Senior Software Engineer - C Programmer

About the role

Fivetran is seeking a Senior Software Engineer to join its core team and help evolve the high‑performance extract‑load‑transform (ELT) system that powers data pipelines for thousands of customers. You will work on the technical foundation of the product, tackling challenges around relational semantics, data representation, and software performance.

Key responsibilities

• Design and implement core components of the ELT data integration platform.
• Optimize performance of data pipelines and ensure scalability.
• Collaborate with engineering teams to build and maintain hundreds of data connectors.
• Reason about relational semantics and create powerful abstractions for data handling.
• Measure, benchmark, and iterate on production systems to maintain reliability.

Required profile

• Senior‑level software engineer with experience on high‑impact, production‑grade systems.
• Comfortable making decisions in ambiguous environments and building consensus.
• Practical, decisive, and humble enough to gather diverse input.
• Strong problem‑solving mindset with a focus on performance and reliability.

Required skills

• C programming
• Relational database concepts
• ETL / data integration pipelines
• Performance profiling and optimization
• Software design and architecture