Senior Backend Engineer (Ruby on Rails)

TL;DR

Senior Backend Engineer (Ruby on Rails): Developing and maintaining backend features and data pipelines for an affiliate marketing SaaS product with an accent on API design and data reliability. Focus on optimizing PostgreSQL/BigQuery queries, building internal business dashboards, and leveraging AI-assisted development tools to accelerate shipping.

Location: Remote (Must be based in Europe)

Salary: from €5,500 gross/month

Company

hirify.global (SpringWater team) is a small international team focused on scaling a strong SaaS product in the affiliate marketing software space.

What you will do

• Build and maintain backend features, including APIs, background jobs, and integrations.
• Improve and maintain data pipelines using PostgreSQL and BigQuery to ensure accurate affiliate data.
• Develop internal dashboards for revenue attribution, payout summaries, and cohort breakdowns.
• Identify and fix performance bottlenecks and optimize slow database queries.
• Work asynchronously with a small team, taking full ownership of features from build through monitoring.
• Provide high-level technical support by running custom scripts and debugging client-specific issues.

Requirements

• 5+ years of backend engineering experience.
• Strong proficiency in Ruby on Rails, or solid Python/TypeScript skills with a genuine willingness to learn the stack.
• Advanced SQL skills for writing and optimizing complex queries in production PostgreSQL and BigQuery environments.
• Experience building REST APIs and background job systems (e.g., Sidekiq, Celery).
• Experience creating internal business-facing data products and reports.
• Must be based in Europe.

Nice to have

• Background in data or analytics engineering, specifically with event tracking or conversion data.
• Familiarity with dbt (data build tool) for maintaining data transformation models.

Culture & Benefits

• Remote-first setup providing high autonomy and flexibility over where and how you work.
• High-impact ownership within a small team with a flat organizational structure.
• Direct access to decision-makers and the ability to influence product direction.
• Dedicated learning budget for professional growth.
• Async-first work culture designed to minimize meetings and maximize doing.