Senior Software Engineer – Ruby

Job not on LinkedIn

🕒 September 22

🇵🇱 Poland – Remote

⏰ Full Time

🟠 Senior

🧑‍💻 Full-stack Engineer

👻 Ghost score 10%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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SOFTSWISS

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

💼 Consulting

📣 Marketing

🎮 Gaming

Consulting • Marketing • Gaming

SOFTSWISS is a leading provider of iGaming software solutions, offering a wide range of products including iGaming Platform, Sportsbook Platform, Game Aggregator, Jackpot Aggregator, and more. Established in 2009, SOFTSWISS has grown to employ over 1,700 people across 4 international offices in Poland, Georgia, Malta, and several remote locations. The company is known for its innovation in the iGaming industry, being the first Crypto iGaming provider in the world. SOFTSWISS not only promotes a dynamic and flexible work culture with comprehensive employee benefits but also commits to social responsibility by supporting various campaigns and initiatives.

📋 Description

• Design and evolve core architecture of a high-load Data Quality platform running millions of checks per day • Improve throughput, latency and reliability of orchestration, scheduling, dependency resolution, retries and mutation-driven reruns • Profile and optimise PostgreSQL-heavy production workloads reaching approximately 4,000 RPS • Lead backend migration of statistics and analytical workloads from PostgreSQL to ClickHouse • Build and evolve product features around DQ coverage, table lineage, incident lifecycle and operational investigation • Contribute to platform UI features when necessary to deliver end-to-end product capabilities, using AI-assisted development workflows • Own reliability and production behaviour of backend services • Investigate incidents, diagnose performance bottlenecks, improve observability and prevent recurrence • Participate in a 24/7 on-call rotation • Help scale DQ adoption across the company by making integrations, configuration and operation of checks reliable and approachable • Work directly with data producers, infrastructure and business teams • Proactively identify product, technical and operational problems and drive production-ready improvements

🎯 Requirements

• Strong Ruby and Rails skills • Strong experience developing and operating high-load production systems • Deep PostgreSQL expertise: query planning and profiling, indexes, locking, transactions, concurrency, connection behaviour and performance tuning under sustained load • Strong SQL skills and ability to investigate complex data discrepancies across large, multi-source datasets • Experience with asynchronous systems: background jobs, queues, retries, idempotency and failure recovery • Experience designing complex backend systems from scratch and evolving them safely in production • Hands-on production ownership: metrics, logs, tracing, incident investigation and performance analysis • Strong practical use of AI-powered developer tools: navigating unfamiliar codebases, prototyping, debugging, reviewing and delivering changes faster, while critically validating the result • Product mindset and entrepreneurial ownership: ability to see an opportunity, formulate a solution, validate it with users or data, and drive it through delivery • Intermediate or higher English (B1+) • Familiarity with ClickHouse • Familiarity with Delta Lake, Trino, Spark or DuckDB • Experience with Debezium (or any other CDC implementation), Kafka, data ingestion & transformation patterns • Experience with Kubernetes, Helm, Prometheus/Grafana and production service operations • Experience building side projects, launching product capabilities, or independently improving a product beyond assigned tasks

🏖️ Benefits

• Private health insurance • Sports benefits • Comprehensive Mental Health Program • Free English lessons (online) • Local language courses • Paid time off • Maternity leave support • Referral program rewards • Upskilling, internal workshops, and participation in professional conferences and corporate events