Senior Data Engineer (Cosmos DB, Azure)

We are seeking a Senior Data Engineer with expertise in Cosmos DB and Azure, skilled in designing, implementing, and maintaining robust cloud-based data solutions. This role focuses on ensuring platform reliability, optimizing performance, and enabling scalable and efficient data operations within a production-grade environment.ResponsibilitiesProvide end-to-end support for Cosmos DB–based databases, including monitoring, troubleshooting, and performance tuningWork extensively with Cosmos DB (NoSQL API) and other Cosmos DB variants (Core SQL, Mongo API, Cassandra API, Table API)Support and maintain data platform components within Azure FabricDiagnose and resolve production issues related to data access, latency, throughput, and availabilityImplement best practices for scalability, security, backup, and disaster recoveryCollaborate with application, data engineering, and platform teams to support data-driven solutionsContribute to automation, scripting, and operational improvementsParticipate in on-call or production support rotations as requiredDocument operational procedures and support knowledge baseRequirements5+ years of experience as a Data Engineer or in a similar roleStrong hands-on experience with Cosmos DB, including its NoSQL API and data variantsExpertise in managing data platforms hosted on Azure, including Azure FabricSolid understanding of NoSQL data modeling, partitioning techniques, and performance optimizationCompetency in troubleshooting production database issues in cloud environmentsProficiency in Azure tools and services for monitoring and managementStrong troubleshooting and analytical skillsCalm, methodical approach to production support and incident managementGood communication skills, ability to work with both technical and non-technical stakeholdersAbility to prioritize effectively in high-availability environmentsCollaborative mindset and ownership mentalityExcellent written and verbal communication skills in English (B2+ level)Nice to haveExperience with code generation, including non-AI and AI-assisted approachesExposure to Data Science workflowsExperience with Big Data platforms and distributed systemsKnowledge of financial instruments and financial services dataHands-on experience with industry-standard LLMs (including GPT, Claude, or similar)We offer/BenefitsWe gather like-minded people:Engineering community of industry professionalsFriendly team and enjoyable working environmentFlexible schedule and opportunity to work remotely within PolandChance to work abroad for up to 60 days annuallyBusiness-driven relocation opportunitiesWe provide growth opportunities:Outstanding career roadmapLeadership development, career advising, soft skills, and well-being programsCertification (GCP, Azure, AWS)Unlimited access to LinkedIn Learning, Get Abstract, Cloud GuruEnglish classesWe cover it all:Stable income (Employment Contract or B2B)Participation in the Employee Stock Purchase PlanBenefits package (health insurance, multisport, shopping vouchers)Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and moreReferral bonusesCorporate, social and well-being eventsPlease, note:The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview.We will reach out to selected candidates exclusively.EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.