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Senior Backend Developer
  • Warszawa
Senior Backend Developer
Warszawa, Warszawa, mazowieckie, Polska
Square One Resources Sp. z o.o.
20. 6. 2025
Informacje o stanowisku

Senior Backend Developer



Your responsibilities

  • Own and extend our Django 4 + GraphQL API (Python 3.12).
  • Build the hand-parser, scoring logic, XP/level engine and leaderboard service.
  • Add notification pipelines (in-app, e-mail, push via AWS SNS).
  • Customise Django Admin for content import and user moderation.
  • Help shape our AWS infrastructure (ECS Fargate, RDS PostgreSQL, S3) using Terraform and GitHub Actions CI/CD.
  • Write robust tests with pytest, keep p95 responses < 200 ms, and participate in rigorous code reviews.

Our requirements

  • 5 years of experience
  • Production experience with Python/Django.
  • Strong SQL skills and performance tuning.
  • Proven REST/GraphQL API design and test automation.
  • Comfortable with Docker and CI/CD workflows.
  • Gamification or ed-tech background, AWS CDK, basic TypeScript familiarity

 

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