Backend Engineer - Go & Data Platform (Junior/Mid)

JobCubby; Kraków; On-site; PLN 180,000 - 240,000; Full time

Job summary

Sensor Tower is hiring for an early‑career backend engineer to join a fast-paced data platform team. You’ll contribute from day one, building features for AppMagic and learning how large-scale systems are designed and operated.

You’ll work with Go, PostgreSQL, ClickHouse, and other tech, collaborating across design, implementation, and release, while growing in a supportive culture that values ownership and continuous learning.

Qualifications

• +2 years of experience with Go and building backend services.
• Strong SQL skills (Postgres/ClickHouse) and ability to write complex queries.
• Commitment to testable, maintainable code and long-term reliability.
• Ability to see the product through the user’s eyes and deliver value.
• Curiosity, proactivity, and ability to learn quickly in a fast-paced environment.
• Experience with CI/CD, Docker, and Kubernetes is a plus.
• Ability to pass technical interviews in Russian and English.
• Hands-on, thoughtful use of AI tools in development.

Responsibilities

• Improve and build features for a market intelligence SaaS platform (AppMagic by Sensor Tower).
• Participate in design, implementation, QA, and release cycles.
• Work on parsing, data aggregation, API design, refactoring, and performance optimization.
• Create and optimize complex database queries for data analysis.
• Perform code reviews and suggest tooling/process improvements.

Skills

Go

SQL

CI/CD

Docker

Kubernetes

Russian

English

Tools

PostgreSQL

ClickHouse

Elasticsearch

MongoDB

RabbitMQ

GitLab

Job description

Sensor Tower is hiring for an early‑career backend engineer to join a fast-paced data platform team. You’ll contribute from day one, building features for AppMagic and learning how large-scale systems are designed and operated.

You’ll work with Go, PostgreSQL, ClickHouse, and other tech, collaborating across design, implementation, and release, while growing in a supportive culture that values ownership and continuous learning.