Blockchain QA Engineer — Automation & Security Focus

Halborn; Miami (FL); On-site; USD 90,000 - 130,000; Full time

Job summary

Halborn, a leading blockchain security company, is seeking a QA Engineer/SDET to help safeguard our internal engineering platforms and client-facing products. You will own test strategy, design and maintain automated UI/API/data-layer suites, and use AI-assisted tooling to accelerate coverage.

You will collaborate with security engineers to embed regression checks, automate release checklists, and report key quality metrics while working in a globally distributed team.

Qualifications

• 3 to 5 years in QA engineering, with automated coverage.
• Strong programming in TypeScript, JavaScript, or Python.
• Experience with modern automation frameworks such as Playwright, Cypress, Selenium, pytest.

Responsibilities

• Own the test strategy for Halborn's internal engineering platforms and client-facing products, from unit and integration coverage through end-to-end and regression suites.
• Design, build and maintain automated test suites in code - UI, API, and data-layer - and keep them fast, deterministic, and trusted by the engineers who depend on them.
• Use LLM-assisted tooling to accelerate test authoring, generate edge cases from specs and diffs, triage failing runs, and summarize regressions for the team.
• Build and tune quality gates in CI/CD so that broken builds never reach a client environment, and so that the feedback loop stays measured in minutes.
• Identify manual QA processes and automate them out of existence - release checklists, environment setup, test data generation, smoke verification, reporting.
• Reproduce, isolate, and file defects with unambiguous repro steps, expected versus actual behavior, and enough context for an engineer to fix it without a follow-up conversation.
• Partner with security engineers to fold security regression checks - authentication, authorization, input handling, secrets exposure - into the standard pipeline.
• Run performance, load, and reliability testing against services handling sensitive audit and engagement data.
• Define and report the quality metrics that matter: escaped defect rate, flake rate, coverage of critical paths, and time to detection.
• Contribute to release readiness decisions and act as an informed voice on whether something ships.

Skills

QA Automation

SDET Experience

TypeScript/JS

Python

Playwright

Cypress

API Testing

CI/CD

AI-assisted Testing

Git & Containers

Tools

Playwright

Cypress

Selenium

pytest

Git

Docker

Job description

Halborn, a leading blockchain security company, is seeking a QA Engineer/SDET to help safeguard our internal engineering platforms and client-facing products. You will own test strategy, design and maintain automated UI/API/data-layer suites, and use AI-assisted tooling to accelerate coverage.

You will collaborate with security engineers to embed regression checks, automate release checklists, and report key quality metrics while working in a globally distributed team.