1 to 25 of 26 High Availability Jobs in London

CONTRACTOR MUST BE DV CLEARED (active) Role Title: SQL Server Architect - Cloud Resilience & High Availability (AWS Focus) Location: London, Hybrid - 3 to 4 days onsite x week Duration: 03/03/2027 - likely to be extended MUST BE PAYE THROUGH UMBRELLA Description: Our client previously delivered … large scale, on premises deployment of SharePoint for Hydrogen in 2017. This implementation was designed for high availability, incorporating full disaster recovery and resilience across the application, SQL Server, and storage layers. The client is now looking to transition to SharePoint Subscription Edition and re-platform the solution ...

WebLogic, Oracle HTTP Server (OHS), Forms, Reports, Concurrent Managers, and Workflow. Oversee context file management, AutoConfig maintenance, and system integration points. 2. Database Administration & High Availability Configure, maintain, and tune high-availability Oracle Databases supporting EBS (including Oracle RAC). Execute database cloning, upgrades, patching ...

virtualisation, backup, networking, monitoring, and security. The successful candidate will act as a senior technical escalation point, lead technical discovery and solution delivery, maintain high-quality documentation, and drive service reliability and continuous improvement. Due to the nature of the customer environments supported, candidates must be eligible to obtain … monitoring, and cloud-related incidents and service requests. Support, administer, troubleshoot, and improve Microsoft Exchange Server, hybrid Exchange, Exchange Online, migrations, mail flow, security, availability, and disaster recovery. Support and optimise Citrix environments, including Virtual Apps and Desktops, StoreFront, Delivery Controllers, Citrix Gateway or ADC, profile management, application delivery ...

this role, you will act as the technical authority across compute, storage, networking, automation, and virtualization platforms. You will be responsible for translating high-level business objectives into resilient, secure, and scalable technical solutions, ensuring all architectural blueprints comply with rigorous government security frameworks and long-term IT roadmaps. … design governance, operational delivery, and team mentorship. Key Responsibilities Architectural Governance & Technical Authority: Lead the end-to-end authoring, validation, and review of robust High-Level Designs (HLDs) and Low-Level Designs (LLDs) for high-stakes, mission-critical services. Requirements Translation: Bridge the gap between non-technical stakeholders ...

Oracle Apps DBA to manage, maintain, and optimise mission-critical Oracle E-Business Suite (EBS R12) environments and underlying databases. In this hands-on, high-impact technical role, you will take ownership of cross-layer troubleshooting spanning application, database, operating systems, and infrastructure. You will play a key part … maintaining system performance, security, and high availability, while actively contributing to major cloud migration initiatives (OCI/Azure). Key responsibilities EBS & Database Lifecycle: Maintain, update, copy, and refresh core Oracle systems across test, development, and live 24/7 production environments. Core Apps Administration: Manage key system ...

Aurora, Amazon RDS, SC Cleared Role Overview: An urgent contract opportunity has arisen for an SC Cleared PostgreSQL Database Administrator (DBA) to join a high-profile public sector project. This role is fully remote and falls inside IR35 . The Role: You will be responsible for managing, tuning … scaling mission-critical database infrastructure hosted in secure cloud environments. Working closely with engineering and DevOps teams, you will ensure optimal performance, high availability, and strict adherence to government security standards. Core Responsibilities: Design, configure, and manage PostgreSQL, Amazon Aurora, and Amazon RDS instances. Drive database performance tuning ...

looking for an experienced Network Engineering Specialist (4G ESN/Mobile RAN Performance SME) to shape mobile RAN strategy and optimize critical, high-availability networks. Operating in the 4G Emergency Services Network (ESN) domain, you will lead end-to-end performance analysis, troubleshoot complex protocol traces, and drive … Accuver, TEMS/Nemo, Actix, Wireshark, and protocol analysis (SIP, PTT, SRTP, DTLS). Telecom Background: Proven track record as a performance SME in high-availability mobile networks working with 3rd-party suppliers. Randstad Technologies is acting as an Employment Business in relation to this vacancy. ...

Your new role The company previously delivered a large scale, on-premises deployment of SharePoint for Hydrogen in 2017. This implementation was designed for high availability, incorporating full disaster recovery and resilience across the application, SQL Server, and storage layers. The client is now looking to transition … Architect to define PoV success criteria (RPO/RTO, failover time, throughput, recovery steps). * Stand up PoV topology: o SQL Server Always On Availability Groups on Amazon EC2 across multiple AZs. o Storage using EBS (io1/io2/gp3) and, where required, FSx for Windows File Server ...

services using Java and TypeScript . Build and support RESTful APIs and micro services using Express.js and related technologies. Deliver secure, scalable and high-performing software solutions within Defence and Government environments. Work across the full software development life-cycle, from requirements through to deployment and live service support. … technologies including Docker and Kubernetes . Experience working with event-driven architectures and messaging technologies. Familiarity with Infrastructure as Code (IaC) approaches. Experience developing high-availability, mission-critical or operationally critical systems. Understanding of secure cloud environments and cloud-native architectures. Technology Environment Java TypeScript Express.js ...

passionate about building and operating highly scalable database platforms? Have you administered and optimised mission-critical PostgreSQL environments in cloud-first organisations, ensuring performance, availability and resilience at scale? Can you demonstrate broad technical knowledge across Platform Engineering, DevOps and Infrastructure, alongside experience with automation and scripting using Python … Engineering, Platform Engineering, DevOps or Infrastructure roles with a strong focus on database administration. You'll possess deep expertise in PostgreSQL , including performance tuning, high availability, replication and operational support within Azure-based environments. You will have strong Linux systems administration skills, experience with database automation and infrastructure ...

migration of an enterprise-scale SharePoint platform from on-premises infrastructure to AWS. The initial eight-week Proof of Value will assess SQL Server high availability, disaster recovery and performance options, with the potential to progress into a detailed architecture and design phase through … cost-effective platform. Essential Technical Skills 10+ years' Microsoft SQL Server architecture and engineering experience (SQL Server 2016+). Strong experience with Always On Availability Groups, Failover Cluster Instances (FCI) and HA/DR solutions. Experience supporting large-scale SharePoint farms and SQL Server databases. Strong SQL Server performance ...

Developer - Investment Banking - Contract or Perm - London Project description We are seeking an experienced Senior KDB+ Developer to design, develop and optimize high performance data platforms built on kdb+. The ideal candidate will have deep expertise in kdb+ tick architecture, performance tuning at scale and close collaboration with business … systems with strong understanding of data organization, schema design and the performance implications of different architectural approaches. Build and operate solutions handling large scale, high frequency datasets, ensuring low latency, high throughput and efficient memory usage. Analyze and optimize q queries, data models and ingestion pipelines for both ...

management, and preferred work experience in batch processing. As a Senior Java Developer, you will play a crucial role in designing, developing, and maintaining high-performance applications that meet our business needs. Key Responsibilities: Design and Development: Design and development of robust, scalable, and efficient Java applications. AWS Integration … Utilize AWS services to build and deploy cloud-based solutions, ensuring high availability and scalability. Database Management: Design, implement, and maintain database schemas, write complex SQL queries, and optimize database performance. Batch Processing: Develop and manage batch processing systems to handle large volumes of data efficiently. Code Quality ...

management, and preferred work experience in batch processing. As a Senior Java Developer, you will play a crucial role in designing, developing, and maintaining high-performance applications that meet our business needs. Key Responsibilities: Design and Development:Design and development of robust, scalable, and efficient Java applications. AWS Integration … Utilize AWS services to build and deploy cloud-based solutions, ensuring high availability and scalability. Database Management:Design, implement, and maintain database schemas, write complex SQL queries, and optimize database performance. Batch Processing:Develop and manage batch processing systems to handle large volumes of data efficiently. Code Quality ...

management, and preferred work experience in batch processing. As a Senior Java Developer, you will play a crucial role in designing, developing, and maintaining high-performance applications that meet our business needs. Key Responsibilities: Design and Development: Design and development of robust, scalable, and efficient Java applications. AWS Integration … Utilize AWS services to build and deploy cloud-based solutions, ensuring high availability and scalability. Database Management: Design, implement, and maintain database schemas, write complex SQL queries, and optimize database performance. Batch Processing: Develop and manage batch processing systems to handle large volumes of data efficiently. Code Quality ...

Hybrid Permanent - £85K - £100K + Bonus + Full Benefits Financial Services Firm is hiring for an experienced Python Application DevOps Engineer to join a high-performing engineering team supporting critical technology platforms. This is a hands-on role focused on Python automation, production stability, application resilience and continuous improvement … within a complex, high-volume technology environment. You will work across application, infrastructure and engineering teams to improve the reliability, scalability and operational performance of business-critical platforms. Responsibilities: * Develop Python-based automation and tooling to improve operational efficiency. * Support and enhance critical production applications and services. * Drive improvements ...

design, development, and technical troubleshooting with ability to think beyond routine or conventional approaches to build solutions or break down technical problems Develops secure high-quality production code, and reviews and debugs code written by others Identifies opportunities to eliminate or automate remediation of recurring issues to improve overall … experience developing/running large datasets and optimizing query performance. Practical experience scaling and load-balancing of KDB applications. Practical experience building resilient and high-availability KDB applications. Preferred qualifications, capabilities, and skills Experience with market data venue and vendor data platforms. AWS Experience. Experience in Terraform ...

trading platform. The organisation operates a complex global technology estate, with network infrastructure connecting data centres, offices, cloud environments and critical trading services. Network availability, resilience, security and low-latency performance are fundamental to its operations. This is a hands-on senior engineering position offering significant technical ownership across … critical network infrastructure. Strong technical knowledge of enterprise and data centre networking. Hands-on understanding of: BGP, OSPF , Routing and switching Network resilience and high availability Network troubleshooting and incident resolution Ability to manage network changes within highly available production environments. Desirable Experience Experience with AWS networking . ...

tools such as React Query and Tailwind Contribute to infrastructure, system architecture and cloud-native engineering decisions Work on distributed systems, real-time processing, high availability and system performance Collaborate effectively with AI, product and infrastructure teams to deliver reliable features Support API testing and maintain high ...

Server Architect - DV Clearance, Cloud Resilience & High Availability (AWS) £610 per day - Inside IR35 London (Hybrid, 3-4 days onsite per week) 3 months initially with strong likelihood of extension My client is seeking a DV Cleared SQL Server Architect to support a major transformation programme … Server architecture, design, and operational expertise across SQL Server 2016 and later versions. Extensive hands-on experience delivering SQL Server Always On Availability Groups, Failover Cluster Instances (FCI), log shipping, replication, and enterprise HA/DR solutions. Strong background supporting large-scale SharePoint environments, including SharePoint database architecture, performance ...

Bloomberg eTrading/TOMS/eTOMS, ION Anvil or comparable trading platforms. Experience supporting releases, deployments, infrastructure changes and production readiness. Understanding of high-availability and resilient production environments. Candidates will need to show evidence of the above in their CV in order to be considered. ...

Programme with Potential to Run for 3 Years We are seeking an experienced Python & FIX Connectivity Trading Application Production Support Specialist to join a high-performing team supporting global derivatives trading platforms. This role is ideal for candidates with a strong background in Front Office trading application support … highly desirable. Personal Attributes Excellent communication skills with the ability to work effectively with traders, developers, and stakeholders. Comfortable operating in a fast-paced, high-pressure trading environment. Proactive, self-motivated, and solution-oriented. Strong ownership mindset with a focus on operational excellence. Able to manage changing priorities ...

pragmatic remediation roadmaps. Align enterprise security architecture to recognised frameworks and regulatory requirements. Collaborate with enterprise architects, business stakeholders, and cyber teams to balance availability, compliance, and security. Provide architectural guidance across cloud migration and digital transformation programmes. What we're looking for Proven experience securing enterprise IT environments … protocols and technologies such as SAML/OAuth, API security, and associated risks in cloud-native environments. Experience operating in regulated, business-critical, or high-availability enterprise settings. Ability to translate technical risk into clear architectural decisions for engineering and business audiences. We welcome candidates from any industry ...

requires engagement through an umbrella company. PSC engagement is not available. A flavour of what you'll be working on: Developing and maintaining reliable, high-performance embedded software in C/C++. Building software for Embedded Linux and Real-Time Operating Systems (RTOS). Developing multi-threaded applications … that will help you stand out: GUI development using JavaScript, TypeScript, HTML or CSS. Python, Bash or PowerShell scripting. Experience with mission-critical or high-availability systems. Ready to put your C/C++ and Embedded Linux skills to the test? Apply now for this Contract Embedded Software ...

requires engagement through an umbrella company. PSC engagement is not available. A flavour of what you'll be working on: Developing and maintaining reliable, high-performance embedded software in C/C++. Building software for Embedded Linux and Real-Time Operating Systems (RTOS). Developing multi-threaded applications … that will help you stand out: GUI development using JavaScript, TypeScript, HTML or CSS. Python, Bash or PowerShell scripting. Experience with mission-critical or high-availability systems. Ready to put your C/C++ and Embedded Linux skills to the test? Apply now for this Contract Embedded Software ...