151 to 175 of 196 Legacy Systems Jobs in London

Role An early-stage startup is redefining how software is built for the maritime supply chain, tackling fragmentation, manual processes, and legacy systems at scale. Led by repeat founders and seasoned industry executives, the company is entering a critical build and scale phase and is hiring ...

data modelling. Skilled in building end-to-end business process applications, configuring workflows, implementing business rules, managing records, and integrating Appian with external systems via REST APIs, web services, and connected systems. API Development & Integration - Proficient in designing and building RESTful APIs using FastAPI, Flask, or Django REST Framework … models and automation services. Experience with API authentication (OAuth, JWT), rate limiting, error handling, API documentation (Swagger/OpenAPI), webhooks, and integrating disparate systems to create seamless automated workflows. Document Processing & OCR - Experience implementing intelligent document processing solutions using OCR technologies (Tesseract, Azure AI Document Intelligence, natural language processing ...

data modelling. Skilled in building end-to-end business process applications, configuring workflows, implementing business rules, managing records, and integrating Appian with external systems via REST APIs, web services, and connected systems. API Development & Integration - Proficient in designing and building RESTful APIs using FastAPI, Flask, or Django REST Framework … models and automation services. Experience with API authentication (OAuth, JWT), rate limiting, error handling, API documentation (Swagger/OpenAPI), webhooks, and integrating disparate systems to create seamless automated workflows. Document Processing & OCR - Experience implementing intelligent document processing solutions using OCR technologies (Tesseract, Azure AI Document Intelligence, natural language processing ...

data modelling. Skilled in building end-to-end business process applications, configuring workflows, implementing business rules, managing records, and integrating Appian with external systems via REST APIs, web services, and connected systems. API Development & Integration - Proficient in designing and building RESTful APIs using FastAPI, Flask, or Django REST Framework … models and automation services. Experience with API authentication (OAuth, JWT), rate limiting, error handling, API documentation (Swagger/OpenAPI), webhooks, and integrating disparate systems to create seamless automated workflows. Document Processing & OCR - Experience implementing intelligent document processing solutions using OCR technologies (Tesseract, Azure AI Document Intelligence, natural language processing ...

data modelling. Skilled in building end-to-end business process applications, configuring workflows, implementing business rules, managing records, and integrating Appian with external systems via REST APIs, web services, and connected systems. API Development & Integration - Proficient in designing and building RESTful APIs using FastAPI, Flask, or Django REST Framework … models and automation services. Experience with API authentication (OAuth, JWT), rate limiting, error handling, API documentation (Swagger/OpenAPI), webhooks, and integrating disparate systems to create seamless automated workflows. Document Processing & OCR - Experience implementing intelligent document processing solutions using OCR technologies (Tesseract, Azure AI Document Intelligence, natural language processing ...

seeking an experienced Data Architect with strong MariaDB expertise to lead the technical design and migration approach. This role focuses on migrating Legacy SQL-based data into an AWS environment , with MariaDB as the primary target database and AWS S3 used for storage and staging. Key Responsibilities Define … Data Architect in central government Strong hands-on experience designing and delivering solutions using MariaDB Experience migrating data from Legacy SQL systems into MariaDB Solid AWS experience, particularly S3 Strong understanding of data governance and security in regulated environments Excellent stakeholder communication skills Active SC clearance ...

strategic Source-to-Pay solution. This role is accountable for end-to-end program delivery, governance, stakeholder management, and performance oversight of the Systems Integrator (SI) and other delivery partners. The Program Manager ensures business outcomes are achieved on time, within budget, and to agreed quality standards, while minimizing … making forums for S/4HANA ecosystem. Define program scope, roadmap, milestones, dependencies, and success metrics Manage program budget, benefits realization, and risk management Systems Integrator (SI) Management Act as the primary client-side lead for the Systems Integrator Hold SI accountable for delivery, quality, timelines, and contractual ...

strategic Source-to-Pay solution. This role is accountable for end-to-end program delivery, governance, stakeholder management, and performance oversight of the Systems Integrator (SI) and other delivery partners. The Program Manager ensures business outcomes are achieved on time, within budget, and to agreed quality standards, while minimizing … making forums for S/4HANA ecosystem. Define program scope, roadmap, milestones, dependencies, and success metrics Manage program budget, benefits realization, and risk management Systems Integrator (SI) Management Act as the primary client-side lead for the Systems Integrator Hold SI accountable for delivery, quality, timelines, and contractual ...

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 … 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 ...

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 … 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 ...

public sector organisations across the UK and the US. They’ve recently gone through significant investment and acquisition, and are now unifying multiple legacy products into a modern, data-driven platform. This is a genuine “build the future, not just maintain the past” opportunity. The role … skills in Java and JavaScript/TypeScript and Angular, preferably from a SaaS environment. Is comfortable getting into complex, occasionally confusing legacy systems and untangling them Has experience leading or mentoring an engineering team (formal line management or de facto tech lead) Can influence architecture and technical ...

build something category-defining - not incremental Why It’s Special You’ll be joining at the zero-to-one stage: no legacy systems, no slow processes, and complete freedom to define how a new category should look, feel, and communicate. You’ll partner directly with senior leadership ...

build something category-defining - not incremental Why It’s Special You’ll be joining at the zero-to-one stage: no legacy systems, no slow processes, and complete freedom to define how a new category should look, feel, and communicate. You’ll partner directly with senior leadership ...

regulatory frameworks Strong knowledge of authentication protocols, RBAC, and lifecycle management workflows Experience working in complex environments with multiple integrations and legacy systems Track record of delivering robust, scalable, and future‐proof IAM solutions to reduce risk and ensure compliance The Details: Initial contract: 3 months Start ...

regulatory frameworks Strong knowledge of authentication protocols, RBAC, and lifecycle management workflows Experience working in complex environments with multiple integrations and legacy systems Track record of delivering robust, scalable, and future‐proof IAM solutions to reduce risk and ensure compliance The Details: Initial contract: 3 months Start ...

This role is critical for technical readiness, involving the design of integration patterns that will connect the new HCM with crucial internal and external systems across HR, Finance, and Payroll. The Role: End-to-End Integration Strategy & Delivery You will report directly to the Senior Technical Delivery Manager, acting … PECI, and APIs. Middleware Expertise: Leverage experience with middleware platforms (e.g., MuleSoft, Boomi, Azure Integration Services) to connect Workday to third-party and legacy systems. Delivery Management: Oversee the build, testing, and secure deployment of multiple integrations in parallel, collaborating closely with IT and external vendors. Compliance: Produce ...

sessions. Build custom Canvas and Model-Driven apps, automation flows, dashboards, and data integrations. Integrate solutions with Microsoft 365, Dynamics 365, Azure, and legacy systems. Provide technical leadership, mentoring, and support across UAT, deployment, and post-launch phases. Ensure solutions meet public-sector standards for accessibility, security … Azure ecosystems. Awareness of data security, GDPR, and accessibility best practices. Ability to work independently in client-facing environments. Desirable Skills Experience with legacy-to-cloud migration in the public sector. Knowledge of GDS, PRINCE2, ITIL, or similar frameworks. Familiarity with ALM, Azure DevOps, GitHub, or Bitbucket. Strong ...

sessions. Build custom Canvas and Model-Driven apps, automation flows, dashboards, and data integrations. Integrate solutions with Microsoft 365, Dynamics 365, Azure, and legacy systems. Provide technical leadership, mentoring, and support across UAT, deployment, and post-launch phases. Ensure solutions meet public-sector standards for accessibility, security … Azure ecosystems. Awareness of data security, GDPR, and accessibility best practices. Ability to work independently in client-facing environments. Desirable Skills Experience with legacy-to-cloud migration in the public sector. Knowledge of GDS, PRINCE2, ITIL, or similar frameworks. Familiarity with ALM, Azure DevOps, GitHub, or Bitbucket. Strong ...

recommendations You will work closely with Experis but own the solutioning and architecture . Current Landscape (High-Level) Multiple legacy Dynamics NAV systems (NAV09, NAV15) Partially upgraded Business Central 14 , heavily customised POS migrated from LS Retail to Teamwork Commerce Legacy NAV-based Warehouse Management … roadmap by Jan–Feb 2026 Target implementation start April 2026 Required Profile Must Have 15+ years with Dynamics NAV/Business Central Strong retail systems integration experience Proven pre-sales/discovery/solution architecture background Experience integrating: POS (Teamwork Commerce highly desirable) ERP (Business Central – Finance & Inventory) Warehouse ...

recommendations You will work closely with Experis but own the solutioning and architecture . Current Landscape (High-Level) Multiple legacy Dynamics NAV systems (NAV09, NAV15) Partially upgraded Business Central 14 , heavily customised POS migrated from LS Retail to Teamwork Commerce Legacy NAV-based Warehouse Management … roadmap by Jan–Feb 2026 Target implementation start April 2026 Required Profile Must Have 15+ years with Dynamics NAV/Business Central Strong retail systems integration experience Proven pre-sales/discovery/solution architecture background Experience integrating: POS (Teamwork Commerce highly desirable) ERP (Business Central – Finance & Inventory) Warehouse ...

report on data security policies. Maintain good and accurate documentation on business applications. Work with wider operations teams and various departments to ensure systems and functionality are documented well, along with ensuring full training and support mechanisms during handovers. Keep updated with new technology trends and align and adapt … with user's needs, planning updates to systems accordingly. Support the rest of the IT team as required. Skillsets that are important for this one: Demonstratable experience in Microsoft Dynamics 365 and Microsoft Power Platform. Microsoft Certified to either Dynamics 365 Business Central Developer Associate level or Microsoft Dynamics ...

report on data security policies. Maintain good and accurate documentation on business applications. Work with wider operations teams and various departments to ensure systems and functionality are documented well, along with ensuring full training and support mechanisms during handovers. Keep updated with new technology trends and align and adapt … with user's needs, planning updates to systems accordingly. Support the rest of the IT team as required. Skillsets that are important for this one: Demonstratable experience in Microsoft Dynamics 365 and Microsoft Power Platform. Microsoft Certified to either Dynamics 365 Business Central Developer Associate level or Microsoft Dynamics ...

sessions (sequence gaps, rejects, drops) Work with Network and Infrastructure teams on VPNs and cross-connects Support migration of legacy trading systems Required Experience 3–5 years in FIX Connectivity, Integration, or Trading Production Support Strong FIX Protocol knowledge (session & application layers) Linux/Unix experience with ...

sessions (sequence gaps, rejects, drops) Work with Network and Infrastructure teams on VPNs and cross-connects Support migration of legacy trading systems Required Experience 3–5 years in FIX Connectivity, Integration, or Trading Production Support Strong FIX Protocol knowledge (session & application layers) Linux/Unix experience with ...

space, withing a genuinely AI first prod enviornment? My client is creating the first open-source “Thin Ledger” to replace legacy core systems with a modern, event-driven platform powered by Golang, Kafka and multi-region Databases. They are now seeking a Lead Platform Engineer … mission-critical operating environment, ensuring resilience, security, and compliance at scale. Required Skills: • Deep experience with multi-region Kubernetes infrastructure • Event Streaming (Kafka) • Distributed Systems (CockroachDB, YugabyteDB, Redis) • GitOps (ArgoCD, Flux) • IaC (Terraform) • Public Cloud (AWS, Azure, GCP) • Strong SRE mindset (SLOs, SLIs, error budgets) In return they would ...