1 to 25 of 86 Legacy Systems Jobs in London

engineering performance across delivery, quality and technical standards, while helping shape the next phase of platform evolution. This includes modernising legacy systems, driving adoption of modern technologies and embedding AI-led efficiencies into both internal engineering workflows and customer-facing products. The Role Reporting directly … high-performing engineering function across multiple disciplines Own engineering delivery, release quality and technical execution Drive platform modernisation and migration from legacy systems to modern architectures Build scalable, modular, service-oriented systems and technical standards Oversee DevOps, infrastructure reliability, monitoring and release processes Foster strong collaboration ...

live trading. This is not a greenfield role. Success comes from adding value immediately within a large, demanding codebase — understanding existing Java and .NET systems well enough to reason about trade-offs, guide refactoring or selective rewrites, and make sound architectural decisions under pressure. The roadmap you produce … themselves. A strong candidate will actively embrace agentic AI tooling as a force multiplier — not just to accelerate development, but to rapidly comprehend unfamiliar systems, trace behaviour across services, uncover hidden dependencies, and validate architectural thinking. Combined with deep equities domain knowledge and experience building large-scale distributed systems ...

data workstream. Requirement for someone to lead the full data agenda across the programme lifecycle working across legacy systems, Workday, integrations and reporting requirements. Workday Data Lead, key responsibilities: Lead data workstream across full programme lifecycle Define and deliver data strategy - data plan for Workday Financials implementation … Understanding of finance data structures including master data Experience defining and managing data strategies and data plans Previously worked across multiple legacy systems and data sources Overseeing and coordinating technical teams Strong understanding of data quality and data controls Reasonable Adjustments: Respect and equality are core values ...

data workstream. Requirement for someone to lead the full data agenda across the programme lifecycle working across legacy systems, Workday, integrations and reporting requirements. Workday Data Lead, key responsibilities: Lead data workstream across full programme lifecycle Define and deliver data strategy - data plan for Workday Financials implementation … Understanding of finance data structures including master data Experience defining and managing data strategies and data plans Previously worked across multiple legacy systems and data sources Overseeing and coordinating technical teams Strong understanding of data quality and data controls Reasonable Adjustments: Respect and equality are core values ...

experienced engineer who possesses hands-on LogiInfo web application development expertise and is eager to play a vital role in transforming legacy systems into contemporary solutions. In this role, you will be crucial in understanding the existing application framework and ensuring a successful transition … application development.- Solid understanding of application architecture, backend services, and data management principles.- Proven ability to analyze and document legacy systems effectively.- Excellent communication skills for collaboration across technical and non-technical teams.- Experience with custom-built platforms and modern web stacks is a plus.If ...

experienced engineer who possesses hands-on LogiInfo web application development expertise and is eager to play a vital role in transforming legacy systems into contemporary solutions. In this role, you will be crucial in understanding the existing application framework and ensuring a successful transition … application development.- Solid understanding of application architecture, backend services, and data management principles.- Proven ability to analyze and document legacy systems effectively.- Excellent communication skills for collaboration across technical and non-technical teams.- Experience with custom-built platforms and modern web stacks is a plus.If ...

play a pivotal role. This is a high-impact position where you’ll lead the end-to-end migration from legacy billing systems to a modern, scalable platform , while owning the digital billing experience across customer channels. You’ll sit at the intersection of product, technology … billing migration strategy and execution Own the migration roadmap, including dependencies, risks, and key milestones Oversee transition from legacy systems with minimal/no customer disruption Ensure pricing integrity, service continuity, and regulatory compliance throughout Proactively resolve product, billing, and integration challenges Digital Product Ownership Own billing ...

play a pivotal role. This is a high-impact position where you'll lead the end-to-end migration from legacy billing systems to a modern, scalable platform, while owning the digital billing experience across customer channels. You'll sit at the intersection of product, technology … billing migration strategy and execution Own the migration roadmap, including dependencies, risks, and key milestones Oversee transition from legacy systems with minimal/no customer disruption Ensure pricing integrity, service continuity, and regulatory compliance throughout Proactively resolve product, billing, and integration challenges Digital Product Ownership Own billing ...

play a pivotal role. This is a high-impact position where you'll lead the end-to-end migration from legacy billing systems to a modern, scalable platform , while owning the digital billing experience across customer channels. You'll sit at the intersection of product, technology … billing migration strategy and execution Own the migration roadmap, including dependencies, risks, and key milestones Oversee transition from legacy systems with minimal/no customer disruption Ensure pricing integrity, service continuity, and regulatory compliance throughout Proactively resolve product, billing, and integration challenges Digital Product Ownership Own billing ...

DevOps Engineer to join a growing engineering capability and play a central role in shaping how AI is Embedded into real, production-grade software systems . This is not a traditional people-management role . Instead, you'll lead through technical depth, architectural judgement, and delivery experience by setting … capabilities are integrated into modern software platforms. If you enjoy working where architecture, APIs, DevOps, and AI meet , and you care about building systems that are secure, operable, and genuinely useful, this role offers the chance to have real impact. What you'll be doing Your focus will ...

leading the resolution of structural platform issues. Leveraging strong integration expertise, you will design and manage complex data mappings across legacy systems, middleware, and modern platforms, while maintaining clear, high‐quality architecture documentation to support long‐term operational ownership. Responsibilities Architecture Blueprint Delivery Produce high‐quality High … Level Designs (HLDs) and Low‐Level Designs (LLDs) across core platforms including Digital Transaction Systems (DTS), EPOS, and other strategic programmes. Designs must be detailed, unambiguous, and set the contractual delivery standard for external vendors. Vendor Governance & Quality Assurance Perform structured reviews and audits of vendor‐delivered architecture ...

Senior Systems Integration Consultant (.NET, Azure, Data, MIS) Job Description Contract Length: 3 months Start: Immediate Day Rate: £400-£500 per day IR35: Outside IR35 Location: Hybrid, predominantly remote Overview We are looking for a senior Systems Integration Consultant to step into a live environment and stabilise … ensure the platform is fully operational. Key Responsibilities Stabilise and optimise Mitratech platform integration Extract and migrate data from legacy .NET systems Build and troubleshootintegrations across: Timesheet systems HR workflows including Excel exports Internal operational systems Implement workflow automation and triggers Debug live production issues ...

Description Senior Systems Integration Consultant (.NET, Azure, Data, MIS) Job Description Contract Length: 3 monthsStart: ImmediateDay Rate: £400-£500 per dayIR35: Outside IR35Location: Hybrid, predominantly remote Overview We are looking for a senior Systems Integration Consultant to step into a live environment and stabilise a newly implemented … ensure the platform is fully operational. Key Responsibilities Stabilise and optimise Mitratech platform integration Extract and migrate data from legacy .NET systems Build and troubleshootintegrations across: Timesheet systems HR workflows including Excel exports Internal operational systems Implement workflow automation and triggers Debug live production issues ...

provides strategic and operational leadership for the HFEAs cloud environments, infrastructure, networks, and cyber security functions, ensuring best practices are followed so the HFEAs systems are secure and effective as possible. You will have direct responsibility for a team of two (IT Service & Systems Manager and IT Support … Outstanding Workplace Award. Job description Job responsibilities The HFEA is currently undergoing a significant period of change to our core legacy systems and moving to modern cloud-based native environments. The systems are a mix of Azure Virtual Machine workloads, native Azure Cloud Services and enterprise ...

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 ...

integrations Working with large-scale SQL datasets for analytics and reporting Developing automation workflows using RPA technologies including UiPath Bridging legacy systems with modern Microsoft cloud platforms Supporting governance, GDPR compliance, and responsible AI usage Collaborating with senior stakeholders to shape data and AI initiatives Supporting colleagues ...

Lead Data Engineer Hands-on technical leadership building data systems that actually work We're looking for a Lead Data Engineer to join an enterprise data engineering capability and play a critical role in designing, building, and improving real-world data systems . This is not a line … engineers and adjacent roles through design decisions, code, and delivery support Improve data sharing, onboarding of new data sources, and interoperability across teams and systems Introduce and evaluate new tools, patterns, and technologies where they genuinely add value - balancing innovation with pragmatism Build robust, production-grade solutions , not proofs ...

What You'll Be Doing Define and own the platform architecture strategy across multiple teams and regions Drive the transition from legacy systems to cloud-native architecture Ensure systems are scalable, resilient, and built for long-term growth Partner closely with engineers to embed modern development … platform is built and evolves Technology Environment Backend: TypeScript (Node.js) Frontend: JavaScript/React Cloud: AWS (containers, serverless, wider ecosystem) Architecture: Distributed systems, microservices, cloud-native design What They're Looking For Proven experience as a Platform/Solution Architect in modern cloud environments Strong background building scalable, distributed ...

Description Lead Data Engineer Hands-on technical leadership building data systems that actually work We're looking for a Lead Data Engineer to join an enterprise data engineering capability and play a critical role in designing, building, and improving real-world data systems. This is not a line-management … engineers and adjacent roles through design decisions, code, and delivery support Improve data sharing, onboarding of new data sources, and interoperability across teams and systems Introduce and evaluate new tools, patterns, and technologies where they genuinely add value - balancing innovation with pragmatism Build robust, production-grade solutions, not proofs ...

primary link between technical delivery and business value within the Wealth and Life domains. You are responsible for ensuring that the transition from legacy reporting (Business Objects, SSRS, Qlik) to the Hydra Power BI layer preserves institutional memory and meets the specific regulatory and operational needs … lineage visibility.* Data Interrogation: Strong SQL skills to perform cross-system validation between Oracle EDW and the Hydra Azure Landing Zone.* Legacy Systems: Familiarity with the semantic layers and report structures of Business Objects (Universes), SSRS, and QlikView/QlikSense.* Microsoft Certified: Power BI Data Analyst Associate ...

primary link between technical delivery and business value within the Wealth and Life domains. You are responsible for ensuring that the transition from legacy reporting (Business Objects, SSRS, Qlik) to the Hydra Power BI layer preserves institutional memory and meets the specific regulatory and operational needs … lineage visibility. * Data Interrogation: Strong SQL skills to perform cross-system validation between Oracle EDW and the Hydra Azure Landing Zone. * Legacy Systems: Familiarity with the semantic layers and report structures of Business Objects (Universes), SSRS, and QlikView/QlikSense. * Microsoft Certified: Power BI Data Analyst Associate ...

with C-suite stakeholders, global engineering teams, and external partners to embed AI-first thinking, accelerate innovation, and shape the future of intelligent enterprise systems-including emerging paradigms such as the agentic web. Key Responsibilities Strategic Leadership & Governance Define and execute the enterprise-wide AI & Intelligent Automation strategy Establish … deployments using Kubernetes, Docker, and Infrastructure-as-Code Enterprise Integration (.NET Focus) Integrate AI capabilities into enterprise-grade .NET ecosystems Modernise legacy systems using microservices, APIs, and event-driven architectures Embed DevSecOps best practices across all engineering workflows Intelligent Automation Drive enterprise automation using tools like Power ...

interaction with business stakeholders. This is a high-impact opportunity suited to engineers who go beyond BAU development - individuals who enjoy building and improving systems, while taking ownership of production platforms and driving meaningful change in complex environments. Key Responsibilities: Design, build, and enhance middle office systems supporting … business teams (operations, finance, client services) to understand requirements and translate them into technical solutions Contribute to reengineering and modernisation of legacy systems, improving performance, scalability, and resilience Take ownership of production systems, including: Investigating and resolving issues Improving monitoring, logging, and reliability Write clean, well ...

Title: Engineering Lead (C++) - Low Latency/Trading Systems Location: London (Hybrid) Overview Our client is a global fintech operating at scale across trading, risk, and market connectivity. They are hiring an Engineering Lead (C++) to take ownership of a business-critical platform sitting at the heart of real … Define and deliver a clear technical and product vision Improve release processes, reducing downtime and increasing deployment frequency Drive modernisation across legacy systems, infrastructure, and tooling Collaborate closely with trading, quant, and risk stakeholders Remain hands-on, contributing to production-grade C++ code What They're Looking ...

Platform tooling Proven delivery in enterprise-scale, multi-system integration programmes Experience integrating Salesforce, SAP, ServiceNow, AWS/Azure, databases, and legacy systems Working knowledge of OAuth 2.0, JWT, mTLS/SSL/TLS, API policies, and API security best practice Familiarity with Runtime Fabric and/ ...