Advanced Software Engineer (.NET)

Relativity; Kraków; Hybrid; PLN 160,000 - 240,000; Full time

Benefits offered by this job

Competitive salary

Equity program

Parental leave

Job summary

Relativity in Kraków seeks an Advanced Software Engineer (.NET) to design and build cloud-native storage capabilities powering RelativityOne. You will develop backend API-first services in C#/.NET focused on reliability, scalability, security, and performance, leveraging Azure Blob Storage and Cosmos DB.

You’ll evolve multi-tenant storage patterns, lifecycle management, and cost optimization, implement gRPC communication, participate in architecture reviews, and drive operational excellence

Qualifications

• 3+ years of backend services or data/platform engineering experience.
• Strong C#/.NET (Core) development skills.
• Experience designing cloud-native storage solutions in Azure with Blob Storage and Cosmos DB.
• Experience with CI/CD practices and Agile methodologies.
• Fluent English communication, written and spoken.

Responsibilities

• Design, build, and operate backend services for unstructured storage in RelativityOne using C#/.NET.
• Implement Azure-based storage solutions, including Blob Storage and Cosmos DB, with lifecycle policies and multi-tenant isolation.
• Design inter-service communication using gRPC and REST APIs.
• Lead design reviews and promote cloud-native storage patterns across teams.
• Troubleshoot production issues and drive reliability improvements through instrumentation and automation.
• Collaborate with product engineering, SRE, and security to deliver end-to-end solutions.
• Participate in on-call rotations to maintain service health.

Skills

C#/.NET

Backend services

Distributed systems

CI/CD (GitHub Actions)

Agile methodologies

English communication

Tools

Azure

Blob Storage

Cosmos DB

gRPC

Job description

***Job Overview***WHO WE ARE Relativity is a leading legal data intelligence company building technology that helps users organize data, discover the truth, and act on it with confidence. Our AI-powered, cloud platform, RelativityOne, transforms massive volumes of complex information into actionable insights for litigation, investigations, regulatory inquiries, data breach responses, and other high-stakes legal work where accuracy and trust are crucial. The world’s largest law firms, corporations, and government agencies rely on Relativity’s legal AI software to securely surface and manage the most relevant and impactful information in their matters. Beyond our commercial impact, we are committed to expanding access to technology and supporting pro bono legal work. WHAT WE DO The Unstructured Storage Services team is part of Data Intelligence Foundation and is responsible for delivering core data capabilities that power RelativityOne. The team provides self-serve, reliable unstructured storage services for product engineering teams and external customers, enabling teams to move faster without rebuilding storage, reliability, and operational tooling. The team designs and operates cloud-native storage capabilities built on Azure technologies, partnering closely with product engineering, SRE, operations, and security teams to improve developer experience, reduce operational burden, and deliver scalable platform services. ABOUT THE ROLE As an Advanced Software Engineer (.NET) on the Unstructured Storage Services team, you will design and build cloud-native storage capabilities that power RelativityOne. You will develop backend API-first services that are scalable, resilient, secure, and cost-aware while leveraging Azure storage technologies such as Blob Storage and Cosmos DB. You will help evolve shared storage platform capabilities that support multi-tenancy, lifecycle management, performance optimization, and operational excellence across Relativity's cloud platform.***Job Description and Requirements*****WHAT YOU’LL DO** * Design, build, and operate backend services for unstructured storage in RelativityOne using C#/.NET with a focus on reliability, scalability, security, and performance.* Implement and evolve Azure-based storage solutions, including Blob Storage and Cosmos DB, with lifecycle policies, multi-tenant isolation, access controls, and cost optimization.* Design and implement service-to-service communication using gRPC, including Protocol Buffers, contract versioning, streaming, deadlines, retries, and REST APIs.* Lead and participate in technical design reviews, document architectural decisions, and promote cloud-native storage patterns across engineering teams.* Troubleshoot and resolve production issues, identify reliability and performance risks, and drive operational improvements through instrumentation, automation, and enhanced playbooks.* Contribute to the storage platform roadmap by evaluating technologies and recommending improvements aligned with business objectives and long-term platform evolution.* Collaborate with product engineering, SRE, and security teams to deliver solutions end-to-end and improve developer experience.* Participate in on-call rotations and incident response activities to maintain service health and support customers. **WHAT WE’RE LOOKING FOR** **Required*** 3+ years of software engineering experience in backend services, distributed systems, or data/platform engineering.* Strong C#/.NET (Core) development skills.* Hands-on experience designing and implementing cloud-native storage solutions in Azure, AWS, or GCP, with Azure preferred.* Understanding of distributed storage fundamentals, including partitioning, consistency models, data access patterns, and performance optimization.* Experience with CI/CD practices and tools such as GitHub Actions and deploying production services.* Fluent English with strong written and verbal communication skills.* Experience working within Agile methodologies such as Scrum or Kanban. **Preferred*** Experience with Azure Blob Storage and Cosmos DB.* Experience designing and implementing gRPC services and distributed service communication.* Experience with multi-tenant platforms, storage lifecycle management, and access control models.* Familiarity with service observability, operational excellence, and incident response practices.* Experience optimizing large-scale storage systems for performance, reliability, and cost efficiency. **WHY WE COULD BE A GREAT FIT** Impactful Mission* Build systems that help customers organize data, discover the truth, and act on it in high-stakes legal matters.Engineering at Scale* Work on distributed, cloud-native systems that process large volumes of data.Cutting-Edge Technology* Build with AI, cloud platforms, and scalable architectures shaping legal tech.Growth and Ownership* Gain experience owning systems end-to-end across cloud and distributed environments.Collaborative Culture* Work in a team focused on knowledge sharing and continuous improvement.Inclusive Environment* Diverse perspectives create stronger teams and better outcomes.Compensation and Benefits* Competitive salary, benefits, DTO, parental leave, and equity program.**Relativity is committed to competitive, fair, and equitable compensation practices.**This position is eligible for total compensation which includes a competitive base salary, an annual performance bonus, and long-term incentives.The expected salary range for this role is between following values:160 000 and 240 000PLNThe final offered salary will be based on several factors, including but not limited to the candidate's depth of experience, skill set, qualifications, and internal pay equity. Hiring at the top end of the range would not be typical, to allow for future meaningful salary growth in this position. **Required Skills:**Engineering Principle, Hardware Integration, Innovation, Problem Solving, Process Improvements, Quality Assurance (QA), Research and Development, System Designs, Technical Documents, Troubleshooting