1 to 25 of 28 Remote Legacy Systems Jobs in the South East

Senior .NET/C# Developer Oracle to PostgreSQL Migration: Our client is embarking on a strategic transformation of a legacy enterprise platform, rebuilding a … long-standing PHP and Oracle-based system into a .NET (C#) and PostgreSQL architecture. Seeking talented developers who are excited to work at the intersection of legacy systems, modern architecture and cutting-edge development tooling. Your Responsibilities: Re-engineer Oracle PL/SQL logic into performant and maintainable C# services. Design and build .NET components that interact … strategies and support comprehensive documentation efforts. What You'll Bring: Experience developing in .NET/C#, particularly in backend and data access layers. Proven success migrating legacy systems, especially from Oracle to PostgreSQL or similar. Strong working knowledge of Oracle PL/SQL and the ability to translate procedural logic into C#. Solid experience with PostgreSQL, including 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 ❯

Apply online only) 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 ❯

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 ❯

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 ❯

for application-related queries, triaging and resolving issues while working closely with departmental heads to improve user satisfaction and productivity. You will lead the migration from legacy systems such as ShareFile to modern platforms like SharePoint, guiding users through significant change and embedding new ways of working. You will also support business transformation projects, manage supplier relationships … Applications Manager, you will: Manage and support the Microsoft technology stack, including SharePoint, Copilot, and other SaaS applications such as Adobe and SendGrid Lead migration from legacy systems like ShareFile to modern platforms such as SharePoint Act as the primary internal contact for application-related queries, resolving issues efficiently Engage with heads of department to understand needs … should have experience with the following: Microsoft 365 suite, particularly SharePoint and Teams SaaS application management, including tools such as Adobe Creative Cloud and SendGrid Service desk and ticketing systems, preferably Freshdesk or similar Understanding of software development life cycles (SDLC) and supplier management Awareness of IT security principles and best practices Ability to promote and support adoption of More ❯

C#) architecture and we're looking for an experienced Oracle Developer to play a key role in this journey. You'll work at the intersection of legacy systems and new architecture, translating complex logic into scalable, maintainable C# code. What You'll Be Working On: Rewriting complex PL/SQL logic into performant, readable C# code. Decoupling … types into .NET equivalents, ensuring performance and integrity. Collaborating on the migration from Oracle to Postgres or MySQL. Supporting a hybrid environment during rollout, where legacy Oracle systems and new .NET components coexist. Utilising AI-assisted tools for code analysis, documentation, and transformation. What We're Looking For: Oracle PL/SQL experience, including deep expertise in … in database migration from Oracle to Postgres or MySQL. Excellent analytical and problem-solving skills, with strong attention to detail. Clear communication skills with the ability to explain complex systems and document processes. Desirable Experience: Experience working with PHP systems that integrate with Oracle databases. Familiarity with AI-assisted development tools. Background in data modelling, version control of More ❯

tackle complex challenges using tools like Hadoop, Spark, and modern visualisation frameworks while implementing automation that drives government efficiency. You'll collaborate with stakeholders to transform legacy systems, implement data governance frameworks, and ensure solutions meet the highest security standards. Our deep expertise in public sector digital transformation and established presence across defence and government organisations offer … unique opportunities to shape the future of UK public services through innovative data-driven solutions. With our strong technical foundation and focus on mission-critical systems, you'll be part of a team delivering nationally significant projects that have a real impact on public service delivery. If you're passionate about applying cutting-edge data science and engineering in … you will: Data Engineering Focus: Design, implement, and maintain scalable data pipelines and ETL processes Develop and maintain data warehouses and data lakes Implement data quality monitoring and validation systems Create and maintain data documentation and cataloguing systems Optimize data storage and retrieval systems Implement data security and governance frameworks Build and maintain data APIs and services More ❯

provide technical guidance and oversight of customisations, including plugins, workflows, Power Automate flows, and JavaScript, ensuring efficient, reusable, and well-documented code.* Integrate D365 CE with other applications and systems using tools like Azure Logic Apps, Power Automate, and custom APIs.* Oversee the Dynamics 365 environment to enable the successful delivery of their Digital Transformation.* Manage and control D365 … and maintenance for D365 CE applications, troubleshoot issues, and implement fixes and enhancements.* Assist in data migration tasks, ensuring accurate and secure transfer of data from legacy systems to D365 CE* Collaborate with cross-functional teams, including business analysts, project managers, and other developers, to deliver high-quality solutions.* Stay updated with the latest D365 CE features More ❯

a growing Software Consultancy/MSP. As a Senior Developer/Consultant you will work with a long established client to help them modernise and transform legacy systems to modern microservices, cloud based solutions to support business growth. You'll collaborate with the client to understand their business needs and take a lead role in developing and … three times per month. About you: You are an experienced Software Developer/Consultant with strong C# .Net Core skills You have experience with API development, microservices, Cloud based systems (AWS, Azure or GCP) You have a thorough understanding of Computer Science fundamentals such as OOP, Design Patterns, Data Structures You have excellent communication and collaboration skills and are More ❯

healthcare providers. We bring together technology, data, and human-centred design to improve patient experiences, streamline clinical workflows, and enable smarter decision-making. Our work supports delivering integrated care systems, interoperable platforms, cloud-native solutions, and AI-powered tools built around user needs. The role We're looking for an Enterprise Solution Architect to join our growing team and … Contribute to business case development and procurement processes by advising on architectural trade-offs. Maintain awareness of emerging technologies and advise clients on opportunities to modernise legacy systems or adopt innovation responsibly. Champion architecture best practices and coach other team members on digital health architecture principles. Required skills and knowledge Proven expertise in enterprise or solution architecture … to technical and non-technical audiences. Strong stakeholder engagement and communication skills across clinical, business, and technical teams. Experience working on projects related to Community Diagnostic Centres, Integrated Care Systems, or Electronic Patient Records. Understanding of AI, ML, and data analytics applications in healthcare. Exposure to openEHR, IHE profiles, and OpenAPI specifications. TOGAF, BCS, or relevant architecture certification. Experience More ❯

Access Developer - Hybrid (1-2 days in HQ) - £60,000-70,000 + benefits This role will take ownership of a legacy product developed in Microsoft Access (Front End) and SQL. The successful candidate will maintain, document, and optimise the current product, whilst - in due course (and in partnershp with a 3rd party) - design, develop, and implement reusable … based platform. Maintain and optimise the existing Access database, ensuring its reliability and efficiency. Produce comprehensive, high-level technical documentation, ensuring code is well-commented and maintainable. Rewrite legacy services to ensure they are modular and reusable in future system developments. Review and refine the SQL database, focusing on building a robust relational database model. Access Developer - Essential … monitoring. Familiarity with the wider Microsoft technology stack/C# and .NET. Business process analysis and optimisation experience. Access Developer - Skills and qualifications: Skilled in managing legacy systems while facilitating modernisation efforts. Strong documentation and communication skills. Ability to work independently and collaboratively across hybrid work environments. In return for joining, you will be provided with industry More ❯

and documentation Running Jira and Agile ceremonies Working with the product manager to plan sprints and prioritize workload for team members Build and maintain robust, secure, and maintainable software systems end to end. Develop loosely coupled, layered software components ensuring they are replaceable, testable, and version-controlled with minimal impact on others. Embrace Clean Code and SOLID principles: your … testing frameworks. Solid understanding of RESTful services and API design. Strong understanding of software design principles (SOLID, DRY or Clean Code). Comfortable navigating and maintaining legacy systems when needed. Experience writing unit and integration tests using JUnit or similar frameworks. Excellent problem-solving skills and attention to detail. Experience in agile environments and working with ticketing … systems (e.g., Jira). Proficiency with Git and modern development workflows (CI/CD). Who are ClearCourse? ClearCourse is a disruptive tech company with one mission to help our customers businesses become even better As a business, were growing (900+ employees in 5 years to be exact), currently providing more than 40 software and payment solutions to More ❯

in a short space of time and place emphasis on well structured, high quality code and a modern technical environment for their Devs to enjoy. Having replaced their legacy system over the past few years they are now looking at new functionality and capability of the system, working across 50 applications. You'll be a proponent of Software More ❯

services, and user platforms aligned with business needs • Manage relationships with internal teams and third-party IT providers ensuring high-quality service delivery • Support migration from legacy systems (particularly Citrix) to modern desktop environments • Oversee IT operations including systems availability, team performance, hardware lifecycle, and incident resolution • Liaise with UK and international office stakeholders to meet More ❯

across complex and sensitive client environments. This is a hands-on internal testing role, not web application focused, where you'll be expected to work independently and navigate challenging systems with confidence. This role is suited to testers who thrive in technically demanding scenarios, want autonomy, and are motivated by work with real-world impact. Key Responsibilities Conduct internal … penetration testing Strong knowledge of Active Directory exploitation techniques (privilege escalation, lateral movement, etc.) Confident working in high-stakes, sensitive environments Strong command-line skills across Windows and Linux systems Ability to work through legacy systems, unpatched software, and environments with technical debt Desirable Skills Python scripting or automation experience Understanding of Operational Technology (OT) networks More ❯

a talented Figaro Developer to join their Custody, Trading and Investments (CTI) product development team. This role plays a key part in enhancing the Figaro platform, supporting business-critical systems and delivering technical change that directly impacts operational excellence and client outcomes. The successful candidate will be responsible for configuring, developing, integrating and supporting the Figaro application. You will … that align with business objectives. You will also partner with product managers and users to design and implement enhancements, troubleshoot issues, and support ongoing migration from legacy systems to modern architectures. To be considered, you must have proven experience working with the Figaro platform in a financial services or wealth management environment. Excellent SQL skills are essential … Familiarity with See/Change source control, TDD and best-practice development methodologies is highly desirable. Just as important will be your ability to interpret business requirements, analyse complex systems, and communicate effectively with technical and non-technical stakeholders alike. This is an outstanding opportunity to join a collaborative and forward-thinking development team in a permanent position, with More ❯

S/4HANA implementations-ensuring data integrity, quality, and readiness for go-live. You'll work across functional and technical teams to deliver seamless transitions from legacy systems to modern cloud-based environments, particularly in enterprise-scale settings. What You'll Be Doing Managing the data workstream on large SAP S/4HANA programmes Leading the design More ❯

per day Inside Ir35 Contract role for an experienced delivery manager with experience in Salesforce implementation required for a large programme of works to replace legacy systems with Salesforce CRM. You will need to have existing Salesforce CRM experience and implementation experience, along with being able to understand and articulate the technical delivery and data migration side. More ❯

across the data lifecycle Collaborating with Principal ML Engineers, Product Managers, and Engineering Directors to solve high-impact business problems Championing data platform evolution from fragmented legacy systems to streamlined, scalable infrastructure SKILLS AND EXPERIENCE The successful Principal Data Engineer will have the following skills and experience: 7+ years in data engineering, ideally within consumer-facing tech More ❯

removing blockers, and ensuring critical infrastructure projects are delivered with speed and precision. You’ll take ownership of key ICT initiatives including data centre exits, cloud migrations, and legacy system decommissioning. Your role will ensure that teams stay focused, obstacles are resolved quickly, and milestones are consistently achieved. Responsibilities: Own and deliver multiple infrastructure projects from scoping to More ❯

Salary: £40k - £50k A major public sector organisation is seeking an experienced ADF/SSIS/Azure Integration Developer to support the delivery of a critical programme modernising legacy integration systems. As part of the central IT team, you'll play a key role in building and su... More ❯

Salary: £40k - £50k A major public sector organisation is seeking an experienced ADF/SSIS/Azure Integration Developer to support the delivery of a critical programme modernising legacy integration systems. As part of the central IT team, you'll play a key role in building and supporting scalable solutions using Microsoft Azure technologies. This role focuses on … Agile and structured delivery frameworks. Desirable Experience migrating legacy SSIS workloads to ADF in cloud environments. Background in education, public sector, or similarly complex organisations. Familiarity with systems such as student records, HR, or finance platforms. ITIL Foundation or Microsoft Azure certifications. What's on Offer You'll be part of a forward-looking organisation delivering high More ❯

Salary: £40k - £50k A major public sector organisation is seeking an experienced ADF/SSIS/Azure Integration Developer to support the delivery of a critical programme modernising legacy integration systems. As part of the central IT team, you'll play a key role in building and supporting scalable solutions using Microsoft Azure technologies. This role focuses on … Agile and structured delivery frameworks. Desirable Experience migrating legacy SSIS workloads to ADF in cloud environments. Background in education, public sector, or similarly complex organisations. Familiarity with systems such as student records, HR, or finance platforms. ITIL Foundation or Microsoft Azure certifications. What's on Offer You'll be part of a forward-looking organisation delivering high More ❯

Architecture team, you will collaborate closely with stakeholders, including enterprise architects, business analysts & product owners, project managers, developers, engineers, and system administrators, to deliver successful outcomes. All the company systems fall under the responsibility of the EA Team, covering technologies including Microsoft, Oracle, Salesforce and MuleSoft, both Cloud-based and on-premises. Responsibilities : •Architect end-to-end technology solutions … Proven track record in architecting and delivering complex IT solutions simply and effectively. •Experienced in change environments, across waterfall and agile/iterative methodologies. •Background in high-volume transactional systems and legacy system modernization. •Skilled in cloud migrations and cloud-native architectures. •Excellent analytical and problem-solving abilities, balancing technical and business needs. Benefits : •Flexibility at the More ❯