CareerPlan

Ruby on Rails Developer - Senior

Warszawa, PLFull-time2026-09-21 → 2026-11-10

Core

Design and build reliable, fault-tolerant, scalable Ruby services for high-load, data-intensive systems.

Role type

Senior Ruby on Rails Developer (Data-intensive systems)

Builds

Scalable Ruby services and data-intensive applications

Domain

Software Engineering / Data Systems

Deliverable

production ML models | product features

Required skills

Ruby, SQL, relational databases, data structures, OOP, algorithms, performance tuning, root-cause analysis

Preferred skills

ClickHouse, Kafka, SRE practices, cloud native technologies (k8s, Helm, Prometheus), Golang, Scala

Technologies

Ruby, SQL, ClickHouse, Kafka, k8s, Helm, Prometheus, Golang, Scala

Responsibilities

Design fault-tolerant, highly available solutions; Monitor and optimize services in production; Research and develop new technologies and tools; Collaborate with product, infrastructure, and business teams

Seniority

Senior, hands-on IC