We are a global OSINT company headquartered in the US, empowering investigators and security professionals with cutting-edge AI-powered products. Our technology collects and analyzes massive volumes of data from open sources including social media, messengers, and the dark web – to create a comprehensive picture for data-driven investigations and decision-making.

Our customers include S&P 500 companies and law enforcement agencies in 80+ countries worldwide. Social Links is scaling rapidly, growing 2x annually, with the ambition of becoming a unicorn valued at $1B+.

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.

Your Tasks Will Be

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

What We’re Looking For

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

What We Offer

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

We are an equal-opportunity employer and are committed to fostering a diverse and inclusive environment for all candidates.