Go Backend Engineer for Scalable Data SaaS

JobCubby; Kraków; On-site; PLN 150,000 - 210,000; Full time

Job summary

Sensor Tower in Kraków is seeking a backend engineer to help build fast, reliable systems for a market intelligence SaaS platform. You’ll work with Go, SQL, and our data-heavy stack across design, implementation, and production optimization.

You’ll contribute from day one, participate in full development life cycle, and tackle parsing, data aggregation, API design, and performance improvements. Collaboration with experienced engineers and QA is expected, with emphasis on quality and ownership.

Qualifications

• 3+ years of backend Go experience with a strong focus on performance and reliability.
• Strong SQL skills (Postgres/ClickHouse) and ability to write complex queries.
• Commitment to testable, maintainable code and ownership of fixes.
• Ability to see the product through user’s eyes and ship high-quality features.

Responsibilities

• Improve and build new features for a market intelligence SaaS platform.
• Participate in full development life cycle: design, implement, polish, release.
• Work on parsing, data aggregation, API design, refactoring, and performance optimization.
• Create and optimize complex database queries for data analysis.

Skills

Go programming

SQL

Testing/quality code

CI/CD

AI tools in development

Docker/Kubernetes

Product/data mindset

Tools

PostgreSQL

ClickHouse

MongoDB

Elasticsearch

RabbitMQ

GitLab

Docker

Kubernetes

Job description

Sensor Tower in Kraków is seeking a backend engineer to help build fast, reliable systems for a market intelligence SaaS platform. You’ll work with Go, SQL, and our data-heavy stack across design, implementation, and production optimization.

You’ll contribute from day one, participate in full development life cycle, and tackle parsing, data aggregation, API design, and performance improvements. Collaboration with experienced engineers and QA is expected, with emphasis on quality and ownership.