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Software Engineer in Test, Python, Backend

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full-time

Posted on:

Location Type: Remote

Location: Serbia

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Job Level

Junior

Tech Stack

Distributed SystemsGoKafkaPythonSQLTypeScript

About the role

  • Designing and building our core test framework architecture from scratch (Python + pytest)
  • Writing API and E2E tests that span multiple services and integration points
  • Verifying data isolation between tenants to ensure no cross-tenant leakage in our multi-tenant platform
  • Managing test data, fixtures, and CI pipeline health – keeping it green and fast
  • Investigating failures end-to-end: reading logs, tracing service behavior, and identifying root causes independently

Requirements

  • Strong hands-on depth in backend/API test automation
  • Proven experience building at least one test framework from scratch: structure, auth/session handling, and CI integration
  • Strong Python proficiency and the ability to read unfamiliar code in Go or TypeScript to understand service logic and debug failures
  • Deep experience testing REST APIs: complex auth flows, schema validation, and edge case coverage
  • A proactive, independent working style – you form hypotheses, dig into logs, and narrow down problems without waiting to be told
  • English – B1 level or higher
  • Nice To Haves
  • Experience testing async and distributed systems: queues, Kafka, eventual consistency
  • Prior work with multi-tenancy and data isolation testing scenarios
  • Ability to set up or tune CI/CD pipelines (GitHub Actions, GitLab CI) from scratch
  • Strong SQL skills for direct database verification and complex data queries
  • Familiarity with evaluating AI/ML system outputs for quality and regressions
  • Security mindset: knowledge of auth bypass, access control, and injection testing
  • Russian – advanced level or higher
Benefits
  • Remote-first setup: work from anywhere in the world (excluding Russia and Belarus)
  • Full ownership of a critical engineering domain with high visibility across the team
  • Work on a fast-growing, internationally recognized product used by law enforcement and Fortune 500 companies
  • A collaborative engineering culture where your architecture decisions have direct, lasting impact
  • Long-term engagement as a core member of the engineering team
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
PythonpytestAPI test automationtest framework architectureGoTypeScriptREST APIsSQLCI/CD pipelinesdata isolation testing
Soft Skills
proactive working styleindependent problem solvinghypothesis formationlog analysisroot cause identification