Backend Engineer (Ruby/Kotlin)

TL;DR

Backend Engineer (Ruby/Kotlin): Maintaining and evolving a mission-critical Ruby on Rails monolith and developing new features in Kotlin/Spring Boot with an accent on architectural complexity and system integration. Focus on solving complex technical challenges, ensuring seamless interoperability between legacy and modern services, and contributing to a high-impact SaaS platform.

Location: Must be based in Hungary (Remote or hybrid in Budapest).

Salary: 1.5M–1.9M HUF gross/month.

Company

A global provider of learning and development software helping organizations build thriving work cultures.

What you will do

• Maintain and evolve a large-scale Ruby on Rails monolith.
• Develop REST APIs using Kotlin and Spring Boot.
• Ensure seamless integration between legacy Ruby code and modern services.
• Solve complex architectural issues and fix critical bugs.
• Collaborate with a global team across multiple time zones.
• Utilize AI tools to accelerate development and system mapping.

Requirements

• Must be based in Hungary.
• Strong experience with Ruby on Rails and Java/Kotlin Spring Boot.
• Proficiency with PostgreSQL and cloud-based infrastructure (AWS).
• Analytical mindset for navigating large, complex codebases.
• Comfortable with occasional late afternoon/evening CET meetings to overlap with US time zones.
• Direct communication style and ability to engage in constructive technical debate.

Nice to have

• Experience with React and TypeScript.
• Familiarity with Apache Pulsar, AWS Neptune, or OpenSearch.
• Experience with DevOps practices including Terraform and CI/CD pipelines.

Culture & Benefits

• Async, trust-based culture with no micro-management.
• Complete freedom to structure your own workday.
• Comprehensive healthcare package via Medicover.
• SZÉP card and additional fringe benefits.
• Performance-based company bonus.
• Access to elite mentorship from Guild Leads and long-time contributors.