501 to 525 of 4,213 SQL Jobs in London

Hybrid role, the AI team work from our Moorgate (London) Offices 2 days per week. The Role Our platform runs on .NET and SQL Server on Azure, and it has grown well beyond what it was originally designed for. We're hiring our first dedicated Database Performance Engineer … trusted to call out what needs re-architecting. What You’ll Do Own query and index performance across our transactional SQL Server estate, using execution plans, Query Store, wait statistics, real production telemetry or other data driven measures. Investigate and implement horizontal scaling techniques such as multi-cluster architecture, contained ...

robust semantic/data models for reporting Developing complex DAX measures and calculations Using Power Query/M for data transformation Working extensively with SQL and multiple underlying data sources Creating intuitive dashboards for technical, operational and senior stakeholders Improving existing reporting processes and replacing manual reporting where appropriate Ensuring … specialists Producing clear documentation and supporting knowledge transfer Experience we’re looking for Strong experience across: Microsoft Power BI DAX Power Query/M SQL Data modelling and dashboard design Connecting Power BI to multiple data sources Building reporting solutions from complex datasets Translating stakeholder requirements into technical solutions Data ...

Hybrid role, the AI team work from our Moorgate (London) Offices 2 days per week. The RoleOur platform runs on .NET and SQL Server on Azure, and it has grown well beyond what it was originally designed for. We're hiring our first dedicated Database Performance Engineer to own performance … reliability, and you'll be trusted to call out what needs re-architecting. What You'll DoOwn query and index performance across our transactional SQL Server estate, using execution plans, Query Store, wait statistics, real production telemetry or other data driven measures. Investigate and implement horizontal scaling techniques such ...

subscription and marketplace economics, including LTV modeling, cohort dynamics, retention mechanics, pricing trade-offs, and long-term value optimization. Strong technical proficiency (e.g., SQL, Python) with the ability to review and elevate the analytical work of others, set coding standards, and design scalable analytical workflows. Experience mentoring and technically guiding ...

maintain ETL/ELT pipelines to ingest, transform, and prepare data Develop and optimise datasets for reporting and analytics Implement data transformations using SQL and Python (incl. PySpark) Monitor, troubleshoot, and improve performance of data pipelines and queries Apply data quality controls and maintain clear documentation Contribute to ongoing improvements … improvement Support incident management and ongoing maintenance of BI solutions Skills & Experience Experience with AWS data services (e.g. Redshift, Athena, S3, Glue, Lambda) Strong SQL skills Exposure to SnapLogic or similar integration platforms Proficiency in Python (including PySpark) Familiarity with modern data tooling (e.g. open table formats, DuckDB beneficial) Experience ...

verbal communication skills in English. Ability to work independently and within distributed international teams. Technical Skills Python (Expert Level) C# JavaScript/TypeScript SQL AI & Machine Learning Machine Learning Deep Learning Neural Networks Natural Language Processing (NLP) Generative AI Large Language Models (LLMs) Retrieval-Augmented Generation (RAG) Reinforcement Learning Frameworks ...

than simply maintaining existing pipelines. Working within a growing data team, you'll design scalable data models, build robust ELT pipelines in Databricks using SQL, Python and PySpark, and integrate data from multiple internal and third-party systems. You'll collaborate closely with Analytics Engineers to ensure data is reliable … approaches, improve platform architecture and help define long-term data standards, rather than simply delivering against predefined requirements. You’ll need experience with: Databricks, SQL, Python and PySpark Building and optimising ELT/data pipelines Data modelling, lakehouse architecture and modern data platforms Azure data services API and third-party ...

deliver data products that are reliable, scalable and fit for purpose. The role is suited to engineers who are comfortable writing code, working with SQL and distributed data processing, and solving practical delivery problems in a team environment. More experienced candidates may also contribute to technical design, platform standards … with evidence of strong quantitative skills or data engineering expertise. Strong hands‐on programming experience in Python or Java . Good working knowledge of SQL , including troubleshooting, optimisation and data analysis. Ability to learn new tools, internal platforms and delivery workflows quickly. Familiarity with software engineering fundamentals, including version control ...

Troubleshoot system issues, bugs and user queries Improve workflows, forms and customer enquiry processes Support integrations, upgrades, testing and data migrations Write and run SQL queries Monitor and improve data quality Produce reporting for sales, marketing and operations Build dashboards using Power BI, Tableau or similar Analyse customer enquiries, conversion …/systems experience who is confident taking ownership and getting stuck into technical problems. You’ll ideally have: Strong hands-on CRM experience Good SQL skills and the ability to build queries independently Experience with sales, customer or enquiry-based CRM systems Strong Excel and reporting capabilities Power BI, Tableau ...

collaborative, senior-led environment. What You'll Be Doing Design, build and support cloud-based services in .NET 10 across Azure API Management, Azure SQL and the wider Azure platform. Help modernise a business-critical booking platform using an incremental strangler-fig migration approach. Work on anti-corruption layers …/C#. Recent experience with modern .NET, ideally .NET 8 or later. Blazor experience. Strong Azure experience, including App Service or Container Apps, Azure SQL, API Management and Azure DevOps pipelines. Experience modernising legacy systems, ideally using strangler-fig or similar incremental migration approaches. Good understanding of REST API design ...

scalable, secure and maintainable data solutions Practical experience with data replication and change data capture (CDC) technologies in large, complex environments Experience with Python, SQL, data pipelines, ETL/ELT, data modelling and cloud-based data platforms Ability to work through ambiguity, understand customer outcomes and make pragmatic technical decisions ...

grade data pipelines within modern cloud environments. You will have strong expertise in Azure Databricks, including PySpark, Delta Lake and Databricks Jobs, alongside excellent SQL skills and a solid understanding of medallion architecture principles. Comfortable working with data from CRM, MIS, Finance and HR systems, you will have experience building ...

Deep technical expertise with Apache Spark/Azure Databricks for distributed compute, memory optimization, and Delta Lake formats. Data Engineering Languages: Advanced proficiency in SQL (T-SQL, SparkSQL) and Python (PySpark). Security & Compliance: Direct experience implementing security controls for sensitive or identifiable data, utilizing Azure Key Vault, Azure Monitor … Analytics, and Microsoft Purview. Data Integration: Proven track record of migrating, refactoring, or connecting legacy SQL/stored procedure logic and existing pipelines into modern cloud formats. #J-18808-Ljbffr ...

cross-team reviews and helping define what production-grade analytics looks like at Pleo. For extra context, you'll also be leveraging technologies including SQL, dbt, BigQuery, Looker, Amplitude, HubSpot, Zuora, or Vitally. What you bring Prior experience operating at Staff or Lead level in data analytics or analytics engineering … roles in a fast-paced SaaS organisation. Expert knowledge of SQL and dbt: you write clean, tested, well-architected models and can make and defend layering decisions for a team, not just yourself. Solid proficiency with Python for data analysis and manipulation. Comfort with Git-based workflows and CI/ ...

data transformation, combining technical depth with commercial leadership and the ability to influence stakeholders across the business. Must-Have Advanced Power BI, Excel, SQL and Python capability Experience with Azure data environments and Azure Data Factory Strong knowledge of data platforms, pipelines, integrations and governance Experience delivering automation … governance experience Experience developing client-facing data or analytics services Strong statistical analysis and insight generation capabilities Tagged as: Azure, Excel, Power BI, Python, SQL #J-18808-Ljbffr ...

environments. Good understanding of finance data structures, controls, reporting requirements, and the importance of data lineage in regulated reporting environments. Practical analytical skills using SQL and structured data analysis techniques; experience with reporting datasets and BI concepts. Ability to work confidently with both business and technical stakeholders and translate requirements … finance environments. Familiarity with Power BI, Qlik, Excel-based reporting packs, or other enterprise reporting tools used alongside ERP platforms. Practical analytical skills using SQL and structured data analysis techniques. Experience in insurance, technical accounting, reinsurance, actuarial, IFRS 17, or other regulated data environments. Exposure to controlled testing approaches, including ...

backend services and APIs using C# and .NET.Develop scalable, low-latency components with a focus on performance, reliability and security. Work with relational databases (SQL Server preferred), including schema design, query optimisation and stored procedures where appropriate. Integrate with internal and third-party systems using REST and messaging patterns. Write … modern .NET (.NET 6+), including asynchronous programming and dependency injection. Experience building RESTful APIs and service-oriented architectures (microservices beneficial).Solid knowledge of SQL and database fundamentals; familiarity with ORM tools (e.g., Entity Framework) and performance tuning. Experience with automated testing (xUnit/NUnit/MSTest), mocking and test-driven ...

technical solutions. API Development: Helping build and document APIs that deliver a seamless data experience for internal and external stakeholders. Database Operations: Working with SQL and NoSQL databases, helping to optimize schemas and write efficient queries to support high-volume transactions. Billing Infrastructure Support: Contributing to a reliable billing architecture … Language Foundation: 2–3 years of experience (including internships or intensive projects) in any programming language development. Database Basics: Academic or professional exposure to SQL; you should be comfortable writing queries and understand basic schema design. Version Control: Familiarity with Git and a basic understanding of CI/CD concepts. ...

existing teampatterns and standards. Implement changes to existing pipelines and tables in response to defined requirements,including backfills and schema updates. Write and optimise SQL for large-scale datasets; investigate and fix data quality issues raisedthrough monitoring or stakeholder reports. Add and maintain data quality checks, tests and documentation … management Requirements Bachelor's degree in computer science, engineering, or a related technical field, or equivalentpractical experience. 5+ years building production data pipelines. Strong SQL, including performance tuning on large tables. Python for data transformation and pipeline orchestration. Experience with a distributed query engine (Presto, Spark, Hive or similar ...

thousands of users, while producing bullet-proof code that is robust, efficient, and maintainable; our primary tools are C#, .NET Framework, Python, JSON, SQL Server, AWS and Databricks. Collaborate with your QA resources to ensure that the software you deliver is of the highest quality. (Our customers are not beta … commitment to prior employers.5+ years of .NET development (C#) development experience including cross-platform communication technologies such as Web API.3+ years of experience with SQL Server, writing SQL queries, data matching/cleansing/enriching as well as ETL/data pipeline engineering. A demonstrable track record of building ...

interpersonal skills* Comprehensive understanding of risk management methodologies and valuation models* Proficiency in Microsoft Excel, VBA, and other data analysis tools (Python and SQL is a plus)* Good knowledge of Access and SQL Server* Fluent in English, both written and spoken, French and/or any other European language ...

logs, and documentation systematically rather than guessing. Data modeling. You design cross functional data products, establish data contracts, and handle complex business rules. Advanced SQL, including window functions, query optimization, and MERGE/UPSERT operations. Python and PySpark. You write reusable, parameterized functions and work comfortably with JSON … building the harness around them: repo conventions, reusable context, tests and guardrails that make agent output trustworthy. Geospatial data processing (H3 indexes, spatial SQL, point in polygon at scale). Recursive CTEs and complex SQL patterns. Infrastructure familiarity (Azure Portal, resource management, CLI). Strong Git workflows and code review ...

Knowledge of risk management tools and systems used in the equity derivatives market. Data Analysis Tools: Proficiency in data analysis tools such as Excel, SQL, and statistical software (e.g., R, Python). Project Management Tools: Familiarity with project management and collaboration tools such as JIRA, Confluence, or Trello. Reporting ...

environment. API Development: Design and build RESTful API endpoints using NodeJS and Express, including detailed API documentation. Database Management: Design, optimize, and maintain complex SQL data models, ensuring efficient data structures, query performance, and reliability. Full‐Stack Development: Develop responsive and performant front‐end applications using ReactJS, focusing … building RESTful APIs Leadership: Proven track record of leading development teams and managing large‐scale projects. Database Expertise: In‐depth experience with PostgreSQL/SQL, including design of complex schemas, writing queries and performance optimisation. Security & Performance: Deep understanding of application security best practices, performance tuning, and scalable architecture. Problem ...

Analytics team is looking for a Sr Data Analyst, Search Marketing who is, at their core, a strong analyst — sharp with data, comfortable in SQL, and genuinely fluent in the search landscape: how paid and organic search interact, how the SERP evolves, and how that translates into traffic and revenue. … business cases. Support the development of analyses and recommendations that improve search traffic and commercial outcomes over time. Skills & Experience A solid analyst first — SQL and structured thinking come naturally to you, and you enjoy getting into the details of the data Data driven — you let the numbers guide ...