1 to 25 of 88 Performance Tuning Jobs in London

i. This is a hands-on role for a genuinely strong RPG/IBMi engineer who can go beyond coding into system-level understanding, performance, and security. You'll be working on a live, business-critical environment, owning development, enhancement, and support of key applications, with real visibility across … business teams on new functionality Troubleshoot and resolve complex production issues using joblogs, journals, and OS-level tooling Evaluate and improve existing applications (performance, structure, maintainability) Contribute to Agile ceremonies (Show & Tell, sprint delivery, etc.) Produce technical documentation and user guidance Support critical systems, including occasional out-of-hours ...

Data Factory and Databricks, replacing legacy SSIS pipelines. Identifying opportunities to harden and automate manual steps within the Finance Close workflow Conduct T-SQL performance tuning across on-prem and cloud environments.Conduct T-SQL performance tuning across on-prem and cloud environments. Collaborate with ...

based in the UK or US and offers the opportunity to build scalable, real-time services using modern technologies. If you’re passionate about performance, have strong Core Java and SpringBoot expertise, and thrive in a collaborative yet opinionated engineering culture, we want to hear from you. Key Responsibilities … DevOps, Product, and QA teams to ensure production-grade solutions. Participate in architectural discussions, advocate for best practices, and provide mentorship to peers. Drive performance tuning, fault tolerance, and observability improvements across services. Required Skills & Experience: 5+ years of experience in Core Java development with a focus ...

business needs. * Support the migration of associated Windows Server estates * Ensure secure, stable and compliant transitions aligned with end of life timelines. * Conduct troubleshooting, performance tuning, and post migration validation work. * Produce clear migration documentation, runbooks, and operational handover materials. * Collaborate with technical leads, infrastructure teams, and wider … later versions (SQL 2022; SQL 2025). * Strong understanding of SQL Server architecture, clustering, HA/DR, AlwaysOn, performance tuning, and security. * Demonstrated ability to analyse large, complex estates and identify hidden/unknown instances. * Experience migrating associated Windows Server platforms (2016/2019). * Ability to work ...

between core systems and the Enterprise Data Warehouse, ensuring accurate and timely reporting Manage and monitor ETL pipelines, identifying and resolving data issues and performance bottlenecks Act as a technical point of contact during financial close periods (monthly, quarterly, year-end) Perform root cause analysis on data issues … cloud-based “Single Source of Truth” data platform Design, develop and maintain ETL workflows using modern tools (e.g. Azure Data Factory, Databricks) Optimise database performance through query tuning, indexing and partitioning strategies Support CI/CD practices using Azure DevOps Produce and maintain technical documentation Provide ...

exposure to the Payments domain to design, build, and enhance applications supporting global payment processing and modernization programs. The role involves developing scalable, high-performance backend components, integration services, and APIs that enable real-time payments, ISO 20022 message transformations, reconciliation, and workflow automation. The ideal candidate will have … internal systems like Core Banking or Treasury. Develop components supporting real-time payments , event-driven processing , and asynchronous messaging (Kafka, JMS) . Ensure code performance, reusability, and compliance with secure coding and resiliency standards. Payments System Modernization Collaborate with architecture and product teams on payments modernization , API enablement ...

pipelines, including ETL/ELT workflows, batch processing, and scheduled data builds. Strong understanding of data modelling, transformations, and downstream data consumption. Experience with performance tuning for backend services or data pipelines. Proficient SQL skills for data analysis, validation, and troubleshooting. Experience working with data warehouses, data lakes … reliable and efficient data processing. Implement scalable and maintainable solutions aligned with architectural standards. Collaborate with data engineers to ensure data accuracy, consistency, and performance across pipelines and services. Participate in code reviews, design discussions, and architectural decision-making. Support CI/CD pipelines, deployments, and production releases. Troubleshoot ...

Monitoring & Observability - Own the Datadog APM setup: tracing, alerting, dashboards, log management - Maintain and tune alert channels integrated with Slack - Reduce alert fatigue by tuning thresholds, suppressing false positives, and downgrading non-actionable errors - Be the first responder when something breaks in production Reliability & Incident Response - Investigate and resolve … production incidents end-to-end: detection, root cause analysis, fix, and post-mortem - Handle database performance issues: slow query identification, index creation, query optimization, connection pool tuning - Manage queue system reliability (BullMQ on Redis): concurrency tuning, rate limiting, stalled job handling, autoscaling - Ensure graceful handling of failovers ...

version control, automated deployment) for Power BI. Strong SQL expertise, including writing complex queries, stored procedures, and CTEs, with experience in query optimization, performance tuning, and designing data models for relational databases. Good understanding of relational databases, data warehousing concepts, and dimensional modelling (Kimball or similar). Experience … continuous learning and staying current with Power BI, Azure, and wider data technology trends. Desirable: Exposure to enterprise-level reporting governance, security, and performance optimisation practices. Familiarity with Azure Data Services such as Azure SQL, Data Factory, Log Analytics, Azure Monitor and Synapse Analytics. Integration with Microsoft tools (SharePoint ...

London, UK (Hybrid) Job Type: Contract - Inside IR35 Role Overview 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 … promoting best practices across the team. Key Responsibilities Design, develop, and maintain kdb+ tick systems, with strong understanding of data organisation, schema design, and 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. ...

part of a team) Architect and optimize ETL/ELT pipelines using services such as: DBT, AWS Glue, Lambda, Kinesis, S3, EMR Design high performance Snowflake data models (3NF, dimensional, Data Vault, etc.) Optimize query performance, clustering, micro-partitioning, and resource consumption Work closely with Data Engineers, Analysts … data and engineering teams Translate business needs into scalable data solutions Key Skills/Knowledge Strong grasp of data modelling, data warehousing concepts and performance optimization techniques Hands on expertise with Snowflake (architecture, performance tuning, security, Snowpipe, streams/tasks) Strong experience with AWS cloud data ecosystem ...

modelling standards including dimensional modelling, star schema, and enterprise data models. Lead architecture reviews and solution design discussions for new data initiatives. Optimize Snowflake performance, workload management, and cost governance. Establish data governance frameworks including access control, data security, and compliance standards. Design and support AI/ML-ready … guest behaviour analysis, booking trends, revenue analytics, and operational reporting. Required Technical Skills Data Platform Strong expertise in Snowflake Deep knowledge of Snowflake architecture, performance tuning, data sharing, security, and workload optimization. Cloud Platform Strong experience with Amazon Web Services, including: S3 IAM AWS Glue Lambda CloudWatch Data ...

large - scale project environment. You will work on advanced RHEL 9 systems, high - end GPU workstations and HPC platforms, contributing to system stability, performance and innovation. The role provides hands - on exposure to cutting - edge technology, performance testing and automation, while collaborating closely with multi - disciplinary teams … Troubleshoot complex Linux system issues using structured diagnostic approaches Support and contribute to large - scale projects through close collaboration with cross - functional teams Conduct performance testing on HPC platforms using custom scripts and tools Analyze performance and utilization data to produce actionable insights Prepare detailed technical reports covering ...

Power BI to augment client decision-making and operational outcomes. Architecture, Governance & Standards Translate business requirements into end-to-end data architecture, balancing performance, cost, security, and maintainability. Apply and advise on security patterns and contribute to governance-by-design. Enforce technical documentation standards, architectural artefacts, and implementation patterns … audiences. Strong relationship-building and stakeholder management in complex client environments. Code Management CI/CD for Fabric items. Git-based workflow. Testing frameworks. Performance tuning patterns. Cost/capacity optimisation. Desirable Skills & Experience Experience across adjacent Microsoft services often paired with Fabric (e.g., Azure Synapse Analytics, Azure ...

Required hard and soft skills, experience: Demonstrable professional engineering experience building SaaS platforms at scale Deep expertise in: Python and Django ; PostgreSQL (Schema design, Performance Tuning, Migration); Celery , Flower , RabbitMQ; AWS services (cloud compute, storage, networking, monitoring); and Linux OS , scripting Proven experience with Stored Procedures, Common Table ...

security standards. Support Provide 2nd and 3rd line support across Dynamics CRM applications. Manage incidents, service requests, and changes following ITIL processes. Monitor CRM performance and proactively resolve operational issues Skills & Experience Required Essential Proven technical expertise in Dynamics 365 CE configuration and customisation. Hands-on with Power Platform … stakeholder management, communication, and problem-solving skills. Desirable Exposure to Copilot and AI-driven tools. ITIL certification or experience working in ITIL environments. xehkeey Performance tuning and data migration expertise. *Rates depend on experience and client requirements ...

security standards. Support Provide 2nd and 3rd line support across Dynamics CRM applications. Manage incidents, service requests, and changes following ITIL processes. Monitor CRM performance and proactively resolve operational issues Skills & Experience Required Essential Proven technical expertise in Dynamics 365 CE configuration and customisation. Hands-on with Power Platform … stakeholder management, communication, and problem-solving skills. Desirable Exposure to Copilot and AI-driven tools . ITIL certification or experience working in ITIL environments. Performance tuning and data migration expertise. *Rates depend on experience and client requirements ...

trusted backend partner for Product and Platform teams. Within 12 months, you will: Confidently own and evolve multiple backend systems. Improve database performance and background job efficiency. Reduce operational risk across TOC integrations. Strengthen CI/CD reliability and deployment confidence. Contribute to longer-term backend architecture improvements … party integrations, ensuring reliable and secure data exchange. Infrastructure Collaboration: Work with the Platform team on AWS-based deployments and CI/CD processes. Performance & Reliability: Optimise background processing and database performance to maintain system stability. Incident Response: Support investigation and resolution of production issues. Cross-Functional Collaboration ...

Jira. * Proven track record of delivering features and projects to deadlines while maintaining high standards of quality and reliability. * Understanding of application and database performance tuning, troubleshooting, and optimization techniques. * Comfortable working in small, collaborative teams and taking initiative in managing development tools, environments, and build processes. * Familiarity … development using HTML5, CSS3, JavaScript, and modern React components to maintain the web applications. * Participate in architectural discussions and propose improvements that enhance system performance, scalability, and maintainability. * Collaborate with Digital Product, Technology, and Marketing teams to define, estimate, and deliver features within sprint timelines. * Participate in code reviews ...

work with stakeholders Additional Desirable Skills Experience with tools such as Ansible, Maven, or Gradle Knowledge of AWS networking and database services Experience with performance tuning and high-availability systems ...

CloudWatch, KMS, and Amazon Linux 2023. DevOps Tools: Terraform, Jenkins, Docker + Groovy pipelines experience. Scripting: Shell, Python, PowerShell, Perl, Java. PostgreSQL admin, performance tuning, HA, replication, backup/DR, Git, Jira, Confluence, ServiceNow. Monitoring tools: Grafana, Prometheus + Alert Manager. Key Tasks: troubleshooting, root cause analysis ...

knowledge of CI/CD, Infrastructure as Code, and automated testing (JUnit, Mockito, integration tests). Experience with SQL and relational databases; understanding of performance tuning and transactionality. Production support experience: monitoring, logging, tracing and incident management. Mindset: self-directed, proactive problem-solver who challenges assumptions rather than ...

Containerisation (Docker) and orchestration (Kubernetes) Knowledge of CI/CD pipelines, Infrastructure as Code, and automated testing (JUnit, Mockito) Experience with SQL, relational databases, performance tuning, and transactionality Production support experience, including monitoring, logging, tracing, and incident management Experience/exposure with Clearbank integrations, Mambu, Moneyhub ISAs - saving ...

Technology Stack : Deep Mastery: Gresham Asset Control (legacy) and Prime EDM. Architecture : Cloud-native migrations (AWS/Azure), API design, and SQL/NoSQL performance tuning. Scripting : Python (preferred) or Java for custom business logic and automation. Pricing Logic : Strong understanding of EOD (End of Day) vs. Real-time ...

Manage virtual machine lifecycle including provisioning, maintenance, migration, and decommissioning Perform OS rebuilds and bare metal provisioning using Rebar Maintain infrastructure stability, availability, and performance Operating Systems Advanced Linux administration including troubleshooting, patching, hardening, and performance tuning Windows Server administration and operational support Perform system upgrades, rebuilds … recovery activities Cloud Support Provide operational support for AWS cloud environments Troubleshoot cloud infrastructure, performance, networking, and access issues Monitor cloud resources and recommend improvements for reliability, security, and cost efficiency Support hybrid infrastructure environments Infrastructure as Code and DevOps Strong experience with Terraform for infrastructure provisioning and updates ...