1 to 25 of 26 Contract Performance Optimisation Jobs in London

Azure Cosmos DB Admin and Developer

Hiring Organisation
Gazelle Global Consulting Ltd
Location
Central London, London, United Kingdom
Employment Type
Contract
searching for one of our key clients for an Azure Cosmos DB Admin & Developer to drive the build-out of cloud-native, high-performance financial applications. This role sits at the sharp end of modern banking engineering, owning the design, optimisation, and operational excellence of Cosmos DB across … mission-critical workloads. You will shape partitioning models, indexing strategies, consistency models, and performance tuning while building reusable frameworks in C#/.NET or Node.js. Expect close collaboration with architects and DevOps to embed Cosmos DB into microservices, backed by robust CI/CD through Azure DevOps. This position ...

Power BI Developer

Hiring Organisation
DGH Recruitment Ltd
Location
East London, London, United Kingdom
Employment Type
Contract
Contract Rate
£55000 - £60000/annum
Effective communication and agile team collaboration. Preferred Skills Experience with Azure Data Services (SQL, Data Factory, Synapse). Knowledge of reporting governance, security, and performance optimization. Integration with Microsoft tools (SharePoint, Power Apps, Teams). Exposure to REST APIs and MDM tools. In accordance with the Employment Agencies ...

Data Engineer

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£700 - £800 per day
data loading and dataset management in production environments* Work closely with ML practitioners to enable training and inference pipelines* Ensure efficient memory usage and performance when handling large datasets* Integrate data from SQL-based systems into cloud and ML pipelines* Apply best practices around reliability, monitoring, and scalability Required … cloud environments with large-scale file-based data Desired Experience * BigQuery (GCP)* SQL databases (Microsoft SQL Server preferred; PostgreSQL also acceptable)* Memory management and performance optimisation* Exposure to ML workflows (without being a dedicated ML Engineer) Nice to Have * Broader GCP experience (Cloud Run, Cloud SQL, Cloud Scheduler ...

SharePoint Developer

Hiring Organisation
VIQU IT Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£450 - £550 per day
OneDrive, and other Microsoft 365 services. Build PowerApps that connect to live data sources (Dataverse, SQL, SharePoint, APIs). Support ongoing maintenance, troubleshooting, and performance optimisation of Power Platform solutions. Apply now to speak with VIQU IT in confidence about the Sharepoint Developer role. Or reach ...

Senior Java Developer - Electronic Trading

Hiring Organisation
McGregor Boyall Associates Limited
Location
London, United Kingdom
Employment Type
Contract
latency, high-throughput trading engines that power the firm's EMEA and global electronic trading business. This includes delivery of key functional changes, performance optimisation, and close collaboration with quants and traders. Key Responsibilities Design, develop, and enhance algorithmic trading engines and core frameworks Partner with the Quant ...

Data Engineer Databricks

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£400 - £450 per day
designing and optimising large-scale data engineering solutions within the Databricks Data Intelligence Platform. This role is ideal for someone passionate about building high-performance data pipelines and ensuring robust data governance across modern cloud environments.Key Responsibilities Design, build, and maintain scalable data pipelines using Databricks Notebooks, Jobs … Workflows for both batch and streaming data. Optimise Spark and Delta Lake performance through efficient cluster configuration, adaptive query execution, and caching strategies. Conduct performance testing and cluster tuning to ensure cost-efficient, high-performing workloads. Implement data quality, lineage tracking, and access control policies aligned with Databricks ...

Data Engineer (Databricks)

Hiring Organisation
Hays Technology
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £450/day 450
designing and optimising large-scale data engineering solutions within the Databricks Data Intelligence Platform. This role is ideal for someone passionate about building high-performance data pipelines and ensuring robust data governance across modern cloud environments. Key Responsibilities Design, build, and maintain scalable data pipelines using Databricks Notebooks, Jobs … Workflows for both batch and streaming data. Optimise Spark and Delta Lake performance through efficient cluster configuration, adaptive query execution, and caching strategies. Conduct performance testing and cluster tuning to ensure cost-efficient, high-performing workloads. Implement data quality, lineage tracking, and access control policies aligned with Databricks ...

Databricks Data Engineer

Hiring Organisation
Hays Technology
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£450 - £475/day up to £475 (Inside IR35)
Data Engineer with Active Security Clearance (SC) Strong experience with Databricks, PySpark and Delta Lake Expertise in Jobs & Workflows, cluster tuning, and performance optimisation Solid understanding of Data governance (Unity Catalog, Lineage, Access Policies) Hands-on with Azure services: Data Lake Storage (Gen2), Key Vault, Azure Functions Familiarity … Excellent communication and collaboration skills Nice to have: Immediate availability Experience with enterprise-scale Databricks environments Knowledge of Azure Synapse, Power BI and cost optimisation strategies If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call ...

Databricks Data Engineer

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£450 - £475 per day
Data Engineer with Active Security Clearance (SC) Strong experience with Databricks, PySpark and Delta Lake Expertise in Jobs & Workflows, cluster tuning, and performance optimisation Solid understanding of Data governance (Unity Catalog, Lineage, Access Policies) Hands-on with Azure services: Data Lake Storage (Gen2), Key Vault, Azure Functions Familiarity … Excellent communication and collaboration skills Nice to have: Immediate availability Experience with enterprise-scale Databricks environments Knowledge of Azure Synapse, Power BI and cost optimisation strategies If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call ...

Data Scientist

Hiring Organisation
Hays Specialist Recruitment Limited
Location
West Drayton, Middlesex, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
Python and ML frameworks (TensorFlow, PyTorch). Strong statistical and analytical skills. Experience with a wide range of Data Science techniques (e.g. ML, Optimisation, Simulation, GenAI, etc.). Demonstrated ability to take models from design through to production deployment, including performance optimisation, monitoring, and integration into business ...

Portfolio Solutions MI Analyst

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
countries and products. Bordereaux and block payments (project/ongoing): design, build and maintain bordereaux solutions, reconciliations and linking to claims for pricing and performance MI. Digital Working Group participation (ongoing): contribute to ensuring digital data is accessible, accurate and fit for purpose for actuarial, underwriting and portfolio management. … digital or portfolio solutions initiatives, with demonstrable stakeholder management and delivery in a complex environment. Excellent Power BI skills: data modelling (star schemas), DAX, performance optimisation, UX best practice, row-level security, and governance of shared datasets/workspaces. Strong SQL across Microsoft SQL Server/SSMS; able ...

Technical Lead

Hiring Organisation
E-Solutions IT Services UK Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
team of developers, enhancing their technical capabilities and increasing productivity. 2. To conduct comprehensive code reviews, establish and oversee quality assurance processes, performance optimization , implementation of best practices and coding standards to ensure successful delivery of complex projects. 3. To ensure process compliance in the assigned module| and participate ...

UI Lead

Hiring Organisation
Ascendion
Location
BR1, Bromley Town, Greater London, United Kingdom
Employment Type
Permanent, Contract
ideal candidate will have deep expertise in React, RxJS, and modern UI frameworks, combined with strong leadership and architectural skills to deliver high-performance, scalable, and intuitive trading interfaces. Key Responsibilities: Lead UI Development: Own the design and implementation of the front-end architecture for the SDP. Collaborate with … backend teams to deliver seamless user experiences. Technical Leadership: Mentor and guide a team of UI engineers, ensuring best practices in coding, testing, and performance optimization. Integration: Ensure smooth integration with Java-based backend services and real-time data streams. Performance & Scalability: Optimize UI for low-latency, high ...

Lead Software Developer

Hiring Organisation
Experis
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £450 per day
Angular, or Vue.js. Back-End Development: Develop and maintain server-side logic with programming languages like .NET, Node.js, or Python. Nice to have skills: Performance Optimization: Identify and resolve performance bottlenecks in both front-end and back-end systems. Experience with monitoring and logging tools such as Azure ...

Databricks Data Engineer Azure Cloud & Performance Optimization

Hiring Organisation
Brightbox GRP Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £458 per day, Benefits remote
Databricks Data Engineer Azure Cloud & Performance Optimization £400-£458pd (Inside IR35) SC Clearance is Essential Remote Overview We are seeking a Databricks Data Engineer experienced in building high-quality data pipelines and optimizing large-scale workloads on the Databricks Data Intelligence Platform. The ideal candidate is strong in PySpark … Delta Lake, Azure services, workflow automation, and performance tuning. Key Responsibilities Build and maintain scalable batch and streaming pipelines using Databricks notebooks, Jobs, and Workflows. Optimize Spark and Delta Lake performance through cluster tuning, efficient configurations, AQE, and caching. Run performance tests and ensure workloads are cost ...

Senior Data Engineer OLAP

Hiring Organisation
Oscar Technology
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£550 - £600 per day
experience - this role is for you . This is a hands-on, onsite position where you'll architect and optimise analytical models, build high-performance data pipelines, and design robust semantic layers that directly power business-critical reporting and Excel-based analysis. Required Skills: OLAP, Tabular, Semantoc Layer Expertise … Multidimensional modelling (MUST have) Proven experience designing semantic layers , calculated measures, perspectives, hierarchies, partitions, aggregation strategies Strong Power BI semantic model understanding (datasets, relationships, optimisation) Ability to dynamically load data into Excel using OLAP cubes - essential Expert in DAX/MDX , cube optimisation, processing strategies Data Engineering ...

Data Engineer - £350PD - Remote

Hiring Organisation
Tenth Revolution Group
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£300 - £350 per day
processing patterns (CDC, watermarking, upserts) AWS Data Services Amazon S3: data lake architectures, partitioning strategies, lifecycle policies DynamoDB: data modeling, secondary indexes, streams, and performance optimization Amazon Redshift: foundational querying, integrations, and performance considerations AWS Lambda for scalable data processing and orchestration Amazon EventBridge for event-driven … decoupled data pipelines Vector Databases & Embeddings Strong understanding of vector database concepts, indexing strategies, and performance trade-offs Design and implementation of embedding generation pipelines Optimization techniques for semantic search and retrieval accuracy Effective chunking strategies for document ingestion and processing Experience with CockroachDB deployment and management is beneficial ...

Data Engineer - £350PD - Remote

Hiring Organisation
Tenth Revolution Group
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£300 - £350/day
processing patterns (CDC, watermarking, upserts) AWS Data Services Amazon S3: data lake architectures, partitioning strategies, lifecycle policies DynamoDB: data modeling, secondary indexes, streams, and performance optimization Amazon Redshift: foundational querying, integrations, and performance considerations AWS Lambda for scalable data processing and orchestration Amazon EventBridge for event-driven … decoupled data pipelines Vector Databases & Embeddings Strong understanding of vector database concepts, indexing strategies, and performance trade-offs Design and implementation of embedding generation pipelines Optimization techniques for semantic search and retrieval accuracy Effective chunking strategies for document ingestion and processing Experience with CockroachDB deployment and management is beneficial ...

Guidewire PolicyCenter Senior Developer

Hiring Organisation
Initialize IT
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Daily
Guidewire Data Model and database schema. Support the creation a data feed from Guidewire PolicyCenter V10/V9 and Cloud (nice to have) 4. Performance Optimization & Troubleshooting Ability to profile and debug PolicyCenter performance issues. Understanding of caching strategies, efficient querying, and memory management. 5. Guidewire Best Practices ...

L3 Data Engineer - Support

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
From £250 to £270 per day
structured telecom datasets (CDRs, network logs, subscriber data) Data Lake Technologies: Expertise in Apache Iceberg table format Schema evolution, partitioning, compaction & metadata management Query performance tuning with Athena & Redshift Spectrum Redshift Expertise: Data modeling, distribution styles, sort keys Workload management (WLM) Performance optimization & troubleshooting Python: Automation scripts Data … processing workflows Monitoring, debugging, validation scripts AWS Support/Operations: Troubleshooting ETL failures, performance bottlenecks, pipeline issues Monitoring cloud workloads (CloudWatch, CloudTrail) Handling incidents, root-cause analysis (RCA), patching & releases Cost optimization and resource usage tracking Data quality checks for telecom data pipelines Roles & Responsibilities Provide L2/ ...

Databricks Data Engineer Azure Cloud & Performance Optimization

Hiring Organisation
Brightbox GRP Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 400 - 458 Daily
Databricks Data Engineer Azure Cloud & Performance Optimization £400-£458pd (Inside IR35) SC Clearance is Essential Remote Overview We are seeking a Databricks Data Engineer experienced in building high-quality data pipelines and optimizing large-scale workloads on the Databricks Data Intelligence Platform click apply for full job details ...

Guidewire PolicyCenter Senior Developer

Hiring Organisation
Intuition IT Solutions Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Daily
Guidewire Data Model and database schema. Support the creation a data feed from Guidewire PolicyCenter V10/V9 and Cloud (nice to have) 4. Performance Optimization & Troubleshooting Ability to profile and debug PolicyCenter performance issues. Understanding of caching strategies, efficient querying, and memory management. 5. Guidewire Best Practices ...

Data Engineer (SC Cleared)

Hiring Organisation
Syntax Consultancy Limited
Location
South West London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
500/day (Inside IR35)
Warehouse patterns, Gold Layer modelling, defining/implementing ingestion + transformation pipelines (Dataflows Gen2, Notebooks), establishing modelling standards for Gold Layer + semantic models, performance optimization, lineage/observability, governance, RBAC, security, data retention. Team Leading/Delivery: setting standards, directing/mentoring the team, reviewing designs, unblocking delivery. … orchestration, testing, test data preparation, reporting validation, release practices. Operational Readiness: ensuring documentation/run books + non-functional requirements are met (security, resilience, performance). Short-Term Objective: baseline Gold Layer model components to enable consistent semantic models and reporting. ...

Data Engineer (SC Cleared)

Hiring Organisation
Syntax Consultancy Ltd
Location
SW1H 0BB, City of Westminster, Greater London, United Kingdom
Employment Type
Contract
Contract Rate
£500/day 500/day (Inside IR35)
Warehouse patterns, Gold Layer modelling, defining/implementing ingestion + transformation pipelines (Dataflows Gen2, Notebooks), establishing modelling standards for Gold Layer + semantic models, performance optimization, lineage/observability, governance, RBAC, security, data retention. Team Leading/Delivery: setting standards, directing/mentoring the team, reviewing designs, unblocking delivery. … orchestration, testing, test data preparation, reporting validation, release practices. Operational Readiness: ensuring documentation/run books + non-functional requirements are met (security, resilience, performance). Short-Term Objective: baseline Gold Layer model components to enable consistent semantic models and reporting. ...

Data Engineer (MS Fabric)

Hiring Organisation
Syntax Consultancy Limited
Location
South West London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
500/day (Inside IR35)
Warehouse patterns, Gold Layer modelling, defining/implementing ingestion + transformation pipelines (Dataflows Gen2, Notebooks), establishing modelling standards for Gold Layer + semantic models, performance optimization, lineage/observability, governance, RBAC, security, data retention. Team Leading/Delivery: setting standards, directing/mentoring the team, reviewing designs, unblocking delivery. … orchestration, testing, test data preparation, reporting validation, release practices. Operational Readiness: ensuring documentation/run books + non-functional requirements are met (security, resilience, performance). Short-Term Objective: baseline Gold Layer model components to enable consistent semantic models and reporting. SC Clearance preferred, but the client will also ...