions) Start date- ASAP We’re looking for Senior Salesforce Developer to join a major transformation project replacing a legacy billing system with Zuora. What you’ll be doing: Leading development across Salesforce (Apex) Supporting the integration and rollout of Zuora ...

Transaction reporting ), is a market-leading solution for regulatory transaction reporting and reconciliation across global regimes. En:ACT automates reporting, reconciles data across systems, and maps errors directly to regulatory rules, helping firms remediate quickly, reduce risk, and meet regulatory obligations with confidence. Already trusted by more than … join at a pivotal stage as we modernize our data infrastructure, migrating from Python scripts and MySQL to Databricks and Snowflake. Our systems power regulatory reporting for major financial institutions, requiring precision, traceability, and reliability. What You'll Do Own the architecture, roadmap and delivery for our configuration-driven ...

relational database performance optimisation Experience working with Linux, Docker, and Git Proven experience leading technical initiatives across multiple teams Experience designing scalable, high-performance systems Experience working with legacy or monolithic systems and modernising them Strong understanding of API design and distributed systems Knowledge ...

rules, and wage types Time valuation and payroll control records Off-cycle payrolls, retroactivity, and corrections Support data migration from Legacy payroll systems to ECP Oversee payroll testing cycles (unit, integration, UAT, and parallel payroll runs) Integration & Data Flow Lead integrations between: Employee Central (EC) and Employee ...

Manager to take a leading role. This is a rare opportunity to drive a complex, multi-country rollout, moving from legacy ERP systems to Oracle Fusion Cloud across Finance and SCM , impacting over 12 countries globally with a strong European focus. The Role You’ll be responsible ...

output. The environment is TypeScript/JavaScript heavy , with some legacy PHP , so you will be working across both modern and existing systems while helping move the platform forward. Role: Senior Back End Engineer Salary: Up to £70,000 Location: Fully remote, UK-based What … doing: Building and maintaining backend APIs and services across a modern TS/JS stack Working alongside legacy PHP systems, helping evolve and modernise the platform Using AI engineering tools to accelerate development, debugging and delivery Designing scalable services and clean system boundaries Integrating third-party APIs ...