Senior Software Development Engineer in Test

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.

Other

Languages

English: B2 Upper Intermediate

Seniority

Senior

Luxoft Benefits*

• ●Relocation options **
• ●Experience in an international environment
• ●Cross-cultural experience
• ●Feedback culture
• ●Regular appraisals
• ●Annual holiday - 20 or 26 days. The duration of the leave depends on the overall seniority
• ●Occasional leave - 1 or 2 days/ depending on the circumstances
• ●Child care leave - 2 days or 16 hours per year
• ●Absence due to force majeure - 2 days or 16 hours per year
• ●Maternity Leave - 20 weeks
• ●Parental Leave - 41 weeks
• ●Paternity Leave - 14 days
• ●Expert-led tech courses covering basic to advanced topics
• ●Internal instructor-led soft skills courses
• ●Comprehensive in-house self-learning resources for both soft and hard skills
• ●Access to external self-learning libraries like ProQuest eBook and Udemy for Business
• ●Cloud Programs: MS Cloud Academy, AWS Partner Academy, Google Cloud Academy
• ●Custom Learning Programs: upskilling, reskilling, technical mentorship
• ●Leadership Programs for Managers
• ●Multisport card
• ●Possibility to order Multisport card at the corporate rate for family members
• ●LuxGood Program: wellbeing seminars, contests, relaxation sessions, yoga sessions, etc.
• ●One Team Program: Buddy for each New Joiner; seminars, meeting and workplace space to support integration with local community and culture; “Hire me” workshops for partners
• ●Preferential banking offer
• ●Preferential car leasing offer
• ●Cafeteria program discounts for shops, cinema tickets, holiday offers
• ●Luxoft Social Benefit Fund: sport and recreation benefits, the possibility to receive financial support
• ●Private Healthcare Insurance with unlimited access to specialists
• ●Full dental support
• ●Travel Insurance
• ●Possibility to add private healthcare coverage for family members at the corporate rate
• ●Life insurance at the corporate rate for employees and family members, including payment of the basic package for the employee by the employer
• ●Reimbursement for corrective glasses
• ●Many fun social activities organized by the Luxoft team offline in your city
• ●Online entertainment events for whole company and local team events
• ●A workplace where you’re treated with respect within a multicultural team
• ●Rotation between projects and accounts
• ●New career opportunities

*The acquisition of rights to the above benefits depends on the form of cooperation. Benefits apply to those employed under a contract of employment.

Please note that relocation is not available for all open positions. At Luxoft Poland it is possible to work remotely only from the territory of Poland.

*Options offered by the Polish government.

Remote Poland, Poland

Req. VR-125637

Python

BCM Industry

03/11/2026

Req. VR-125637

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