Join our team as a Senior Java Developer and play a key role in designing, building, and optimizing the core components that power large-scale, data-intensive workloads. You will own critical parts of our distributed execution, storage, and data service layers — driving low latency, high throughput, and cost-efficient solutions.In this role, you’ll collaborate closely with data engineers, data scientists, architects, and product owners to deliver robust, observable, and operable systems. Your work will enable reliable ingestion, processing, and serving of data across the organization, fueling insights and innovation while maintaining efficiency and scalability.Responsibilities Design and maintain robust large-scale data processing and analytics solutions Optimize ETL pipelines for handling diverse data types Enhance system reliability using observability frameworks Leverage distributed computing, storage, and streaming services to achieve scalable solutions Improve performance-critical data operations like serialization, scheduling, and caching Apply columnar and binary formats (Parquet, ORC, Arrow) for efficient data processing Tune and profile JVM performance using tools such as JFR/JMC and GC tuning Support DevOps workflows, including CI/CD automation and containerized deployments with Docker, Kubernetes, and Azure DevOps Review code, develop automated tests, and ensure strong documentation practices Guide junior engineers and uphold high engineering standards Requirements 5+ years of experience in software engineering, emphasizing data-intensive systems Knowledge of Java and other JVM-based technologies Background in using the JMH Framework Skills in SQL and time-series databases such as InfluxDB and Redis Proficiency in containerization technologies like Docker and Kubernetes and familiarity with Azure Cloud Competency in DevOps practices and Linux system administration Expertise in concurrency, parallelism, and optimizing performance for data pipelines Nice to have Familiarity with monitoring tools such as OpenTelemetry, Grafana, Prometheus, or Splunk Background in Python, Kotlin, or additional JVM-based technologies Databricks certification We offer 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.