276 to 300 of 348 Legacy Systems Jobs in London

Senior Specialist/Engineer Service Operations

Hiring Organisation
SITA - Société Internationale de Télécommunications
Location
London, United Kingdom
Salary
£ 80 K
technologies and making a tangible difference every day, we'd like to hear from you.ABOUT THE ROLEAs a Senior Specialist – Mission Critical Radio & Cellular Systems, you will provide technical leadership for the operational support, maintenance and continual improvement of Heathrow Airport's critical communications infrastructure.Working across a diverse technology … estate spanning legacy and modern radio systems, RF over Fibre Distributed Antenna Systems (DAS), public and private cellular infrastructure and IP-based communications platforms, you'll lead the resolution of complex technical issues while helping shape the future direction of operational communications at Heathrow.This role combines ...

Backend Tech Lead — Product Infrastructure

Location
Greater London, England, United Kingdom
PostgreSQL), including query optimization, index tuning, high-concurrency performance tuning and data modelling. Hands-on experience with Kubernetes management, deployment, and container orchestration. Cloud & Systems Infrastructure: Solid understanding of cloud computing concepts with hands-on experience in AWS. Communication & Collaboration: Outstanding communication skills with a proven ability to bridge … complex technical execution with non-technical business stakeholders. Desirable Experience architecting or migrating legacy batch systems to real-time streaming data pipelines. Foundational knowledge or practical experience integrating Artificial Intelligence/Machine Learning models into production data workflows. Corsearch is an equal opportunity and inclusive employer ...

Senior Controls Engineer, OT Fleet Management

Hiring Organisation
Equinix
Location
London, United Kingdom
Salary
£ 80 K
Senior Controls Engineer, OT Fleet Management, is a regional technical leader responsible for advancing the security, reliability, supportability, and lifecycle health of operational technology systems across the data center fleet. The role combines deep industrial controls expertise with strong OT network, server, virtualization, database, and cybersecurity knowledge to lead … execution of the Controls Engineering TVM program, from technical assessment and prioritization through remediation, validation, evidence capture, and closureAssess vulnerabilities, obsolete components, unsupported operating systems, database dependencies, network exposures, and platform lifecycle risks affecting BMS, SCADA, PLC, historian, gateway, and related OT environmentsDevelop practical remediation strategies that balance cybersecurity ...

Senior Developer - Risk Technology

Location
Greater London, England, United Kingdom
data needed to produce the firm’s risk. The majority of development is done in Python. The ideal candidate brings deep knowledge of distributed systems and data structures, and can optimize for performance, reliability, and cost. Primary Responsibilities Design, implement, and support scalable Python‐based risk engines leveraging position … computation using strong data structures and algorithms. Reconcile risk results produced by the new Orchestration platform with metrics from legacy internal risk systems to identify and correct trade breaks. Investigate pricing and risk issues reported by risk management. Collaborate with other internal IT teams to ensure ...

Pro*C programmer

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
looking for a Pro*C programmers to join a long term programme for one of key clients. Our clients Legacy Bespoke Prize Draw System to enable it to be developed to expand the number of Prizes it can process. You will working as part of a Project team ...

Salesforce Project Manager

Location
Greater London, England, United Kingdom
leading Salesforce customers in the ecosystem. They are currently undergoing a major Digital Transformation, to move away from all legacy systems and provide a single source of truth for end users. They are seeking a Project Manager to take ownership of the Salesforce project delivery, manage Salesforce ...

Enterprise Account Executive, DACH (German Speaking)

Location
Greater London, England, United Kingdom
needs Competitive location-based salary and stock options program Who we are Sanity.io is a modern, flexible content operating system that replaces rigid legacy content management systems. One of our big differentiators is treating content as data so that it can be stored in a single source ...

SAP ABAP (RAP)

Location
Greater London, England, United Kingdom
Fiori-ready applications and OData services using the ABAP RESTful Application Programming Model (RAP). Your responsibilities: Transform traditional ABAP programs in legacy SAP system into S/4 HANA architecture. Design and implement CDS and AMDP based on business requirement. Adobe forms development in S/ ...

Senior Controls Engineer, OT Fleet Management

Location
Greater London, England, United Kingdom
Senior Controls Engineer, OT Fleet Management, is a regional technical leader responsible for advancing the security, reliability, supportability, and lifecycle health of operational technology systems across the data center fleet. The role combines deep industrial controls expertise with strong OT network, server, virtualization, database, and cybersecurity knowledge to lead … Controls Engineering TVM program, from technical assessment and prioritization through remediation, validation, evidence capture, and closure Assess vulnerabilities, obsolete components, unsupported operating systems, database dependencies, network exposures, and platform lifecycle risks affecting BMS, SCADA, PLC, historian, gateway, and related OT environments Develop practical remediation strategies that balance cybersecurity risk ...

C# Backend Developer – Hedge Fund

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 100 K
tools and applications as well as improving and supporting the existing environment.One of the major projects you’ll be working on is porting existing systems to C# and modernising adjacent systems and applications. This would be a great opportunity for a senior developer looking for a role with … have an input on design and architecture decisions.One of the second major projects you will be working on is porting legacy VB6 systems to C# and modernising in-house systems and applications, in addition to developing new tools and supporting the existing environment.C# Software Engineers Must ...

C# Backend Developer - Hedge Fund

Hiring Organisation
Quant Capital
Location
London, UK
Employment Type
Full-time
applications as well as improving and supporting the existing environment. One of the major projects you'll be working on is porting existing systems to C# and modernising adjacent systems and applications. This would be a great opportunity for a senior developer looking for a role with … input on design and architecture decisions. One of the second major projects you will be working on is porting legacy VB6 systems to C# and modernising in-house systems and applications, in addition to developing new tools and supporting the existing environment. C# Software Engineers Must ...

Senior Software Engineer

Location
Greater London, England, United Kingdom
Advanced Research and Invention Agency (ARIA). About the role Meridial is seeking an entrepreneurial Software Engineer to take ownership of the software systems at the heart of our multi-photon microscopy platform. This is a broad hands‐on role spanning hardware control, data acquisition, user interfaces, and analysis … evolve real-time and offline image‐analysis pipelines supporting the full experimental workflow Work with the team to translate scientific requirements into robust software systems Contribute to longer-term architectural evolution — modularising the stack, defining APIs, and evaluating migration pathways toward more scalable and maintainable systems Required Qualifications ...

Technical Business Analyst

Hiring Organisation
Primus Connect
Location
City of London, London, United Kingdom
areas including policy, claims, reinsurance and other core insurance domains. The programme is working across a complex estate of approximately 25 source systems. These systems vary significantly in structure, terminology, documentation and data quality. The architecture follows a broadly Medallion-style approach, with data moving from legacy source systems through raw/bronze layers and into a standardised, conformed enterprise model. The programme initially operated with a single delivery squad while the architecture, data model and ways of working were established. It is now moving into a scale phase, growing to multiple parallel delivery ...

Lead Product Manager - Contract

Location
Greater London, England, United Kingdom
Experience delivering workflow, project management, operations or back-office SaaS solutions. Proven experience leading greenfield product development, platform transformation or the replacement of legacy systems. Experience working across multiple product squads, delivery teams or interconnected workstreams. A track record of delivering measurable customer, operational or commercial outcomes … complex stakeholder groups. Experience operating effectively in a large, global organisation with formal governance and complex decision-making processes. Strong understanding of commerce eco- systems and online Customer Experience , preferably including agency operating models, workflows and client-service environments. Strong understanding of Agile, Lean and modern product management practices ...

Data Engineer

Location
City Of London, England, United Kingdom
Data Engineer, you'll play a pivotal role in designing and implementing robust data pipelines, supporting the migration from legacy Azure systems to Databricks, and working closely with stakeholders to deliver tailored data solutions. This role combines hands-on development with collaborative architecture design, and offers ...

Lead Mission Software Engineer, Connected Warfare

Hiring Organisation
Anduril Industries
Location
London, United Kingdom
Salary
£ 80 K
bringing the expertise, technology, and business model of the 21st century’s most innovative companies to the defense industry, Anduril is changing how military systems are designed, built and sold. Anduril’s family of systems is powered by Lattice OS, an AI-powered operating system that turns thousands … networking technology to the military in months, not years.Since 2023, Anduril UK has experienced rapid growth, introducing world-leading software-first, hardware-enabled systems to the UK Ministry of Defence and other government agencies. Our exemplar programme of Maritime Sentry Towers (MST), has been developed and delivered in close ...

Chief Solutions Architect

Location
Ealing, England, United Kingdom
looking for a Chief Solutions Architect to take the lead in designing robust, scalable, and future‐ready systems for our clients. You will play a key role in shaping technical direction, influencing stakeholders, and ensuring delivery excellence across projects. This role is ideal for someone who enjoys solving complex … automation architecture, agent‐based workflow design, and secure integration of AI services into enterprise systems. 5–7+ years’ experience in software engineering, systems design, or architecture roles. Strong experience designing distributed and scalable enterprise systems. Deep knowledge of cloud platforms (AWS, Azure, GCP) and modern architecture patterns. Strong understanding ...

Genomics Programme Manager

Hiring Organisation
SYNLAB UK & Ireland
Location
London, England, United Kingdom
delivery of the enterprise Genomics LIMS, overseeing Epic Beaker and Projodis configuration, system integration, data migration, testing, validation, cutover, implementation and decommissioning of legacy systems. Oversee establishment of the Whole Genome Sequencing service, including laboratory construction and fit-out, equipment implementation, operational modelling, pathway development and validation … England Genomic Medicine Service requirements, UK GDPR, DSPT and applicable information-governance obligations. Own benefits realisation, organisational change and operational readiness, ensuring new systems, facilities and services are adopted successfully, deliver measurable improvements and transition into sustainable business-as-usual ownership. Essential Criteria required for the role: Degree-level ...

Vice President, Head of Messaging & Collaboration

Hiring Organisation
MUFG
Location
London, United Kingdom
Salary
£ 120 K
secure, scalable messaging and collaboration solutions.Establish and maintain standards for configuration, automation, documentation, and testing.Drive product lifecycle management including upgrades, patching, and decommissioning legacy systems.Partner with PMO and internal stakeholders to deliver projects efficiently and align with business priorities.Service Ownership & Operational ExcellenceOwn the end-to-end delivery … Leadership, Architecture, Cyber Security and Business stakeholders.Experience delivering organisational change and technology adoption programmes.DesirableExperience implementing Microsoft Copilot or AI-enabled productivity technologies.Experience migrating legacy messaging platforms to Microsoft 365.Experience with enterprise compliance, eDiscovery and information governance solutions.Experience supporting global service delivery across multiple regions.SKILLS AND EXPERIENCEEssentialExpert knowledge ...

Principal Forward Deployed Engineer - UK

Location
Greater London, England, United Kingdom
Platform built for the enterprise. Global organizations trust OutSystems to rapidly build mission-critical apps and agents, modernize legacy processes with agentic systems, and govern their entire AI portfolio across complex regulatory environments, all on one unified platform. As the future becomes agentic, our customers need … Platform built for the enterprise. Global organizations trust OutSystems to rapidly build mission-critical apps and agents, modernize legacy processes with agentic systems, and govern their entire AI portfolio across complex regulatory environments, all on one unified platform. We are looking for passionate, talented, and motivated people ...

Pre-Sales & Delivery Architect

Location
Greater London, England, United Kingdom
Mindset Agility: Ability to seamlessly pivot between rapid, commercially driven pre-sales discussions and deep, disciplined project delivery execution.Consultative & Challenger Approach: Comfortable challenging legacy architectural thinking and guiding clients toward scalable, AI-native patterns.Commercial Awareness: Mindful of time-to-value (TTFV), project margins, and scope boundaries during both … Platform built for the enterprise. Global organizations trust OutSystems to rapidly build mission-critical apps and agents, modernize legacy processes with agentic systems, and govern their entire AI portfolio across complex regulatory environments, all on one unified platform.As the future becomes agentic, our customers need ...

Data Lead – Fabric, DWH, ETL/ELT, Operations

Hiring Organisation
Bangura Solutions
Location
London, United Kingdom
Salary
£ 80 K
solutions experience - including Power BI Desktop and Power BI Service.As an operational Data leader, you will have strong experience in supporting 24x7 mission-critical systems with a strong focus on uptime, stability, and service excellence. You will have solid hands-on database design experience with schema development, logical … will act as the Lead supporting enterprise global finance system implementations. Migrating and integrating the legacy finance system into multiple finance systems for the organisation, whereby you will support and be a sponsor for the migration and integration activities into Microsoft Fabric. The ideal Data Leader will ...

BI Lead Engineer – Fabric, Power BI, SSIS, SSRS, Operations

Hiring Organisation
Bangura Solutions
Location
London, United Kingdom
Salary
£ 120 K
experience - including Power BI Desktop and Power BI Service.As an operational Business Intelligence Leader, you will have strong experience in supporting 24x7 mission-critical systems with a strong focus on uptime, stability, and service excellence. You will have solid hands-on database design experience with schema development, logical … will act as the Lead supporting enterprise global finance system implementations. Migrating and integrating the legacy finance system into multiple finance systems for the organisation, whereby you will support and be a sponsor for the migration and integration activities into Microsoft Fabric. The ideal BI Lead Engineer ...

Head of AI Solutions, COO Technology - MD (C16)

Location
Greater London, England, United Kingdom
Technology portfolio; translate business intent into a concrete, milestone‐driven execution roadmap with measurable outcomes Develop architecture blueprints and end‐to‐end systems design for Generative AI and agentic workflows across diverse operational domains Build the shared AI platform — reusable models, tooling, guardrails, evaluation frameworks, and accelerators — that reduces … prompt engineering, retrieval‐augmented generation (RAG), vector database design, and evaluation methodologies. You understand how models behave in production, not just in demos. Agentic Systems Design: Proven experience designing and deploying multi‐agent architectures and orchestration frameworks (e.g., LangGraph, AutoGen, CrewAI); tool‐use patterns, human‐in‐the‐loop workflows ...