Senior Backend Engineer - Affiliate Marketing Software
New
EuropeFull-TimeSenior
SalaryAt least 5500 EUR per month
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Job Details
- Experience
- 5+ years
- Required Skills
- PostgreSQLPythonSQLRuby on RailsTypeScriptRESTful APIsBigQuery
Requirements
- 5+ years of backend engineering experience
- Strong proficiency in Ruby on Rails, or solid Python/TypeScript skills with a genuine willingness to learn
- Strong SQL skills, including writing complex queries, optimizing slow queries
- Experience working with PostgreSQL and BigQuery in production environments
- Experience building and maintaining REST APIs and background job systems (e.g., Sidekiq, Celery, or similar)
- Understanding of reliability, retries, and failure handling in background job systems
- Experience building internal tooling and dashboards, ideally tied to financial or affiliate data
- Async-first, high-ownership work style
- Comfortable communicating through written updates
- Making independent decisions and taking full responsibility for features
- Practical experience using AI-assisted development tools (such as Cursor, Claude Code, GitHub Copilot, or similar)
Responsibilities
- Build and maintain backend features - APIs, background jobs, integrations
- Improve and maintain our data pipeline - write reports and queries in PostgreSQL and BigQuery to keep affiliate data correct and up to date
- Build internal dashboards and reports - payout summaries, revenue attribution, cohort breakdowns, etc.
- Fix performance issues - bad queries, slow background jobs, bottlenecks
- Use AI tools (Claude Code, Cursor) daily to move faster
- Work async with a small team - few meetings, lots of ownership
- Jump in on technical support - running custom scripts, debugging client-specific issues, or digging into the data
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