Software Development Engineer in Test (SDET) at LEGO Digital Play | GB | Rezi

Software Development Engineer in Test (SDET) at LEGO Digital Play

Software Development Engineer in Test (SDET)

LEGO Digital Play · GB

1 weeks ago

Software Development Engineer in Test (SDET)

LEGO Digital Play · GB

12 days ago
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About the Role

The Central Technology team is the engineering heart of LEGO Digital Play, pioneering creative and joyful digital experiences by building foundational platforms, tools, and capabilities. This role involves shaping something from the ground up within a beloved brand, working at the intersection of play, applied AI, and developer tooling.

Responsibilities

  • Design, build, and maintain test automation frameworks and harnesses for SDKs, APIs, libraries, and services.
  • Develop and execute tests across the pyramid: unit, integration, contract, end-to-end, and performance.
  • Build and own CI/CD test pipelines, ensuring quality gates are fast, deterministic, and reliable.
  • Apply AI-assisted testing tools to generate, maintain, and triage tests.
  • Diagnose failures to root cause across engine versions, platforms, and configurations.
  • Establish reliability and observability for the test estate, including clear reporting and actionable signals.
  • Partner with engineers to embed testability into designs and provide clear, prioritized defect feedback.
  • Uphold safety, brand integrity, privacy, and IP obligations in test design, including validation of compliance-sensitive behavior.

Requirements

  • Strong hands-on software engineering experience with clean, maintainable code.
  • Proven experience designing and building test automation frameworks from the ground up.
  • Proficiency in modern testing approaches: test pyramid, shift-left testing, contract testing, and risk-based test design.
  • Hands-on experience building and maintaining CI/CD pipelines and integrating automated testing.
  • Demonstrated experience using AI tools in a testing or engineering workflow with sound judgment.
  • Strong debugging and troubleshooting skills across platforms, versions, and configurations.
  • Fluency in one or more languages commonly used for test automation (e.g., C#, Python, TypeScript, Java).
  • Excellent communication skills, able to explain quality trade-offs clearly.
  • Sound judgment and comfort with ambiguity; able to define a testing strategy where none exists.
  • Awareness of safety, privacy, IP, and compliance obligations and their translation into test coverage.

Skills

  • Test automation frameworks
  • SDK testing
  • API testing
  • CI/CD pipelines
  • AI-assisted testing
  • Debugging
  • Troubleshooting
  • C#
  • Python
  • TypeScript
  • Java
  • Performance testing
  • Load testing
  • Reliability testing
  • Security testing
  • Unity
  • Game development

Location

  • London HQ

Work Type

  • Full-time

Experience Level

  • Software Development Engineer in Test

About the Company

  • LEGO Digital Play brings the LEGO brand into digital entertainment in new, innovative, and wholly-owned ways.
  • Our mission is to ensure the LEGO Brand remains a powerful part of children’s lives.
  • We aim to provide meaningful, magical, and playful new experiences to kids, parents, and adult fans.
  • Central Technology builds foundational platforms, tools, and capabilities for LEGO's digital future.
  • We are at the earliest phases of a new company, offering a unique opportunity to build an entity for a beloved brand.
  • Our culture is open, collaborative, intellectually rigorous, and creatively vibrant.