26 to 50 of 166 Legacy Systems Jobs in London

provide technical guidance and oversight of customisations, including plugins, workflows, Power Automate flows, and JavaScript, ensuring efficient, reusable, and well-documented code.* Integrate D365 CE with other applications and systems using tools like Azure Logic Apps, Power Automate, and custom APIs.* Oversee the Dynamics 365 environment to enable the successful delivery of their Digital Transformation.* Manage and control D365 … and maintenance for D365 CE applications, troubleshoot issues, and implement fixes and enhancements.* Assist in data migration tasks, ensuring accurate and secure transfer of data from legacy systems to D365 CE* Collaborate with cross-functional teams, including business analysts, project managers, and other developers, to deliver high-quality solutions.* Stay updated with the latest D365 CE features More ❯

be working on the latest and most cutting edge tech from the outset. If you are an expert in and passionate about designing and configuring Dynamics 365 Business Central systems then look no further! The role: Collaborating with clients to understand their business requirements and translate them into system configurations and customisations within Dynamics 365 Business Central. Designing and … enabling them to effectively utilise Dynamics 365 Business Central and maximise its potential. Performing data migration activities, ensuring the accurate and timely transfer of data from legacy systems to Dynamics 365 Business Central. Developing and maintaining technical documentation, including functional specifications, user guides, and training materials. Identifying opportunities for process improvements and advising clients on best practices More ❯

degree in Computer Science or related field; Master's preferred. 9+ years of software development experience, particularly in integration and data transformation. Proven ability in migrating legacy systems to modern technology stacks. Practical experience or strong enthusiasm for AI and generative technologies. Strong experience with both C#/.NET and modern web technologies (TypeScript, NodeJS, React). More ❯

Senior Software Engineer Access & SQL > C# .Net migration Hybrid (12 days in HQ) £60,00070,000 + benefits This role will take ownership of a legacy product developed in Microsoft Access, with a view to modernising the system via a microservices architecture. The successful candidate will maintain, document, and optimise the current product, whilst designing, developing, and implementing … based platform. Maintain and optimise the existing Access database, ensuring its reliability and efficiency. Produce comprehensive, high-level technical documentation, ensuring code is well-commented and maintainable. Rewrite legacy services to ensure they are modular and reusable in future system developments. Review and refine the SQL database, focusing on building a robust relational database model. Design and propose … and database performance monitoring. Familiarity with the wider Microsoft technology stack. Business process analysis and optimisation experience. Senior Software Engineer Skills and qualifications: Skilled in managing legacy systems while facilitating modernisation efforts. Strong documentation and communication skills. Ability to work independently and collaboratively across hybrid work environments. In return for joining, you will be provided with industry More ❯

leadership to drive our engineering excellence forward. Key Responsibilities: Technical Leadership: Serve as a hands-on technical leader who can architect, design, and guide the implementation of highly resilient systems Build a compelling vision and strategic roadmap for our SRE, DevOps, and Platform Engineering functions Establish and evangelize engineering best practices across teams and the wider organization Drive technical … innovation while ensuring operational excellence Provide architectural guidance to ensure systems meet resilience, scalability, and performance requirements Team Leadership: Lead and mentor a high-performing team of DynamoDB specialists, SREs, DevOps engineers, and platform engineers across global locations Develop team members through goal setting, performance management, and career development planning Foster a culture of innovation, continuous improvement, and engineering … leading distributed global teams Desired Skills: Experience in financial services technology environments Knowledge of AWS, Kubernetes, observability platforms, and CI/CD technologies Background in transforming legacy systems to modern architectures Experience with DynamoDB and cloud-native database technologies Understanding of UK and global financial regulatory requirements What We Offer: Chance to shape the technical direction of More ❯

for patients and healthcare professionals. Why This Role Now? EU Expansion: Harmonise architecture across jurisdictions with varying compliance, data residency, and operational models. Platform Unification: Consolidate legacy systems into a modular, reusable platform architecture. Digital Acceleration: Enable rapid product development without compromising interoperability, governance, or safety. Cross-Functional Collaboration: Act as a unifying technical voice across Product … to articulate a future-state architecture aligned with business strategy. Principles-led Design: Grounded in sound architectural principles, not just trends. System Thinker: Views architecture as a system-of-systems — from infrastructure to UX. Pragmatic Execution: Balances scalability with lean governance; avoids overengineering. Strong Collaborator: Influences across disciplines and senior stakeholders. Regulatory Awareness: Experience designing within regulated environments (e.g. More ❯

for patients and healthcare professionals. Why This Role Now? EU Expansion: Harmonise architecture across jurisdictions with varying compliance, data residency, and operational models. Platform Unification: Consolidate legacy systems into a modular, reusable platform architecture. Digital Acceleration: Enable rapid product development without compromising interoperability, governance, or safety. Cross-Functional Collaboration: Act as a unifying technical voice across Product … to articulate a future-state architecture aligned with business strategy. Principles-led Design: Grounded in sound architectural principles, not just trends. System Thinker: Views architecture as a system-of-systems — from infrastructure to UX. Pragmatic Execution: Balances scalability with lean governance; avoids overengineering. Strong Collaborator: Influences across disciplines and senior stakeholders. Regulatory Awareness: Experience designing within regulated environments (e.g. More ❯

our business units. Our technology teams offer you an environment that will present you with exciting challenges - be it through the support and further development of legacy systems or the introduction of modern technologies such as AI, machine learning and highly automated trading applications. Our Technology department of around 300 employees works largely in an agile way … presenting this data on our Investment Bank website, creating new products for our clients (AI, calculation engine, multi media channels). The team also provides registration, scheduling and reporting systems for the Conferencing team which serve CEOs/CFOs, covering both small and flagship events. The team of 5 developers and 1 product owner use agile methodologies to deliver More ❯

an IT professional, work closely with our business units. Our Technology teams offer you an environment full of exciting challenges - whether it's supporting and developing legacy systems or introducing modern technologies such as AI, machine learning, and highly automated trading applications. Our IT department, with around 300 employees, works mostly in an agile manner using a … flexible mindset, with the necessary willingness to learn about our comprehensive product range In-depth experience with Oracle RAC Ideally, initial experience in database administration, especially with relational database systems Knowledge of SQL, PL/SQL, Ansible, and scripting (Shell) is an advantage Know-how in Linux is a plus Very good written and spoken German and English skills More ❯

Access Management (IdAM), and overall access governance. This role will collaborate closely with cyber security, engineering, and business stakeholders, ensuring the delivery of secure, modern platforms to replace legacy systems. Candidates based in the UK, able to work in a hybrid model (two days per week in either our London or Nuneaton office), are strongly preferred. The Role … new store and enterprise features. Technical Execution Ensure agile delivery of high-quality, secure solutions using Scrum, SAFe, or other scaled agile frameworks. Guide transitions from legacy systems to secure modern platforms with minimal disruption. Monitor and support post-implementation phases, addressing access issues, incidents, or escalations. Initial Objectives (First 3 Months) Establish and lead a comprehensive More ❯

and Access Management (IdAM), and overall access governance.This role will collaborate closely with cyber security, engineering, and business stakeholders, ensuring the delivery of secure, modern platforms to replace legacy systems. Candidates based in the UK, able to work in a hybrid model (two days per week in either our London or Nuneaton office), are strongly preferred. The Role … new store and enterprise features. Technical Execution Ensure agile delivery of high-quality, secure solutions using Scrum, SAFe, or other scaled agile frameworks. Guide transitions from legacy systems to secure modern platforms with minimal disruption. Monitor and support post-implementation phases, addressing access issues, incidents, or escalations. Initial Objectives (First 3 Months) Establish and lead a comprehensive More ❯

Migration consultants Liaising closely with client counterparts, Accenture colleagues and Workday to achieve a robust solution Serve as the primary knowledge source for converting data from legacy systems and spreadsheets into the WorkdayCloudHCM & Financials system Intermediate understanding of ETL scripts and methodology to load data into Workday. Active involvement in (pre-)sales activities to shape the right More ❯

of GenAI and ML, including LLMs, RAG, MLOps, and prompt engineering Familiarity with platforms such as AWS Bedrock, Google Vertex, LangChain, or LlamaIndex Experience with both legacy systems and modern tech stacks Proven track record in agile delivery and digital transformation Excellent communication, analytical, and stakeholder management skills Willingness to travel internationally Desirable Attributes Degree in Computer 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 ❯

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 ❯

all running on AWS. We are looking for someone who is passionate about technology, loves solving customer problems, and delivers the high quality work that we expect for critical systems at Amazon. In GTTS we embody the culture of a scale-up but still assume the responsibility of building and running products at the scale and criticality of Amazon. … We follow agile development practices, working closely with customers, failing fast, and continually looking for new ideas from within and without Amazon. We proactively deprecate legacy systems to reduce the burden of technical debt, and regularly develop new-greenfield-products. As a SDE in GTTS, you will work on challenging engineering problems, processing large datasets, and building … a SDE, you provide technical leadership at Amazon. You help establish technical standards and drive Amazon's overall technical architecture, engineering practices, and methodologies. You think globally when building systems, ensuring Amazon builds high performing, scalable systems that work well together. You are hands on, producing both detailed technical work and high-level designs. In GTTS we operate More ❯

to clients in demo sessions. Overseeing configuration, testing, training, and data migration. Acting as the bridge between technical and non-technical teams. Helping to integrate BC with third-party systems and other Microsoft products. 🧠 What we’re looking for: Strong experience delivering ERP projects, especially D365 Business Central . Confident leading client workshops and scoping exercises. Experience with legacy systems like SAGE, Orderwise, Prima, etc., is a plus. Excellent communicator who can explain complex ideas clearly. Familiar with project tools like Azure DevOps, Jira, MS Project, or similar. A self-starter who enjoys autonomy but also thrives in a team. 🎯 What’s in it for you: Hybrid working A genuinely supportive team environment where your input More ❯

metrics and are scalable Helping to shape, evolve and document the architecture that underpins the existing platforms and services and lead their on-going transition from legacy systems to cloud based architectures. Interacting with project roles as required, to gain an understanding of the complex business environment, technical context, end client requirements and organisational strategic direction. Advising … its broader eco system Deployment automation technologies The ability to code, especially Infrastructure as code Network design, implementation, and administration A track record in the design and application of systems, leveraging automation technologies A deep understanding of Virtualisation and Container technologies Design of large, complex systems including practical experimentation and development skills Has both technical breadth and depth More ❯

re-architecting complex systems. This is a hands-on role requiring deep technical understanding and strong stakeholder engagement skills. You'll be instrumental in stripping back legacy systems to their core, supporting architectural redesign, and ensuring streamlined data and workflow processes. Key Responsibilities Analyse and simplify existing systems. Support the re-architecture of systems to align … with modern architecture principles. Collaborate with technical teams to understand and document data flows and technical workflows. Work closely with stakeholders to ensure business needs are met and systems are user-centric. Assist in developing the business case for system transformation. Engage empathetically with culturally diverse teams, including surveyors and global stakeholders. Ensure end-to-end system understanding and … as a Business Analyst in technical environments. Business Analysis Professional Qualification (e.g. BCS) Strong understanding of architecture principles, data flow, and system re-engineering. Hands-on experience with complex systems (e.g., utilities, case management, bespoke platforms). Systems-oriented mindset with a passion for simplification and optimisation. Excellent communication and stakeholder management skills. Ability to work independently and More ❯

reliability of our products. Key Responsibilities: Developing and maintaining features across web and mobile platforms (Node.js, React, React Native, PHP) Contributing to the design and maintenance of scalable, secure systems Following best practices and supporting their adoption across the team Collaborating with the team to plan and execute roadmap items Participating in code reviews and promoting engineering excellence Developing …/React Native and/or PHP Experience with project management tools such as Jira or Linear Strong technical background and proven track record of building and maintaining reliable systems at scale The following criteria is desirable but not essential: Have experience with geolocation and time-series based systems Have experience with cloud computing (AWS, GCP or Azure … Have experience with designing and implementing service-orientated, event-driven architectures and systems Have experience designing and implementing greenfields projects for scale and adopting, maintaining and modernising legacy systems to extend theirlifespan This role is perfect for someone who thrives in dynamic environments, values clean and secure code, and enjoys collaborating closely with cross-functional teams. More ❯

It's more than a job In this IT role, you will manage, develop, and support the technology infrastructure that powers Kuehne+Nagel's global systems and operations. This contribution is vital to making both special and ordinary moments in the lives of people a reality. In fact, your work enables our teams to deliver fresh fruit, time-sensitive healthcare … the role requires an acute technical awareness, demonstrating a keen ability to embrace emerging and proven technologies whilst at the same time retaining an understanding of legacy systems and their subsequent dependencies within Kuehne & Nagel. How you create impact To provide technical support and guidance on all supported systems. To play an active role in supporting the … devices in accordance with our policies. Take a lead on project work within the team, helping to manage and co-ordinate deployments across our user base. To ensure that systems availability is maintained in accordance with established service levels. Management and ongoing updating of TOPdesk call queues in accordance with agreed SLAs. To work collaboratively across the UK and More ❯

of the cryptocurrency ecosystem. About the role: This role sits within GSR's global Data Engineering team, where you'll contribute to the design and development of scalable data systems that support our trading and business operations. You'll work closely with stakeholders across the firm to build and maintain pipelines, manage data infrastructure, and ensure data is reliable … responsibilities may include: Build and maintain scalable, efficient ETL/ELT pipelines for both real-time and batch processing. Integrate data from APIs, streaming platforms, and legacy systems, with a focus on data quality and reliability. Design and manage data storage solutions, including databases, warehouses, and lakes. Leverage cloud-native services and distributed processing tools (e.g., Apache 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 ❯

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 ❯

d love to meet you. Responsibilities Customer Delivery and Configuration Configure, and deliver solutions using the Sprout.ai platform Liaise with Engineering to deliver integrations between Sprout and our customers' systems Liaise with Data Science to implement & optimise AI document-processing models, AI workflows, and automation processes related to claim management Troubleshoot and resolve technical issues related to Sprout implementations … on their claim, often in times of vulnerability. The barriers to rapid claims settlement were clear; understanding of unstructured data, complexity and volume of decision making, legacy systems and processes. Sprout.ai's patented claims automation platform solves these challenges, and has already delivered instant claims settlement on millions of insurance claims around the world. Our proprietary AI More ❯