Senior Database Engineer

TL;DR

Senior Database Engineer: Own, scale, and evolve data infrastructure, ensuring it remains fast, reliable, and ready for long-term growth with an accent on designing, operating, and optimizing databases in a high-volume payments environment. Focus on large datasets, complex queries, performance bottlenecks, migrations on massive tables, and analytics pipelines.

Location: Applicants from any country are welcome to apply for the position as long as they are located within approximately ± 4 hours of CET.

Company

Ruby Labs is a leading tech company that creates and operates innovative consumer products.

What you will do

• Own and operate AWS Aurora (PostgreSQL) in a high-load production environment.
• Analyze and optimize slow queries and production metrics, resolving issues like lock contention and connection pool saturation.
• Design high-performance search solutions for large operational datasets used in internal CRM tools.
• Work with event and log data pipelines, including Tinybird / ClickHouse-based analytics.
• Ensure data integrity and consistency in financial workflows.
• Plan and execute safe schema changes and migrations on large tables.

Requirements

• Strong hands-on experience with PostgreSQL in production.
• Experience managing large databases (hundreds of millions of rows or more).
• Solid understanding of indexing strategies, query planners, and transactions.
• Experience working with AWS-based infrastructure, ideally AWS Aurora.
• Ability to independently investigate and resolve complex performance issues.

Nice to have

• Experience in payments, billing, fintech, or financial systems.
• Familiarity with analytical databases (ClickHouse, 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).

Culture & Benefits

• Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
• Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
• Celebrate and relax on national holidays with paid time off to unwind and recharge.
• Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
• Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities with a flexible independent contractor agreement.

Hiring process

• Recruiter Screening (40 minutes)
• Technical Interview (60 minutes)
• Final Interview (30 minutes)