1 to 25 of 338 Permanent Legacy Systems Jobs in the UK

tools to accelerate and enhance the migration process, and we’re looking for developers who are excited by the opportunity to work at the intersection of legacy systems, modern development, and AI-assisted engineering. Key Responsibilities - Collaborate with the existing team to re-engineer Oracle PLSQL stored procedures into C# services. - Design and implement .NET-based components … that integrate with both legacy PHP systems and new PostgreSQL databases. - Work closely with business analysts and stakeholders to ensure functional parity and identify opportunities for enhancement. - Participate in the design of a hybrid architecture that supports phased migration. - Use AI-assisted tools to analyze, translate, and optimize legacy code. - Support BAU operations during the … Required SkillsExperience - 5+ years of experience in .NET/C# development, with a strong focus on backend services and data access layers. - Proven experience in migrating legacy systems, especially from Oracle to PostgreSQL or similar. - Strong understanding of PL/SQL and experience translating stored procedures into application logic. - Familiarity with PostgreSQL, including performance tuning and SQL More ❯

tools to accelerate and enhance the migration process, and we’re looking for developers who are excited by the opportunity to work at the intersection of legacy systems, modern development, and AI-assisted engineering. Key Responsibilities - Collaborate with the existing team to re-engineer Oracle PLSQL stored procedures into C# services. - Design and implement .NET-based components … that integrate with both legacy PHP systems and new PostgreSQL databases. - Work closely with business analysts and stakeholders to ensure functional parity and identify opportunities for enhancement. - Participate in the design of a hybrid architecture that supports phased migration. - Use AI-assisted tools to analyze, translate, and optimize legacy code. - Support BAU operations during the … Required SkillsExperience - 5+ years of experience in .NET/C# development, with a strong focus on backend services and data access layers. - Proven experience in migrating legacy systems, especially from Oracle to PostgreSQL or similar. - Strong understanding of PL/SQL and experience translating stored procedures into application logic. - Familiarity with PostgreSQL, including performance tuning and SQL More ❯

in cloud architecture and implementation. - Bachelor's degree in computer science, Engineering, related field, or equivalent experience. - Substantial hands-on technical experience with mainframe, non-x86 legacy systems and with technologies such as COBOL, JCL, CICS, DB2 for z/OS, Assembler, PL/I, Java, Rexx, flat/sequential files, GDGs, and VSAM. - Proven track record … in a technical lead role migrating workloads from mainframe and non-x86 legacy systems to distributed x86 infrastructures either on-premises or on to the Cloud. - Deep experience integrating mainframe and non-x86 legacy systems with distributed Linux-based or Windows-based x86 servers. PREFERRED QUALIFICATIONS - Strong communication skills with the ability to explain … both technical and non-technical audiences - AWS associate or professional level certifications (e.g., Solutions Architect Associate or Professional, DevOps Engineer Professional) preferred - Experience leading customers with mainframe and legacy modernization initiatives. - Experience with tools and methodologies used to migrate mainframe workloads via hardware/middleware emulation, automated code conversion, and re-platforming. - Experience with analyzing on-premises mainframe More ❯

in cloud architecture and implementation. • Bachelor's degree in computer science, Engineering, related field, or equivalent experience. • Substantial hands-on technical experience with mainframe, non-x86 legacy systems and with technologies such as COBOL, JCL, CICS, DB2 for z/OS, Assembler, PL/I, Java, Rexx, flat/sequential files, GDGs, and VSAM. • Proven track record … in a technical lead role migrating workloads from mainframe and non-x86 legacy systems to distributed x86 infrastructures either on-premises or on to the Cloud. • Deep experience integrating mainframe and non-x86 legacy systems with distributed Linux-based or Windows-based x86 servers. PREFERRED QUALIFICATIONS • Strong communication skills with the ability to explain … both technical and non-technical audiences • AWS associate or professional level certifications (e.g., Solutions Architect Associate or Professional, DevOps Engineer Professional) preferred • Experience leading customers with mainframe and legacy modernization initiatives. • Experience with tools and methodologies used to migrate mainframe workloads via hardware/middleware emulation, automated code conversion, and re-platforming. • Experience with analyzing on-premises mainframe More ❯

to get involved in a key ERP implementation project. The role will focus on cleansing data and will deliver the full ETL and Data Migration from legacy systems into Netsuite, as well as working with the business to troubleshoot any issues. Key requirements: Data Migration experience in a Netsuite ERP setting Experience across the full ETL lifecycle … from various legacy ERP systems or Financial Systems Experience in Data Extract, Transform, Load processes and hands-on Experience of Data Cleansing, includuing issue identification, troubleshooting and resolution Knowledge of Data migration technologies Responsibilities: Data Extraction, Transform and Load from legacy systems into the new Netsuite ERP solution Data Cleansing Transformation and Load More ❯

in supporting underserved segments of the mortgage market. Two years ago, they embarked on an ambitious journey to modernise their operations, initiating a massive migration from legacy systems to a cutting-edge cloud environment (Azure). You'll be joining a forward-thinking organisation committed to leveraging technology to enhance its services and operational efficiency. THE ROLE … will lead a large and dynamic team of approximately 30 Data Engineers across multiple locations. Your primary responsibilities will include: Leading Cloud Migration: Overseeing the strategic migration of legacy databases (primarily SQL Server) to the Azure cloud platform. Team Leadership: Managing multiple Data Engineering teams, ensuring continued delivery of legacy projects while simultaneously driving the adoption … leaders across the data office, including the CTO and CIO, to ensure alignment. Third-Party Management: Effectively managing relationships with key third-party partners supporting both legacy systems and modernisation efforts. YOUR SKILLS AND EXPERIENCE: The ideal Head of Data Engineering will have: Proven Leadership: Extensive experience leading large Data Engineering teams, including managing multiple teams and 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 … smart, supportive people who value clean code and collaboration You'll have space to grow, technically, professionally, and personally Experience Core C# & .NET Skills API Development Legacy Systems Security Integration & Communication Database Integration Keywords c# .Net API Location United Kingdom Apply today! We are valconeers Close Software Developer Job Primary Location: United Kingdom First Name Last Name More ❯

something special to the table, including you! So, even if you feel that you're close but not an exact match, we encourage you to apply. Overview The Business Systems Migration Analyst is tasked with managing and executing data migration workstreams within the Acturis insurance software platform. This role is crucial in ensuring the accurate and efficient transfer of … data from legacy systems to Acturis, while maintaining data integrity throughout the process. In this role you will support the overall implementation process, playing a key role in the successful transition to the Acturis platform. If you have a keen eye for detail and are skilled in data migration, we encourage you to apply. How you'll … and risk assessments. Compare legacy and target functionality with an open mind, adopting a best practice approach. Data Extraction and Transformation : Extract data from legacy systems using appropriate tools and techniques. Transform and cleanse data to ensure compatibility with Acturis platform requirements. Data Loading and Validation : Load transformed data into Acturis, ensuring accuracy and completeness. More ❯

currently undergoing a large-scale digital transformation. They are looking for a Full Stack Developer with strong Microsoft and Azure experience to help modernise and integrate legacy systems with cloud-native, scalable applications. This is a hands-on role with involvement across the full software development lifecycle. You'll work in a hybrid environment with a tech … skills with a focus on scalability and security Experience working in agile teams and collaborating with product/design stakeholders Nice to Have Experience with modernising legacy systems Microsoft Azure Developer Certification Familiarity with Durable Functions , Logic Apps, or messaging systems like Event Grid Perks & Benefits 25 days holiday + birthday off Hybrid working Professional development More ❯

ongoing evolution of key platforms in collaboration with cross-functional teams. For this, they are looking for a technically confident developer who's comfortable working across a range of systems, technologies, and business needs. Key Responsibilities: Participate in the design, enhancement, and migration of legacy systems built in C#, VB, and Angular, using MySQL, PostgreSQL, and … maintainability, and ongoing evolution. Contribute to the implementation of modern architectures: microservices, containerised services, and serverless cloud-native components in AWS. Diagnose and resolve complex support issues in legacy applications. Contribute to Agile processes using KANBAN, ensuring transparency and delivery alignment. Document architecture decisions, deployment processes, and codebase changes clearly and thoroughly. Skills & Experience: Expertise in backend development … Javascript, HTML, CSS Strong database skills with SQL Server, MySQL, and PostgreSQL Familiarity working within a cloud environment, particularly AWS or Azure Experience maintaining and modernising legacy systems Experience working in a client-facing or business-facing technical role This is a full-time, permanent role, offering a starting salary up to £65,000 (Depending on experience More ❯

Hybrid), £475-525 per day Inside IR35 Contract role for an experienced Business Data Analyst required to support a large-scale transformation programme, focused on replacing legacy systems with Salesforce CRM and delivering strategic improvements to customer data. You'll bring proven experience in data analysis, data mapping, and data migration projects within CRM or enterprise system … strong advantage. This role is for a proactive and detail-oriented Data Analyst to support a major CRM and customer data transformation, including the migration from legacy systems to Salesforce. This role will focus on analysing customer data, documenting legacy structures, identifying data quality issues, and supporting data mapping, cleansing, validation, and reconciliation activities. Working … driving insight, enabling CRM optimisation, and ensuring the integrity and successful delivery of customer data throughout the migration process. Experience Required: Proven experience supporting data migration projects, including legacy data analysis and transformation. Familiarity with data governance frameworks, including stewardship, ownership, and quality monitoring. Proficiency in SQL, Excel, python and data visualisation tools (e.g., Power BI, Tableau). More ❯

Our client an industry leading private sector business located in East Sussex is looking for a full stack .Net developer. Key Roles Participate in migration of legacy systems built in C#, VB.NET, Angular/TypeScript, using MySQL, PostgreSQL, and SQL Server technologies. Maintaining applications, ensuring reliability, maintainability, and evolution. Act as a liaison between the development team … Angular, TypeScript, JavaScript, HTML, CSS. SQL Server, MySQL, and PostgreSQL. AWS or Azure. Experience in a client-facing or business-facing technical role. Maintaining and modernising legacy systems, including VB.NET. Communication skills to engage confidently with non-technical stakeholders. Knowledge of Docker, CI/CD pipelines, GitHub, and Azure DevOps Reasonable Adjustments: Respect and equality are core More ❯

65k Our client an industry leading private sector business located in Wiltshire is looking for a full stack .Net developer. Key Roles Participate in migration of legacy systems built in C#, VB.NET, Angular/TypeScript, using MySQL, PostgreSQL, and SQL Server technologies. Maintaining applications, ensuring reliability, maintainability, and evolution. Act as a liaison between the development team … Angular, TypeScript, JavaScript, HTML, CSS. SQL Server, MySQL, and PostgreSQL. AWS or Azure. Experience in a client-facing or business-facing technical role. Maintaining and modernising legacy systems, including VB.NET. Communication skills to engage confidently with non-technical stakeholders. Knowledge of Docker, CI/CD pipelines, GitHub, and Azure DevOps Reasonable Adjustments: Respect and equality are core More ❯

business that is in the middle of an exciting technology transformation. They are seeking a Senior .NET Developer to take a leading role in modernising their legacy systems and driving AI adoption across the company. This is a fantastic opportunity for someone passionate about technology evolution, AI tooling, and delivering clean, modern code. You’ll help replace … to a React front end (already 50% there!) Mentoring and supporting other developers while ensuring best practices Collaborating with IT and product teams to redesign and modernise core business systems Participating in architecture discussions, code reviews, and deployment strategy Writing maintainable, well-documented code and implementing scalable solutions What We’re Looking For: 5+ years of .NET development experience … with proven modernisation/migration projects Experience moving from legacy systems (VB.NET) to modern stacks Strong knowledge of C#, .NET Core, SQL Server, REST APIs, and cloud environments Hands-on experience using AI developer tools like GitHub Copilot or ChatGPT Passion for clean code, architecture, and technical leadership Strong communication skills and a collaborative mindset Why Join More ❯

architectural standards. Support quality assurance through proactive review cycles, test planning, and post-implementation validation of solutions to ensure benefits are realised. Maintain strategic oversight of legacy systems such as Verint where appropriate, while helping shape our roadmap toward cloud-first, digitally enabled platforms. What You'll Bring to British Airways: A passion for crafting excellent customer … system integration, service-level agreements, and cloud-based deployment strategies. Solid grasp of Agile and SAFe methodologies, with experience working in digital product teams. Familiarity with legacy systems such as Verint and a strategic approach to migration or coexistence planning. Excellent understanding of cloud infrastructure, security, and enterprise integration. What we offer: We believe that all the More ❯

now 7 years in a row! As a Lead Software Engineer , you will help build, support, and improve the software used across the organisation. This includes: In-house developed systems Integrations with third-party and internal systems Legacy systems Development tools and infrastructure You will lead by example, guide engineers, and support the team manager More ❯

benefits An established, financial services group is on the lookout for a Head of Data Engineering to lead their data platform transformation - a critical migration from legacy systems (SQL Server) to modern Azure cloud technologies. You'll oversee a 40-person team of engineers (across the UK and offshore), guide delivery of critical regulatory and treasury projects … banking/financial services sector Strategic mindset with a delivery-focused leadership style Tech Environment: Azure Data Stack (Synapse, Databricks, Azure SQL, Power BI) SQL, Python Legacy systems primarily in SQL Server Interview Process: Initial 30-minute informal converdation 60-minute technical/competency interview with Engineering Managers Final 90 minute session with senior leadership (CDO, CTO More ❯

benefits An established, financial services group is on the lookout for a Head of Data Engineering to lead their data platform transformation - a critical migration from legacy systems (SQL Server) to modern Azure cloud technologies. You'll oversee a 40-person team of engineers (across the UK and offshore), guide delivery of critical regulatory and treasury projects … banking/financial services sector Strategic mindset with a delivery-focused leadership style Tech Environment: Azure Data Stack (Synapse, Databricks, Azure SQL, Power BI) SQL, Python Legacy systems primarily in SQL Server Interview Process: Initial 30-minute informal converdation 60-minute technical/competency interview with Engineering Managers Final 90 minute session with senior leadership (CDO, CTO More ❯

team: Set up an effective business partnering model by acting as the primary finance liaison for the Technology and Transformation teams Support decision-making around technology investments, capex, legacy system migration, and offshoring strategies Provide financial insight … into transformation initiatives and ensure alignment with business objectives FP&A: Conduct budgeting, forecasting, and variance analysis for technology spend Develop and maintain cost models for legacy systems, cloud migration, and outsourced services Monitor and report on key financial KPIs related to technology and transformation Process & Controls Development: Design and implement fit-for-purpose financial processes and … in finance business partnering within technology or transformation functions. Experience in a carve-out, PE-backed, or high-change environment is highly desirable. Strong understanding of legacy systems, cloud migration, and offshoring financial dynamics. Excellent stakeholder management and communication skills. Comfortable working in ambiguity and building processes from scratch. Please apply with a copy of your CV More ❯

for continuous improvement and innovative solutions Work on both front-end and back-end development with a focus on C#, WPF, ASP.NET, and SQL Server Support legacy systems built with VB.NET and WinForms The Junior C# Developer will have the following skills: A solid understanding of C#and .Net Framework Knowledge or experience working with WPFand ASP.NET for … modern application development Experience or familiarity with SQL Server for database management Willingness to work with VB.NETand WinFormsin legacy systems Familiarity with HTML, CSS, and JavaScriptfor front-end development is a plus Self-sufficient, with the initiative to identify and solve problems independently Enthusiastic about developing high-quality and reliable software Ideal Candidate: You have a passion More ❯

change at scale-connecting data, people, and platforms to deliver measurable impact. Benefits & Extras Executive-level role with significant influence on company direction Opportunity to modernize legacy systems and build a best-in-class data environment High-impact, highly visible role reporting directly to the CIO Collaborative and forward-thinking IT leadership team Culture that values innovation … SQL Server) Overseeing data governance and stewardship frameworks to ensure quality, security, and compliance Building and leading a cross-functional team spanning engineering, BI, governance, and architecture Replacing legacy analytics tools with scalable, user-friendly platforms like Power BI and QlikSense Driving stakeholder alignment and adoption across merchandising, marketing, operations, and supply chai Championing a data-driven culture … consolidating and modernizing enterprise data environments 15+ years of experience in data analytics leadership roles Familiarity with cloud-based tools like Snowflake, Databricks, and FiveTran and legacy systems Strong communication skills with the ability to influence at all levels Proven leadership within matrixed or multi-departmental teams Background in change management and organizational transformation Retail industry experience More ❯

problems. About the Role: You will spearhead the development and enhancement of enterprise-level reporting capabilities, leading the migration and integration of reporting frameworks from various legacy systems into Oracle Fusion. This role demands a commitment to ensuring data accuracy, performance, and business alignment, delivering reliable, insightful, and scalable reporting solutions in close collaboration with stakeholders. Key … Responsibilities: Lead the development and enhancement of enterprise-level reporting capabilities within Oracle Fusion. Lead the migration and integration of reporting frameworks from legacy systems into Oracle Fusion. Ensure data accuracy, performance, and business alignment of all reporting solutions. Collaborate closely with stakeholders to deliver reliable, insightful, and scalable reporting solutions. Essential Skills & Experience: Deep expertise in More ❯

define the long-term technical product vision while also getting into the details needed to drive day-to-day execution. You'll be the bridge between legacy systems and future-forward innovation-and manage a small team that's emotionally invested in their clients and brand, but who are hungry for smart, transformative change. Your key responsibilities … in this role you should be from a SAAS or PropTech business with an extensive technical product management background. You should have experience in working with legacy systems while being able to think strategically and commercially More ❯

digital transformation. As a Solution Architect in our Digital and Data team, youll help shape the future digital state of the organisation - leading the move from legacy systems to modern platforms. Youll be central to designing robust, compliant solutions aligned with enterprise standards, acting as a gatekeeper for technical design decisions. This is a unique opportunity to … influence a major systems revamp and ensure our technology meets the evolving needs of customers and stakeholders across the region. What you will be doing. Work flexibly and with integrity to support the needs of WMCA and the Digital and Data team. Develop, deliver, and support solutions architecture across the organisation. Understand and document business needs, translating them into … and software related. A working knowledge of at least 3 of the following areas; Information and Data Management, System Design and Development, Security (firewalls, VPN, intrusion detection and prevention systems), Application Management, ERP systems, CRM systems, Networking and Microsoft Solutions, Infrastructure. Strong knowledge of network, server, storage, and virtualisation technologies. Understanding of the relevant legislative framework and More ❯

Control Systems Engineer - WinCC | Warrington | £60,000 | UK Passport Required KO2's client, a specialist in advanced control systems and is seeking an experienced Control Systems Engineer with a deep understanding of WinCC, Siemens PLCs, and redundant server architecture. This is a full-time, permanent role based onsite in Warrington. Due to the nature of the work … candidates must hold a UK passport. The Role: The successful candidate will be involved in both the design and modification of complex control systems used in managing control systems that are used to control objects of high value. Key tasks include: Developing and modifying graphical interfaces for new and legacy systems using WinCC Pro Programming … SCADA systems to interface with databases for read/write operations Working with redundant WinCC servers and multiple operator stations across a high-density tag environment Integration and control of systems using Siemens S7, TIA Portal, and STL programming Interfacing with Plant Bus and Graphical Bus environments Onsite testing, with final FAT carried out by the client before More ❯