[Hiring] Software Engineer in Test (Python / Backend) @Social Links LLC

Role Description

We are looking for a hands-on Software Engineer in Test (Python / Backend) to own the test infrastructure of our distributed multi-tenant platform – not just writing tests, but architecting the entire automation layer that ensures reliability across a complex, multi-service environment.

• 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

Qualifications

• 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

Requirements

• 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