Allwyn UK
Watford, Hertfordshire
Join our journey to create a new experience for The National Lottery and help us to power change for the greater good. We are Allwyn UK, part of the Allwyn Entertainment Group - a multi-national lottery operator with a market-leading presence across Europe which includes: Czech Republic, Austria, Greece, Cyprus & Italy. While the main contribution of The National Lottery to society is through the funds to good causes, at Allwyn we put our purpose and values at the heart of everything we do. Join us as we embark on a once-in-a-lifetime, large-scale transformation journey by creating a National Lottery that delivers more money to good causes. We'll talk a bit more about us further down the page, but for now - let's talk about the role and who we're looking for A bit about the role The Senior Data Analyst reports directly to the Data Engineering Manager and is responsible for analyzing and profiling data to identify data quality issues and inconsistencies. The Senior Data Analyst works closely with the BI Business Analyst to ensure that the data within the warehouse meets the needs of the reporting requirements and understands how to implement any new reporting needs. What you'll be doing Design, Development and Dashboarding Developing and maintaining data mappings and transformations to support ETL processes specifically for reporting. Designing and maintaining DWH Data models and specific reporting layer technologies. Designing and creating reports, dashboards and data visualizations to meet business needs. Support data driven approach to customer interaction and business design. Assist the Automation team with the relevant automation parameters. Effort Estimation Analyse assigned tasks to accurately estimate the level of effort needed. Collaboration, Engagement & Design Alignment Creating and maintaining data dictionaries and metadata documentation. Collaborating with BI, especially with BI business analysts to support report and dashboard development. Collaborating with data engineers and other teams to integrate data from diverse sources into the data warehouse. Collaborating with data engineers and developers to optimize ETL processes and data workflows. Staying up-to-date with data warehousing and analytics trends and best practices. Conduct peer reviews and regularly synchronize with the engineering and reporting teams to ensure data developments align with reporting dashboards and analytics needs. Governance & Compliance Implement data governance best practices, ensuring data quality, integrity, and security across developed reports and dashboards. Ensure data accuracy, completeness, and consistency in the data warehouse. Collaborate with Security and Compliance teams to adhere to data privacy regulations and internal policies. Assist in the development and execution of data validation and quality assurance processes. Monitoring and analysing data warehouse performance to identify and address bottlenecks or issues. Support for Data Ops & Priority Issue Resolution Supporting data warehouse users by troubleshooting data-related issues and providing data insights. Code Review & Efficient Unit Testing Practices Adhere to the best practices provided by Data Engineering manager and ensure reviews are implemented. Ensure applying the agreed frameworks and writing the test cases. Key Measures of Success: 1. Timely delivery of development and tasks assigned On-time completion of data insights or feature enhancements. On-time completion of user reports and dashboards for ultimate completion and deployment by either the BI Data Engineers (for data) and BI reporting Team (for final dashboards and reports). On-time completion of deployment of new data insights adhering to the set method of deployment. 2. Data Quality & Accuracy Reduction in data discrepancies and errors across specific reporting layers. Successful implementation of automated data quality checks and alerts. 3. Timely Delivery of Insights Improved speed of data availability for downstream analytics and reporting platforms. 4. Engagement Positive feedback from team members regarding attitude and collaboration. 5. Reporting & External Integration Alignment Smooth collaboration with reporting team and external partners, reflected in consistent implementation as provided by the Data Engineering Manager. Positive cross-functional feedback on data availability, usability, and performance. Successful alignment with product and business goals as measured by project deliverables and feedback surveys. What experience we're looking for 1. Technical Expertise Strong SQL skills for data querying and analysis. Proficiency in data visualization tools (e.g., Tableau, Power BI). Knowledge of data modeling concepts and ETL processes. Familiarity with data warehouse technologies and databases. Data Modeling: Strong knowledge of schema design, dimensional modeling, and normalization best practices. Attention to detail and strong analytical skills. Effective communication and collaboration skills. Problem solving abilities to resolve data related issues. Understanding of data quality and data governance principles. Basic knowledge of programming languages (e.g., Python) may be beneficial. 2. Communication Excellent communication skills to translate complex data requirements into actionable insights. Proven ability to collaborate effectively with cross functional stakeholders (Product, Analytics, Reporting, BI, etc.). 3. Project & Effort Management Experience managing multiple data initiatives simultaneously, prioritizing tasks, and meeting deadlines. Proven track record accurately estimating tasks effort. Strong analytical capability to identify resolutions to issues raised. 4. Educational Background Bachelor's degree in computer science, information technology, or a related field (or equivalent work experience). 5. Additional Qualifications Certification in relevant data analysis or reporting tools is advantageous. Knowledge of Betting and Gaming (Lottery) domain is preferred. Prior experience working with large-scale data environments in a fast-paced or startup-like setting is a plus. About us: We've developed ground breaking technologies, built player protection frameworks, and have a proven track record of making lotteries better. Innovation - We pride ourselves on it! We're constantly looking for new ways to excite our customers, bringing new products to enjoy which is all underpinned by our responsible play values and making them accessible to all. Giving back - Did you know that playing the lottery generates around £30m a week for charities and good causes in the UK? Our aim is to have doubled this number by the end of the first 10 year licence Sustainability - Our aim to be net zero by 2030 which would make us the first lottery provider globally to achieve this Inclusion and accessibility - We are making all parts of The National Lottery inclusive - whether you play a game in a store or online. If you need any assistance or adjustments to this job description or in the application process, please contact a member of the talent team at and we'll be happy to help. Being the custodians of the National Lottery license is a big responsibility, so all of our roles are subject to extensive background checks An inclusive reward offering with wellbeing at the centre At Allwyn, we've put together a range of inclusive benefits and policies to support our colleagues at every stage of their lives and careers. Here's a list of some of the fantastic benefits we offer Company bonus scheme Matched pension contributions up to 8.5% 26 days annual leave + 2 Life Days (and bank holidays) Complimentary Private Medical Life Assurance Enhanced Maternity & Paternity leave £500 wellness allowance Access to nutritional advisor and personal trainers Discounted Health Assessments Complimentary Financial coaching Our benefits and policies reflect our commitment to wellbeing and inclusivity and are enhanced with features that benefit our colleagues (and their families). By offering a variety of benefits that support our colleagues, we continue to create a place of work where people feel rewarded and can succeed. A place of belonging We want to create one of the UK's most inclusive organisations - where people can bring the best of themselves, to do their best work, every day, for the benefit of good causes. Allwyn is an Equal Opportunity Employer which prides itself in being diverse and inclusive. We do not tolerate discrimination, harassment, or victimisation in the workplace. All employment decisions at Allwyn are based on the business needs, the job requirements, and the individual qualifications. Allwyn encourages applications from individuals regardless of age, disability (visible or hidden), sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion or belief and marriage and civil partnerships. . click apply for full job details
Join our journey to create a new experience for The National Lottery and help us to power change for the greater good. We are Allwyn UK, part of the Allwyn Entertainment Group - a multi-national lottery operator with a market-leading presence across Europe which includes: Czech Republic, Austria, Greece, Cyprus & Italy. While the main contribution of The National Lottery to society is through the funds to good causes, at Allwyn we put our purpose and values at the heart of everything we do. Join us as we embark on a once-in-a-lifetime, large-scale transformation journey by creating a National Lottery that delivers more money to good causes. We'll talk a bit more about us further down the page, but for now - let's talk about the role and who we're looking for A bit about the role The Senior Data Analyst reports directly to the Data Engineering Manager and is responsible for analyzing and profiling data to identify data quality issues and inconsistencies. The Senior Data Analyst works closely with the BI Business Analyst to ensure that the data within the warehouse meets the needs of the reporting requirements and understands how to implement any new reporting needs. What you'll be doing Design, Development and Dashboarding Developing and maintaining data mappings and transformations to support ETL processes specifically for reporting. Designing and maintaining DWH Data models and specific reporting layer technologies. Designing and creating reports, dashboards and data visualizations to meet business needs. Support data driven approach to customer interaction and business design. Assist the Automation team with the relevant automation parameters. Effort Estimation Analyse assigned tasks to accurately estimate the level of effort needed. Collaboration, Engagement & Design Alignment Creating and maintaining data dictionaries and metadata documentation. Collaborating with BI, especially with BI business analysts to support report and dashboard development. Collaborating with data engineers and other teams to integrate data from diverse sources into the data warehouse. Collaborating with data engineers and developers to optimize ETL processes and data workflows. Staying up-to-date with data warehousing and analytics trends and best practices. Conduct peer reviews and regularly synchronize with the engineering and reporting teams to ensure data developments align with reporting dashboards and analytics needs. Governance & Compliance Implement data governance best practices, ensuring data quality, integrity, and security across developed reports and dashboards. Ensure data accuracy, completeness, and consistency in the data warehouse. Collaborate with Security and Compliance teams to adhere to data privacy regulations and internal policies. Assist in the development and execution of data validation and quality assurance processes. Monitoring and analysing data warehouse performance to identify and address bottlenecks or issues. Support for Data Ops & Priority Issue Resolution Supporting data warehouse users by troubleshooting data-related issues and providing data insights. Code Review & Efficient Unit Testing Practices Adhere to the best practices provided by Data Engineering manager and ensure reviews are implemented. Ensure applying the agreed frameworks and writing the test cases. Key Measures of Success: 1. Timely delivery of development and tasks assigned On-time completion of data insights or feature enhancements. On-time completion of user reports and dashboards for ultimate completion and deployment by either the BI Data Engineers (for data) and BI reporting Team (for final dashboards and reports). On-time completion of deployment of new data insights adhering to the set method of deployment. 2. Data Quality & Accuracy Reduction in data discrepancies and errors across specific reporting layers. Successful implementation of automated data quality checks and alerts. 3. Timely Delivery of Insights Improved speed of data availability for downstream analytics and reporting platforms. 4. Engagement Positive feedback from team members regarding attitude and collaboration. 5. Reporting & External Integration Alignment Smooth collaboration with reporting team and external partners, reflected in consistent implementation as provided by the Data Engineering Manager. Positive cross-functional feedback on data availability, usability, and performance. Successful alignment with product and business goals as measured by project deliverables and feedback surveys. What experience we're looking for 1. Technical Expertise Strong SQL skills for data querying and analysis. Proficiency in data visualization tools (e.g., Tableau, Power BI). Knowledge of data modeling concepts and ETL processes. Familiarity with data warehouse technologies and databases. Data Modeling: Strong knowledge of schema design, dimensional modeling, and normalization best practices. Attention to detail and strong analytical skills. Effective communication and collaboration skills. Problem solving abilities to resolve data related issues. Understanding of data quality and data governance principles. Basic knowledge of programming languages (e.g., Python) may be beneficial. 2. Communication Excellent communication skills to translate complex data requirements into actionable insights. Proven ability to collaborate effectively with cross functional stakeholders (Product, Analytics, Reporting, BI, etc.). 3. Project & Effort Management Experience managing multiple data initiatives simultaneously, prioritizing tasks, and meeting deadlines. Proven track record accurately estimating tasks effort. Strong analytical capability to identify resolutions to issues raised. 4. Educational Background Bachelor's degree in computer science, information technology, or a related field (or equivalent work experience). 5. Additional Qualifications Certification in relevant data analysis or reporting tools is advantageous. Knowledge of Betting and Gaming (Lottery) domain is preferred. Prior experience working with large-scale data environments in a fast-paced or startup-like setting is a plus. About us: We've developed ground breaking technologies, built player protection frameworks, and have a proven track record of making lotteries better. Innovation - We pride ourselves on it! We're constantly looking for new ways to excite our customers, bringing new products to enjoy which is all underpinned by our responsible play values and making them accessible to all. Giving back - Did you know that playing the lottery generates around £30m a week for charities and good causes in the UK? Our aim is to have doubled this number by the end of the first 10 year licence Sustainability - Our aim to be net zero by 2030 which would make us the first lottery provider globally to achieve this Inclusion and accessibility - We are making all parts of The National Lottery inclusive - whether you play a game in a store or online. If you need any assistance or adjustments to this job description or in the application process, please contact a member of the talent team at and we'll be happy to help. Being the custodians of the National Lottery license is a big responsibility, so all of our roles are subject to extensive background checks An inclusive reward offering with wellbeing at the centre At Allwyn, we've put together a range of inclusive benefits and policies to support our colleagues at every stage of their lives and careers. Here's a list of some of the fantastic benefits we offer Company bonus scheme Matched pension contributions up to 8.5% 26 days annual leave + 2 Life Days (and bank holidays) Complimentary Private Medical Life Assurance Enhanced Maternity & Paternity leave £500 wellness allowance Access to nutritional advisor and personal trainers Discounted Health Assessments Complimentary Financial coaching Our benefits and policies reflect our commitment to wellbeing and inclusivity and are enhanced with features that benefit our colleagues (and their families). By offering a variety of benefits that support our colleagues, we continue to create a place of work where people feel rewarded and can succeed. A place of belonging We want to create one of the UK's most inclusive organisations - where people can bring the best of themselves, to do their best work, every day, for the benefit of good causes. Allwyn is an Equal Opportunity Employer which prides itself in being diverse and inclusive. We do not tolerate discrimination, harassment, or victimisation in the workplace. All employment decisions at Allwyn are based on the business needs, the job requirements, and the individual qualifications. Allwyn encourages applications from individuals regardless of age, disability (visible or hidden), sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion or belief and marriage and civil partnerships. . click apply for full job details
Allwyn UK
Watford, Hertfordshire
At the heart of everything we do is our vision to change lives every day, and our mission to grow The National Lottery responsibly and champion its impact. We are Allwyn UK, part of the Allwyn Entertainment Group - a multi-national lottery operator with a market-leading presence acrossthe USA (Michigan and Illinois) andEurope, includingCzech Republic, Austria, Greece, Cyprusand Italy. While the main contribution of The National Lottery to society is through the funds to good causes, at Allwyn we put our purpose and values at the heart of everything we do. Join us as we embark on a once-in-a-lifetime, largescale transformation journey by creating a National Lottery that delivers more money to good causes. We'll talk a bit more about us further down the page, but for now - let's talk about the role and who we're looking for A bit about the role The Head of AI is responsible for shaping and delivering Allwyn UK's AI strategy, translating strategic ambition into practical, high-impact AI and data science solutions. Reporting to the Director of Data & AI, the role will build and lead a high performing AI and Data Science function, working closely with Allwyn UK business leaders and Allwyn Group colleagues to leverage shared capabilities and best practice. The role plays a critical part in driving measurable commercial value, improving operational efficiency, and ensuring AI products are well-governed, scalable, and adopted across the organisation. Whatyou'llbe doing Shape and deliver the AI strategy for Allwyn UK, aligned to business priorities and the wider Group direction Translate strategic AI objectives into a clear, prioritised delivery roadmap Build, lead, and develop a multidisciplinary AI and Data Science team, including AI scientists, developers and engineers Own the AI innovation agenda across Player, Retail, Digital, Marketing, and Security Lead the design, development, and deployment of advanced analytics and AI products that deliver measurable commercial and operational benefits Partner closely with Tech, BI, and Data Governance teams to ensure scalable platforms, strong data foundations, and cost-effective governance Act as the senior AI partner to business leaders, ensuring AI solutions are adopted and deliver real-world impact Identify, prioritise, and shape AI use cases that support growth, improve responsible instant games growth (RIGG), and enhance operational efficiency Establish and embed AI model governance, monitoring, and lifecycle management Create and maintain a robust measurement framework to demonstrate ROI and value assurance for AI investments Build and manage effective relationships with third party analytics partners, vendors, and academic institutions Stay close to emerging AI and data science trends, applying relevant best practice to Allwyn UK's context What experience we're looking for Demonstrable experience shaping and delivering an AI or advanced analytics strategy within a complex organisation Proven experience building and leading AI, Data Science, or Advanced Analytics teams, including capability development and performance management Strong experience across advanced analytics techniques, such as machine learning, GenAI/LLMs, automation, forecasting, optimisation, segmentation, and propensity modelling Practical experience using modern data science and analytics tools (e.g. Python, SQL) in production environments A clear track record of developing and deploying well governed AI products with measurable business or P&L impact Strong commercial acumen, with evidence of translating data and AI into revenue growth, customer satisfaction, efficiency gains, or cost reduction Experience working with large, complex data environments, including the use of external data sources Proven ability to influence C-suite, senior stakeholders and drive decision making using insight and evidence Experience managing third party agencies, vendors, or strategic partners Degree or postgraduate qualification in a relevant field (e.g. Data Science, Mathematics, Computer Science, Engineering) or equivalent demonstrable experience Key Measures of Success Delivery of AI and advanced analytics initiatives that generate measurable commercial or operational value within agreed business areas Successful build out, engagement, and retention of a high-performing AI and Data Science team Percentage of prioritised AI use cases successfully deployed into production with clear ownership and monitoring Demonstrable ROI and value assurance across the AI investment portfolio Positive senior stakeholder feedback on the relevance, quality, adoption, and impact of AI-driven products and insight About us At Allwyn, we are dedicated to changing lives and growing the National Lottery responsibly, championing its positive impact on people, places, and the planet. Innovation -We pride ourselves on it!We'reconstantly looking for new ways to excite our customers, bringing new products to market to enjoy which is all supported by our responsible play values and making them accessible to all. Giving back -Did you know that playing the lottery generates around £30m a week for charities andgood causesin the UK? Our aim is to have doubled this number by the end of the first 10-year license. Sustainability -Our aim is to become a net zero national lottery. We have 2030 targets to decarbonise our operations and energy.We'vealready transitioned to renewable energy providers, made our London and Watford offices zero gas, and ensured our fleet consists of low-emission vehicles. In addition,we'reworking with our value chain partners to develop a net zero target date. Empowering every voice- We believe in creating a culture where everyone feels they belong, can be themselves, has access to opportunities and can thrive for the benefit of good causes.Our diverse teams are working hard to make all parts of The National Lottery inclusive - whether people play a game in a store or online,because when everyone can play, everyonewins An inclusive reward offering with wellbeing at the centre At Allwyn, inclusion is built into how we care for our people. Our benefits and policies support colleaguesand their familiesat every stage of life and career. By prioritising wellbeing and belonging, we create a workplace where everyone feels valued, rewarded, and empowered to succeed.Our people are more than colleagues -they'rewinners, driving positive change and making a real difference in communities. We are a Disability Confident Leader which meanswe'vetaken proactive steps to ensure our workplace is accessible and inclusive for disabled and neurodivergent colleagues and candidates. As part of this we offer an interview to disabled applicants who meet the essential requirements of the job. If you need anyassistanceor adjustments to this job description or in the application process, please contact a member of the talent team at andwe'llbe happy to help. BENEFITS CompanyBonusScheme Matched pension contributions up to 8.5% 26 days annual leave + 2 Life Days (and bank holidays) Single Private Health Cover Complimentary Private Medical Income Protection Flexible Benefits - EV Scheme,Money Coach, Will Writing,Mortgage Advice,Dental and Eye Care Schemes. EnhancedFamily Leave (Maternity,Paternity, Adoption) WellnessAllowance£500 Employee AssistanceProgramme Discounted Health Assessments Volunteering Days Matched Funding
At the heart of everything we do is our vision to change lives every day, and our mission to grow The National Lottery responsibly and champion its impact. We are Allwyn UK, part of the Allwyn Entertainment Group - a multi-national lottery operator with a market-leading presence acrossthe USA (Michigan and Illinois) andEurope, includingCzech Republic, Austria, Greece, Cyprusand Italy. While the main contribution of The National Lottery to society is through the funds to good causes, at Allwyn we put our purpose and values at the heart of everything we do. Join us as we embark on a once-in-a-lifetime, largescale transformation journey by creating a National Lottery that delivers more money to good causes. We'll talk a bit more about us further down the page, but for now - let's talk about the role and who we're looking for A bit about the role The Head of AI is responsible for shaping and delivering Allwyn UK's AI strategy, translating strategic ambition into practical, high-impact AI and data science solutions. Reporting to the Director of Data & AI, the role will build and lead a high performing AI and Data Science function, working closely with Allwyn UK business leaders and Allwyn Group colleagues to leverage shared capabilities and best practice. The role plays a critical part in driving measurable commercial value, improving operational efficiency, and ensuring AI products are well-governed, scalable, and adopted across the organisation. Whatyou'llbe doing Shape and deliver the AI strategy for Allwyn UK, aligned to business priorities and the wider Group direction Translate strategic AI objectives into a clear, prioritised delivery roadmap Build, lead, and develop a multidisciplinary AI and Data Science team, including AI scientists, developers and engineers Own the AI innovation agenda across Player, Retail, Digital, Marketing, and Security Lead the design, development, and deployment of advanced analytics and AI products that deliver measurable commercial and operational benefits Partner closely with Tech, BI, and Data Governance teams to ensure scalable platforms, strong data foundations, and cost-effective governance Act as the senior AI partner to business leaders, ensuring AI solutions are adopted and deliver real-world impact Identify, prioritise, and shape AI use cases that support growth, improve responsible instant games growth (RIGG), and enhance operational efficiency Establish and embed AI model governance, monitoring, and lifecycle management Create and maintain a robust measurement framework to demonstrate ROI and value assurance for AI investments Build and manage effective relationships with third party analytics partners, vendors, and academic institutions Stay close to emerging AI and data science trends, applying relevant best practice to Allwyn UK's context What experience we're looking for Demonstrable experience shaping and delivering an AI or advanced analytics strategy within a complex organisation Proven experience building and leading AI, Data Science, or Advanced Analytics teams, including capability development and performance management Strong experience across advanced analytics techniques, such as machine learning, GenAI/LLMs, automation, forecasting, optimisation, segmentation, and propensity modelling Practical experience using modern data science and analytics tools (e.g. Python, SQL) in production environments A clear track record of developing and deploying well governed AI products with measurable business or P&L impact Strong commercial acumen, with evidence of translating data and AI into revenue growth, customer satisfaction, efficiency gains, or cost reduction Experience working with large, complex data environments, including the use of external data sources Proven ability to influence C-suite, senior stakeholders and drive decision making using insight and evidence Experience managing third party agencies, vendors, or strategic partners Degree or postgraduate qualification in a relevant field (e.g. Data Science, Mathematics, Computer Science, Engineering) or equivalent demonstrable experience Key Measures of Success Delivery of AI and advanced analytics initiatives that generate measurable commercial or operational value within agreed business areas Successful build out, engagement, and retention of a high-performing AI and Data Science team Percentage of prioritised AI use cases successfully deployed into production with clear ownership and monitoring Demonstrable ROI and value assurance across the AI investment portfolio Positive senior stakeholder feedback on the relevance, quality, adoption, and impact of AI-driven products and insight About us At Allwyn, we are dedicated to changing lives and growing the National Lottery responsibly, championing its positive impact on people, places, and the planet. Innovation -We pride ourselves on it!We'reconstantly looking for new ways to excite our customers, bringing new products to market to enjoy which is all supported by our responsible play values and making them accessible to all. Giving back -Did you know that playing the lottery generates around £30m a week for charities andgood causesin the UK? Our aim is to have doubled this number by the end of the first 10-year license. Sustainability -Our aim is to become a net zero national lottery. We have 2030 targets to decarbonise our operations and energy.We'vealready transitioned to renewable energy providers, made our London and Watford offices zero gas, and ensured our fleet consists of low-emission vehicles. In addition,we'reworking with our value chain partners to develop a net zero target date. Empowering every voice- We believe in creating a culture where everyone feels they belong, can be themselves, has access to opportunities and can thrive for the benefit of good causes.Our diverse teams are working hard to make all parts of The National Lottery inclusive - whether people play a game in a store or online,because when everyone can play, everyonewins An inclusive reward offering with wellbeing at the centre At Allwyn, inclusion is built into how we care for our people. Our benefits and policies support colleaguesand their familiesat every stage of life and career. By prioritising wellbeing and belonging, we create a workplace where everyone feels valued, rewarded, and empowered to succeed.Our people are more than colleagues -they'rewinners, driving positive change and making a real difference in communities. We are a Disability Confident Leader which meanswe'vetaken proactive steps to ensure our workplace is accessible and inclusive for disabled and neurodivergent colleagues and candidates. As part of this we offer an interview to disabled applicants who meet the essential requirements of the job. If you need anyassistanceor adjustments to this job description or in the application process, please contact a member of the talent team at andwe'llbe happy to help. BENEFITS CompanyBonusScheme Matched pension contributions up to 8.5% 26 days annual leave + 2 Life Days (and bank holidays) Single Private Health Cover Complimentary Private Medical Income Protection Flexible Benefits - EV Scheme,Money Coach, Will Writing,Mortgage Advice,Dental and Eye Care Schemes. EnhancedFamily Leave (Maternity,Paternity, Adoption) WellnessAllowance£500 Employee AssistanceProgramme Discounted Health Assessments Volunteering Days Matched Funding