Senior Backend Engineer | SpringWater team | Based in Europe

Hostinger

5d•Remote

About The Position

SpringWater is seeking a Senior Backend Engineer to join their team. This role is with an acquired company in the affiliate marketing software space, which operates as a small, international team focused on transforming a strong SaaS product into a growth machine. The ideal candidate is self-driven, reliable, and understands that a great product experience is a key growth driver. The engineer will work closely with the CTO and product team to ship features efficiently, with an emphasis on 'doing' over 'meeting'.

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.
Strong SQL skills, including writing complex queries, optimizing slow queries, and working with PostgreSQL and BigQuery in production environments.
Experience building and maintaining REST APIs and background job systems (e.g., Sidekiq, Celery, or similar), with an understanding of reliability, retries, and failure handling.
Experience building internal tooling and dashboards (e.g., revenue reports, payout summaries, cohort analyses) tied to financial or affiliate data.
Async-first, high-ownership work style, comfortable with written communication, independent decision-making, and full feature responsibility (build through monitoring).
Practical experience using AI-assisted development tools (e.g., Cursor, Claude Code, GitHub Copilot) as a regular part of the development workflow.

Nice To Haves

Data or analytics engineering background, with prior work in data pipelines, event tracking, affiliate/conversion data, or analytics engineering.
Familiarity with dbt (data build tool) for data transformation models, or a strong desire to learn it quickly.

Responsibilities

Build and maintain backend features, including APIs, background jobs, and integrations.
Improve and maintain the data pipeline, writing reports and queries in PostgreSQL and BigQuery to ensure affiliate data accuracy.
Build internal dashboards and reports for metrics like payout summaries, revenue attribution, and cohort breakdowns.
Fix performance issues, including optimizing queries, background jobs, and addressing bottlenecks.
Ensure systems run well under load.
Utilize AI tools daily to increase speed and efficiency.
Work asynchronously with a small team, taking ownership from development through monitoring.
Participate in technical support rotation, assisting the CX team with deeper technical help, running scripts, debugging client issues, and data analysis.