Find a jobRecruiters

QA Engineer (AI + Python)

Exclusive opportunity

Remote

QA Engineer (AI + Python)

testerzy.pl

QA Engineer (AI + Python)

Skills

Mobile DevelopmentNestReactNodePythonIOSReact NativeTesting & QAPostmanSwagger/OpenAPIAI

4 days ago

Share this opportunity

Share this opportunity to other talents of your network:
✓ Offer them a visibility boost with clients.
✓ Help your contacts find their next job.

Important information


Contract type:

Permanent

Location:

Warsaw, Poland

Work mode:

Remote

Published on:

17 October 2026

What they need


Czym będziesz się zajmować?

Role summary: Own quality on the two hardest surfaces of a production AI coaching platform:

the LLM agents that answer differently every run, and the API layer everything else depends on.

As AI & Backend QA Engineer you own the quality of what the model says and what the APIs return. On the AI side that means building the evaluation practice: golden sets, quality metrics, and regression detection that catch a degraded answer before a user does. On the backend side it means API test suites and consumer-driven contract testing with Pact — agreed with the client's US engineering team as a standing requirement for this role, not an optional technique.

The defining skill is localization: when an answer is wrong, you can tell whether the problem sits in the model, in the service code, or in the input data — and you bring the evidence, not a guess.

What you'll be testing:

  • AI core — a Python service with LangGraph agents producing streaming, non-deterministic coaching responses; this
  • role's primary surface
  • Backend APIs — a NestJS REST gateway behind Auth0, plus the services behind it
  • Mobile app — React Native, shipping to iOS and Android app stores; AI features surface directly in the app that
  • members use

Kogo poszukujemy?

Must-have skills:

  • 3+ years in technical QA/test automation, incl. API testing on production
  • Python — writing/maintaining tests, pytest, fixtures
  • HTTP/API fundamentals — REST, JSON, status codes, headers, auth tokens
  • Contract testing with Pact — consumer-driven contracts (hard requirement)
  • Security-aware API testing — auth boundaries, token handling, malformed/hostile input
  • Comfort with non-determinism — assert on properties/contracts, not exact output
  • LLM evaluation — datasets/golden sets, response metrics, detect regressions across prompts/models
  • Prompt engineering — modify prompts and measure effects; aware of hallucinations and prompt injection
  • Backend savvy — HTTP/REST, JSON, tokens, logs, DB queries; isolate model vs service vs input issues
  • Postman and Swagger/OpenAPI daily
  • Git in team workflow — branches, PRs, reviews
  • TestRail for test-case management and runs
  • Mobile product context (Android/iOS) — testing app features, release timing, store builds

Nice-to-haves:

  • Langfuse or equivalent (LangSmith, Phoenix) — traces and attached evaluations
  • LangGraph — test agents as state graphs (single node and full flow)
  • CI/CD — run evaluations in pipelines and quality gates on PRs
  • Python with Appium — mobile automation exposure alongside API work

Czego wymagamy?

5 lat doświadczenia na podobnym stanowisku

Znajomości:

  • Python
  • REST
  • Zendesk
  • Security testing
  • LLM
  • Inżynieria promptów

Mile widziane:

  • Postman
  • OpenAPI
  • Git
  • TestRail
  • Mobile applications testing
  • Logs and tracing

Języki:

  • Polski
  • Angielski
  • Langfuse (mile widziane)

Jakie warunki i benefity otrzymasz?

  • 25.2k–28.6k PLN netto/m (B2B)
  • B2B - Overlap with US Mountain Time afternoons (~14:00–18:00 PL time) (100%)
  • Praca zdalna: W całości
  • Pakiet medyczny, Pakiet sportowy

Kim jesteśmy?

apreel został założony w kwietniu 2010 roku przez przyjaciół, których marzeniem było stworzenie własnego software house'u. Wraz z rozwojem firmy i jednocześnie wzrostem zaufania klientów, rozszerzyła swoją działalność o usługi takie jak leasing ekspertów IT. Dziś ten obszar stanowi główny filar działalności apreel.

Nie oznacza to jednak, że założyciele apreela porzucili swoje marzenia. Naszą pasją zawsze będzie tworzenie autorskich rozwiązań informatycznych, a celem, do którego dążymy, jest ciągłe ich doskonalenie. W połączeniu z wyjątkową atmosferą i profesjonalizmem stworzyliśmy w apreelu wyjątkowy klimat.

Zapraszamy do aplikowania, jeżeli zależy Ci na pracy wśród dobrych specjalistów, w stabilnych organizacjach oraz z jasnymi warunkami finansowania.

Other offers great for you!

These companies are also looking for great profiles

Celad

Ingénieur QA et Automatisation

40 000 à 48 000

Permanent contract

Nice, France

Hybrid

Skills

JavaTesting & QAPostman

5 months ago

Quick apply

Celad

Ingénieur QA

38000 à 44000

Permanent contract

06410 Biot, France

Hybrid

Skills

QA Engineer

5 months ago

Quick apply

Visian

Ingénieur QA web/api/mobile

440

Freelance

Paris, France

Hybrid

Skills

Testing & QAPostmanbrunoappium

2 months ago

Quick apply

The best place to find your next move

© 2026. All Rights Reserved.

Talents

Find a job

Create a profile

Solutions and tools