1 to 25 of 35 Contract Performance Tuning Jobs in London

Oracle DB technical Architect

Hiring Organisation
Randstad Digital
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £549 per day
migration and integration of databases across multi cloud database environments including Oracle Cloud AWS Azure and Google Cloud Ensure high availability scalability and performance of database systems Collaborate with cross functional teams to define and implement database solutions that meet business requirements. Requirements: Handson experience with migrating large databases … with migrating database to ATPADW Design Database consolidation and reduce OPEX spending Provide technical leadership and mentorship to junior database architects and administrators Conduct performance tuning capacity planning and security assessments Stay updated with the latest advancements in database technologies and cloud offerings Implement and manage Exadata ...

Data Engineer

Hiring Organisation
Robert Half Limited
Location
London, United Kingdom
Employment Type
Contract, Work From Home
move toward predictive analytics and ML Ops workflows. Role The Data Engineer will own and assess the Snowflake platform, proposing and executing optimisation around performance, cost, scalability, and architecture improvements. Lead DBT development and maintenance, with emphasis on test frameworks, transformation efficiency, and eliminating redundant or resource-heavy flows … maintain CI/CD pipelines to automate reliable deployment of data transformations. Provide deep insight into Snowflake infrastructure, including cost and pricing models, performance tuning, and resource governance. Support ML Ops/predictive analytics operationalisation - managing updates, performance monitoring, and change rollout rather than building models from ...

Senior C# Developer

Hiring Organisation
Adecco
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
teams and provide occasional out-of-hours support. Essential Skills Strong proficiency in .NET Framework/Core . Experience with SQL Server and Oracle performance tuning. Knowledge of secure SDLC practices and OWASP principles. Hands-on experience with CI/CD pipelines and troubleshooting across Windows Servers and databases. ...

Software Engineer - Database & Display

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
From £500 to £600 per day
Scripting C, C++, PERL, Java or equivalent for application interfacing and scripting Data Handling Real-time data acquisition, Historian integration, data replication, and logging Performance Tuning & Monitoring Query optimization, indexing, database health monitoring Version control with Git, SVN, or equivalent Design, develop and maintain databases and data models …/DMS/SCADA) Develop, enhance, and maintain display applications, dashboards, and HMI interfaces/Station displays for operators and engineers Ensure high performance, reliability, and integrity of database system under real-time operational loads Perform database tuning, indexing, query optimization, and performance monitoring Develop and maintain ...

Tech Lead - Data Analytics & Data Engineering (AWS) - SC+NPPV3

Hiring Organisation
Sanderson Government and Defence
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £600 per day
delivering data ingestion, transformation, and storage patterns using S3, AWS Glue, and Redshift Owning data architecture decisions, including data modelling, partitioning strategies, and performance optimisation Defining and enforcing engineering standards across code quality, testing, CI/CD, IaC, and observability Building and optimising ELT/ETL pipelines using Glue … domains Strong hands-on experience with: Amazon S3 (data lake patterns, partitioning, lifecycle management) AWS Glue (Jobs, Crawlers, PySpark, orchestration) Amazon Redshift (data modelling, performance tuning, WLM, Spectrum) Advanced Python (PySpark) and SQL skills Experience implementing CI/CD pipelines and Infrastructure as Code Proven ability to engage ...

Data Engineer Snowflake and Matillion - £425PD - Remote

Hiring Organisation
Tenth Revolution Group
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£350 - £425 per day
data from multiple sources into Snowflake Develop and optimize data models in Snowflake for analytics and reporting use cases Ensure data quality, reliability, and performance across pipelines and warehouse workloads Collaborate with analytics engineers, data analysts, and stakeholders to understand data requirements Implement best practices for Snowflake (clustering, scaling … cost optimization, security) Monitor and troubleshoot data pipelines, resolving failures and performance issues Manage and evolve data transformations using SQL and version control Document data pipelines, models, and business logic for long-term maintainability Support CI/CD processes and promote automation across the data platform Required Qualifications 3+ ...

Data Engineer (Snowflake and Matillion) - £425PD - Remote

Hiring Organisation
Tenth Revolution Group
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£350 - £425/day
data from multiple sources into Snowflake Develop and optimize data models in Snowflake for analytics and reporting use cases Ensure data quality, reliability, and performance across pipelines and warehouse workloads Collaborate with analytics engineers, data analysts, and stakeholders to understand data requirements Implement best practices for Snowflake (clustering, scaling … cost optimization, security) Monitor and troubleshoot data pipelines, resolving failures and performance issues Manage and evolve data transformations using SQL and version control Document data pipelines, models, and business logic for long-term maintainability Support CI/CD processes and promote automation across the data platform Required Qualifications 3+ ...

Data Scientist

Hiring Organisation
InfinityQuest Ltd,
Location
Uxbridge, London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £500 per day Inside IR35
monitor performance. Collaborate with Product, Engineering, and Business teams to translate business problems into AI solutions. Conduct model evaluation, A/B testing, and performance tuning. Document models, experiments, and technical processes. Required Skills & Qualifications:- Classic Machine learning (Regression, predictive Analysis, Classification, Clustering) Machine learning Model Optimisation Strong proficiency ...

Senior Data Engineer Big Data/ Hadoop/ Spark Banking

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£700 - £850 per day
prem data platforms, from high-level architecture to detailed technical design. Hands-on experience configuring multi-node Hadoop clusters, including resource management, security, and performance tuning. Strong Big Data engineering background using Apache Airflow, Spark, dbt, Kafka, and Hadoop ecosystem tools. Knowledge of RDBMS systems (PostgreSQL, SQL Server ...

Lead Data Engineer

Hiring Organisation
Vallum Associates Limited
Location
London, United Kingdom
Employment Type
Contract
designing and delivering large-scale data migrations Expert-level Python and SQL Infrastructure-as-Code using Terraform Data modelling and warehouse design (star schema, performance tuning) Strong experience with dbt and modern ELT patterns Excellent stakeholder communication and technical leadership skills ...

PostgreSQL resource

Hiring Organisation
Experis
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £460/day
writing, for specific database/specific technology requests, relating to cases and/or applications in scope. Perform application and process improvement; documentation; performance tuning; and technical strategy investigation upon request. Problem Management: Track, record, and process recurring tickets. Report automation opportunities for manual support tasks to client … continuous improvement initiatives as directed by the client. Basic functional support, application administration/server configuration and user access provisioning/portal setup. Performance and Application Monitoring Monitor performance and availability of the apps listed in Appendix 1 by using the clients provided toolset. Provide proactive exception monitoring ...

Data Migration Developer

Hiring Organisation
Matchtech
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
scheduling and monitoring via SQL Server Agent jobs Manage data integrations and migrations between SQL Server and Microsoft Dataverse using KingwaySoft Ensure data integrity, performance, and reliability across all integration processes Troubleshoot and resolve data-related issues, including failed jobs, performance bottlenecks, and data inconsistencies Collaborate with application … integrations Support deployment and release processes across development, test, and production environments Required Skills & Experience Strong experience in SQL Server development (T-SQL, performance tuning, indexing) Proven hands-on experience with SSIS development , including package configuration and deployment Experience creating and managing SQL Server Agent jobs and schedules ...

C# .NET Core Developer - Hybrid - Banking

Hiring Organisation
GCS
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £415/day Inside IR35
/TypeScript/React, Python, SQL Server, Oracle). The role focuses on refactoring legacy systems to reduce technical debt, improve reliability and performance, and embed modern security patterns across the service estate. Tasks Design, build, and maintain server-side and client-side software using .NET (Framework/Core … databases (SQL Server, Oracle); contribute to API and UI development, data access layers, and integration points. Refactor and modernise legacy codebases: modularisation, dependency updates, performance tuning, improved observability, and raising automated test coverage within CI/CD. Embed modern security patterns and controls across web services: strong authentication ...

Full-Stack Engineer - 6-month contract - Immediate Start

Hiring Organisation
The ECA International Group
Location
London, United Kingdom
Employment Type
Contract, Work From Home
fast-paced environment where innovation matters, this role is for you. Requirements Technical Leadership & Delivery Guide the design, development, and implementation of scalable, high-performance solutions. Partner with tech leads to ensure alignment with engineering best practices, architectural standards, and ECAs client objectives . Drive strong technical decision-making … continuous improvement . Lead by example with a proactive, solution-oriented mindset. What You Bring: Full-Stack Engineering Proven experience building scalable, high-performance full-stack applications . Strong hands-on experience with React, Tailwind CSS, Node.js, and TypeScript . Solid understanding of microservices and modular architecture . APIs ...

Senior Data Engineer (2 days onsite in London)

Hiring Organisation
TXP
Location
Westminster, London, City of Westminster, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £650/day
pipelines and integrations using Snowflake, Python, SQL, and C#. Skills and experience required: Strong proficiency in SQL, Python, and C# (including query optimisation and performance tuning). Experience with data modelling, ETL pipelines, and data integration. Proven ability to work directly with stakeholders and data users to understand ...

Systems Integrator (IT)

Hiring Organisation
Rullion Engineering Cumbria
Location
Teddington, London, United Kingdom
Employment Type
Contract
Contract Rate
£680/day
physical devices, software components, and network infrastructure. * You will develop and execute integration test plans for hardware/software systems. * You will perform functional, performance, and stress testing on integrated systems. * You will Identify and resolve integration issues across hardware, software, and network layers. * You will document and understand … different architectures supporting distributed, real-time systems. * You will understand how to administer Linux based environments, including performance tuning and security hardening. * You will develop and execute shell scripts for automation and system orchestration. * You will understand the systems engineering lifecycle * You will understand changes in CI/ ...

Data Engineer (Snowflake, SQL, Python)

Hiring Organisation
TXP
Location
Westminster, London, City of Westminster, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550/day
pipelines and integrations using Snowflake, Python, SQL, and C#. Skills and experience required: Strong proficiency in SQL, Python, and C# (including query optimisation and performance tuning). Experience with data modelling, ETL pipelines, and data integration. Proven ability to work directly with stakeholders and data users to understand ...

Data Engineer Snowflake, SQL, Python

Hiring Organisation
TXP Technology x People
Location
South West London, London, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £550 per day
pipelines and integrations using Snowflake, Python, SQL, and C#. Skills and experience required: Strong proficiency in SQL, Python, and C# (including query optimisation and performance tuning). Experience with data modelling, ETL pipelines, and data integration. Proven ability to work directly with stakeholders and data users to understand ...

Avaloq Developer

Hiring Organisation
FBI &TMT
Location
London, United Kingdom
Employment Type
Contract
Haves Avaloq Expertise: Proven experience with the Avaloq Banking Suite and its data model. Programming: Strong proficiency in Oracle PL/SQL (packages, procedures, performance tuning) and Avaloq Script . Core Banking Knowledge: Familiarity with the trade lifecycle (Front-to-Back), corporate actions, or accounting rules. ...

C# Oracle PL/SQL Developer - Banking

Hiring Organisation
GCS
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £415/day Inside IR35
code logic and database interactions. Key Skills & Requirements: Strong proficiency in C#/.NET and Oracle PL/SQL, including complex query analysis and performance tuning. Solid understanding of application server and Oracle database structures. Python scripting skills for automation or data analysis (desirable). Familiarity with data lineage ...

C# Oracle PL/SQL Developer Role

Hiring Organisation
GCS
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £415/day Inside IR35
code logic and database interactions. Key Skills & Requirements: Strong proficiency in C#/.NET and Oracle PL/SQL, including complex query analysis and performance tuning. Solid understanding of application server and Oracle database structures. Python scripting skills for automation or data analysis (desirable). Familiarity with data lineage ...

Azure Architect Linux

Hiring Organisation
Randstad Digital
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550 per day
potential). This is a unique opportunity to own the end-to-end solutioning-from initial assessment to high-level design and hands-on performance tuning. The Role As the Technical Lead for a team of 5+ engineers, you will drive the strategy and delivery of Azure Landing Zones … architectural roadmaps. Migration Excellence: Leading On-prem to Cloud transitions using Azure Migrate . Linux Mastery: Deep-dive troubleshooting of networking, clusters, and kernel tuning (RHEL/CentOS focus). Security & Governance: Managing Azure Key Vault, IAM, and high-security UNIX environments. What You'll Bring Experience: 12+ years ...

Snowflake Data Engineer

Hiring Organisation
Tenth Revolution Group
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£400 - £420 per day
advise on strategy , drive improvements , and deliver robust solutions . Key Responsibilities Design and implement data models that support business needs. Optimise performance across Snowflake and Matillion pipelines. Deliver hands-on solutions while advising on best practices . Collaborate with remote teams and communicate effectively. Bring fresh ideas … think outside the box . What We're Looking For Strong experience with Snowflake and Matillion . Solid understanding of data modelling and ETL performance tuning . Ability to challenge and improve processes , not just follow them. Excellent communication skills - confident and clear. A team player who fits ...

Snowflake & Matillion Data Engineer

Hiring Organisation
Tenth Revolution Group
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 400 - 420 Daily
advise on strategy , drive improvements , and deliver robust solutions . Key Responsibilities Design and implement data models that support business needs. Optimise performance across Snowflake and Matillion pipelines. Deliver hands-on solutions while advising on best practices . Collaborate with remote teams and communicate effectively. Bring fresh ideas … Matillion . Matillion is a non negotiable you must be strong in both Snowflake and Matillion. Solid understanding of data modelling and ETL performance tuning . Ability to challenge and improve processes , not just follow them. Excellent communication skills - confident and clear. ...

Data Engineer

Hiring Organisation
DCV Technologies Limited
Location
London, United Kingdom
Employment Type
Contract, Work From Home
contract role, ideal for specialists in secure API integration and legacy-to-digital transformation. The Role Youll design, build and support high-performance integration solutions using IBM DataPower Gateway, exposing core mainframe services as modern APIs. Working across hybrid environments, youll bridge z/OS applications with API platforms … backend platforms including MQ, Kafka and relational databases Support CI/CD automation using SOMA/REST APIs, Jenkins or Ansible Ensure high availability, performance tuning and regulatory compliance (e.g. PCI, GDPR) Required Skills Strong hands-on experience with IBM DataPower Gateway Proven mainframe integration experience (CICS ...