Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics.
Implement, test, deploy, monitor and maintain (in all aspects, including setting up environment, writing configuration code, monitor production) HTTP / gRPC services and batch jobs in Java and Python, ensuring adherence to the high engineering standards.
Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews.

Excellent understanding of how complex IT systems work
from the hardware level, through software, to algorithms.
Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others).
Good knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to geo-distributed clusters level).
Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it).
The ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production).
General knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability'.
C1 level in English and Polish.

Projects focused on extreme performance and high code quality – clean code and solid code reviews are our standard.
Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers).
Access to modern technologies and the opportunity to apply them in large-scale, high-impact projects.
Cooperation based on B2B contract.
You can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow.

Senior Distributed Systems Engineer – Tech Lead

Key skills