16 of 16 Permanent Legacy Systems Jobs in the City of London

build, and optimise enterprise-scale data solutions, focusing on Databricks and cloud-based engineering. You’ll lead the migration of legacy Oracle systems to a scalable, cloud-native environment, ensuring high-quality pipelines and models that support analytics, regulatory reporting, and business decision-making. Key Responsibilities Lead … Python (or other programming languages). Proven experience leading data engineering teams and delivering enterprise-scale solutions. Experience migrating data from legacy systems (Oracle or similar) to cloud environments. Strong analytical, problem-solving, and communication skills with the ability to explain technical concepts to non-technical stakeholders. ...

advanced data pipelines with Python, SQL, Spark/PySpark and Delta Lake. Champion strong data quality, governance and observability practices. Modernise legacy systems and support large-scale migrations into Azure. Provide technical leadership, set engineering standards and contribute to architectural decisions. Mentor engineers and foster a culture ...

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 ...

sized bank to work on their core data programme of work. The role involves mapping data form multiple sources, including legacy systems, to a Common Data Model, and then into various systems for reporting purposes etc. It is likely that you will have originally come from ...

Technical Leadership Own the architecture of the company's data platform, ensuring scalability, reliability, and security. Drive modernisation by transitioning from legacy systems to a lean, scalable platform. Act as a lead expert for technologies such as AWS, DBT, Airflow, and Databricks. Establish best practices for data ...

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 ...

friction and scale outcomes You Will Need A proven background in RevOps or SalesOps, ideally within scale-up environments Hands-on expertise with CRM systems (HubSpot experience highly preferred) Strong analytical, systems, and automation skills A bias for action - pragmatic, adaptable, and outcomes-led The confidence … Direct impact on growth, working closely with C-suite High-trust, high-ownership role with no legacy systems to fix A values-led mission with real social impact Central London office with a team-first, feedback-friendly culture ...

loading into Workday Ensure data quality, validation and reconciliation across all stages of the programme Manage data mapping and transformation from legacy systems Own Workday to payroll data requirements, ensuring accurate downstream integration Work closely with HR, Payroll, Finance and technical teams to gather and validate requirements ...

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 ...

that—making instant cross-border payments a reality. We’re building a new kind of payments network from scratch. No legacy systems, no tech debt. Just a clean slate, strong vision, and very high standards. We’re backed by deep industry experience and are building a small … turn AI into revenue This is a hands-on, high-impact engineering role . You’ll ship fast, experiment constantly, and own real systems that affect company growth. What We're After You are an engineer first . But you’re also fascinated by AI, automation, and building systems ...

exchange integrations, building resilient real-time pipelines that process market data at scale, designing infrastructure for performance and reliability, and modernizing legacy systems that underpin a platform millions depend on daily. The work spans the full technical stack from data ingestion and processing architecture to infrastructure optimization … 8+ years backend development experience with demonstrated technical leadership as Lead/Staff/Principal Engineer Deep expertise building and operating large-scale distributed systems in production Polyglot engineering background; strong proficiency in Node.js or Golang preferred Hands-on experience designing and scaling modern database architectures (SQL and NoSQL ...

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 ...

environments . The successful candidate will contribute to the design, development, and deployment of scalable applications while helping organisations modernise legacy monolithic systems into API-driven microservices architectures . You will work closely with engineers, DevOps specialists, and stakeholders to deliver robust solutions that improve development efficiency … . Collaborate with DevOps teams to support continuous integration and continuous delivery/deployment pipelines , particularly using Harness . Support the modernisation of monolithic systems through the introduction of APIs, microservices, and gateway architectures . Contribute to secure application deployment , including environments supporting mobile applications. Work alongside infrastructure teams ...

delivery across both BAU and change initiatives. Key responsibilities 1. Test Automation Strategy & Framework Development Design and implement scalable automation frameworks for payment processing systems and APIs. Develop automated test scripts for payment initiation, routing, screening, settlement and reconciliation flows. Automate validation of ISO 20022 (MX) message transformations, schema … testing of payment engines. Develop scripts for high-volume and real-time transaction simulations. Validate coexistence scenarios where legacy and modern payment systems operate in parallel. 5. Controls, Compliance & Risk Validation Automate validation of AML, sanctions screening and regulatory controls embedded in payment workflows. Ensure auditability ...

customer-facing role. This position suits a Senior Infrastructure Architect from an IT MSP or Consultancy background, used to working across everything from legacy on-prem environments through hybrid estates to modern cloud-first platforms. What youll be doing As a Senior Infrastructure Architect, you will work directly … performance, and scalability Given the MSP client base, the successful Senior Infrastructure Architect must be confident modernising mixed estates while supporting business-critical legacy systems. What were looking for: Strong experience producing high-quality HLDs and LLDs Clear commercial awareness and comfort with design trade-offs Confident presenting ...

engagement, guaranteeing reliability and scalability. Plan and execute continuous improvement across a mixed-technology estate, ensuring it balances cutting-edge solutions with intricate legacy systems. Govern and deliver a go-to-market plan that generates excitement about our clients products, engaging the business, the market, and customers. Build … search functionality. Expertise in driving technological change within a dynamic environment, with experience in cloud platforms (AWS), content management (e.g., Drupal), and CRM systems (Salesforce). Ability to thrive in a fast-paced, entrepreneurial culture, balancing strategic thinking with hands-on execution. Strong communication skills and the ability ...