26 to 50 of 67 Legacy Systems Jobs in Central London

graduated and eager to dive 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 engineers and quants, you’ll … have the opportunity to contribute to high-impact projects, 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 within a firm that thrives on … greenfield projects from day one — 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 Apply now or reach out directly: obloom@hunterbond.com More ❯

graduated and eager to dive 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 engineers and quants, you’ll … have the opportunity to contribute to high-impact projects, 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 within a firm that thrives on … greenfield projects from day one — 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 Apply now or reach out directly: obloom@hunterbond.com More ❯

inside IR35 (gross umbrella rate) We’re working with a major financial institution looking to scale out its engineering function with a Principal Java Developer to lead critical systems work. This is a hands-on Principal role requiring an experienced engineer with a finance background to come in and stabilise an existing platform. This Java-based stabilisation/rescue … also involves guiding CI/CD improvements, REST API design, and steering collaborative technical decisions across squads. What they’re looking for: Proven experience supporting large-scale, business-critical systems in the finance industry (all areas of finance considered) Strong background in Java and ideally C# Some front-end exposure in Angular - this is mandatory, but doesn't need … to be recent or extensive Comfortable working with legacy systems and large enterprise environments Confident in leading technical conversations across multiple engineering disciplines Experience with CI/CD pipelines and modern deployment practices REST API design This is a great opportunity for an experienced Java Developer to join a prestigious financial player. If you’re someone who More ❯

covering the ingestion, storage, transformation and distribution of tick, timeseries, reference and alternative datasets. The technology stack is similarly varied including a range of legacy and modern systems, across on-premises and cloud infrastructure with technologies and tooling such as Python, dbt, KDB+, Snowflake, SQL and interfacing with Market Data vendors such as Bloomberg, Refinitiv, Factset and More ❯

understanding of modern SDLC practices. Experience in financial applications, Open Banking, AWS, DevOps, Docker/K8S is a plus! Why join my client? Greenfield Project: No legacy systems, no tech debt. Direct Impact: Shape the future of a mission-critical flagship product. Growth Opportunity: Join early and grow with the expanding team. Innovative Culture: Be part of More ❯

to drive continuous improvement. Develop and maintain Power BI dashboards to deliver insights on office occupancy, forecasts, and time recording. Create productivity tools using Power Apps to replace legacy systems. Coordinate the quarterly corporate risk review: chair working-level meetings, challenge risk scoring, ensure directorates update risk registers, maintain the corporate risk register in Power BI, and escalate More ❯

take the lead on building Python-based AI solutions and modern data-driven applications. Key Responsibilities: Design, build, and maintain scalable Python applications. Modernise and enhance legacy systems using AI/ML approaches. Develop APIs and data pipelines for both batch and real-time processing. Build, train, and deploy AI models with a focus on performance, accuracy More ❯

in collaboration with the teams. 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 modelling, ingestion, storage, streaming, and More ❯

environments and has hands-on experience with collaboration technologies and cloud migration. Project Scope This is a multi-year programme to migrate all video conferencing infrastructure from on-premise systems to cloud-based services across global offices. The successful Programme Manager will oversee one of three major migration workstreams, working closely with client stakeholders, delivery partners, and internal teams. … Services sector delivery experience (preferably with Tier 1 banks) Proven track record delivering video conferencing/collaboration technology programmes Hands-on experience with cloud migration from legacy systems Comfortable operating in large, matrixed, global environments Strong knowledge of collaboration tools and networking (e.g. Quadcam, AV systems, ticketing platforms) Desirable Skills Experience with site implementation activities and More ❯

world of blockchain and tokenised assets. Our flagship product, the Ownera Router, powered by the open FinP2P protocol, enables seamless connectivity between institutions, blockchains, and legacy financial systems to unlock new opportunities in digital asset trading and tokenization. Job Overview As a Solutions Engineer , you will partner with the Sales, Product, and Engineering teams to support the … s degree in Computer Science, Engineering, Finance, or a related field. Strong understanding of blockchain technology, digital assets, and tokenization. Experience with financial infrastructure, APIs, and legacy systems integration. Beneficial to have experience with scripting (Python, Bash), knowledge of Kubernetes/Docker, or experience working with financial data platforms. Sales & Business Development Experience: 3–6 years of More ❯

in Central London. This is a hybrid role, requiring 2-3 days per week in the office. This is a modern, digitally native business with no legacy systems - a rare opportunity to work in a clean, forward-thinking tech environment. You'll be joining a dynamic and fast-paced team that values innovation, adaptability, and continuous improvement. … GCP subject matter expert, with direct support from Google Contribute to the adoption of AI and emerging technologies post-migration Thrive in a fast-evolving environment with minimal legacy constraints Requirements : Proven experience as a Data Engineer. Hands-on experience with cloud migrations (on-prem to cloud or cloud-to-cloud). Strong knowledge of GCP, including BigQuery. More ❯

in Central London. This is a hybrid role, requiring 2-3 days per week in the office. This is a modern, digitally native business with no legacy systems - a rare opportunity to work in a clean, forward-thinking tech environment. You'll be joining a dynamic and fast-paced team that values innovation, adaptability, and continuous improvement. … GCP subject matter expert, with direct support from Google Contribute to the adoption of AI and emerging technologies post-migration Thrive in a fast-evolving environment with minimal legacy constraints Requirements : Proven experience as a Data Engineer. Hands-on experience with cloud migrations (on-prem to cloud or cloud-to-cloud). Strong knowledge of GCP, including BigQuery. More ❯

covering the ingestion, storage, transformation and distribution of tick, timeseries, reference and alternative datasets. The technology stack is similarly varied including a range of legacy and modern systems, across on-premises and cloud infrastructure with technologies and tooling such as Python, dbt, KDB+, Snowflake, SQL and interfacing with Market Data vendors such as Bloomberg, Refinitiv, Factset and More ❯

and production-ready by design. You’ll be joining a high-impact security team at a pivotal point in the company’s growth. The environment spans legacy systems, enterprise-grade platforms, and greenfield builds – making it an ideal opportunity for individuals who thrive in varied, fast-paced environments and enjoys taking ownership of deep technical security challenges. More ❯

successful delivery of diverse software projects. This can range from product enhancements to new platform development. Projects may include: ✔️Building identity verification software ✔️ Upgrading and modernising legacy systems ✔️ Developing new client-facing digital products You’ll also work closely with client teams and stakeholders to align delivery with business outcomes. Why should you apply though? 🤔 You'll More ❯

will take full ownership of a large-scale Windows Server migration programme. The scope includes upgrading servers currently running Windows Servers, and addressing a small number of additional legacy systems. This role requires a proven subject matter expert in Windows Server migrations who is comfortable operating across multiple environments that include a complex mix of both legacy More ❯

advice to system users across multiple departments Advising on best practice use of the system to improve user efficiency and data quality Supporting the transition from legacy systems and helping embed the new solution Leading your own workstreams and contributing to a positive change culture Collaborating across business areas to identify user needs and training gaps What … Project has the following core elements: Implementation of the new system and the build of its core processes, data, and automation Data Cleanse and Migration of Data from existing systems to the new system Integration with an extensive portfolio of existing student applications Provision of new reports, student communications, and staff/student online portals Business Change and Transformation … associated with new processes and student journeys Why Join? Impact : Be at the heart of a critical digital transformation Autonomy : Own your workstreams and influence how systems are adopted Flexibility : 100% remote working opportunities. Benefits : October 2026- FTC with potential for an extension, university pension (15.5%) & generous leave package (30 days + Bank Holidays and Closure days over Christmas More ❯

Database Engineer Responsible for the development and delivery of new systems to automate and streamline processes required by different departments. To support the internal IT department with changes and upgrades to software platforms. To be primary contact for all technical questions relating to in-house bespoke systems and interfacing. Database Support Supporting budgeting and financial planning processes for … the SQL environment in SSIS packages. Introduce new field and data types for new information to be collated in the CORE environment. 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 running optimally and to utilise … Forms with Equation system to 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. Analyse and rectify any problems raised More ❯

reality. We’re an early-stage fintech startup, backed by industry insiders, with deep experience in the financial ecosystem. We’re building from zero—no tech debt, no legacy systems. Just a clean slate, strong vision, and higher standards. Now we’re looking for a founding backend engineer to join us at the ground level and help bring … high-trust environment with real autonomy About You You work incredibly hard, really care about your work and take pride in what you do You ship clean code, scalable systems, and solving complex problems elegantly. You’re excited by ownership and unafraid of ambiguity. You move fast, but with precision. You use AI tools to design, code, debug, and … ship faster, not just as a nice-to-have but a MUST-have force multiplier What we're after: 3+ years experience building backend systems and APIs in C#/.NET Strong grasp of architecture patterns: DDD, CQRS, microservices Experience writing clean, testable code with a TDD mindset Experience working in small teams or startups, where autonomy and speed More ❯

system. Key Responsibilities of the Interim Procurement Officer include: Develop a contract management approach for the ERP programme, ensuring alignment of IT contracts with ERP delivery timelines Support legacy system decommissioning by reviewing contract registers and liaising with contract owners to ensure compliance Draft Gateway 2 reports across various procurement lots for review by the Procurement Lead Prepare More ❯

Lead the design, development, and implementation of SharePoint Online solutions tailored to individual business unit requirements. Manage and execute the migration of multiple business units from legacy systems or existing environments into the new SharePoint Online platform. Collaborate with stakeholders to gather requirements and translate business needs into SharePoint functionality. Provide technical leadership and hands-on configuration More ❯

grasp of SaaS delivery models and secure cloud architectures. • Certified Salesforce Application Architect and/or System Architect (CTA preferred). • Knowledge of Azure, AWS, and integrations with legacy systems. • Familiarity with UK public sector compliance (NCSC, ISO 27001, GDS). • Strong commercial and leadership experience in cross-functional delivery teams. • Eligible for SC or DV clearance (active More ❯

ll Do: Manage the data migration workstream across large-scale S/4HANA programmes Lead teams to design, build, test and execute migrations from ECC or legacy systems into S/4 Collaborate with SAP functional and technical consultants to ensure accurate and effective data strategies Plan and manage cutover and migration dress rehearsals , ensuring readiness and More ❯

Month Contract Outside IR35 Oracle Fusion Cloud HCM Business Analyst We are working with a client that is embarking on a transformation drive across their ERP and HR systems, implementing Oracle Fusion HCM to replace over 50 legacy systems and create a single, standardised HR platform. The business needs an experienced business analyst with strong system … design expertise to join the program immediately and act as the key liaison between the HR team and the systems integrator. This requires someone who understands HR business needs, can interpret the capabilities of Oracle Fusion HCM, and help shape effective solutions and challenge the status quo. Joining at the very beginning before process design has started. This is More ❯

evolving the backbone of our platform. This is not a maintenance gig — it’s a high-impact, architecture-focused role where your decisions will shape the future of our systems and influence how businesses across the UK interact with their energy supply. Your day-to-day will include: Architecting and building reliable, scalable systems to support our software … We’re Looking For 💻 Deep expertise across the stack , especially in JavaScript/TypeScript, SQL databases, and AWS infrastructure. 🧱 Strong architectural instincts – you’ve designed and delivered robust, scalable systems before. 🔧 Hands-on refactoring experience – you're comfortable navigating legacy systems and improving them iteratively. 👥 Team-first mindset – you’re humble, collaborative, and put outcomes above More ❯