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Senior Backend Engineer (Ruby on Rails) – Appodeal, Inc.Join to apply for the Senior Backend Engineer (Ruby on Rails) role at Appodeal, Inc.Appodeal is a dynamic US‑based product company with a truly global presence. We have offices in Warsaw, Barcelona and Virginia along with remote team members located around the world. Our company thrives on diversity, collaboration, and innovation, making us a leader in the mobile‑app monetization space.Why Appodeal? At Appodeal, we’re more than just a company—we’re a team united by a common mission: to help every person discover and grow their talentsWe take pride in our cutting‑edge product and our internationally dispersed team of talented professionals. Here’s what we value, and what we hope you do too:Continuous Learning and Growth: We are passionate about learning, growing personally, and building rewarding careers.Making an Impact: We are committed to building a history‑defining company that leaves a lasting impact on the mobile app industry.Solving Exciting Challenges: We tackle complex problems every day, supported by a team of world‑class professionals and mentors.Enjoying the Journey: We believe in having fun while working toward our goals.RequirementsBackend Development5+ years of professional software development experience.3+ years of hands‑on Ruby on Rails experience in production environments.Strong understanding of Go fundamentals and experience building production services.Proficiency with SQL, particularly PostgreSQL (complex queries, performance optimization, indexing strategies).Data & AnalyticsExperience with OLAP databases and columnar storage systems (Clickhouse or similar: Druid, Vertica, etc.).Hands‑on experience with data pipeline development and orchestration.Understanding of ETL/ELT patterns and data processing workflows.Distributed SystemsProduction experience with message streaming platforms (Kafka, RabbitMQ, or similar).Understanding of event‑driven architectures and async processing patterns.Experience with distributed systems challenges (consistency, reliability, scalability).Infrastructure & PerformancePractical experience with caching strategies using Redis, Memcached, or similar.Understanding of database performance tuning and query optimization.Experience debugging and resolving production issues in complex systems.ResponsibilitiesDesign, develop, and maintain high‑load backend services in Ruby and Go.Own end‑to‑end delivery of backend features, from design and implementation to deployment and monitoring.Work closely with Product and Data teams to experiment with and roll out monetization strategies.Actively participate in incident response, root‑cause analysis, and post‑mortems.Ensure accurate event tracking, logging, and metrics for monetization and system health.Collaborate with Data Science/Analytics teams to expose reliable data pipelines.Build dashboards and alerts to monitor system performance and revenue‑critical KPIs.Write clean, maintainable, and well‑tested code (unit, integration, and load tests).Conduct code reviews and help raise the overall engineering bar.Reduce technical debt and continuously improve system architecture.Translate product and business requirements into robust technical solutions.Take ownership of key services or domains within the mediation platform.Proactively identify risks, bottlenecks, and improvement opportunities.Influence the technical roadmap and long‑term platform strategy.With an outstanding product and a mission that excites and inspires, Appodeal offers a unique opportunity to make an impact while being part of an amazing team.Join us and help shape the future of mobile app successSeniority levelMid‑Senior levelEmployment typeFull‑timeJob functionEngineering and Information TechnologyIndustriesIT Services and IT Consulting#J-18808-Ljbffr
