101 to 125 of 230 Legacy Systems Jobs in London

tests and test utilities. Understanding of concepts like thread management, synchronization, resource, and memory management. Microservices architecture and the quality engineering challenges of legacy and monolithic systems. Shifting left by integrating test automation into the software development lifecycle (SDLC). Why Apply? We support your growth through funding More ❯

design, server-side architecture) best practices. Key Responsibilities As our solutions architect, you will be accountable for the development, maintenance and execution of the systems architecture roadmaps. Conduct architectural reviews and propose technical solutions for ongoing digital transformation initiatives. Working closely with the logistics, business systems and development … to ensure that design options are effectively evaluated and that robust recommendations are made. Proven ability to react to issues with legacy systems and suggest innovative approaches to day-to-day challenges within the existing bounds of those platforms. Ongoing governance of project delivery against agreed designs More ❯

estimations and software design. WHERE YOU'LL PLAY As our solutions architect, you will be accountable for the development, maintenance and execution of the systems architecture roadmaps. Conduct architectural reviews and propose technical solutions for ongoing digital transformation initiatives. Work closely with the logistics, business systems and development … to ensure that design options are effectively evaluated and that robust recommendations are made. Proven ability to react to issues with legacy systems and suggest innovative approaches to day-to-day challenges within the existing bounds of those platforms. Ongoing governance of project delivery against agreed designs More ❯

Architect to help shape the future of its data landscape. This high-priority initiative will see the organisation move from complex legacy systems to a modern, cloud-based environment , leveraging the power of Azure, Python, and Databricks . You will be central to designing the data architecture … and implement robust, scalable data architecture on the Microsoft Azure cloud platform. Lead the adoption of Databricks and cloud-native tools to modernise legacy systems. Define data standards, domains, and governance frameworks to support business-critical functions like trading, risk, operations, and regulatory … reporting. Build both real-time and batch data pipelines to support fast, data-driven decision-making. Model enterprise data structures and ensure alignment across systems and teams. Document metadata, lineage, and ownership to support compliance and transparency. Collaborate closely with Data Engineers , ... More ❯

backend to creating an innovative app, there's nothing they can't do. Our Technology team isn't here to fix legacy systems - it's here to build world-class financial features from the ground up that'll be used by millions of people around the world … You may expect our Python Engineers to work on heavily regulated financial systems, but we love the unexpected. We're better known internally for writing high-quality code and building complex novel solutions end-to-end. These geniuses have created our chatbot - the lovely Rita - and they didn't … language An academic background in STEM Fluency in Python, SQL, and other OOPLs Experience with API development and integration A practical understanding of distributed systems The ability to write concurrent code in IO/CPU bound situations Experience with Docker, K8s, Ansible, Teamcity, monitoring, and alerting Nice to have More ❯

into the world of high-performance tech and quantitative finance? Join a leading global trading firm where innovation is key — no legacy systems, no bureaucracy, just a fast-paced, intellectually stimulating environment designed for growth. With unlimited access to cutting-edge technology and mentorship from top-tier … impact projects from day one, shaping the future of trading tech. 🛠️ What You’ll Be Doing 🧠 Develop and enhance state-of-the-art trading systems and infrastructure 📊 Design and implement your own quantitative models 🤝 Collaborate with top engineers, quants, and researchers to tackle complex challenges 🚀 Learn rapidly and grow … your contributions have real impact 🧠 Collaborate with some of the brightest minds in both tech and finance 🛠 Access to top-of-the-line tools, systems, and infrastructure 📈 Unmatched career growth in a high-performance, meritocratic culture 📩 Ready to jumpstart your career at the forefront of trading tech? Apply now More ❯

into the world of high-performance tech and quantitative finance? Join a leading global trading firm where innovation is key — no legacy systems, no bureaucracy, just a fast-paced, intellectually stimulating environment designed for growth. With unlimited access to cutting-edge technology and mentorship from top-tier … impact projects from day one, shaping the future of trading tech. 🛠️ What You’ll Be Doing 🧠 Develop and enhance state-of-the-art trading systems and infrastructure 📊 Design and implement your own quantitative models 🤝 Collaborate with top engineers, quants, and researchers to tackle complex challenges 🚀 Learn rapidly and grow … your contributions have real impact 🧠 Collaborate with some of the brightest minds in both tech and finance 🛠 Access to top-of-the-line tools, systems, and infrastructure 📈 Unmatched career growth in a high-performance, meritocratic culture 📩 Ready to jumpstart your career at the forefront of trading tech? Apply now More ❯

years expertise of developing and supporting SQL and C#. Software Development: Analysis of issues pertaining to problems or errors raised by in-house systems, i.e. CORE, SharePoint interface, Equation end of day cycle. Understanding business requirements in order to develop and deliver appropriate solutions based on system definition documents. … Introduce new field and data types for new information to be collated in the CORE environment. To integrate with all the Bank's sub-systems using data abstraction and connectivity layers, i.e. ODBC, ADO.net. Build reports based on business requirements using Hyperion Interactive Reports. Ensure that the environment is … introduce automation of processes thereby eliminating the need for duplicate entry. Utilise web services to integrate from cutting edge technology into legacy systems such as Equation. End of Day Cycle: Provide second and third level support for in-house programmes during the end of day cycle. Able More ❯

Solid understanding of OOP principles and design patterns • Proficient with MySQL and database design, large datasets, and queries • Experience with asynchronous processing and queueing systems • Proficient in HTML, CSS, and JavaScript (React and jQuery preferred) • Familiarity with Git for version control • Test-driven development experience with PHPUnit and Jest … Experience integrating third-party services and REST APIs • Exposure to AWS and distributed system architecture Bonus Skills: • Experience refactoring and modernising legacy systems • Familiarity with Docker • Experience with responsive design and mobile-first interfaces Interested? Apply here for a fast-track path to the Hiring Manager Application More ❯

Digital Communications Platforms (intranet and public website) * Deliver and integrate software applications to form a complete service, enabling the decommissioning of legacy systems and applications, migration to Cloud infrastructure, and deploying Commercial Off-The-Shelf products * Plan and lead development on sets of related stories * Work with … services you build, always seeking ways to improve system robustness, resilience and stability Skills required: * Web development (JavaScript; React; Node; HTML); AWS; version control systems (e.g. Atlassian, GitLab) * Experience of SharePoint, Drupal and/or MATOMO would be advantageous, but not vital. As an organisation and as a team More ❯

The candidates should be eligible to obtain a security clearance to the SC level. Responsibilities: Governance of the relationships between applications, legacy systems, component libraries, content repositories and supporting databases. Preparing and running functional design workshops, creating design specifications based on out-of-the-box functionality and … client presentations, workshops, proof of concept designs and responses to technical and business enquiries. Hands-on technical delivery of the ServiceNow technical solutions. Research systems and/or programs to determine causes of failure or poor operational performance; then define, test, and implement detailed solutions. Stay current on product More ❯

AI-powered software designed to help every hospital deliver world-class care for their patients. Our platform is already the core backbone of health systems today, transforming clinical and operational workflows at scale with the world's first AI-native hospital information system. This next-generation platform is a … some deep technical problems you may tackle in your first 6 months: Modern cloud architecture, built from scratch : We have no legacy systems to untangle. We're designing a modern cloud-native platform with Elixir at its core. Develop a radically better access control system for clinical More ❯

credit risk and pricing systems. This is a unique opportunity to shape a new system from the ground up, unencumbered by legacy systems or constraints. The Lead Risk Pricing Data Scientist will be a hands-on builder and help us develop a team over time. They will … the strategy yourself. You rely on a large team of doers. You should be excited by getting your hands dirty and designing the first systems and models yourself. What we're looking for from you: Experiences that are essential: Experience building innovative productionised credit risk models. Experience directly leading More ❯

Strong, hands-on experience with PostgreSQL, especially in performance tuning and optimisation Experience with database migrations (e.g. from Oracle or other legacy systems to PostgreSQL) Deep understanding of schema design, query optimisation, and indexing strategies Familiarity with cloud and modern tooling (e.g., Terraform, AWS/GCP, monitoring More ❯

Strong, hands-on experience with PostgreSQL, especially in performance tuning and optimisation Experience with database migrations (e.g. from Oracle or other legacy systems to PostgreSQL) Deep understanding of schema design, query optimisation, and indexing strategies Familiarity with cloud and modern tooling (e.g., Terraform, AWS/GCP, monitoring More ❯

Developer, you'll be joining a new division working in an agile environment. Here's what you'll be doing: - Migrate legacy systems to Salesforce without disrupting business operations. - Design, implement, test, and maintain Salesforce applications. - Utilise tools such as Apex, Visualforce, Lightning Components, Salesforce DX, and More ❯

Developer, you'll be joining a new division working in an agile environment. Here's what you'll be doing: - Migrate legacy systems to Salesforce without disrupting business operations. - Design, implement, test, and maintain Salesforce applications. - Utilise tools such as Apex, Visualforce, Lightning Components, Salesforce DX, and More ❯

Developer, you'll be joining a new division working in an agile environment. 😍 Here's what you'll be doing: 🔜 - Migrate legacy systems to Salesforce without disrupting business operations. - Design, implement, test, and maintain Salesforce applications. - Utilise tools such as Apex, Visualforce, Lightning Components, Salesforce DX, and More ❯

Developer, you'll be joining a new division working in an agile environment. 😍 Here's what you'll be doing: 🔜 - Migrate legacy systems to Salesforce without disrupting business operations. - Design, implement, test, and maintain Salesforce applications. - Utilise tools such as Apex, Visualforce, Lightning Components, Salesforce DX, and More ❯

Developer, you'll be joining a new division working in an agile environment. 😍 Here's what you'll be doing: 🔜 - Migrate legacy systems to Salesforce without disrupting business operations. - Design, implement, test, and maintain Salesforce applications. - Utilise tools such as Apex, Visualforce, Lightning Components, Salesforce DX, and More ❯

Developer, you'll be joining a new division working in an agile environment. 😍 Here's what you'll be doing: 🔜 - Migrate legacy systems to Salesforce without disrupting business operations. - Design, implement, test, and maintain Salesforce applications. - Utilise tools such as Apex, Visualforce, Lightning Components, Salesforce DX, and More ❯

Developer, you'll be joining a new division working in an agile environment. 😍 Here's what you'll be doing: 🔜 - Migrate legacy systems to Salesforce without disrupting business operations. - Design, implement, test, and maintain Salesforce applications. - Utilise tools such as Apex, Visualforce, Lightning Components, Salesforce DX, and More ❯

Developer, you'll be joining a new division working in an agile environment. 😍 Here's what you'll be doing: 🔜 - Migrate legacy systems to Salesforce without disrupting business operations. - Design, implement, test, and maintain Salesforce applications. - Utilise tools such as Apex, Visualforce, Lightning Components, Salesforce DX, and More ❯

team. You will get a lot of independence and responsibility right away, and you'll learn at an unprecedented speed! No legacy systems, no corporate bureaucracy, no multiple levels of approvals. It is up to you to make an impact. What will you work on After a More ❯

experience, your work will have a direct impact on our products and decision-making. We've made great progress migrating from legacy systems to a modern data stack, and you'll help us continue that journey-building new platforms and evolving the tools we've already delivered. More ❯