Senior Database Administrator (MongoDB)

We are seeking a Senior Database Administrator to lead the design, implementation and optimization of robust, scalable MongoDB environments. This role requires deep technical expertise, leadership in complex database operations and a collaborative approach to working with cross-functional teams to ensure high availability and performance. Responsibilities • Architect, implement and manage large-scale MongoDB deployments including replica sets and sharded clusters • Drive performance tuning, query optimization, indexing strategies and workload analysis • Lead backup/restore strategy design, disaster recovery planning, point-in-time recovery and high availability configurations • Support major upgrade activities, schema design improvements, version migrations and cloud migrations • Troubleshoot complex issues related to locking, replication lag, sharding balancer and storage performance • Implement monitoring, alerting and automation to improve operational efficiency • Provide mentoring and support to L1/L2 DBAs and contribute to best practices and documentation • Collaborate with development and DevOps teams on data modeling, release management and integration Requirements • 6+ years of hands-on experience as a MongoDB DBA managing large and critical production environments • Deep understanding of MongoDB internals such as replication internals, sharding architecture, chunk migration, balancer tuning and WiredTiger storage engine • Expertise in performance tuning, analyzing execution plans and optimizing queries and indexes • Hands-on experience with replica set and sharded cluster problem diagnosis and resolution • Solid knowledge of Linux, scripting (Shell or Python) and automation frameworks • Experience with monitoring and observability tools for MongoDB • Basic knowledge of at least one additional RDBMS such as Oracle, MS SQL, PostgreSQL or MySQL Nice to have • Strong experience with GCP, AWS or Azure cloud database services • Hands-on experience with MongoDB Atlas, multi-cloud clusters, encryption-at-rest and security controls • Exposure to Kafka, microservices and high-volume data streaming workloads • Experience building internal tooling or automation for database deployment and monitoring • Knowledge of Infrastructure-as-Code such as Terraform or Ansible We offer/Benefits We gather like-minded people: • Engineering community of industry professionals • Friendly team and enjoyable working environment • Flexible schedule and opportunity to work remotely within Poland • Chance to work abroad for up to 60 days annually • Business-driven relocation opportunities We provide growth opportunities: • Outstanding career roadmap • Leadership development, career advising, soft skills, and well-being programs • Certification (GCP, Azure, AWS) • Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru • English classes We cover it all: • Stable income (Employment Contract or B2B) • Participation in the Employee Stock Purchase Plan • Benefits package (health insurance, multisport, shopping vouchers) • Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more • Referral bonuses • Corporate, social and well-being events Please, 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.