Senior Software Developer
William Hill is looking for a Senior Software Developer to join the Data International team in Kraków. The role involves developing, maintaining, and enhancing central data warehouses and cloud data platforms to support business-critical systems.
The successful candidate will work alongside local and international colleagues to deliver reliable data solutions. This position focuses on the evolution of modern cloud-based data platforms using technologies such as SQL Server, AWS, Snowflake, and Apache Airflow.
- Lead the delivery of complex data warehouse enhancements, from requirements analysis through to deployment and post-release validation.
- Design, develop and maintain T-SQL code, data integrations and ETL processes that ensure accuracy, performance and reliability.
- Support and optimise production data systems, investigating incidents and implementing long-term improvements.
- Participate in an on-call rota, taking ownership of troubleshooting, recovery activities and stakeholder communication.
- Monitor and enhance data processing, operational procedures and platform performance.
- Assess technical risks, plan deployments and ensure changes can be released safely and efficiently.
- Review technical designs and mentor other engineers, helping to share knowledge and engineering best practices.
- Collaborate with analysts, architects and engineering teams to deliver scalable, business-focused data solutions.
- Significant experience developing and supporting enterprise data warehouse solutions using Microsoft SQL Server, T-SQL and SSIS (required).
- Expertise in SQL performance optimisation, ETL development, data modelling and troubleshooting production data environments (required).
- Experience with software engineering best practices including testing, code reviews, version control and technical documentation (required).
- Excellent communication skills, with the ability to work independently on complex challenges and collaborate effectively across teams (required).
- Experience with AWS, Snowflake, Apache Airflow, Kafka or Python (nice-to-have).
- Competitive base salary.
- Fully paid private healthcare via Lux Med.
- Company-sponsored life assurance plan.
- Wellbeing support including workshops, webinars, a psychological helpline, and access to platforms such as Unmind.
- Social activities including meetups, quality questions events and hackathons.
- Access to underground parking for cars, motorcycles and bikes.
- Fully paid Multisport pass or MyBenefit cafeteria points.
- Employee referral program.
- Extra day off for your birthday.
- Free English and Polish classes.
- Hybrid working model with up to 80% remote work.
William Hill is one of the UK's best-known bookmakers, founded by its namesake in 1934 taking bets around Birmingham. It has since grown into an international, multi-brand betting and gaming business spanning online and retail. The company is now part of evoke plc (formerly 888 Holdings), one of the world's leading online betting and gaming groups. Headquartered in London, William Hill operates sports betting and gaming products across multiple markets.