26 to 50 of 131 Legacy Systems Jobs in the City of London

and significant experience working with Microsoft/Azure data tools. You'll play a key role in standardising and migrating data from a diverse range of legacy systems into a centralised Dynamics 365 CE environment. You’ll lead the full data migration lifecycle and work closely with technical and functional stakeholders to ensure a smooth, high-quality … transition. Key Responsibilities Lead and execute ETL (Extract, Transform, Load) processes into Dynamics 365 CE modules (e.g., Sales, Customer Service, Field Service). Work with legacy CRM systems, spreadsheets, databases, and proprietary platforms to extract data. Map and transform data into Dynamics 365 CE entities such as Accounts, Contacts, Leads, Cases, and Opportunities. Cleanse, deduplicate, and align More ❯

and significant experience working with Microsoft/Azure data tools. You'll play a key role in standardising and migrating data from a diverse range of legacy systems into a centralised Dynamics 365 CE environment. You’ll lead the full data migration lifecycle and work closely with technical and functional stakeholders to ensure a smooth, high-quality … transition. Key Responsibilities Lead and execute ETL (Extract, Transform, Load) processes into Dynamics 365 CE modules (e.g., Sales, Customer Service, Field Service). Work with legacy CRM systems, spreadsheets, databases, and proprietary platforms to extract data. Map and transform data into Dynamics 365 CE entities such as Accounts, Contacts, Leads, Cases, and Opportunities. Cleanse, deduplicate, and align More ❯

customers, and global teams (including a team in Bulgaria) Own and influence technical design, architecture, and best practices Support and develop engineers through mentoring and technical guidance Balance legacy system understanding with innovation in new platforms Work closely with stakeholders across engineering, product, and leadership Tech Stack Backend: .NET Core 8/9, Azure Cloud Frontend: React, Typescript … Experience working on a SaaS product Team Setup UK Engineering Team: 5 engineers (plus a team of contractors), with plans to grow Bulgaria Team: 7 engineers (focused on legacy product support) DevOps: Small, cross-functional team supporting all projects Salary & Benefits: Competitive base salary: up to £130,000 Bonus 10-15% Private healthcare coverage Company pension scheme More ❯

customers, and global teams (including a team in Bulgaria) Own and influence technical design, architecture, and best practices Support and develop engineers through mentoring and technical guidance Balance legacy system understanding with innovation in new platforms Work closely with stakeholders across engineering, product, and leadership Tech Stack Backend: .NET Core 8/9, Azure Cloud Frontend: React, Typescript … Experience working on a SaaS product Team Setup UK Engineering Team: 5 engineers (plus a team of contractors), with plans to grow Bulgaria Team: 7 engineers (focused on legacy product support) DevOps: Small, cross-functional team supporting all projects Salary & Benefits: Competitive base salary: up to £130,000 Bonus 10-15% Private healthcare coverage Company pension scheme More ❯

design patterns API Development Building and maintaining RESTful APIs Solid understanding of HTTP protocols, status codes, headers, etc. API documentation using tools like Swagger/OpenAPI Legacy Systems Exposure to or experience with WCF services — we still support some older systems, so comfort working with a mix of modern and legacy tech is key More ❯

design patterns API Development Building and maintaining RESTful APIs Solid understanding of HTTP protocols, status codes, headers, etc. API documentation using tools like Swagger/OpenAPI Legacy Systems Exposure to or experience with WCF services — we still support some older systems, so comfort working with a mix of modern and legacy tech is key More ❯

a digital ecosystem that enhances the company’s hydrogen production and sales operations. This role is instrumental in advancing the digital transformation agenda by integrating isolated legacy systems, deploying new digital tools, and ensuring full compliance with evolving regulatory frameworks. The ideal candidate will combine technical acumen with excellent programme management skills and a strong grasp of … leadership, and stakeholder engagement skills Sound financial and budgeting capabilities Effective multitasking and problem-solving abilities under pressure Proficiency in project management tools (e.g. Microsoft Project) Experience integrating diverse systems and technologies Knowledge of Python is a plus Familiarity with UK low-carbon certification schemes (LCHS, RTFC) is advantageous #J-18808-Ljbffr More ❯

functional excellence by defining and maintaining standards, methods, and tools, incorporating best practices from market-standard implementations. Manage complex integration scenarios and interfaces between on-premise, cloud, and legacy systems. Skills & Requirements: 15+ years of relevant software development experience with a comprehensive full stack profile (front-end, back-end, cloud automation, orchestration). Proficient in .NET and .NET More ❯

Strong knowledge of finance processes, including accounting, financial reporting, and budgeting, and how these map to D365. Experience supporting or leading ERP system migrations, particularly from legacy systems to D365. Skilled in gathering, analysing, and documenting business requirements, and translating them into functional specifications and system solutions. Excellent problem-solving abilities with a track record of identifying … business needs and deliver effective solutions. Assess and solve complex finance-related problems by applying industry best practices and technology solutions. Support the migration from legacy finance systems to a new platform, ensuring smooth transition and minimal disruption. Analyse and understand matured finance processes and adapt them to the new platform, leveraging your expertise to enhance business More ❯

Strong knowledge of finance processes, including accounting, financial reporting, and budgeting, and how these map to D365. Experience supporting or leading ERP system migrations, particularly from legacy systems to D365. Skilled in gathering, analysing, and documenting business requirements, and translating them into functional specifications and system solutions. Excellent problem-solving abilities with a track record of identifying … business needs and deliver effective solutions. Assess and solve complex finance-related problems by applying industry best practices and technology solutions. Support the migration from legacy finance systems to a new platform, ensuring smooth transition and minimal disruption. Analyse and understand matured finance processes and adapt them to the new platform, leveraging your expertise to enhance business More ❯

will be part of a collaborative and innovative environment, supporting the FX Options Trading business. The team focuses on developing cutting-edge solutions while transitioning from legacy systems, and this is an exciting opportunity to work on high-impact projects in a fast-paced front office environment . Key Responsibilities: Develop, deploy, and support front-office applications … Making, and Trade Booking. Collaborate closely with brokers, external clients, and business partners to expand and improve electronic offerings. Ensure system integration with upstream trade execution platforms and enhance systems to meet regulatory requirements (MiFID II, UMR, IMM). Liaise with teams across Trading, Sales, Market Risk, and Operations to gather requirements and implement key changes. Support and develop More ❯

will be part of a collaborative and innovative environment, supporting the FX Options Trading business. The team focuses on developing cutting-edge solutions while transitioning from legacy systems, and this is an exciting opportunity to work on high-impact projects in a fast-paced front office environment . Key Responsibilities: Develop, deploy, and support front-office applications … Making, and Trade Booking. Collaborate closely with brokers, external clients, and business partners to expand and improve electronic offerings. Ensure system integration with upstream trade execution platforms and enhance systems to meet regulatory requirements (MiFID II, UMR, IMM). Liaise with teams across Trading, Sales, Market Risk, and Operations to gather requirements and implement key changes. Support and develop More ❯

Date: 31.07.2025 col-wide Job Description: About the Company We are seeking an experienced IT Business Analyst (end to end) to lead the replacement of legacy lending systems with Loan IQ, a corporate lending processing suite of Finastra. The ideal candidate will have a strong background in Commercial Banking operations, particularly with regards to Loans as a … product, and extensive experience in leading IT business analysis with focus on definition of the target process, the target state of systems integration, and their SIT strategy within complex global environments. The role requires effective stakeholder management across London and the US, and a deep understanding of software development lifecycles, strong business process modelling skills, and knowledge about integration … RTB IT development teams, and key business stakeholders. About the Role The role involves leading the IT integration work stream of Loan IQ implementation with various upstream and downstream systems, engaging with stakeholders, providing project status updates, collaborating with cross-functional teams, and facilitating workshops and meetings. Responsibilities Workstream Leadership: Lead the IT integration work stream of Loan IQ More ❯

As the Enterprise Security Architect, you’ll own the 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 is a foundational … business and technology strategies into 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 with product, digital, data, finance … an Enterprise or Security Architect in complex environments Strong understanding of enterprise security frameworks, governance, and risk management Experience delivering secure architectures in cloud, hybrid, and legacy systems Hands-on knowledge of modelling tools and frameworks (UML, ArchiMate, Bizz design ideal) Broad technical knowledge across infrastructure, data, CRM, HR, and finance systems Strong communication and stakeholder More ❯

As the Enterprise Security Architect, you’ll own the 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 is a foundational … business and technology strategies into 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 with product, digital, data, finance … an Enterprise or Security Architect in complex environments Strong understanding of enterprise security frameworks, governance, and risk management Experience delivering secure architectures in cloud, hybrid, and legacy systems Hands-on knowledge of modelling tools and frameworks (UML, ArchiMate, Bizz design ideal) Broad technical knowledge across infrastructure, data, CRM, HR, and finance systems Strong communication and stakeholder More ❯

this role is to facilitate the seamless, efficient, and effective migration of applications from the current technology stack to a modernized platform. This includes upgrades to the latest operating systems, database versions, and associated infrastructure components. The role is pivotal in ensuring that the migration process is technically sound, strategically aligned, and executed with minimal disruption to business operations. … versatile Technical Scrum Master with deep expertise in Agile methodologies to support a major application migration initiative. This role is essential in driving the transformation of legacy systems into a modern, scalable, and secure technology environment. The ideal candidate will be an experienced professional who is comfortable working in close partnership with a diverse range of global … to the Software Development Life Cycle (SDLC). The role contributes directly to the execution of the IT Strategy, supports revenue-generating and regulatory initiatives, and ensures that IT systems provide a competitive edge. Additionally, the role actively promotes Diversity and Inclusion across all aspects of the development lifecycle and team dynamics. Position Description Lead and manage Agile scrums More ❯

this role is to facilitate the seamless, efficient, and effective migration of applications from the current technology stack to a modernized platform. This includes upgrades to the latest operating systems, database versions, and associated infrastructure components. The role is pivotal in ensuring that the migration process is technically sound, strategically aligned, and executed with minimal disruption to business operations. … versatile Technical Scrum Master with deep expertise in Agile methodologies to support a major application migration initiative. This role is essential in driving the transformation of legacy systems into a modern, scalable, and secure technology environment. The ideal candidate will be an experienced professional who is comfortable working in close partnership with a diverse range of global … to the Software Development Life Cycle (SDLC). The role contributes directly to the execution of the IT Strategy, supports revenue-generating and regulatory initiatives, and ensures that IT systems provide a competitive edge. Additionally, the role actively promotes Diversity and Inclusion across all aspects of the development lifecycle and team dynamics. Position Description Lead and manage Agile scrums More ❯

twentyAI are partnering with a globally renowned law firm currently undergoing a major digital and data transformation. With a deep-rooted legacy in legal excellence and a strong global footprint, the firm is currently modernising their data capability and building a new data platform. About the Role You will be part of a diverse group of engineers and … adopting best practices and integrating security controls in pipelines. Identify bottlenecks and optimise performance across data pipelines and cloud infrastructure. Participate in the ongoing migration from legacy systems to modern data platforms. Your Background Experience with Microsoft Azure data tools — especially Data Factory and Synapse. Familiarity with Microsoft Fabric will be beneficial. Otherwise, experience with platforms like …/CD pipelines in a data engineering context. Practical knowledge of distributed processing frameworks, particularly Spark. Comfortable working in a complex environment that is evolving from legacy systems toward a modern data architecture. Strong problem-solving skills and the ability to work collaboratively in a cross-functional agile team. Exposure to data governance, security, and compliance principles More ❯

twentyAI are partnering with a globally renowned law firm currently undergoing a major digital and data transformation. With a deep-rooted legacy in legal excellence and a strong global footprint, the firm is currently modernising their data capability and building a new data platform. About the Role You will be part of a diverse group of engineers and … adopting best practices and integrating security controls in pipelines. Identify bottlenecks and optimise performance across data pipelines and cloud infrastructure. Participate in the ongoing migration from legacy systems to modern data platforms. Your Background Experience with Microsoft Azure data tools — especially Data Factory and Synapse. Familiarity with Microsoft Fabric will be beneficial. Otherwise, experience with platforms like …/CD pipelines in a data engineering context. Practical knowledge of distributed processing frameworks, particularly Spark. Comfortable working in a complex environment that is evolving from legacy systems toward a modern data architecture. Strong problem-solving skills and the ability to work collaboratively in a cross-functional agile team. Exposure to data governance, security, and compliance principles More ❯

As the Enterprise Architect for Applications , you’ll be responsible for designing the future state of the application estate, guiding the organisation as it transitions from legacy systems to modern, service-oriented architectures. You will provide architectural guardrails for solution delivery teams, mentor architects and technical leads, and work closely with cross-functional teams to ensure alignment … applications (Oracle, Microsoft, Salesforce, MuleSoft) Guide and mentor solution and technical architects to ensure high standards of application design Collaborate with teams across digital, data, CRM, finance, and HR systems Participate in architecture governance groups and project boards Promote continuous improvement of application platforms and tooling Monitor technology trends and recommend relevant innovations Support the development of business cases … microservices) Knowledge of architecture modelling tools and frameworks (e.g. UML , ArchiMate , Bizz design ) Familiarity with data structure concepts and relational databases (SQL Server, Oracle, MySQL) Broad understanding of enterprise systems (CRM, Finance, HR, integration platforms) Strong communication and stakeholder management skills Experience with architecture assurance, governance, and version-controlled repositories Strategic mindset with a hands-on approach to delivery More ❯

As the Enterprise Architect for Applications , you’ll be responsible for designing the future state of the application estate, guiding the organisation as it transitions from legacy systems to modern, service-oriented architectures. You will provide architectural guardrails for solution delivery teams, mentor architects and technical leads, and work closely with cross-functional teams to ensure alignment … applications (Oracle, Microsoft, Salesforce, MuleSoft) Guide and mentor solution and technical architects to ensure high standards of application design Collaborate with teams across digital, data, CRM, finance, and HR systems Participate in architecture governance groups and project boards Promote continuous improvement of application platforms and tooling Monitor technology trends and recommend relevant innovations Support the development of business cases … microservices) Knowledge of architecture modelling tools and frameworks (e.g. UML , ArchiMate , Bizz design ) Familiarity with data structure concepts and relational databases (SQL Server, Oracle, MySQL) Broad understanding of enterprise systems (CRM, Finance, HR, integration platforms) Strong communication and stakeholder management skills Experience with architecture assurance, governance, and version-controlled repositories Strategic mindset with a hands-on approach to delivery More ❯

and monitoring Clear communicator, comfortable with cross-functional teams Desirable Experience APIs from major financial data providers dbt, Snowflake Kafka, Airflow Java feedhandler support Migration of legacy systems (e.g. MATLAB) This position offers a competitive compensation package and hybrid working model. More ❯

and monitoring Clear communicator, comfortable with cross-functional teams Desirable Experience APIs from major financial data providers dbt, Snowflake Kafka, Airflow Java feedhandler support Migration of legacy systems (e.g. MATLAB) This position offers a competitive compensation package and hybrid working model. More ❯

governance, compliance, and London Market regulatory standards. Document data definitions, relationships, and lineage using industry-standard modeling tools. Support data quality initiatives by identifying gaps and inconsistencies in source systems and downstream usage. Qualifications: London Market insurance experience is essential, including familiarity with market data structures and regulatory reporting. Strong experience in data modeling (conceptual, logical, physical) using tools … communication and documentation skills, with the ability to explain complex data concepts to non-technical stakeholders. Preferred Skills: Experience with insurance platforms such as Guidewire, Duck Creek, or legacy PAS systems. Knowledge of Delta Lake, Apache Spark, and data pipeline orchestration tools. Exposure to Agile delivery methodologies and tools like JIRA, Confluence, or Azure DevOps. Understanding of regulatory More ❯

ERP transformations . Background in Finance or Accounting (ACA, ACCA, or CIMA) is highly advantageous. Exposure to Adaptive Planning, Prism Analytics, or integrations with SAP, Concur, ADP, or legacy ERP systems. #J-18808-Ljbffr More ❯