SI

Senior Software Engineer | Database Engine

SingleStore
Lisbon, Portugalfull_timePosted 15 Jul 2026

About the role

<p><strong>Position Summary</strong></p> <p>SingleStore engineers build the real-time data platform that enables some of the world’s most demanding applications. Our cloud-native database architecture enables high-performance transactional and analytical workloads at scale.</p> <p>Our Software Engineers work on small, collaborative teams to help drive our company forward.  Whether you’re improving the fault tolerance of a SingleStore cluster, accelerating the performance of SQL queries with techniques like SIMD vectorization and LLVM codeGen, or writing search and costing modules for the query optimizer, our engineers are responsible for building systems critical to high performance workloads.</p> <p>Note: This role is open across multiple levels. Final leveling (Senior, Staff, or Principal) will be determined based on experience, scope of impact, and demonstrated technical leadership throughout the interview process.</p> <p><strong>What you'll do:</strong></p> <ul> <li>Develop database engine features based on company direction and customer requests to ensure that requirements are met in a timely manner </li> <li>Deliver bug-free code in a low-level, unmanaged memory C++ environment</li> <li>Translate high-level customer requirements into actionable and deliverable software features</li> <li>Learn, propose, and adapt cutting-edge technologies from across industry and academia into SingleStore’s database architecture for ensuring optimal performance and throughput for customer workloads in both analytical and transactional scenarios</li> <li>Design and execute comprehensive test plans to evaluate database engine functionality, ensuring thorough coverage and accuracy, using Python, C++, and SQL</li> <li>Use low-level debugging techniques including GDB and Flame graphs to fix  problems and improve performance</li> <li>Work on distributed systems algorithms and problems/components of core database engine behind SingleStore</li> <li>Take part in code reviews and design reviews for the purpose of software quality assurance</li> </ul> <h4><strong>Your Experience</strong></h4> <ul> <li>4+ years of experience developing and debugging system-level software in unmanaged languages like C++ or Rust</li> <li>Bachelor’s degree in Computer Science or equivalent practical experience.</li> <li>Demonstrated ability to design and build highly reliable, high-performance system software.</li> </ul> <p><strong>Preferred Qualifications</strong></p> <ul> <li>Knowledge of database architecture and operating systems</li> <li>Familiarity with distributed systems managed via Kubernetes</li> </ul> <hr> <p><stron

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Source: Posted via Greenhouse
Last confirmed active: 25 Jul 2026

Company

SingleStore

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