1 to 25 of 130 Permanent Legacy Applications Jobs in the UK

dynamic team of developers and contractors, playing a key role in designing scalable, modern software solutions and leading the transformation of legacy applications into cutting-edge, web-based platforms using APIs and industry-standard technologies. This is your chance to drive innovation, influence system architecture, and contribute … digital infrastructure. You will also colaborate with stakeholders to gather business requirements and translate them into robust technical solutions and modernize legacy applications into scalable, web-based platforms. Using modern technologies, you will champion best practices for software architecture, coding standards, and performance, as well as troubleshoot More ❯

dynamic team of developers and contractors, playing a key role in designing scalable, modern software solutions and leading the transformation of legacy applications into cutting-edge, web-based platforms using APIs and industry-standard technologies. This is your chance to drive innovation, influence system architecture, and contribute … digital infrastructure. You will also colaborate with stakeholders to gather business requirements and translate them into robust technical solutions and modernize legacy applications into scalable, web-based platforms. Using modern technologies, you will champion best practices for software architecture, coding standards, and performance, as well as troubleshoot More ❯

Owners, developers, and external stakeholders to define and work towards achievable goals. Here's What You Can Expect To Be Doing Building .NET Core applications Migrating legacy applications to .NET Core (Ruby and/or VB experience would be an advantage but not required) Working towards More ❯

JSON based Messaging. Experience on recent BizTalk versions including 2013. Strong knowledge of integration patterns, especially in integrating Portals/SSO, legacy applications, B2B Applications, external partners using BizTalk. Strong command on various BizTalk components like BRE and BAM and should have expertise in developing custom More ❯

/Senior/Lead levels to join their team. About the Team The Product Tech team is responsible for delivering a suite of Systems & Applications that support our Product Lifecycle and serve a diverse user base including Designers, Buyers, Merchandisers, Suppliers, and internal systems such as our Website, POS … assist in transforming the current monolithic system into a micro-service architecture. You will work on various high-profile projects, ensuring our systems and applications support our current and future product portfolio. As Next expands and adopts new initiatives, your work will help evolve our systems to support these … working practices, involvement in driving change, and the opportunity to improve customer service. The role also involves tackling challenges related to legacy applications and older code languages. You will contribute your analysis and development skills to create and enhance systems and applications, participate in out-of More ❯

optimization. Ensure minimal disruption to business operations during migration activities. Cloud Database Administration: Manage, monitor, and maintain databases within the cloud environment. Update legacy versions of SQL databases, ensuring compatibility with modern technologies and standards. Administer and manage Windows-based SQL environments across development, test, UAT, and production … editions. Create and implement comprehensive plans to update and migrate legacy databases. Collaborate with teams to resolve challenges involving legacy applications and their database dependencies. Infrastructure-as-Code (IaC): Design and deploy IaC solutions to automate database provisioning, scaling, and management. Collaborate with DevOps teams … Hands-on experience with Infrastructure-as-Code tools (Terraform, Azure DevOps, GitHub Actions). Proficiency in database migration techniques and tools, including updating legacy SQL versions. Solid understanding of CI/CD pipelines, automation, and DevOps practices. Excellent problem-solving, communication, and team collaboration skills. Preferred Qualifications: Certifications More ❯

Software Engineer | C#, SQL, Testing - Legacy Refactoring project @ a Systematic Hedge Fund Rate: £650-750 per day IR35: Outside Duration: 12 months+ Location: 3 days in the office per week in Moorgate/Liverpool Street We’re working with a high-performing, systematic hedge fund based in the … hands-on software engineer Strong C#/.NET and SQL background, ideally in data-centric or financial systems Solid experience refactoring legacy applications without full test coverage Testing; You must be a meticulous Tester in TDD. Excellent at writing characterisation tests to lock down behaviour before improving … pride in annotated, clean commits and structured workflows Having a ‘DevOps mindset’ and getting the importance of culture If you enjoy carefully improving legacy code, owning your application, and collaborating closely with a brilliant (and refreshingly small) trading and quant team, this one’s for you. Apply ASAP More ❯

Software Engineer | C#, SQL, Testing - Legacy Refactoring project @ a Systematic Hedge Fund Rate: £650-750 per day IR35: Outside Duration: 12 months+ Location: 3 days in the office per week in Moorgate/Liverpool Street We’re working with a high-performing, systematic hedge fund based in the … hands-on software engineer Strong C#/.NET and SQL background, ideally in data-centric or financial systems Solid experience refactoring legacy applications without full test coverage Testing; You must be a meticulous Tester in TDD. Excellent at writing characterisation tests to lock down behaviour before improving … pride in annotated, clean commits and structured workflows Having a ‘DevOps mindset’ and getting the importance of culture If you enjoy carefully improving legacy code, owning your application, and collaborating closely with a brilliant (and refreshingly small) trading and quant team, this one’s for you. Apply ASAP More ❯

Software Engineer | C#, SQL, Testing - Legacy Refactoring project @ a Systematic Hedge Fund Rate: £650-750 per day IR35: Outside Duration: 12 months+ Location: 3 days in the office per week in Moorgate/Liverpool Street We’re working with a high-performing, systematic hedge fund based in the … hands-on software engineer Strong C#/.NET and SQL background, ideally in data-centric or financial systems Solid experience refactoring legacy applications without full test coverage Testing; You must be a meticulous Tester in TDD. Excellent at writing characterisation tests to lock down behaviour before improving … pride in annotated, clean commits and structured workflows Having a ‘DevOps mindset’ and getting the importance of culture If you enjoy carefully improving legacy code, owning your application, and collaborating closely with a brilliant (and refreshingly small) trading and quant team, this one’s for you. Apply ASAP More ❯

Who we're looking for Specialist in C# and .NET Applications for Azure, with a focus on Full Stack Development capabilities and mastering end-to-end solution delivery. We are seeking a talented and motivated Developer with a strong background in developing applications using C# and .NET for … Azure. The ideal candidate will have essential skills in SQL, MVC, and WCF, alongside experience in modernising applications for Azure environments. This is an excellent opportunity for developers with 5+ years of experience looking to expand their expertise in cloud-based solutions and cutting-edge development practices. What you … ll be delivering Design, develop, and maintain applications using C# and .NET frameworks tailored for Azure. Collaborate with cross-functional teams to deliver scalable and efficient solutions. Utilise SQL for database development and management. Implement and manage application architecture with MVC and WCF standards. Contribute to application modernisation and More ❯

London H/Q (option to work out Suffolk, South Wales or even Dublin too!) 5 days per week onsite. ICT Manager (of Enterprise Applications) is responsible for leading the strategic direction, oversight, and governance of enterprise applications. This includes managing key suppliers, ensuring application performance, stability, and lifecycle … term sustainability. The role also involves the integration of new products into the portfolio, following mergers and acquisitions, and driving consistency and adoption of applications across all entities. Maintain an application service catalogue and identify shadow IT risks Develop exit strategies for key applications to ensure robust contingency … planning Drive decommissioning of legacy applications to optimise the application landscape Raise and track risks associated with applications to support enterprise risk management Expand and formalise supplier and contract management, covering security & regulatory elements, compliance, service metrics, cost control and supplier effectiveness Foster a strategic, long More ❯

London H/Q (option to work out Suffolk, South Wales or even Dublin too!) 5 days per week onsite. ICT Manager (of Enterprise Applications) is responsible for leading the strategic direction, oversight, and governance of enterprise applications. This includes managing key suppliers, ensuring application performance, stability, and lifecycle … term sustainability. The role also involves the integration of new products into the portfolio, following mergers and acquisitions, and driving consistency and adoption of applications across all entities. Maintain an application service catalogue and identify shadow IT risks Develop exit strategies for key applications to ensure robust contingency … planning Drive decommissioning of legacy applications to optimise the application landscape Raise and track risks associated with applications to support enterprise risk management Expand and formalise supplier and contract management, covering security & regulatory elements, compliance, service metrics, cost control and supplier effectiveness Foster a strategic, long More ❯

London H/Q (option to work out Suffolk, South Wales or even Dublin too!) 5 days per week onsite. ICT Manager (of Enterprise Applications) is responsible for leading the strategic direction, oversight, and governance of enterprise applications. This includes managing key suppliers, ensuring application performance, stability, and lifecycle … term sustainability. The role also involves the integration of new products into the portfolio, following mergers and acquisitions, and driving consistency and adoption of applications across all entities. Maintain an application service catalogue and identify shadow IT risks Develop exit strategies for key applications to ensure robust contingency … planning Drive decommissioning of legacy applications to optimise the application landscape Raise and track risks associated with applications to support enterprise risk management Expand and formalise supplier and contract management, covering security & regulatory elements, compliance, service metrics, cost control and supplier effectiveness Foster a strategic, long More ❯

basis for initially 12 months. We are seeking a Tester to join our clients team to help deliver the migration of legacy applications on JBoss EAP7 to JBoss EAP8, including: Update existing regression test packs to align with current company processes Contribute to a test strategy/… Page Object Model Capybara Selenium Net HTTP/HTTParty Savon SQL (DB2/PostgreSQL) Jenkins BDD (Behaviour Driven Development) Key responsibilities: Support migration of applications from JBoss EAP7 to JBoss EAP8 Creating and executing manual test scripts as needed Writing automated web application and REST/SOAP API tests … align with current company processes Create an automated test pipeline using Jenkins Nice to have: Experience migrating legacy systems Experience with JBoss applications Kubernetes/Docker Zephyr Scale Jira Please apply by submitting your latest CV for immediate review. Thanks, Unify More ❯

side logic of web and mobile applications. You will collaborate with front-end developers to integrate user-facing elements, optimize performance, and enhance legacy systems. This role involves troubleshooting, debugging, and implementing solutions that ensure security, efficiency, and alignment with business needs, ultimately driving innovation and improving … user experience. Key Responsibilities: Participate in the entire application lifecycle, focusing on coding and debugging Write clean code to develop functional web and mobile applications Troubleshoot and debug applications Participate in UI tests to optimize performance Manage cutting-edge technologies to improve legacy applications Collaborate More ❯

Cloud's browser based u ser interface to expose events and API calls to the agent's desktop session so that legacy applications can be integrated to Genesys . CX Email Expert- an enhancement to Genesys' existing email capability that adds the ability to park and resume More ❯

across a multi-cloud, high-transaction environment where compliance, trust, and communication are critical. You’ll work across Azure, GCP, and OCI, with legacy AWS components being transitioned to Azure. What You’ll Be Doing: Assist … on cloud security architecture, primarily across Azure, with some GCP and OCI. Partner with IT and the business to assess and secure key cloud applications and infrastructure. Assist in migrating and securing legacy applications into a newly structured cloud tenancy. Ensure alignment with compliance frameworks like More ❯

and mitigate technical debt , ensuring a balance between quick wins and long-term stability . Oversee the refactoring and modernization of legacy applications , ensuring observability, performance, and security . Collaborate with Chief Engineers and engineering teams to define best practices for ETL, data integration, and cloud adoption More ❯

and mitigate technical debt , ensuring a balance between quick wins and long-term stability . Oversee the refactoring and modernization of legacy applications , ensuring observability, performance, and security . Collaborate with Chief Engineers and engineering teams to define best practices for ETL, data integration, and cloud adoption More ❯

Core. Database expertise – working knowledge of SQL Server/T-SQL. Source control systems – proficient with Git. Security best practices – familiarity with securing web applications, handling vulnerability findings, and implementing security patches. Performance optimization – ability to identify and resolve performance bottlenecks across the stack. Experience maintaining and modernizing legacy applications – with a pragmatic approach to balancing short-term needs and long-term improvements. If this sounds like the role for you, click ‘apply now’ and a member of our team will be in touch. More ❯

Core. Database expertise – working knowledge of SQL Server/T-SQL. Source control systems – proficient with Git. Security best practices – familiarity with securing web applications, handling vulnerability findings, and implementing security patches. Performance optimization – ability to identify and resolve performance bottlenecks across the stack. Experience maintaining and modernizing legacy applications – with a pragmatic approach to balancing short-term needs and long-term improvements. If this sounds like the role for you, click ‘apply now’ and a member of our team will be in touch. More ❯

per annum + Benefits Drive the Future of Enterprise Migration We are seeking a Migration Architect to lead the transformation of mission-critical applications, data, and infrastructure. This role is ideal for an experienced architect with a deep understanding of migration strategies and cloud technologies, ensuring seamless transitions with … minimal disruption to business operations. Key Responsibilities: Own and manage the migration of legacy applications from planning to execution. Design and implement comprehensive migration strategies across cloud and on-premises environments . Assess existing systems to determine migration requirements and develop technical roadmaps . Lead high-impact More ❯

per annum + Benefits Drive the Future of Enterprise Migration We are seeking a Migration Architect to lead the transformation of mission-critical applications, data, and infrastructure. This role is ideal for an experienced architect with a deep understanding of migration strategies and cloud technologies, ensuring seamless transitions with … minimal disruption to business operations. Key Responsibilities: Own and manage the migration of legacy applications from planning to execution. Design and implement comprehensive migration strategies across cloud and on-premises environments . Assess existing systems to determine migration requirements and develop technical roadmaps . Lead high-impact More ❯

per annum + Benefits Drive the Future of Enterprise Migration We are seeking a Migration Architect to lead the transformation of mission-critical applications, data, and infrastructure. This role is ideal for an experienced architect with a deep understanding of migration strategies and cloud technologies, ensuring seamless transitions with … minimal disruption to business operations. Key Responsibilities: Own and manage the migration of legacy applications from planning to execution. Design and implement comprehensive migration strategies across cloud and on-premises environments . Assess existing systems to determine migration requirements and develop technical roadmaps . Lead high-impact More ❯

RDS, Lambda, CloudFormation, and API Gateway, ensuring alignment with business objectives. Define cloud adoption strategies, roadmaps, and migration plans to transition legacy applications and infrastructure to the cloud with minimal disruption. Design cost-effective cloud architectures leveraging AWS services, optimizing performance, security, compliance, and resource utilization. Use … such as EC2, S3, VPC, Lambda, RDS, CloudFormation, and IAM. Proven expertise in building highly available, fault-tolerant, and scalable architectures, and migrating complex applications to AWS (e.g., replatforming, rearchitecting). In-depth knowledge of AWS security best practices (IAM, VPC security, encryption, data protection) and compliance with industry … Step Functions. Familiarity with multi-cloud environments and integration with other cloud providers (e.g., Azure, GCP) and on-premises systems. Expertise in managing containerized applications using Docker, ECS, EKS, or Kubernetes, and deep knowledge of networking (VPC, Direct Connect, VPN, Route 53). Experience with CI/CD pipelines More ❯