Senior Database Engineer

About us

Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at:

We are looking for a strong Database Engineer who will own, scale, and evolve our data infrastructure, ensuring it remains fast, reliable, and ready for long-term growth.

As a Database Engineer at Ruby Labs, you will be responsible for designing, operating, and optimizing databases in a high-volume payments environment. This role goes far beyond basic CRUD operations — you will work with large datasets, complex queries, performance bottlenecks, migrations on massive tables, and analytics pipelines.

You will collaborate closely with backend engineers and product teams to ensure our data layer supports both transactional workloads and analytical use cases, including internal CRM search and observability.

You will be joining a high-talent, fully remote engineering organization with strong backend, infrastructure, and product teams. We value ownership, technical excellence, and pragmatic decision-making. Engineers at Ruby Labs work on real scale, real money, and real impact.

• Own and operate AWS Aurora (Postgre
  
  SQL) in a high-load production environment
• Design and evolve schemas for large transactional domains (payments, customers, subscriptions, events)
• Implement and maintain:
  • Table partitioning strategies (time-based, tenant-based, hybrid)
  • Advanced indexing (B-Tree, GIN, partial indexes)
  • Query optimization and execution-plan tuning
• Handle databases with millions of new records per month while maintaining predictable performance

• Analyze and optimize slow queries and production metrics
• Identify and resolve:
  • Lock contention
  • Vacuum / autovacuum issues
  • Connection pool saturation
  • Long-running or inefficient queries
• Proactively prevent performance regressions as data volume grows

• Design high-performance search solutions for large operational datasets used in internal CRM tools
• Implement efficient search strategies
• Balance flexibility, correctness, and performance at scale

• Work with event and log data pipelines, including Tinybird / Click House-based analytics
• Decide which data belongs in transactional databases vs analytical stores
• Enable fast, real-time insights for product, finance, and operations teams

• Ensure data integrity and consistency in financial workflows
• Define and monitor database health metrics (latency, replication lag, storage, IOPS)
• Plan and execute safe schema changes and migrations on large tables
• Participate in incident analysis related to data performance or availability
• Work in backups, replication, and disaster-recovery strategie

• Strong hands-on experience with Postgre
  
  SQL in production
• Experience managing large databases (hundreds of millions of rows or more)
• Solid understanding of:
  • Indexing strategies
  • Query planners and execution paths
  • Transactions, isolation levels, and locking
• Experience working with AWS-based infrastructure, ideally AWS Aurora
• Ability to independently investigate and resolve complex performance issues

• Experience in payments, billing, fintech, or financial systems
• Familiarity with analytical databases (Click House, Tinybird, or similar)
• Experience designing data models for multi-tenant systems
• Understanding of event-driven architectures and data pipelines
• AWS certifications (e.g., Solutions Architect, Database Specialty)

• You think in terms of scale, growth, and long-term impact
• You care deeply about correctness, performance, and reliability
• You’re proactive — you identify problems before they become incidents
• You’re comfortable owning critical infrastructure components
• You communicate clearly and collaborate effectively in a remote environment

Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are…