Senior Ruby Developer

We are looking for a Senior Ruby Developer to join our dynamic and collaborative team. The client is an American multinational enterprise specializing in software solutions, offering a cloud-based platform that facilitates the seamless automation, integration, and coordination of artificial intelligence (AI) functionalities across a wide range of applications, data environments, and IT systems. It is a hybrid position with required visits to the office in Wroclaw, Krakow, Gdansk, Warsaw, Katowice, Lodz or Poznan. Responsibilities Develop and maintain scalable, high-performance web applications using Ruby and RailsOptimize complex database queries and ensure efficient use of PostgreSQLDesign and implement clean, maintainable code with strong adherence to TDD/BDD principles using RSpecCollaborate with cross-functional teams to define and deliver technical solutions that align with business goalsConduct code reviews and mentor junior developers to uphold quality standardsAddress scalability and performance issues, implementing enhancements to improve reliabilityWork closely with product owners to translate requirements into technical implementationsDebug and troubleshoot production issues, identifying root causes and implementing responsive fixesParticipate in architectural design and contribute to long-term system improvementsOversee deployment processes and ensure application stability in production environmentsStay updated on emerging technologies and practices to bring innovative solutions to the team Requirements Strong experience with Ruby and the Rails ecosystem (3+ years)Proven ability to build scalable web applicationsDeep hands-on expertise in PostgreSQL, including query optimization and direct SQL usageSolid experience with RSpec and TDD/BDD testing practicesComfortable working independently with minimal supervisionEnglish level of minimum B2 (Upper-Intermediate) for effective communication Nice to have Experience using Docker for containerizationFamiliarity with Redis for caching or real-time data handlingExposure to ClickHouse for analytics or event loggingBasic frontend experience with JavaScript and frameworks like React, Angular, or Vue.jsExperience with background job processing tools like Sidekiq or RabbitMQUnderstanding of CI/CD pipelines and Git-based workflowsGood communication and collaboration skills We offer We gather like-minded people:Top tech minds driving innovation in AI, cloud and digital platform modernizationSupportive team and agile, startup-like cultureHybrid by design mode and opportunity to work remotely within PolandChance to work abroad for up to 60 days annuallyBusiness-driven relocation opportunitiesWe provide growth opportunities:Career development programsThought leadership, mentoring, soft skills and well-being programsCertification (Anthropic, Gemini, GCP, Azure, AWS)English classesWe cover it all:Stable payParticipation in the Employee Stock Purchase Plan with a 15% discountBenefits package (health insurance, multisport, shopping vouchers)Referral bonuses up to $2,000Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and moreCorporate, social and well-being eventsPlease, note:Benefits listed above are available to employees onlyWe are open for working with Contractors. Terms of B2B cooperation agreements are agreed individuallyWe will reach out to selected candidates exclusively EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.