Senior Software Engineer (Java/Scala), Lakehouse Team - Splunk

Cisco Systems, Inc; Kraków; On-site; PLN 140,000 - 240,000; Full time

Job summary

Cisco Systems, Inc. is seeking a senior backend engineer to lead the delivery of federated query and data lake capabilities.

You will design secure, high‑performing distributed systems and drive them from design through testing, release, and production support. You will collaborate with engineering and product partners across teams to refine requirements, evaluate solutions via prototypes, and contribute to the product roadmap.

Qualifications

• Bachelor’s or higher degree with 7+ years of professional software experience.
• Experience with backend software in Java/Scala.
• Experience designing distributed data processing systems.
• Experience delivering features end-to-end and supporting production.
• Experience writing automated tests and using version control with CI pipelines.

Responsibilities

• Lead feature delivery from design to release and operation.
• Design high‑performance distributed systems for data processing.
• Analyze and optimize query performance; troubleshoot production issues.
• Coordinate with teams to refine requirements and manage delivery milestones.
• Mentor engineers and improve development practices through docs.

Skills

Java/Scala

Distributed systems

Automated testing

Code reviews

CI/CD

Education

Bachelor’s degree + 7+ yrs

Master’s degree + 4+ yrs

PhD + 1+ yr

Tools

Git

Apache Spark

Databricks

Job description

Meet the Team

Splunk’s Lakehouse team builds federated analytics capabilities that help customers search and analyze data wherever it resides. Our work extends the Splunk data platform to connect with data lakes and turn distributed data into actionable insights. We are a collaborative, engineering‑ and product‑focused team working across distributed systems, query processing, and cloud services. Join us to tackle challenging data processing problems, shape technical solutions, and deliver capabilities that customers rely on to answer real‑world questions.

Your Impact

Lead the delivery of features from technical design through implementation, release, and ongoing operation to extend Splunk’s federated query and data lake capabilities. Design and build secure, high‑performance distributed systems, contribute to feature threat modeling, and improve code quality through automated testing and thorough code reviews. Analyze and optimize query performance, troubleshoot complex production issues, and lead root cause analysis to improve reliability and the customer experience. Coordinate with engineering and product partners across teams to refine requirements, evaluate solutions through prototypes, manage delivery milestones and risks, and contribute to the product roadmap. Mentor engineers and improve development practices through technical guidance, clear documentation, and knowledge sharing.

Minimum Qualifications

• Bachelor’s degree with 7+ years of related professional experience, master’s degree with 4+ years of related professional experience, or PhD with 1+ year of related professional experience.

• Experience developing production backend software in Java or Scala using object‑oriented or functional programming practices.

• Experience designing distributed systems for large‑scale data processing, including data transformation, query processing, or query optimization.

• Experience delivering software features across technical design, implementation, testing, release, and production support.

• Experience writing automated tests, reviewing code, and using version control and continuous integration pipelines.

Preferred Qualifications

• Experience with Apache Spark, Databricks, or similar technologies for processing large volumes of data.

• Experiencewith query engine internals, such as query planning, execution strategies, indexing, or query optimization.

• Experience applying algorithms and data structures to diagnose and improve query execution performance.

• Experience coordinating technical delivery across teams, communicating tradeoffs, and mentoring engineers.

• Experience leading production incident investigations, postmortems, and reliability improvements.

Why Cisco?

At Cisco, we’re revolutionizing how data and infrastructure connect and protect organizations in the AI era – and beyond. We’ve been innovating fearlessly for 40 years to create solutions that power how humans and technology work together across the physical and digital worlds. These solutions provide customers with unparalleled security, visibility, and insights across the entire digital footprint.

Fueled by the depth and breadth of our technology, we experiment and create meaningful solutions. Add to that our worldwide network of doers and experts, and you’ll see that the opportunities to grow and build are limitless. We work as a team, collaborating with empathy to make really big things happen on a global scale. Because our solutions are everywhere, our impact is everywhere.

We are Cisco, and our power starts with you.