Data Platform Developer

Responsibilities

• Write, optimize and troubleshoot complex SQL queries and database operations.
• Contribute to database design, schema evolution and modernization of legacy database structures while working closely with developers to improve data models, application queries and overall database performance.
• Support large-scale data migrations, B2B integrations and live production changes with accuracy and attention to detail.
• Help maintain and improve real-time data pipelines and integrations between operational databases and analytics platforms.
• Collaborate openly across development, DevOps and Data teams while contributing to documentation, knowledge sharing and continuous improvement initiatives.
• Support and maintain MySQL, MongoDB and related systems across development and production environments.
• Participate in performance tuning, troubleshooting, monitoring and operational improvements.
• Automate recurring operational and development-related tasks.
• Support deployments, releases, access management, change processes and incident handling.
• Continuously learn and contribute to modern database engineering and data platform practices.
• About you:
• Essentials:
• 2-5 years of experience working with MySQL and/or MongoDB.
• Exposure to cloud platforms (BigQuery, AWS, GCP).
• Strong database development skills with confidence writing, optimizing and troubleshooting complex SQL queries.
• Good understanding of database design principles, schema evolution and performance optimization.
• Strong interest in databases, data engineering and modern data platforms.
• Strong communication and collaboration skills with the ability to work closely across development, BI/Data Warehouse and DevOps teams.
• Strong aptitude to learn, grow and take ownership in a hands-on engineering environment.
• Comfortable working with live production systems and operational environments.
• Experience with scripting or automation using Python, Bash or similar tools.
• Proactive, communicative and solution-oriented mindset.
• Proficient in English, both spoken and written.

Benefits

Additional Information

ComeOn Group in short Founded in 2008, ComeOn Group is a leading global player in the rapidly growing iGaming market. Having launched its first online brand in 2010, ComeOn Group is running a wide range of exciting brands across multiple markets. Operating more than 20 brands on its proprietary platform providing a secure, innovative and entertainment-led player experience across casino and sports betting. ComeOn Group is an international employer within the iGaming industry and has over 500 talented employees across 7 main locations. Location: Stockholm, Sweden ComeOn Group is a data-driven company, and our Database Platform Engineering & Operations team plays a key role in enabling reliable and scalable data across the business. We are looking for a hands-on Database Platform Engineer with strong database development skills and a passion for working with data systems in production. You will work closely with operations, engineering and data teams across the company, supporting MySQL and MongoDB environments while contributing to schema design, query optimization, and performance improvements. This role is ideal for someone who enjoys both development and operational work. You will be involved in supporting live systems, handling data migrations and integrations, modernizing legacy systems and helping improve how data flows across the organization. A strong willingness to learn, take ownership, and grow in the areas of databases and data engineering is essential. The position offers the opportunity to develop into broader database and data platform responsibilities over time, contributing to the reliability, performance and evolution of our data systems.

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