City of London, London, United Kingdom Hybrid / WFH Options
REC SOLUTIONS LIMITED
openness, and excellence. My client work in a collaborative style and take collective responsibility for successes and our failures. We value: High personal integrity Innovative thinking Efficient and reliable performance Spark You will join a supportive team, where we aim to recruit the best people from all walks of life and diverse business backgrounds. If these sentiments align with … the day-to-day operations of the Linux infrastructure team, including both senior-level system administrators and the Linux support desk staff. This role ensures the stability, security, and performance of mission-critical Linux-based systems including multiple exchanges as well as providing strategic direction, operational excellence, effective team leadership and close collaboration with other departments Responsibilities and Duties … initiatives. Assist with planning, management and resource allocation of inter-departmental projects alongside the PM team. Oversee incident management, root cause analysis, and rapid resolution of system outages or performance degradation. Ensure compliance of procedures such as change management, patch management and security and audit processes. Assist in the maintenance of these procedures. Support regular security audits and penetration More ❯
includes assisting with IT project implementation, performing high-level system administration on various environments, managing incidents and problems to improve system reliability, creating technical documentation, ensuring cybersecurity, monitoring system performance, planning for capacity, and communicating effectively with both customers and internal teams. This individual will also act as a role model for junior team members. Key Tasks & Responsibilities Include … intrusion detection systems Conduct regular security audits and vulnerability assessments Work within the parameters of ISO 27001, taking guidance from the compliance team as needed System Monitoring Monitor system performance and identify areas for improvement Implement performancetuning and optimisation techniques to ensure optimal system operation Capacity Planning Analyse system capacity and plan for future growth and More ❯
DNS servers Configure and troubleshoot HTTP/SSL/TLS based issues Troubleshoot ACL/NAT issue on ASAs Create router/switches templates for network standardization Monitors system performance and implements performancetuning Use of Linux network troubleshooting tools to solve complex network issues (tcpdump, ssldump, curl, wget, mtr, tcp traceroute, nmap, openssl, tshark) Develop bash … support Basic Qualifications: Shall have ten (10) years of experience in the planning, design, development, implementation and technical support of multi-platform, multi-system networks to encompass diagnosing network performance shortcomings and designing and implementing performance improvements. Preferred Qualifications: Ten (10) years of experience designing and implementing network solutions for complex, high performance systems composed of UNIX More ❯
GSEC, SSCP, CySA+ Must have experience administering Red Hat Linux based systems Must have scripting experience Qualifications We Prefer: Experience with patching, creating/maintaining RPM package Experience with performancetuning, networking, user management (LDAP), and security hardening Administer, maintain and troubleshoot Atlassian products (Jira, Confluence, BitBucket) Experience with Jenkins automation Configuration of Scanning tools Nessus/McAfee More ❯
fantastic career and development opportunities within a rapidly growing, innovative Groupwhere all profits go to charity and good causes. What you'll be doing Achieve individual objectives and key performance indicators and maintain own technical competence with in-depth knowledge sufficient to fulfil the role Continually expand knowledge of SQL Server and its related tools Create and modify DWH … objects, such as tables and views; Develop, and maintain, ETL processes to update the data within the DWH Performancetuning of the DWH, such as indexing, for both the updating and consumption of data within it Monitor automated tasks failed on the SQL Server estate, and review or escalate within the team as necessary What you'll need More ❯
engineer onsite with a team of skilled Software Engineers developing Satellite Ground Stations Software. RESPONSIBILITIES Perform software development of large-scale database solutions. Troubleshoot and fix complex software problems. Performancetuning of database objects and queries. Installation, patching, and upgrades of Oracle Database Software. REQUIREMENTS Typically requires a bachelor's degree and minimum 2 years' relevant or equivalent More ❯
Core Network Engineer Job Description: The position is involved with full life-cycle maintenance of a network infrastructure which includes incident response, capacity planning, testing, monitoring, performancetuning, enhancements, and integration of new services. The engineer must have the understanding and ability to implement and troubleshoot Cisco, Juniper, and F5 products and services in a production environment using More ❯
Birmingham, Staffordshire, United Kingdom Hybrid / WFH Options
Counter Terrorism Policing
teams to assist in delivering patch/release of applications while coordinating vendor support. Maintaining middleware such as; IIS, MS-SQL Server, Active Directory, ASP and. NET, including troubleshooting, performancetuning, basic querying and resolving bottlenecks. Daily support of COTS and WEB based software applications with an emphasis on the ability to problem solve. Strong customer focus - understanding More ❯
SSCP, CySA+, CND Must have experience administering Red Hat Linux based systems Must have scripting experience Qualifications We Prefer Experience with patching, creating/maintaining RPM packages Experience with performancetuning, networking, user management (LDAP), and security hardening Administer, maintain, and troubleshoot Atlassian products (Jira, Confluence, Bitbucket) Experience with Jenkins automation Configuration of Scanning tools Nessus/McAfee More ❯
enterprise APIs and commercial experience with: SQL and NoSQL databases Containerisation Working in a continuous delivery environment Distributed and horizontally scalable systems Observability and monitoring tools Triaging production issues Performancetuning of JVM apps Nice to have Not vital, but you'll have the edge if you also have experience with: Kotlin Prometheus Query Language (PromQL) Grafana Prometheus More ❯
Annapolis Junction, Maryland, United States Hybrid / WFH Options
GTSC Talent Solutions
Tools Management Specialist System Engineer to support our customer in the Annapolis Junction, MD area. You will be involved in service monitoring and Management, continuously monitoring the availability and performance of Splunk, SCCM, Micro Focus, and 1E. You will manage and execute patching activities across the enterprise. You will work with performance analytics to aid you in … making recommendations for performance improvements and security enhancements. You will play a key role in issue remediation, and security compliance. You will also document your work and prepare and present reports to management. Mission: As a System Engineer on this government program, you will be supporting important systems to support efforts to keep our country safe. Requirements: U.S. Citizenship … cloud security principles and best practices Excellent communication skills, both verbal and written, with the ability to explain technical concepts to non-technical stakeholders. Experience with monitoring tools and performance tuning. Familiarity with security compliance standards and best practices. Patch Management experience. Good Problem Solving and Critical Thinking Skills Desired Requirements Experience with scripting and automation (e.g., PowerShell) Mission More ❯
and devices. • Support network and computing infrastructure. • Provides list of mail servers which accept Emails for each domain name. • Documents network problems and resolution for future reference. • Monitor system performance and assist in implementing performance tuning. • Requires a thorough knowledge of networking essentials. • Assists in providing support for network security. • Prepares and schedules computer setup, repair, configuration changes … or replacement. • Provides telephone, e-mail, remote access, or in-person solutions to day-to-day DNS issues. • Support IS team in meeting key performance indicators and metrics. • Assist with the maintenance of records for hardware and software use along with license usage. • Displays continuous improvement of current processes and procedures. • Develops strategies and processes to ensure on-time … delivery of equipment, cost reduction opportunities and performance improvements. • Demonstrates good working knowledge of desktop and laptop hardware, and common business software such as MS Office • Maintain up-to-date knowledge of current operating systems. • Understands the role of IS in a manufacturing environment. Additional Skills & Qualifications Certifications: Security + CE and one of the following. Must obtain before More ❯
Gillingham, Kent, United Kingdom Hybrid / WFH Options
Proactive.IT Appointments Limited
Engineer to join our clients IT team in Gillingham on a hybrid basis. You'll play a key role in maintaining and evolving their infrastructure, ensuring stability, security, and performance across their systems. Key Responsibilities Support and manage infrastructure solutions in a hybrid environment (on-premise and cloud). Monitor, troubleshoot, and maintain systems and applications to ensure operational … procedures and contribute to the continuous improvement of internal processes. Key Technical Skills/Experience Required Active Directory - GPOs, authentication protocols, domain controller support. VMWare - ESXi, vCenter, troubleshooting and performance tuning. VEEAM Backup - Configuration, support and recovery processes. SolarWinds - Monitoring and alerting systems. Core Network Services - DNS, DHCP, domain controller management. Windows Server - In-depth knowledge of Server and More ❯
Gillingham, Kent, England, United Kingdom Hybrid / WFH Options
Proactive Appointments
Engineer to join our clients IT team in Gillingham on a hybrid basis. You’ll play a key role in maintaining and evolving their infrastructure, ensuring stability, security, and performance across their systems. Key Responsibilities Support and manage infrastructure solutions in a hybrid environment (on-premise and cloud). Monitor, troubleshoot, and maintain systems and applications to ensure operational … procedures and contribute to the continuous improvement of internal processes. Key Technical Skills/Experience Required Active Directory – GPOs, authentication protocols, domain controller support. VMWare – ESXi, vCenter, troubleshooting and performance tuning. VEEAM Backup – Configuration, support and recovery processes. SolarWinds – Monitoring and alerting systems. Core Network Services – DNS, DHCP, domain controller management. Windows Server – In-depth knowledge of Server More ❯
optimise their backend services. This is a hands-on role with scope to take ownership across the full software lifecycle; from design and development to testing, deployment, and ongoing performance tuning. You’ll be working as part of a cross-functional team alongside product managers, designers, and engineers across the stack. The engineering culture is pragmatic, fast-paced, and … using NestJS and TypeScript Collaborate with product and design teams to define and implement technical solutions Write clean, efficient, and reusable code to support long-term platform evolution Optimise performance and ensure reliability of backend systems Contribute to testing, CI/CD workflows, and release processes Stay current with modern backend practices and bring ideas to the table Annual More ❯
them into effective ERP solutions Configuring ERP platforms (SAP, Oracle, Dynamics, NetSuite, etc.), managing integrations and customisations Supporting data migration, user training, and documentation Providing post-implementation troubleshooting and performance tuning. We’re Looking for Someone With: Demonstrable ERP implementation experience within consultancy or in-house roles Hands-on expertise across finance, supply chain, or manufacturing modules Excellent stakeholder More ❯
SQL Database Specialist (Performance & Optimization Focus) Were looking for a SQL expert to take ownership of our clients database performance and reliability. This role is all about ensuring our SQL environments run at peak efficiency through proactive maintenance, performancetuning, and enforcing best practices across the business. What Youll Be Doing: Monitoring and improving SQL Server … performance and reliability Designing and maintaining automated maintenance plans Troubleshooting query bottlenecks and tuning indexes Advising on data architecture, scalability, and storage strategies Working closely with development teams to build efficient, optimised systems What Youll Bring: Strong experience with SQL Server performancetuning and optimisation Deep understanding of indexes, execution plans, and query strategies Experience maintaining … role where your expertise will directly shape how we manage and scale our data. Benefits Healthcare 3 days onsite - 2 days remote Interested? Please Click Apply NowSQL Database Specialist (Performance & Optimization Focus More ❯
SQL Database Specialist (Performance & Optimization Focus) We’re looking for a SQL expert to take ownership of our clients database performance and reliability. This role is all about ensuring our SQL environments run at peak efficiency — through proactive maintenance, performancetuning, and enforcing best practices across the business. What You’ll Be Doing: Monitoring and improving … SQL Server performance and reliability Designing and maintaining automated maintenance plans Troubleshooting query bottlenecks and tuning indexes Advising on data architecture, scalability, and storage strategies Working closely with development teams to build efficient, optimised systems What You’ll Bring: Strong experience with SQL Server performancetuning and optimisation Deep understanding of indexes, execution plans, and query … where your expertise will directly shape how we manage and scale our data. Benefits Healthcare 3 days onsite - 2 days remote Interested? Please Click Apply Now SQL Database Specialist (Performance & Optimization Focus More ❯
an Elastic Developer for a Department of Homeland Security mission. RESPONSIBILITIES Design, develop, and implement scalable and efficient solutions using the Elastic Stack Configure and optimize Elasticsearch clusters for performance and reliability Develop custom Logstash configurations for data ingestion, processing, and enrichment Create compelling visualizations and dashboards using Kibana to provide insights into data Integrate Beats for lightweight data … to send data to Elasticsearch Collaborate with cross-functional teams to understand requirements and deliver solutions that meet business needs Monitor and troubleshoot Elastic Stack deployments to ensure optimal performance and availability REQUIRED QUALIFICATIONS Proficiency in Elasticsearch, including data indexing, search queries, mappings, and aggregations Strong experience with Logstash configuration for data processing and transformation Familiarity with Kibana for … data visualization, dashboard creation, and log analysis Experience with Elasticsearch cluster management, performancetuning, and scalability Solid understanding of Elasticsearch security features and best practices Proficient in scripting languages such as Python, Ruby, or Shell scripting Experience with version control systems such as Git More ❯
now scaling our operations in London. Our work environment rewards innovation, speed, and bold thinking. The role We’re hiring Senior and Staff Software Engineers to build the high-performance computing infrastructure that powers our Optical Tensor Processing Units (OTPUs). This isn’t just about scaling models—it’s about rethinking how AI workloads are executed at speed … hardware and ML teams to optimise every layer of the stack—from model representation and execution to data movement and scheduling. Whether it’s through compiler techniques, systems-level tuning, or custom runtime design, you’ll play a critical role in shaping the performance layer of our AI platform. This is a role for engineers who think in … just model accuracy. If you’ve worked in HFT, large-scale scientific compute, or AI infrastructure at serious scale, we’d love to talk. Responsibilities Design and build high-performance systems for running AI/ML workloads across distributed compute clusters Optimise for ultra-low latency and real-time inference at scale—profiling, tuning, and rewriting critical systems More ❯
You will be responsible for maintaining a stable, secure, and highly available DB2 environment within a large-scale SysPlex setup . This includes performing upgrades, supporting disaster recovery, and tuning for performance. Key Responsibilities: Install, upgrade, and customise DB2 and related mainframe tooling Perform diagnostics, root cause analysis, and issue resolution Support disaster recovery, performancetuning , and … Skills: 7+ years of DB2 systems programming in a mainframe environment Experience in large data sharing SysPlex setups Strong troubleshooting across both infrastructure and DB2 layers Proven capability in performancetuning , monitoring, and system stability Desirable Skills: Experience with IDAA , CDC Replication , or DB2 replication tooling Exposure to 24/7 banking production environments Familiarity with parallel Sysplex More ❯
Required: Extensive experience of React, including performancetuning Extensive experience of TypeScript, as well as modern JavaScript features Extensive experience developing mobile apps and websites using React Native and Expo Extensive experience debugging native app builds for native platforms: iOS (Xcode) and Android (Gradle) Deep understanding of native app and web security models, i.e. token storage, biometric encryption … tokens and shared components Frontend integration using Azure B2C or a similar OAuth IDP Unit testing Nice to have: C# .Net API development Backend app debugging via App Insights Performance testing using JMeter Writing and maintaining Azure DevOps pipeline scripts" Start Immediately Hybrid - 2-3 days onsite if in Ireland Remote works if other location More ❯
architecting and re-platforming existing systems. This is a fantastic opportunity to gain exposure to the latest cloud and distributed caching technologies whilst playing a pivotal role in continued performance of the team. Key requirements: Excellent core Java skills Strong multi-threading (Locks, concurrency, immutability) and knowledge of the JVM Ideally candidates would have worked within a Front Office … environment previously Business knowledge around Fixed Income products would be advantageous Knowledge of AWS is a plus Experience with performancetuning and working on low latency e-trading systems is a huge advantage Knowledge of messaging systems (MQ, Solace) is preferred Someone who has worked on greenfield systems before is advantageous Excellent communications skills This is a great More ❯
backup and recovery, basic software management, security management, and library management; installation and configuration of hardware, operating systems, and COTS software; managing computer systems in various environments; and sizing, performancetuning, hardware/software/network troubleshooting, and resource allocation. • Experience with different network protocols and firewalls, along with knowledge of computing and networking vulnerabilities, attack methods, and More ❯
and technology. A typical day in this role involves collaborating with technology leaders, contributing to the enhancement of day-to-day operations, and ensuring improvements in availability, reliability, latency, performance, and efficiency of the ESC. You will be required to occasionally participate in "on-call" rotations to resolve incidents occurring out-of-hours. The overarching goal is to deliver … operational procedures (SOPs). Proficient driving operational best practices. Proficient scripting processes in a language such as Bash, Python, or Ruby. Proficient troubleshooting and anticipating problems that affect the performance, reliability, or availability of software systems. PREFERRED QUALIFICATIONS Experience working cross-organizationally and leading strategic team efforts requiring work from multiple team members. Experience actively mentoring junior engineers. Experience … performancetuning software applications and optimizing fleet utilization. Experience with Infrastructure as Code, (such as CDK, CloudFormation, Puppet, Chef, Ansible, or similar). Amazon is an equal opportunities employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We value your passion to discover More ❯