22 of 22 Permanent Legacy Systems Jobs in the City of London

seasoned AWS Data Engineer to join our team and contribute to the development of scalable, secure, and high-performance data solutions. This role involves modernizing mainframe legacy systems, building robust data pipelines, and enabling advanced analytics using AWS-native technologies. You’ll collaborate with cross-functional teams and play a key role in shaping our data strategy. … using AWS S3, with strong understanding of data lifecycle, access control, and performance optimization. Hands-on experience migrating data from Mainframes to AWS, including transformation and validation of legacy formats. Proficiency in reading and processing VSAM data using Copybooks and the Cobrix library. Experience implementing data retention and archival strategies in cloud environments. Strong understanding and practical implementation … documentation skills to clearly articulate data flows, architecture decisions, and technical findings. Experience with pair programming, conducting code reviews, and mentoring team members. Proven ability to reconcile data across systems and ensure data quality and integrity. Experience with data cataloging and metadata management using tools like AWS Glue Data Catalog. Demonstrated self-sufficiency in exploring new tools, troubleshooting issues More ❯

seasoned AWS Data Engineer to join our team and contribute to the development of scalable, secure, and high-performance data solutions. This role involves modernizing mainframe legacy systems, building robust data pipelines, and enabling advanced analytics using AWS-native technologies. You’ll collaborate with cross-functional teams and play a key role in shaping our data strategy. … using AWS S3, with strong understanding of data lifecycle, access control, and performance optimization. Hands-on experience migrating data from Mainframes to AWS, including transformation and validation of legacy formats. Proficiency in reading and processing VSAM data using Copybooks and the Cobrix library. Experience implementing data retention and archival strategies in cloud environments. Strong understanding and practical implementation … documentation skills to clearly articulate data flows, architecture decisions, and technical findings. Experience with pair programming, conducting code reviews, and mentoring team members. Proven ability to reconcile data across systems and ensure data quality and integrity. Experience with data cataloging and metadata management using tools like AWS Glue Data Catalog. Demonstrated self-sufficiency in exploring new tools, troubleshooting issues More ❯

the day-to-day operation of the CRM platform, ensuring seamless functionality and troubleshooting issues. Support system integrations and monitor application performance. Manage data migration from Legacy systems, ensuring accuracy and integrity. Collaborate with Investment Bankers, Operations, Business Support, and IT teams to tailor DealCloud to business needs. Drive a modern IT Change & Release process for the More ❯

ownership of your technical products – a mix of bespoke builds and third-party solutions. Oversee the execution of data initiatives , ensuring accurate integration, transformation, and flow of data across systems, while aligning technical delivery with business priorities and regulatory requirements. Contribute to aligning delivery with overall business goals, helping drive growth, process efficiencies, and digital transformation. Play a central … maturity across the organisation, holding technology teams accountable for delivery. Partner closely with the Head of Technology on technical decisions and data strategy. Influence decisions around legacy systems, streamline processes in collaboration with Technology, and contribute to global transformation initiatives. Required Skills & Expertise: Minimum of 5 years’ experience in a Product Owner or Technical Business Analyst role More ❯

multiple development efforts to ensure alignment with requirements, expectations, and compliance regulations. Collaborate with programmers, database administrators, and technical specialists. Work closely with analysts to understand legacy systems, business processes, and data. Build expertise in ERP implementation/Support best practices. Lead and execute functional testing, including test scenario development, documentation, and validation testing for interfaces and More ❯

multiple development efforts to ensure alignment with requirements, expectations, and compliance regulations. Collaborate with programmers, database administrators, and technical specialists. Work closely with analysts to understand legacy systems, business processes, and data. Build expertise in ERP implementation/Support best practices. Lead and execute functional testing, including test scenario development, documentation, and validation testing for interfaces and More ❯

implementation team Manage project plans, milestones, risks, and budgets across HR, Payroll, IT, and Finance Oversee system configuration, UAT, and deployment activities Coordinate data migration from legacy systems and integration into enterprise data structures Develop training and change plans to support adoption across HR and the wider business Drive continuous improvement and post-go-live optimisation What More ❯

implementation team Manage project plans, milestones, risks, and budgets across HR, Payroll, IT, and Finance Oversee system configuration, UAT, and deployment activities Coordinate data migration from legacy systems and integration into enterprise data structures Develop training and change plans to support adoption across HR and the wider business Drive continuous improvement and post-go-live optimisation What More ❯

all business units to help distribution provide focus in our underwriting approach for best value operational return Help provide feedback and direction as we transition from legacy systems to guidewire and implement salesforce into the business Perform other duties as assigned What Will Our Ideal Candidate Have? Previous experience in a similar role The ability to translate More ❯

role will define the integration strategy and patterns, lead the development of integrations using Microsoft Azure PaaS, and support the interim and long-term transition from legacy systems to cloud-native platforms. This position requires hands-on technical leadership, strategic planning, and strong team management skills. - Strong hands-on experience in designing and delivering integrations using Microsoft More ❯

role will define the integration strategy and patterns, lead the development of integrations using Microsoft Azure PaaS, and support the interim and long-term transition from legacy systems to cloud-native platforms. This position requires hands-on technical leadership, strategic planning, and strong team management skills. - Strong hands-on experience in designing and delivering integrations using Microsoft More ❯

Lead on key campaign streams and work closely with Marketing and Operations teams TOOLS & TECH SQL (core to the role) Salesforce Marketing Cloud (SFMC) – plus some legacy systems Power BI – moving into more advanced reporting and dashboarding WHO YOU’LL WORK WITH You’ll be reporting into a Head of CRM Analytics who’s hands-on, collaborative More ❯

Lead on key campaign streams and work closely with Marketing and Operations teams TOOLS & TECH SQL (core to the role) Salesforce Marketing Cloud (SFMC) – plus some legacy systems Power BI – moving into more advanced reporting and dashboarding WHO YOU’LL WORK WITH You’ll be reporting into a Head of CRM Analytics who’s hands-on, collaborative More ❯

research that shape product and marketing decisions. Partner with Product, Design, Data, Engineering, and Marketing to embed the customer voice into strategy and execution. Overhaul and elevate a legacy team through hiring, mentorship, and organisational change. Establish scalable frameworks, processes, and tools to maximise research effectiveness and influence. Act as a trusted advisor to senior stakeholders, influencing decisions … change, and align stakeholders across functions. Experience partnering closely with Product, Marketing, and Design teams to deliver customer-centric outcomes. Resilient and resourceful: able to navigate legacy systems and inspire transformation. Demonstrated success managing managers and/or senior ICs within high-performing teams. Skilled in storytelling, data synthesis, and presenting clear, compelling insights to senior leadership. More ❯

rules. Develop custom plugins, workflows, and JavaScript to extend D365 CE functionality. Build and maintain Power Automate flows , Power Apps, and Power Pages solutions. Integrate D365 CE with external systems using Azure Logic Apps, APIs, and other integration tools. Assist in data migration, ensuring accurate and secure transfer from legacy systems. Participate in solution design, technical documentation More ❯

Type: Permanent/Client-Facing Role About the Role Entasis Partners is supporting a leading consultancy to secure an experienced Enterprise Architect to drive technology and platform strategy, legacy system modernisation, and M&A integration initiatives. This is a high-impact, client-facing role where you’ll partner with senior stakeholders to define technology roadmaps, rationalise complex IT … technology and platform strategies to support business transformation objectives. Lead legacy system modernisation, including cloud migration, platform consolidation, and process optimisation. Drive M&A integration initiatives, aligning systems, data, and processes across organisations. Advise on enterprise architecture frameworks and best practices to ensure scalable, secure, and future-ready IT landscapes. Mentor and guide cross-functional teams, fostering … senior stakeholders. What We’re Looking For from the Lead Enterprise Architect Proven experience as an Enterprise Architect focused on technology and platform strategy. Hands-on experience with legacy system modernisation, cloud platforms (Azure, AWS, GCP), and IT transformation programmes. Experience leading or supporting M&A integration projects, including system consolidation and rationalisation. Strong stakeholder management and influencing More ❯

Type: Permanent/Client-Facing Role About the Role Entasis Partners is supporting a leading consultancy to secure an experienced Enterprise Architect to drive technology and platform strategy, legacy system modernisation, and M&A integration initiatives. This is a high-impact, client-facing role where you’ll partner with senior stakeholders to define technology roadmaps, rationalise complex IT … technology and platform strategies to support business transformation objectives. Lead legacy system modernisation, including cloud migration, platform consolidation, and process optimisation. Drive M&A integration initiatives, aligning systems, data, and processes across organisations. Advise on enterprise architecture frameworks and best practices to ensure scalable, secure, and future-ready IT landscapes. Mentor and guide cross-functional teams, fostering … senior stakeholders. What We’re Looking For from the Lead Enterprise Architect Proven experience as an Enterprise Architect focused on technology and platform strategy. Hands-on experience with legacy system modernisation, cloud platforms (Azure, AWS, GCP), and IT transformation programmes. Experience leading or supporting M&A integration projects, including system consolidation and rationalisation. Strong stakeholder management and influencing More ❯

gather requirements and define scalable solutions. Facilitate workshops, CRP, SIT, and UAT sessions across European business units. Integration & Data Migration Oversee integrations with Oracle Cloud modules and external logistics systems using OIC, REST APIs, and web services. Manage FBDI/ADFDI-based data migration from legacy systems. Reporting & Analytics Develop OTBI and BI Publisher reports for order More ❯

gather requirements and define scalable solutions. Facilitate workshops, CRP, SIT, and UAT sessions across European business units. Integration & Data Migration Oversee integrations with Oracle Cloud modules and external logistics systems using OIC, REST APIs, and web services. Manage FBDI/ADFDI-based data migration from legacy systems. Reporting & Analytics Develop OTBI and BI Publisher reports for order More ❯

data Lead data cleansing and validation efforts to improve data quality Ensure smooth transfer of employment data, including contracts, personal details, and historical changes Maintain data connections between integrated systems and ensure reporting continuity Establish updated data governance protocols and preserve key reporting structures Coordinate migration of absence records, training logs, payroll data, and compliance-related information Collaborate with … internal teams to resolve legacy system issues and improve day-to-day system usage Support leadership in delivering strategic people initiatives through system transformation Design and execute testing plans, including integration and user acceptance testing Create test cases covering core HR processes such as recruitment, absence tracking, and payroll Validate system performance and reporting capabilities for compliance and More ❯

data Lead data cleansing and validation efforts to improve data quality Ensure smooth transfer of employment data, including contracts, personal details, and historical changes Maintain data connections between integrated systems and ensure reporting continuity Establish updated data governance protocols and preserve key reporting structures Coordinate migration of absence records, training logs, payroll data, and compliance-related information Collaborate with … internal teams to resolve legacy system issues and improve day-to-day system usage Support leadership in delivering strategic people initiatives through system transformation Design and execute testing plans, including integration and user acceptance testing Create test cases covering core HR processes such as recruitment, absence tracking, and payroll Validate system performance and reporting capabilities for compliance and More ❯

AI Lead Solutions Architect Location: Flexible across UK Contract Type: Inside IR35 Are you passionate about designing secure, scalable, and sustainable AI systems that can make a real-world impact? We’re recruiting for a Lead AI Solutions Architect to drive the design and delivery of innovative AI-enabled services across our portfolio. This is a senior, hands-on … architectural leadership role at the intersection of AI, digital transformation, and public service. You'll be responsible for technical design and strategic direction of complex AI systems, spanning real-time data pipelines, automation, machine learning models, and legacy system integration. This role is mapped to the Government Digital and Data Profession: Lead Technical Architect and will help … us build out our capability to design, deliver and govern AI systems that are impactful, safe, and aligned to cross-government standards. 🔍 What You’ll Be Doing Lead end-to-end architectural design for AI solutions across multiple programmes and services. Bridge technical and non-technical communities, helping stakeholders understand and engage with complex AI systems. Make architectural decisions More ❯