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.

Responsibilities

• Provide end-to-end support for Cosmos DB–based databases, including monitoring, troubleshooting, and performance tuning

• Work 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 Fabric

• Diagnose and resolve production issues related to data access, latency, throughput, and availability

• Implement best practices for scalability, security, backup, and disaster recovery

• Collaborate with application, data engineering, and platform teams to support data-driven solutions

• Contribute to automation, scripting, and operational improvements

• Participate in on-call or production support rotations as required

• Document operational procedures and support knowledge base

Requirements

• 5+ years of experience as a Data Engineer or in a similar role

• Strong hands-on experience with Cosmos DB, including its NoSQL API and data variants

• Expertise in managing data platforms hosted on Azure, including Azure Fabric

• Solid understanding of NoSQL data modeling, partitioning techniques, and performance optimization

• Competency in troubleshooting production database issues in cloud environments

• Proficiency in Azure tools and services for monitoring and management

• Strong troubleshooting and analytical skills

• Calm, methodical approach to production support and incident management

• Good communication skills, ability to work with both technical and non-technical stakeholders

• Ability to prioritize effectively in high-availability environments

• Collaborative mindset and ownership mentality

• Excellent written and verbal communication skills in English (B2+ level)

Nice to have

• Experience with code generation, including non-AI and AI-assisted approaches

• Exposure to Data Science workflows

• Experience with Big Data platforms and distributed systems

• Knowledge of financial instruments and financial services data

• Hands-on experience with industry-standard LLMs (including GPT, Claude, or similar)

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.