Senior Software Engineer 5 - Consumer Lifecycle Experiences Platform

Netflix Services Poland sp. z o.o.; Warszawa; On-site; PLN 260,000 - 360,000; Full time

Job summary

Netflix is seeking an experienced Senior Software Engineer to build developer-facing infrastructure and tooling that scales to millions of test runs per month. You will design and operate language-agnostic systems spanning distributed execution infrastructure, telemetry and GenAI-powered developer tooling that make pre-production feedback testing fast and trustworthy.

Our ideal candidate is passionate about developer productivity and thrives on empowering Commerce Engineering engineers worldwide

Qualifications

• Experience building developer platforms, platform services, or productivity tooling.
• Deep understanding of distributed systems and automation platforms (CI/CD, test orchestration).
• Hands-on GenAI experience, including shipping LL M-powered tooling for developers.
• Ability to drive cross-functional, complex technical projects from concept to completion.

Responsibilities

• Design and operate language-agnostic systems for distributed test execution.
• Develop and maintain tools for framework-agnostic analysis of test runs.
• Create synthetic test data generation tooling for reliable pre-production testing.
• Integrate distributed test execution infrastructure into engineering workflows.
• Build solutions to detect and self-heal flaky tests with GenAI-assisted diagnosis.
• Correlate test coverage data with code changes and runtime trace data.
• Ensure scalability, usability, and reliability of the testing platform.
• Define testing strategies with cross-functional teams and document frameworks.
• Stay current with GenAI trends to keep testing infrastructure at the forefront.

Skills

Developer platform experience

Distributed systems

GenAI fluency

CI/CD expertise

Test orchestration

Tools

GitHub Actions

Jest

Mocha

Playwright

Job description

Netflix is one of the world's leading entertainment services, with over 300 million paid memberships in over 190 countries enjoying TV series, films and games across a wide variety of genres and languages. Members can play, pause and resume watching as much as they want, anytime, anywhere, and can change their plans at any time.

About the Team

The Testing Tools & Infrastructure team within the Consumer Lifecycle Experiences Platform is crucial to our Commerce organization. It serves Commerce Experiences by making pre-production testing faster and more reliable. It achieves this by providing centralized platforms for distributed test execution, customer test data creation tools, flaky test analytics and management, and GenAI-powered tooling that enable fast, trustworthy pre-production feedback. We are part of a global, diverse organization that includes people of all genders, sexual orientations, upbringings, nationalities, ages, and socioeconomic & educational backgrounds. We encourage anyone passionate about developer platforms and testing infrastructure to apply.

About the role

We are looking for an experienced Senior Software Engineer to build developer-facing infrastructure and tooling that scales to millions of test runs per month. You will design and operate language-agnostic systems - spanning distributed execution infrastructure, telemetry and GenAI-powered developer tooling that make pre-production feedback testing fast and trustworthy. Our ideal candidate is passionate about developer productivity and thrives on the satisfaction of empowering Commerce Engineering engineers worldwide to quickly and comprehensively test their software. They are excited to leverage their experience building and maintaining automated testing and resilience platforms to provide long-term benefits.

Key responsibilities

• Primary stack: Java, JavaScript/TypeScript, Python, GraphQL, GitHub Actions. You’ll work alongside test frameworks (JEST, Mocha, Playwright) through platform integration work - but you won’t author or maintain test suites yourself
• Implement and manage software solutions that provide accurate and efficient analysis of test runs
• Create and maintain tools for framework-agnostic analysis of distributed tracing tools for test runs
• Stay informed about industry trends and emerging technologies - particularly GenAI applied to developer platforms - to ensure Commerce Engineering remains at the forefront of testing infrastructure
• Develop and integrate software solutions that provide high-quality synthetic test data generation
• Integrate internal and vendor-provided distributed test execution infrastructure into engineering workflows with a focus on reliability and ease of use
• Develop the tools, frameworks and infrastructure that product engineers use to exercise frontend and backend systems - distributed tests execution, mocking, synthetic data, contract verification and performance harness
• Design and operate the systems to automatically detect, quarantine, and self-heal flaky tests - turning noise into an actionable signal for engineers, with GenAI-assisted diagnosis
• Correlate test coverage data with code changes, runtime execution and trace data for comprehensive reporting
• Maintain a strong focus on scalability, usability, and reliability in platform design to support a growing organization of stunning engineers
• Define testing strategies in partnership with cross-functional teams - producing documentation on frameworks and troubleshooting patterns that internal teams rely on

Must Haves

• A stunning software engineer with experience working on developer platform, platform services, or productivity-tooling teams - energized by unblocking other engineers and amplifying their throughput
• A meticulous software designer who researches and documents technical tradeoffs clearly and concisely
• Deep understanding of distributed systems, service design, and automation platforms (CI/CD, test orchestration)
• Hands‑on GenAI fluency - daily use in your engineering workflow, plus experience shipping LLM‑powered systems, ideally for developer users
• Ability to independently drive organization‑wide solutions and manage complex technical projects from conception to completion
• Ability to synthesize complex technical information and communicate it effectively to both technical and non‑technical stakeholders
• Experience establishing strong testing culture, including proficiency with popular test frameworks, code coverage tools, continuous integration systems, and post‑deployment verification methods (healthy contempt for flaky tests is a plus)

Nice To Haves

• You have shipped and maintained Java, JavaScript or Python code in production
• You have designed and implemented metrics data pipelines
• Experience running and operating continuous integration systems like GitHub Actions, Jenkins, CircleCI and others
• Guide the roadmaps of Infrastructure teams according to the specific needs and requirements of product‑focused team members
• You have generated and analyzed traces like Distributed tracing/ Zipkin/ Honeycomb/ Datadog/ Splunk/ Elastic Search APM
• You have implemented advanced log, metric, or error stack trace analysis
• You strive to elevate the knowledge and skills of yourself and others in a way that fosters an inclusive, collaborative environment.
• Deeply enjoy working on solutions that empower other engineers in their work
• Thrive in an ambiguous environment and can self‑manage and self‑prioritize your time, energy, and resources
• Understand that engineering is a team sport and actively farm for feedback and dissent
• Experience working with a globally distributed team

Inclusion is a Netflix value and we strive to host a meaningful interview experience for all candidates.

If you want an accommodation/adjustment for a disability or any other reason during the hiring process, please send a request to your recruiting partner.

We are an equal‑opportunity employer and celebrate diversity, recognizing that diversity builds stronger teams.

We approach diversity and inclusion seriously and thoughtfully.

We do not discriminate on the basis of race, religion, color, ancestry, national origin, caste, sex, sexual orientation, gender, gender identity or expression, age, disability, medical condition, pregnancy, genetic makeup, marital status, or military service.

At Netflix, we want to entertain the world. Whatever your taste, and no matter where you live, we give you access to best‑in‑class TV series, documentaries, feature films and games. Our members control what they want to watch, when they want it, in one simple subscription. We’re streaming in more than 30 languages and 190 countries, because great stories can come from anywhere and be loved everywhere. We are the world’s biggest fans of entertainment, and we’re always looking to help you find your next favorite story.