1 to 25 of 122 Permanent Legacy Systems Jobs in London

leadership while serving as trusted leader/advisor, trainer and "Go To" person for the solution, both technically and strategically. Lead the implementation, customization, and ongoing optimization of enterprise systems, including Workday, Navision, Sub Hub, Informatica, and PeopleSoft, ensuring they align with business needs and industry best practices. Ensure scalability, security, and compliance by applying best practices in enterprise … with business units and IT stakeholders to assess current processes, identify gaps, and implement solutions that drive efficiency and innovation. Lead migration and upgrade projects for legacy systems, ensuring minimal disruption and maximizing system adoption across teams. Leverage AI/ML and analytics capabilities to enhance reporting, forecasting, and decision-making within these platforms. Lead end-to … end digital transformation initiatives, modernizing legacy systems and migrating critical business applications to cloud platforms. Ensure seamless data migration, system integrations, and performance tuning for high availability environments. Ensure we build solutions that leverage our cross-practice expertise and drive client value and CDW differentiation What we expect of you Minimum basic requirements 10+ years of experience More ❯

leadership while serving as trusted leader/advisor, trainer and "Go To" person for the solution, both technically and strategically. Lead the implementation, customization, and ongoing optimization of enterprise systems, including Workday, Navision, Sub Hub, Informatica, and PeopleSoft, ensuring they align with business needs and industry best practices. Ensure scalability, security, and compliance by applying best practices in enterprise … with business units and IT stakeholders to assess current processes, identify gaps, and implement solutions that drive efficiency and innovation. Lead migration and upgrade projects for legacy systems, ensuring minimal disruption and maximizing system adoption across teams. Leverage AI/ML and analytics capabilities to enhance reporting, forecasting, and decision-making within these platforms. Lead end-to … end digital transformation initiatives, modernizing legacy systems and migrating critical business applications to cloud platforms. Ensure seamless data migration, system integrations, and performance tuning for high availability environments. Ensure we build solutions that leverage our cross-practice expertise and drive client value and CDW differentiation What we expect of you Minimum basic requirements 10+ years of experience More ❯

helps clients continuously deliver value through quality software practices and expertise. We work for leading organizations like Tesco, ASOS, Santander, and The Salvation Army to modernise legacy systems, build new features and products, and adopt new technologies that enhance their software and development processes. We are looking for a strategic, consultative sales leader who thrives in a … product managers. We deliver high-quality software engineering, platform solutions, and technical consulting. Our work ranges from short discovery workshops to long-term projects like modernizing legacy systems, building new features, and creating full products. Projects can last anywhere from a few weeks to several years. You will work closely with our Sales Development Representative, and Campaign More ❯

HM Land Registry (HMLR) is undertaking one of the largest transformation programmes in government, modernising the digital systems that support over £7 trillion of property ownership. As a Senior Software Developer, you'll take a leading role in designing and delivering the systems and services that power this national infrastructure. Salary up to £60,800, 29% employer pension … Software Developer, you'll combine hands-on coding with technical leadership. You'll work in a multidisciplinary team of developers, testers, product managers and architects to build secure, scalable systems and help guide technical direction across your team. You'll also mentor colleagues and contribute to improving development processes and standards across the Software Development Practice. HMLR's Developers … work on a variety of projects that are central to their digital transformation. This includes rebuilding core registration and casework systems, geospatial data initiatives, developing new cloud-native services and modernising Legacy applications into scalable, containerised solutions. If you would like to find out more about the role, The Software Development profession and what it's like More ❯

HM Land Registry (HMLR) is undertaking one of the largest transformation programmes in government, modernising the digital systems that support over £7 trillion of property ownership. As a Senior Software Developer, you'll take a leading role in designing and delivering the systems and services that power this national infrastructure. Salary up to £60,800, 29% employer pension … Software Developer, you'll combine hands-on coding with technical leadership. You'll work in a multidisciplinary team of developers, testers, product managers and architects to build secure, scalable systems and help guide technical direction across your team. You'll also mentor colleagues and contribute to improving development processes and standards across the Software Development Practice. HMLR's Developers … work on a variety of projects that are central to their digital transformation. This includes rebuilding core registration and casework systems, geospatial data initiatives, developing new cloud-native services and modernising legacy applications into scalable, containerised solutions. If you would like to find out more about the role, The Software Development profession and what it's like More ❯

You've seen what technology can do. Now, imagine building the systems to make it happen from the ground up. An organisation dedicated to building public trust and setting professional standards is at a crossroads. Despite their critical mission, they've never had a dedicated Architecture team. Instead, this has been managed in silos by passionate individuals without a … impact. You'll be working as one architect in a small team managing a transformation, designing and owning the technology strategy from the ground up, and building scalable, secure systems that unify fragmented processes. It's not just about solving today's technology challenges, you'll be reshaping how the organisation operates, turning aging systems into a strategic … asset that drives trust, efficiency, and innovation. Why this role stands out: This isn't about maintaining systems or following a playbook. It's about building something that will last. You'll be the one to untangle years of Legacy systems, modernise fragmented processes, and build a technical architecture that not only works but sets a More ❯

designing and governing technical architectures that address critical non-functional needs such as performance, reliability, and resilience against cyber threats. Collaborating with other domains, they oversee the integration of systems to enable seamless interoperability and operational excellence. With a focus on modernising legacy systems and adopting innovative technologies, the Principal Technical Architect ensures that policing systems … C-suite and operational leaders alike. Demonstrated ability to lead governance processes and balance technical innovation with compliance and risk. Deep understanding of secure development principles, DevOps practices, and systems resilience. Relevant technical certifications (e.g. TOGAF, Azure Solutions Architect, AWS Certified Architect) desirable. Diversity, equity and inclusion We are committed to equal opportunities for all and will not discriminate More ❯

ASAP for 6 months - likely to extend About the Role We’re partnering with a financial client that’s undertaking a large-scale data transformation, modernising legacy systems and building a unified analytics platform in the cloud. As part of this initiative, you’ll play a key role in developing and optimising a Snowflake-based data warehouse … and delivering high-quality visualisations and reporting through Power BI. The role offers the chance to work on greenfield architecture, migrate legacy SQL Server solutions and collaborate closely with senior stakeholders on complex, high-impact data initiatives. What You’ll Be Doing Design, develop and maintain data pipelines and models using Snowflake, dbt and Python. Enhance … and support Power BI dashboards and data models, ensuring performance, accuracy and user accessibility. Contribute to the migration of legacy SQL Server (SSIS/SSAS/SSRS) systems into a modern Snowflake/Power BI environment. Work collaboratively with business users to understand requirements, translate them into technical solutions and deliver robust, scalable data products. Implement CI More ❯

ASAP for 6 months - likely to extend About the Role We’re partnering with a financial client that’s undertaking a large-scale data transformation, modernising legacy systems and building a unified analytics platform in the cloud. As part of this initiative, you’ll play a key role in developing and optimising a Snowflake-based data warehouse … and delivering high-quality visualisations and reporting through Power BI. The role offers the chance to work on greenfield architecture, migrate legacy SQL Server solutions and collaborate closely with senior stakeholders on complex, high-impact data initiatives. What You’ll Be Doing Design, develop and maintain data pipelines and models using Snowflake, dbt and Python. Enhance … and support Power BI dashboards and data models, ensuring performance, accuracy and user accessibility. Contribute to the migration of legacy SQL Server (SSIS/SSAS/SSRS) systems into a modern Snowflake/Power BI environment. Work collaboratively with business users to understand requirements, translate them into technical solutions and deliver robust, scalable data products. Implement CI More ❯

ASAP for 6 months - likely to extend About the Role We’re partnering with a financial client that’s undertaking a large-scale data transformation, modernising legacy systems and building a unified analytics platform in the cloud. As part of this initiative, you’ll play a key role in developing and optimising a Snowflake-based data warehouse … and delivering high-quality visualisations and reporting through Power BI. The role offers the chance to work on greenfield architecture, migrate legacy SQL Server solutions and collaborate closely with senior stakeholders on complex, high-impact data initiatives. What You’ll Be Doing Design, develop and maintain data pipelines and models using Snowflake, dbt and Python. Enhance … and support Power BI dashboards and data models, ensuring performance, accuracy and user accessibility. Contribute to the migration of legacy SQL Server (SSIS/SSAS/SSRS) systems into a modern Snowflake/Power BI environment. Work collaboratively with business users to understand requirements, translate them into technical solutions and deliver robust, scalable data products. Implement CI More ❯

ASAP for 6 months - likely to extend About the Role We’re partnering with a financial client that’s undertaking a large-scale data transformation, modernising legacy systems and building a unified analytics platform in the cloud. As part of this initiative, you’ll play a key role in developing and optimising a Snowflake-based data warehouse … and delivering high-quality visualisations and reporting through Power BI. The role offers the chance to work on greenfield architecture, migrate legacy SQL Server solutions and collaborate closely with senior stakeholders on complex, high-impact data initiatives. What You’ll Be Doing Design, develop and maintain data pipelines and models using Snowflake, dbt and Python. Enhance … and support Power BI dashboards and data models, ensuring performance, accuracy and user accessibility. Contribute to the migration of legacy SQL Server (SSIS/SSAS/SSRS) systems into a modern Snowflake/Power BI environment. Work collaboratively with business users to understand requirements, translate them into technical solutions and deliver robust, scalable data products. Implement CI More ❯

HM Land Registry (HMLR) are modernising the systems and services that underpin property ownership across England and Wales - some of the most valuable data in the UK economy. As a Software Developer, you'll play an important role in designing, building and supporting the digital services that help secure property rights and enable the housing market to function. Salary … work in multidisciplinary agile teams with product managers, delivery managers, testers, business analysts and user researchers. Together they design, build and maintain digital cloud services and legacy systems that power HMLR's core services. The community promotes modern engineering standards, continuous improvement and peer learning, offering opportunities to collaborate across teams, contribute to communities of practice and … built and operated across the organisation. HMLR's Developers work on a variety of projects that are central to their digital transformation. This includes rebuilding core registration and casework systems, geospatial data initiatives, developing new cloud-native services and modernising legacy applications into scalable, containerised solutions. If you would like to find out more about the role More ❯

scalable, secure, and reusable API architectures. • Establish API governance, lifecycle management, and versioning standards. Solution Design & Integration • Lead and document the design of end-to-end API solutions across systems (internal and external). • Ensure seamless integration with legacy systems, third-party services, and cloud platforms. • Collaborate with enterprise and domain to align solutions. Security & Compliance More ❯

scalable, secure, and reusable API architectures. • Establish API governance, lifecycle management, and versioning standards. Solution Design & Integration • Lead and document the design of end-to-end API solutions across systems (internal and external). • Ensure seamless integration with legacy systems, third-party services, and cloud platforms. • Collaborate with enterprise and domain to align solutions. Security & Compliance More ❯

scalable, secure, and reusable API architectures. • Establish API governance, lifecycle management, and versioning standards. Solution Design & Integration • Lead and document the design of end-to-end API solutions across systems (internal and external). • Ensure seamless integration with legacy systems, third-party services, and cloud platforms. • Collaborate with enterprise and domain to align solutions. Security & Compliance More ❯

scalable, secure, and reusable API architectures. • Establish API governance, lifecycle management, and versioning standards. Solution Design & Integration • Lead and document the design of end-to-end API solutions across systems (internal and external). • Ensure seamless integration with legacy systems, third-party services, and cloud platforms. • Collaborate with enterprise and domain to align solutions. Security & Compliance More ❯

a Microsoft-centric, Azure-native estate. This is a greenfield opportunity to define architecture strategy, governance frameworks, and drive transformation. * Define data architecture strategy for disparate legacy systems across numerous business lines. * Maximise £200k+ annual Microsoft E5 licensing investment. * Design CSS portal multi-tenancy architecture enabling US enterprise expansion. * Establish architecture governance appropriate for scale. * Optimise Azure More ❯

a Microsoft-centric, Azure-native estate. This is a greenfield opportunity to define architecture strategy, governance frameworks, and drive transformation. * Define data architecture strategy for disparate legacy systems across numerous business lines. * Maximise £200k+ annual Microsoft E5 licensing investment. * Design CSS portal multi-tenancy architecture enabling US enterprise expansion. * Establish architecture governance appropriate for scale. * Optimise Azure More ❯

Technical Business Analyst - Insurance Claims Systems Location: Hybrid – London (2 days on-site) Salary: Up to £120,000 + full package Company: Leading InsurTech Industry: Lloyd’s/London Market Insurers About the Company: Join a forward-thinking InsurTech organisation that is transforming the Lloyd’s and London Market insurance landscape. Our client works with leading insurers to deliver … complex claims transformation and implementation programmes, modernising legacy systems and improving operational efficiency across the market. They are now seeking a Technical Business Analyst to join their expanding Claims Systems practice, working at the forefront of digital transformation in insurance. Key Responsibilities: Act as the bridge between business stakeholders and technical teams throughout the claims system … improvement of claims handling processes and system performance. Skills and Experience: Proven experience as a Business Analyst or Technical Business Analyst within the insurance sector. Strong background in claims systems (such as Guidewire, Sequel Claims, Sapiens, or bespoke Lloyd’s Market platforms). Deep understanding of Lloyd’s and London Market processes, data flows, and regulatory requirements. Technical proficiency More ❯

Technical Business Analyst - Insurance Claims Systems Location: Hybrid – London (2 days on-site) Salary: Up to £120,000 + full package Company: Leading InsurTech Industry: Lloyd’s/London Market Insurers About the Company: Join a forward-thinking InsurTech organisation that is transforming the Lloyd’s and London Market insurance landscape. Our client works with leading insurers to deliver … complex claims transformation and implementation programmes, modernising legacy systems and improving operational efficiency across the market. They are now seeking a Technical Business Analyst to join their expanding Claims Systems practice, working at the forefront of digital transformation in insurance. Key Responsibilities: Act as the bridge between business stakeholders and technical teams throughout the claims system … improvement of claims handling processes and system performance. Skills and Experience: Proven experience as a Business Analyst or Technical Business Analyst within the insurance sector. Strong background in claims systems (such as Guidewire, Sequel Claims, Sapiens, or bespoke Lloyd’s Market platforms). Deep understanding of Lloyd’s and London Market processes, data flows, and regulatory requirements. Technical proficiency More ❯

Technical Business Analyst - Insurance Claims Systems Location: Hybrid – London (2 days on-site) Salary: Up to £120,000 + full package Company: Leading InsurTech Industry: Lloyd’s/London Market Insurers About the Company: Join a forward-thinking InsurTech organisation that is transforming the Lloyd’s and London Market insurance landscape. Our client works with leading insurers to deliver … complex claims transformation and implementation programmes, modernising legacy systems and improving operational efficiency across the market. They are now seeking a Technical Business Analyst to join their expanding Claims Systems practice, working at the forefront of digital transformation in insurance. Key Responsibilities: Act as the bridge between business stakeholders and technical teams throughout the claims system … improvement of claims handling processes and system performance. Skills and Experience: Proven experience as a Business Analyst or Technical Business Analyst within the insurance sector. Strong background in claims systems (such as Guidewire, Sequel Claims, Sapiens, or bespoke Lloyd’s Market platforms). Deep understanding of Lloyd’s and London Market processes, data flows, and regulatory requirements. Technical proficiency More ❯

Technical Business Analyst - Insurance Claims Systems Location: Hybrid – London (2 days on-site) Salary: Up to £120,000 + full package Company: Leading InsurTech Industry: Lloyd’s/London Market Insurers About the Company: Join a forward-thinking InsurTech organisation that is transforming the Lloyd’s and London Market insurance landscape. Our client works with leading insurers to deliver … complex claims transformation and implementation programmes, modernising legacy systems and improving operational efficiency across the market. They are now seeking a Technical Business Analyst to join their expanding Claims Systems practice, working at the forefront of digital transformation in insurance. Key Responsibilities: Act as the bridge between business stakeholders and technical teams throughout the claims system … improvement of claims handling processes and system performance. Skills and Experience: Proven experience as a Business Analyst or Technical Business Analyst within the insurance sector. Strong background in claims systems (such as Guidewire, Sequel Claims, Sapiens, or bespoke Lloyd’s Market platforms). Deep understanding of Lloyd’s and London Market processes, data flows, and regulatory requirements. Technical proficiency More ❯

Engineer to join a major cloud transformation programme for a global logistics and maritime services organisation. This role sits within a high-performing engineering team responsible for migrating core systems and services to the cloud a key strategic initiative that drives scalability, resilience, and global efficiency. The Role You’ll play a pivotal role in architecting, automating, and supporting … long-term sustainability. Key Responsibilities Lead infrastructure design and deployment using Terraform (IaC) Build and manage Kubernetes clusters to support containerised workloads Support the migration of legacy systems to cloud platforms (AWS, Azure, or GCP) Develop and optimise CI/CD pipelines for cloud-native delivery Create automation scripts and tools — ideally using Python Implement monitoring, alerting More ❯

Engineer to join a major cloud transformation programme for a global logistics and maritime services organisation. This role sits within a high-performing engineering team responsible for migrating core systems and services to the cloud a key strategic initiative that drives scalability, resilience, and global efficiency. The Role You’ll play a pivotal role in architecting, automating, and supporting … long-term sustainability. Key Responsibilities Lead infrastructure design and deployment using Terraform (IaC) Build and manage Kubernetes clusters to support containerised workloads Support the migration of legacy systems to cloud platforms (AWS, Azure, or GCP) Develop and optimise CI/CD pipelines for cloud-native delivery Create automation scripts and tools — ideally using Python Implement monitoring, alerting More ❯

Engineer to join a major cloud transformation programme for a global logistics and maritime services organisation. This role sits within a high-performing engineering team responsible for migrating core systems and services to the cloud a key strategic initiative that drives scalability, resilience, and global efficiency. The Role You’ll play a pivotal role in architecting, automating, and supporting … long-term sustainability. Key Responsibilities Lead infrastructure design and deployment using Terraform (IaC) Build and manage Kubernetes clusters to support containerised workloads Support the migration of legacy systems to cloud platforms (AWS, Azure, or GCP) Develop and optimise CI/CD pipelines for cloud-native delivery Create automation scripts and tools — ideally using Python Implement monitoring, alerting More ❯