Software Engineer (Ruby) – Senior

Location: Worldwide

Company

Build and operate a high-load Data Quality platform used across the company to detect, investigate, and prevent data issues.

What you will do

• Design and evolve the architecture of a platform running millions of data quality checks per day.
• Improve orchestration, scheduling, dependency resolution, retries, reruns, throughput, latency, and reliability.
• Profile and optimise PostgreSQL workloads reaching approximately 4,000 RPS.
• Lead the migration of statistics and analytical workloads from PostgreSQL to ClickHouse.
• Build features for data quality coverage, table lineage, incident lifecycle, and operational investigation.
• Own service reliability, observability, incident response, and participation in a 24/7 on-call rotation.

Requirements

• Strong Ruby and Rails skills.
• Experience developing and operating high-load production systems.
• Deep PostgreSQL expertise, including query planning, profiling, indexes, locking, transactions, concurrency, and performance tuning.
• Strong SQL skills and experience investigating complex discrepancies across large, multi-source datasets.
• Experience with asynchronous systems, background jobs, queues, retries, idempotency, and failure recovery.
• Intermediate or higher English proficiency (B1+).

Nice to have

• Familiarity with ClickHouse, Delta Lake, Trino, Spark, or DuckDB.
• Experience with Debezium or other CDC implementations, Kafka, and data ingestion and transformation patterns.
• Experience with Kubernetes, Helm, Prometheus, Grafana, and production service operations.
• Experience launching product capabilities, building side projects, or independently improving products.

Culture & Benefits

• Private health insurance and sports benefits.
• Comprehensive mental health program.
• Free online English lessons and local language courses.
• Paid time off and maternity leave support.
• Upskilling, internal workshops, professional conferences, corporate events, and referral rewards.