About Sand

Sand Technologies is a fast-growing enterprise AI company that solves real-world problems for large blue-chip companies and governments worldwide.

We’re pioneers of meaningful AI: our solutions go far beyond chatbots. We are using data and AI to solve the world’s biggest issues in telecommunications, sustainable water management, energy, healthcare, climate change, smart cities, and other areas that have a real impact on the world. For example, our AI systems help to manage the water supply for the entire city of London. We created the AI algorithms that enabled the 7th largest telecommunications company in the world to plan its network in 300 cities in record time. And we built a digital healthcare system that enables 30m people in a country to get world-class healthcare despite a shortage of doctors.

We’ve grown our revenues by over 500% in the last 12 months while winning prestigious scientific and industry awards for our cutting-edge technology. We’re underpinned by over 300 engineers and scientists working across Africa, Europe, the UK and the US.

About the role

As a Senior Data Warehouse Developer, you will implement scalable data pipelines, analytics solutions, and BI platforms using modern cloud technologies. Your work will ensure high-quality, secure, and reliable data systems that support a wide range of impactful projects.

Specific Responsibilities

• Design, implement and maintain our Data Warehouse
• Design, implement and maintain our Data Lake
• Design, implement and maintain of end-to-end business intelligence solutions, including data visualization, data modeling, ETL processes, and data warehousing
• Design, implement and maintain ETL processes for data extraction, transformation, and loading from various source systems into the data warehouse
• Maintain data security and quality
• Maintain and improve our standards of coding and deliveries
• Participate and contribute to the architecture design process
• Participate in reports design and review proposed solutions to ensure they meet accuracy, performance, usability and business requirements
• Review other people’s code and design
• Identify opportunities for improving data quality, reliability, and efficiency within the data warehouse environment
• Collaborate with cross-functional teams to gather and analyze data warehouse requirements
• Support and advise the Product and Project Manager team
• Provide technical mentorship to junior team members, guiding them in best practices for BI development and data engineering
• Keep up-to-date with the latest technologies and lead adoption initiatives

Requirements - Essential

• You have 5+ years of experience in data warehousing development, including ETL design, development, and implementation
• Proficiency in SQL programming and experience with relational database systems (e.g. SQL Server, PostgreSQL, AWS Redshift)
• Experience working with large-scale data warehouses and managing complex data integration projects
• Experience in development of near real-time DWH / data lake solutions
• You have expertise in Data Warehouse, ETL, and Report design and development
• You have strong analytical and troubleshooting skills
• You have extensive experience with report development using various tools (SSRS, Power BI, Tableau, QuickSight, Excel, etc.)
• You are fluent in modelling, managing, scaling and performance tuning of high volume data warehouse environments
• You have experience in working with structured and unstructured data
• You have experience with dimensional data modelling
• You are experienced and passionate about data storytelling with appealing graphics and visualizations
• You have the ability to translate business questions and requirements into reports, views, and BI query objects
• Language: Fluent written and spoken English

Requirements - Preferable

• BS/MS in Computer Science or equivalent
• You have experience with DBT
• You have experience with AWS tools (S3, Glue, Redshift, QuickSight, etc.)
• Self-learner and eager to learn new software tools/technologies
• Experience working with external APIs to extract and import data
• Experience with languages such as TypeScript/JavaScript, Bash, Python, Spark, PySpark or other similar programming languages

Personal Attributes

• Client Centricity & Integrity: We let Our Clients Run the Company, Surf Like Yvon to stay true to our values, and Play the Long Game with integrity.
• Collaboration and Inclusion: We live by Each One, Teach Ten and ensure Everybody is Welcome.
• Operational Excellence and Simplicity: We K.I.S.S. by keeping things simple while always striving to Raise the Bar.
• Action, Ownership, and Execution: We Decide, Get Stuff Done, and Do Hard Things with accountability.
• Growth, Innovation, and Resilience: We Choose Growth, Pioneer boldly, and remember There is No Failure.

Due to the considerable amount of virtual work and interaction with colleagues and customers in different physical locations internationally, it is essential that the successful applicant has the drive and ethic to succeed in working in small teams physically but in larger efforts virtually. Self-drive to communicate constantly using web collaboration and video conferencing is essential.