# Senior Software Development Engineer in Test at DXC Luxoft · Luxoft > Open job at DXC Luxoft · Luxoft. Workplace: Remote (Poland). Source: Poland Dev Jobs, https://poland-devjobs.com/jobs/luxoft-senior-software-development-engineer-in-test-4tz1epf Posted 19 October 2026. Last checked on the employer's career site: 4 November 2026. ## Facts - Company: [Luxoft](https://poland-devjobs.com/companies/luxoft) - Location: Remote (Poland) - Workplace: Remote (Poland) - Employment type: Full-time - Polish: Not required - Skills: AWS, Azure, Cypress, Docker, GitHub Actions, JavaScript, Jenkins, Kafka, Linux, Node.js, Playwright, Python, React, Selenium, TypeScript - Not mentioned in the job post: salary, visa sponsorship, relocation, where you can apply from ## Job description Project description We build an in-house trading platform covering order management, execution, and data analysis. The front end is a set of TypeScript/React apps running in a desktop container and streaming real-time data. We're hiring a hands-on SDET to own UI test automation: extend our Playwright framework, make streaming, multi-window workflows testable, and add quality gates to CI, including front-end performance. You'll co-architect and co-own a unified testing framework with our backend SDET. It covers UI, API, messaging, data and performance tests in one place. Responsibilities - Co-architect and co-own, with our backend SDET, a unified testing framework that covers every area we test: ◦ Shared foundations: fixtures, test data, configuration, environments and reporting are shared across UI, API, Kafka, database and performance suites. ◦ Cross-layer scenarios: one scenario can cross layers. For example, a test places an order in the UI, then checks the resulting event and the database record. ◦ One quality view: results from every suite feed a single view of release quality. - Design, build and maintain end-to-end and component tests with Playwright and TypeScript for trading and analytics workflows. - Extend our shared test toolkit: page objects, fixtures, and mocks of desktop-container APIs. - Build front-end harnesses for real-time data: mocked WebSocket and REST responses, controlled test data, and deterministic replay of streaming updates. - Cover UI failure modes: disconnects and reconnects, expired sessions, permission failures, bursty feeds, and stale data. - Own front-end performance testing: ◦ Startup and responsiveness: measure app startup and time-to-first-data, and check that the UI stays responsive under high update rates. ◦ Grid behaviour at scale: measure render and scroll performance of grids with tens of thousands of rows. ◦ Container resources: track memory growth and leaks in long-running desktop sessions, and CPU cost per window. ◦ Regression gates: turn the results into budgets that fail CI on a regression. - Build and maintain isolated, on-demand test environments on Linux and AWS: ◦ Lifecycle: environments are created per branch or per run, start with seeded data and known state, and are torn down automatically. ◦ Isolation: test runs don't interfere with each other or with shared environments. - Validate front-end/back-end contracts and payload schemas. - Run UI suites in CI/CD: sharded parallel runs, scheduled regressions, and reporting on pull requests. - Make failures diagnosable: Playwright traces, screenshots and video, and correlation with telemetry. - Work with UI engineers, business analysts and traders to automate critical workflows and define QA acceptance criteria. - Use AI-assisted tools where they help with writing, maintaining and triaging tests. SKILLS Must have - 5+ years of UI test automation, including designing or significantly extending a framework. - Strong TypeScript/JavaScript and Node.js skills, with substantial hands-on Playwright experience. Strong Cypress or Selenium experience plus willingness to move to Playwright is also fine. - Working Python skills (pytest, Playwright for Python): test tooling, data setup, backend checks inside UI scenarios, and contributing to the shared framework. - Experience testing React apps with complex data grids (AG Grid or similar), dynamic forms and heavy client-side state. - Experience mocking network traffic in the browser (REST and WebSocket) and testing authentication flows. - Front-end performance testing experience: ◦ Profiling: Chrome DevTools Performance and Memory panels, and the Lighthouse and performance APIs. ◦ Diagnosis: finding long tasks, layout thrashing and memory leaks. ◦ Budgets: setting performance budgets and enforcing them in CI. - CI/CD experience with Azure DevOps (preferred) or Jenkins/GitHub Actions, and Git. - Experience building isolated test environments: ◦ Linux: comfortable on the command line, with shell scripting, processes, networking and log troubleshooting. ◦ Docker: Docker and Docker Compose. ◦ AWS: EC2, ECS or EKS, S3, IAM, VPC and CloudWatch. ◦ Infrastructure as code: Terraform, CloudFormation or CDK. - Strong reliability habits: isolated tests, deterministic waits instead of sleeps, controlled retries, and triage of flaky tests. - Experience with test reporting and traceability (Playwright reports, Allure, Azure Test Plans, TestRail). - Clear communication and good documentation. Nice to have • Trading or buy-side experience: OMS/EMS, algos, positions, allocations, or risk. • Java exposure, enough to read service code and contribute to backend suites in the shared framework. • Desktop container automation: Electron, OpenFin, or similar. • Component testing (Vitest or Jest). Storybook visual or interaction testing. • Accessibility and visual-regression testing. • React Profiler and familiarity with React rendering performance (memoization, virtualization). • OpenTelemetry or similar real-user-monitoring tools, and using production RUM data to pick performance test scenarios. ## How to apply Apply on the job page, https://poland-devjobs.com/jobs/luxoft-senior-software-development-engineer-in-test-4tz1epf: its Apply button opens the employer's own application page. ## More jobs from Luxoft - [Senior Java Developer with Kafka and Flowable](https://poland-devjobs.com/jobs/luxoft-senior-java-developer-with-kafka-and-flowable-5g78c9s): DXC Luxoft · Luxoft, Wrocław, Poland. On-site. Posted 3 November 2026. - [Lead Pyspark Developer](https://poland-devjobs.com/jobs/luxoft-lead-pyspark-developer-mqo0u8g): DXC Luxoft · Luxoft, Gdańsk, Poland. On-site. Posted 2 November 2026. - [Lead Pyspark Developer](https://poland-devjobs.com/jobs/luxoft-lead-pyspark-developer-h8erko9): DXC Luxoft · Luxoft, Warsaw, Poland. On-site. Posted 2 November 2026. - [Mulesoft Engineer](https://poland-devjobs.com/jobs/luxoft-mulesoft-engineer-2z8tsg2): DXC Luxoft · Luxoft, Remote (Poland). Posted 2 November 2026. - [Lead Pyspark Developer](https://poland-devjobs.com/jobs/luxoft-lead-pyspark-developer-ubtce82): DXC Luxoft · Luxoft, Kraków, Poland. On-site. Posted 2 November 2026.