26 to 50 of 189 Legacy Systems Jobs in London

scalable services using Python as the primary backend language, while supporting existing services built in Java and .NET. Maintain and enhance legacy systems using Oracle SQL PL. Implement Test-Driven Development (TDD) practices, ensuring automated tests are written prior to code development. Work with complex data challenges ...

ecosystem. Your responsibilities: Architect and implement solutions using Azure services for data ingestion, transformation, storage, and analytics Develop modernization roadmaps for legacy systems to Azure Data Platform Design data governance and security frameworks ensuring compliance with organizational and regulatory standards Collaborate with stakeholders to define functional ...

ecosystem. Your responsibilities: Architect and implement solutions using Azure services for data ingestion, transformation, storage, and analytics Develop modernization roadmaps for legacy systems to Azure Data Platform Design data governance and security frameworks ensuring compliance with organizational and regulatory standards Collaborate with stakeholders to define functional ...

staff. We are seeking an SC Cleared Data Analyst to join our growing team and play a key role in modernising legacy systems and enabling data-driven transformation. What you'll do: Analyse existing legacy data structures, schemas, and relationships to understand current state. Document … data lineage, tracing where data originates and how it flows through systems. Create mapping documents between legacy data fields and new system fields to support migration. Define and implement strategies for data migration, ensuring accuracy and efficiency. Identify obsolete or redundant data that can be archived or removed. ...

platforms, applications and data landscapes. We are seeking an experienced Enterprise Architect to define and implement a group-wide architecture strategy that unifies these systems within a cohesive, scalable and future-ready environment, enabling us to accelerate innovation in a secure and scalable manner. We're seeking strong expertise … Develop and maintain a unified enterprise architecture framework that spans all acquired businesses Define standards and blueprints for integration, data architecture, and core enterprise systems Integration & Consolidation Lead the design of integration strategies to connect disparate platforms, applications, and processes across the group and with external third-parties Oversee ...

support a major, multi-year MOD information and knowledge management programme. The programme is focused on migrating several disparate legacy systems onto a MOD-hosted enterprise Product Lifecycle Management (PLM) solution and has already delivered an initial MVP. You will be embedded client-side within ...

integration layers (OIC) to curate clean, well-modelled datasets. Contribute to data migration activities, ensuring accuracy, integrity and auditability throughout transitions from legacy systems. Apply security-by-design, access controls and logging appropriate for regulated MOD environments. Operate in Agile delivery squads with APEX devs, data engineers, integration ...

integration layers (OIC) to curate clean, well-modelled datasets. Contribute to data migration activities, ensuring accuracy, integrity and auditability throughout transitions from legacy systems. Apply security-by-design, access controls and logging appropriate for regulated MOD environments. Operate in Agile delivery squads with APEX devs, data engineers, integration ...

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 … 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 ...

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 … 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 ...

team on a key technology project. This role involves significant stakeholder engagement and the coordination of multiple project streams to replace legacy systems and streamline processes. Day-to-day of the role: Lead the delivery of the project which involves replacing legacy indoor workload tools ...

trillion on benefits every year. It’s their second-largest cost after payroll — yet the entire category is still running on legacy systems and outdated assumptions. The space is primed for transformation: despite its scale, it’s been almost completely overlooked by AI-first startups. Incumbents — including … resident expert. You won't just be tuning hyperparameters in a notebook; you will be a core software engineer architecting the complex systems that make AI useful in production. In the immediate future, your time will be split between crafting complex AI processing architectures (40%) and hands-on data ...

trillion on benefits every year. It’s their second-largest cost after payroll — yet the entire category is still running on legacy systems and outdated assumptions. The space is primed for transformation: despite its scale, it’s been almost completely overlooked by AI-first startups. Incumbents — including … resident expert. You won't just be tuning hyperparameters in a notebook; you will be a core software engineer architecting the complex systems that make AI useful in production. In the immediate future, your time will be split between crafting complex AI processing architectures (40%) and hands-on data ...

Senior Data Engineer to help them scale fast. You’ll own critical data engineering projects, including a major migration from legacy systems to modern cloud platforms, and build the pipelines that power machine learning and real-time decision-making. What You’ll Do Design and optimize … work truly matters 💡 If you’re a Senior Data Engineer who wants to make a difference , thrive in a startup environment , and work on systems that matter , let’s talk. Drop me a message or email: kumbirai.mafini@opusrs.com ...

Senior Data Engineer to help them scale fast. You’ll own critical data engineering projects, including a major migration from legacy systems to modern cloud platforms, and build the pipelines that power machine learning and real-time decision-making. What You’ll Do Design and optimize … work truly matters 💡 If you’re a Senior Data Engineer who wants to make a difference , thrive in a startup environment , and work on systems that matter , let’s talk. Drop me a message or email: kumbirai.mafini@opusrs.com ...

Microsoft Dynamics, Bloomreach and Hightouch. Key Responsibilities: Define and lead the solution design and architecture for CRM, Customer Data Platform (CDP), and marketing technology systems Manage and ensure smooth data migration from legacy systems Collaborate with external implementation partners and internal stakeholders including Sales, Service, Membership ...

critical assignment for a Database Migration Engineer. This role sits within their Technology and Digital Services function and will lead the conversion of legacy Microsoft Access databases into modern data platforms built on SQL Server and SharePoint. You will take ownership of end-to-end migration activity, working … processes, or wider Microsoft data/Power Platform tooling This assignment forms part of a wider modernisation programme aimed at replacing legacy systems with secure, maintainable environments. You will be joining at a critical point, with scope to directly influence the success and pace of delivery. ...

strategy, delivery, and scale across low-latency trading systems. This hire will drive a major AWS migration, build greenfield environments, modernise legacy systems, and shape the long-term engineering roadmap. You’ll lead a small but senior infrastructure function with real autonomy and impact. The Role … architecture and hybrid (cloud + on-prem) experience Deep networking background: routing, switching, low-latency connectivity Strong understanding of reliability engineering and autoscaling systems Prior experience building and scaling teams in high-performing environments Confident interacting with technical and trading leadership Core Skills AWS (VPC, IAM, S3, ECS/ ...

strategy, delivery, and scale across low-latency trading systems. This hire will drive a major AWS migration, build greenfield environments, modernise legacy systems, and shape the long-term engineering roadmap. You’ll lead a small but senior infrastructure function with real autonomy and impact. The Role … architecture and hybrid (cloud + on-prem) experience Deep networking background: routing, switching, low-latency connectivity Strong understanding of reliability engineering and autoscaling systems Prior experience building and scaling teams in high-performing environments Confident interacting with technical and trading leadership Core Skills AWS (VPC, IAM, S3, ECS/ ...

improvement. You'll be part of a wider team but will be taking full responsibility for your environment. The Role You'll support Legacy and modern application infrastructure, working with .NET and SQL-based systems. You'll manage deployments, troubleshoot issues, and drive improvements to efficiency and reliability. …/CD pipelines across development, testing, and production environments Deploy and support .NET applications, SQL Server databases, and SSIS packages Troubleshoot Legacy systems and identify opportunities for modernisation Collaborate with remote teams while managing all local DevOps responsibilities Support Scripting and automation efforts using tools such ...

Backend Software Engineer you will design and develop high throughput backend services for microsecond real-time risk, pricing, trading engines and market making systems, working across the full software development lifecycle using Rust (and some C++ for legacy systems). You'll collaborate with a small … talented team, problem solving and working on complex and challenging systems with interesting work. Location/WFH: You'll join the team in Central London with flexibility to work from home 1-2 days a week. About you: You have strong backend OOP, multithreaded software engineering experience with C++ ...

Backend Software Engineer you will design and develop high throughput backend services for microsecond real-time risk, pricing, trading engines and market making systems, working across the full software development lifecycle using Rust (and some C++ for legacy systems). You'll collaborate with a small … talented team, problem solving and working on complex and challenging systems with interesting work. Location/WFH: You'll join the team in Central London with flexibility to work from home 1-2 days a week. About you: You have strong backend OOP, multithreaded software engineering experience with C++ ...

data centres and cloud environments. Key focus areas include: Leading the migration from Nomad to Kubernetes across a hybrid infrastructure environment Designing highly available systems that support real-time trading operations Expanding the firm's cloud footprint (AWS/Azure/GCP) while maintaining on-prem capabilities Owning projects … from design through production What you'll need: Production experience with Kubernetes (EKS/AKS/GKE or bare-metal) Strong Linux systems background; Windows experience is beneficial Track record delivering cloud migrations and managing hybrid environments Experience supporting mission-critical, highly available systems What makes this different ...

data centres and cloud environments. Key focus areas include: Leading the migration from Nomad to Kubernetes across a hybrid infrastructure environment Designing highly available systems that support real-time trading operations Expanding the firm's cloud footprint (AWS/Azure/GCP) while maintaining on-prem capabilities Owning projects … from design through production What you'll need: Production experience with Kubernetes (EKS/AKS/GKE or bare-metal) Strong Linux systems background; Windows experience is beneficial Track record delivering cloud migrations and managing hybrid environments Experience supporting mission-critical, highly available systems What makes this different ...

daily by investment, risk, finance, and operations. You will play a pivotal role as the firm continues its migration away from legacy systems and enhances its bespoke internal platforms. The Role As a Business Engineering Developer, you will: Build, enhance, and maintain applications supporting mortgage origination, valuation … problem-solving Significant influence across the organisation You will join at a time of major investment in technology, with clear opportunities to contribute to systems that will define the firm’s next decade. What We’re Looking For Strong Python skills (pandas, NumPy, SQLAlchemy, etc.) Experience working in business ...