Ruby on Rails Developer

stermedia.ai; Poland; Remote; PLN 120,000 - 180,000; Full time

Job summary

stermedia.ai is looking for a backend developer to join our small team and help build our SaaS platform for factories. You will focus on the Ruby on Rails backend, implement a GraphQL API, data models, and an admin panel with the team.

You will design and ship new features, maintain production stability, and integrate with external systems and devices in a fully remote setting from Poland. We value proactive problem solving and independence.

Qualifications

• Fundamentals of Ruby on Rails and familiarity with its conventions.
• Ability to learn quickly and solve problems independently.
• Willingness to understand client problems, not just tickets.
• Attention to code quality and curiosity about system integration.
• Comfort with working with LLMs and coding agents as everyday tools.

Responsibilities

• Developing the backend — business logic, GraphQL API, data models and admin panel.
• Designing and implementing new system features with the team.
• Maintaining a live product — monitoring, fixes and production stability.
• Debugging and solving client-reported issues.
• Integrating with external systems and industrial devices.

Skills

Ruby on Rails

GraphQL

PostgreSQL

Redis

Resque

ActiveAdmin

Pundit

RSpec

Tools

Docker

Job description

About the product

AndonCloud is a SaaS system for factories that combines Andon, MES, CMMS, HMI, and BI functionality. It enables real-time production monitoring, as well as management of orders, workstations, machine statuses, KPIs, and reports.

About us

We are building our own product — we are not a software house. We are a small team with a short path from idea to implementation. Your technical decisions have a real impact on the product and on the everyday work of people in factories. We do not focus on years of experience; what matters is being capable, proactive, and able to solve problems independently.

Stack

• Ruby / Ruby on Rails
• GraphQL — API for frontend applications
• PostgreSQL, Redis
• Resque — background jobs
• ActiveAdmin — admin panel
• Pundit — RBAC
• RSpec
• Docker

Nice to have

• Experience with industrial systems / IIoT / MQTT
• Basic frontend knowledge — JS, React
• Basic DevOps awareness — CI/CD, Kubernetes

Expectations

• Fundamentals of Ruby on Rails and familiarity with the framework’s conventions — you will refine the rest with us.
• Ability to learn quickly.
• Willingness to understand the client’s problem, not just implement tickets.
• Attention to the quality of the code you write.Curiosity about how different parts of the system are connected.
• Openness to working with LLMs and coding agents as everyday tools.

What you will be doing

• Developing the backend — business logic, GraphQL API, data models, and the admin panel.
• Designing and implementing new system features together with the team.
• Maintaining a live product — monitoring, fixes, and ensuring production stability.
• Debugging and solving issues reported by clients.
• Integrating with external systems and industrial devices.

Work model

• 100% remote from anywhere in Poland.
• Flexible working hours.
• Work in a product team.