26 to 50 of 267 Performance Tuning Jobs in London

FX Risk — Lead Java Developer | Vice President

Hiring Organisation
Citigroup
Location
London, UK
decisions shape a strategically critical platform, and your impact is felt across global markets.What You'll DoLead end-to-end delivery of complex, high-performance Java applications supporting FX risk management across global marketsArchitect scalable, low-latency solutions that process real-time risk data at scale — designing for resilience … performance, and security from day oneDrive technical direction and key decisions — from system design and architectural choices to setting engineering standards across the teamTranslate complex business requirements into robust, high-quality code — working closely with quantitative analysts, traders, and business stakeholdersCraft high-quality, scalable software in an agile environment ...

Database Administrator (AWS AURORA / POSTGRESQL)

Hiring Organisation
NSD
Location
South Croydon, London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £525 per day
database platforms hosted within AWS. This is an excellent opportunity to join a highly skilled technical team, working on mission-critical services where resilience, performance and security are paramount. WHAT WILL THE SENIOR DATABASE ADMINISTRATOR BE DOING? As the Senior Database Administrator, you'll act as the technical lead … hosted database platforms, taking ownership of database architecture, resilience, performance optimisation and operational support. You'll work closely with Solution Architects, Cloud Engineers, Developers and Operational teams to design highly available database solutions, optimise performance, implement disaster recovery capabilities and resolve complex production issues. Alongside hands-on technical ...

SQL Developer

Hiring Organisation
Picture More
Location
South East London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£65,000 per annum
sits at the heart of a business-critical software platform. You'll be joining a collaborative engineering team where you'll solve complex database performance issues, improve scalability and reliability, and play a key role in the ongoing development of a mature SQL estate. If you enjoy analysing execution … plans, tuning complex queries and solving challenging SQL performance problems, this is an excellent opportunity. The role Develop, enhance and maintain complex T-SQL stored procedures, functions and queries. Investigate and resolve SQL performance issues using execution plans and performance analysis tools. Optimise queries, indexing strategies ...

Senior Platform Engineer

Hiring Organisation
JP Morgan Chase
Location
London, UK
Senior Platform Engineer at JPMorganChase within Electronic Trading Services Platforms, you will be a hands-on technical leader responsible for designing, building, and tuning the Linux-based compute and infrastructure platforms that power our low-latency electronic trading businesses. This is a deeply technical, engineering-first role: you will … multiply your impact.You will work directly with the Electronic Trading Lines of Business to align technical strategy with business goals, solve complex compute and performance-engineering challenges, and mentor partner technical teams. You will serve as an expert, hands-on advisor to peers, leadership, and stakeholders.Job ResponsibilitiesDesign, build ...

Senior Fullstack Engineer (Python + React.js)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
efficient server‐side applications. The ideal candidate should have experience in microservices architecture, API development, database management, and frontend ensuring high availability and performance of backend and frontend services. A strong focus on Separation of Concerns (SoC), security best practices, and performance optimization is crucial for success … create API endpoints for model interaction (e.g., retrieving predictions). Develop and maintain scalable services, e.g. Microservices utilising REST, gRPC, or GraphQL, ensuring optimal performance and seamless integration. Optimize database queries and schemas to improve performance, scalability, and reliability. Implement security features, including authentication and authorization using industry ...

Application Support Engineer

Hiring Organisation
Bounteous
Location
London, UK
join our Exchange Operations team supporting Nadex, a regulated derivatives trading exchange. You will play a critical role in ensuring the availability, stability, and performance of our production and demo trading environments. This is a hands-on role suited for someone who thrives in a fast-paced, mission-critical … Problem Management — Triage, troubleshoot, and drive resolution of production incidents. Follow defined escalation procedures and contribute to root cause analysis and post-incident reviews.• Performance Tuning — Monitor application and system performance, identify bottlenecks, and implement tuning recommendations to maintain optimal exchange operations.• Change & Release Support — Assist ...

DB2 for z/OS Systems Programmer

Hiring Organisation
NTT
Location
London, UK
supporting a large database estate comprising 50+ DB2 subsystems across multiple mainframe platforms and geographies. This role is critical to ensuring the availability, performance, integrity, maintenance, and security of the organization's DB2 infrastructure.You will work closely with application development, infrastructure, operations, and security teams to maintain highly available … secure DB2 environments while supporting strategic database initiatives, performance optimization, disaster recovery planning, and technology upgrades.The ideal candidate will possess strong technical expertise, excellent troubleshooting capabilities, and the ability to operate independently within a complex enterprise environment.In this role, You willInstall, configure, upgrade, and maintain DB2 for z/ ...

Senior Data Engineer: Data Platform DevOps & Architecture

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
practices Container orchestration (Kubernetes/AKS) experience beneficial Event-driven architectures and API integration patterns Monitoring and alerting with Azure Monitor and Log Analytics Performance tuning and cost optimisation Git version control proficiency Governance, Compliance & Security Strong understanding of information security requirements Experience with Microsoft Purview or similar ...

Neo4j Platform Consultant

Hiring Organisation
NTT DATA
Location
London, UK
graph platforms/database engineering)Role OverviewWe are seeking a Neo4j Platform Engineer to build and manage the Neo4j infrastructure layer, ensuring high availability, performance, and secure access to enterprise knowledge graphs.This role is responsible for cluster configuration, performance tuning, and access control, enabling scalable and reliable … backup, restore, and disaster recovery processesPerformance OptimizationTune and optimize Cypher queries for production workloadsOptimize graph traversal patterns for Graph RAG use casesIdentify and resolve performance bottlenecks in large-scale graph environmentsBenchmarking & ScalabilityDesign and execute query performance benchmarks at scaleMonitor system performance and ensure high throughput ...

Tech Lead - Optimisation Engineering

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
ambiguous problem statements, and define measurable outcomes and acceptance criteria. Collaborate with OR/optimisation experts to integrate solvers (e.g. Gurobi) and ensure model performance, correctness, explainability, and maintainability. Establish strong engineering practices: code review, automated testing, CI/CD, release management, incident response, and post‐incident learning. Build … observability into optimisation services (KPIs, logs, traces) and manage performance tuning (latency, throughput, cost) across environments. Contribute hands‐on when needed (prototyping, critical‐path coding, reviews), while primarily enabling the team to deliver consistently. Required Qualifications Proven experience leading a software engineering team delivering production‐grade systems, with ...

.NET Technical Lead

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
security and code quality. Leverage Azure services (App Services, Functions, Container Apps, SQL, etc.) for cloud‐native application development and deployments. Manage Azure deployments, performance tuning, and basic cloud administration tasks to ensure scalability and reliability. Collaborate with stakeholders and cross‐functional teams to align technical solutions with … lifecycle management. Skilled in Azure SQL Server with deep hands‐on experience in writing complex Stored Procedures, Triggers, and Views, along with strong application performance optimization expertise. Cloud experience in Azure App Services, Azure Functions, Azure Container Apps, and deployments, with exposure to basic cloud administration. Knowledge of microservices ...

Java Developer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
/CD delivery processes and automated deployment pipelines. Produce and maintain technical documentation where required. Troubleshoot production issues and contribute to application stability, performance, and reliability. Contribute to continuous improvement and software engineering best practices. Essential Skills & Experience Proven experience as a Java Developer, Backend Developer, or Full Stack … Kubernetes. Monitoring and observability tooling. Large-scale enterprise application development. Consulting or client‐facing project delivery. Secure coding practices and application security principles. Application performance tuning and optimisation. Working within complex transformation programmes. Key Competencies Java Development Backend Engineering API Development Software Design Agile Delivery Problem Solving Technical ...

Production Engineer

Hiring Organisation
Jobleads-UK
Location
City Of London, England, United Kingdom
ability to lead multiple projects simultaneously, delivering to deadlines Expert-level experience with MSSQL, Oracle and Sybase database environments, including complex query-writing and performance tuning A natural leader who relishes the prospect of supporting an expanding business and driving continuous improvement in support functions Motivated self-starter … scope for growth. And connections act as a catalyst. Sparking richer solutions for our clients to break new ground, modernising markets for future performance, and creating dynamic careers for our people. Our capacity to connect builds trust, supports communities and gives us the power to anticipate and respond ...

Systems Developer - High Performance Trading Infrastructure

Hiring Organisation
Quant Capital
Location
London, UK
SYSTEMS DEVELOPER – High Performance Trading InfrastructureLondon – Hybrid100,000-150,000 + bonusQuant Capital is recruiting on behalf of a leading global quant investment firm seeking a Systems Developer to join its high-impact technology group in London. This role is part of a core engineering team focused on building … maintaining the backbone infrastructure supporting high-performance trading and large-scale research.In this hands-on role, you will gain significant exposure to distributed systems, high-throughput computing, and low-latency infrastructure. You’ll work on complex technical challenges that directly influence the firm’s ability to process data ...

Production Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
ability to lead multiple projects simultaneously, delivering to deadlines* Expert-level experience with MSSQL, Oracle and Sybase database environments, including complex query-writing and performance tuning* A natural leader who relishes the prospect of supporting an expanding business and driving continuous improvement in support functions* Motivated self-starter ...

Systems Integration Advisor

Hiring Organisation
NTT DATA
Location
London, UK
multiple product lifecycle environments, from development to mission-critical production systems.• Configure and maintain database servers and processes, including monitoring of system health and performance, to ensure high levels of performance, availability, and security.• Database performance tuning.• Planning, deploying, maintaining, troubleshooting of high-availability database environments (RAC. … Qualifications• 8+ years on Oracle 12.x/Above versions in database administration, in an enterprise environment with multiple database servers is required. • Experience with Performance Tuning and Optimization (PTO), using native monitoring and troubleshooting tools• Experience with backups, restores and recovery models• Experience with database administration• Experience with ...

AVP Software Developer

Hiring Organisation
Adecco
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
using Python and SQL, ensuring they are efficient and robust.Database Solutions: Build and optimise database solutions, focusing on schema design, indexing strategies, and query performance tuning.ETL/ELT Pipelines: Develop and maintain pipelines for ingesting, transforming, and serving data across systems.Integration: Seamlessly integrate applications with data lakes and lake ...

AVP Software Developer

Hiring Organisation
Adecco
Location
City of London, London, United Kingdom
Employment Type
Contract
Python and SQL, ensuring they are efficient and robust. Database Solutions: Build and optimise database solutions, focusing on schema design, indexing strategies, and query performance tuning. ETL/ELT Pipelines: Develop and maintain pipelines for ingesting, transforming, and serving data across systems. Integration: Seamlessly integrate applications with data lakes ...

AVP Software Developer

Hiring Organisation
Adecco
Location
London, UK
using Python and SQL, ensuring they are efficient and robust.Database Solutions: Build and optimise database solutions, focusing on schema design, indexing strategies, and query performance tuning.ETL/ELT Pipelines: Develop and maintain pipelines for ingesting, transforming, and serving data across systems.Integration: Seamlessly integrate applications with data lakes and lake ...

Site Reliability Engineer

Hiring Organisation
Randstad Digital
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£60,000
activities, identify root causes, and execute plans to permanently resolve them. Architecture Support: Support development and engineering teams in building highly available, scalable solutions. Performance & Capacity: Conduct performance tuning and capacity planning to align perfectly with client business needs. Cloud Migrations: Drive or support implementation teams ...

Lead Data Engineer

Hiring Organisation
JP Morgan Chase
Location
London, UK
direction.Job responsibilitiesDesign scalable, reusable data processing and data quality frameworks using Python, PySpark, and dbtBuild and optimize batch and streaming data pipelines with strong performance, fault tolerance, and observabilityDevelop and operate workflow orchestration (e.g., Apache Airflow) to schedule, monitor, and manage data movement and transformationsModel and transform data … analytics using SQL and dbt to support business intelligence and reporting workloadsWrite production-grade Python/PySpark code with disciplined testing, performance tuning, and maintainable object-oriented designImplement infrastructure-as-code (e.g., Terraform) to provision and manage cloud-based data platform componentsContainerize and deploy services using Docker ...

data engineer for transformation analytics

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Описание McKinsey & Company develops Wave, a SaaS product that helps clients manage improvement programs and transformations by tracking initiative progress, performance, budgets, timelines, and impact on longer-term goals. Its Transformatics team builds data and AI products that provide analytics insights for clients and McKinsey teams involved in transformation … rapid business data access and emerging technology incubation Design and develop scalable, reusable data products for analytics, reporting, and machine learning pipelines Implement query tuning, indexing, partitioning, and caching strategies in platforms such as Snowflake and Databricks Collaborate with data scientists, engineers, and business teams to deliver analytics-ready ...

Senior Software Engineer - Backend

Hiring Organisation
Appcast
Location
London, UK
collaborate closely with stakeholders including Ratings, Business, and Operation teams to deliver scalable data infrastructure, APIs, and services with a focus on reliability, performance, data integrity, and innovation—including the integration of AI/ML capabilities to enhance data solutions and developer productivityHow You’ll Make an Impact: Lead … high-quality software delivery through automated testing, code reviews, observability, and engineering governance. Lead resolution of complex technical and operational challenges while improving platform performance, resiliency, and operational excellence. Champion DevSecOps, CI/CD, and automation practices to accelerate delivery and improve engineering efficiency. Evaluate and adopt emerging technologies ...

Data Engineer (Mid‐Level ), Global

Hiring Organisation
Appcast
Location
London, UK
transformations to produce curated datasets that support enterprise reporting, analytics, and downstream consumption.Take ownership of assigned data pipelines and datasets, including monitoring, troubleshooting, and performance optimization in production environments.Work with Azure Synapse (dedicated or serverless where applicable) to support analytical workloads and data consumption patterns.Collaborate with business analysts … views and tables in Azure Synapse to support analytics and reporting use cases.Respond to pipeline failures, data validation issues, and operational alerts.Perform basic performance tuning of Spark jobs (e.g., partitioning, filtering, incremental logic) within established architectural patterns and standards.Validate data outputs with business partners and address data defects ...

Platform Specialist - PLS

Hiring Organisation
SQUAREPOINT CAPITAL
Location
London, UK
scaling to support the growth of the company. This role requires in-depth knowledge of distributed storage systems, storage architectures, and storage protocols, including performance optimization, capacity planning, and data lifecycle management. The candidate will ideally have experience with on-premises storage infrastructure, network-attached storage, parallel file systems … object storage, and cloud-based storage platforms. Your day-to-day could consist of storage infrastructure design and deployment, performance tuning and troubleshooting, monitoring and alerting improvements, capacity management, automation and tool development, and much more. Main Duties & Responsibilities Design, deploy, and manage distributed storage systems efficiently ...