Work with the Firefox DOM Core team to write Web Platform Tests and Gecko mochitests, fix failing tests and bugs, and iterate through code review to improve Session History coverage and code correctness in the Gecko codebase. Requires substantial experience with browser engine codebases or automation, strong JavaScript and C++ skills, and solid debugging abilities.

Own day-to-day QA and operations for an internal AI-native growth platform. Responsibilities include testing new releases and regressions, finding and documenting bugs, monitoring platform and agent performance, managing approval/exception queues, and writing/maintaining test plans, runbooks, and release notes. Work closely with product, engineering, and operators in a regulated, multi-market environment (fintech/crypto).

Work on the Web Dependability Engineering team to identify why sites break with DuckDuckGo browsers, distinguish site/browser/privacy-caused issues, lead incident response for major site breakages, build durable cross-platform fixes and automation (including LLM agent pipelines), and reverse-engineer third-party code to produce minimal repro cases.

Remote-first role leading teams of Test Engineers and Technical Writers to deliver automated test suites, manual testing, and technical documentation across Wikimedia engineering teams. Requires technical leadership, hands-on experience with languages such as Go/Python/PHP, and experience managing distributed, multicultural teams.

Responsible for deep SEON product expertise (signals, scoring, rules, device intelligence, data enrichment), integration correctness, end-to-end antifraud process definition, and QA/testing of fraud flows. The role requires collaboration with product, risk, compliance and engineering to optimise decision logic and metrics (fraud rate, false positives, approval rate). Remote role working within Central European Time; applicants across Europe (including EEA, the UK, Switzerland, Ukraine, Moldova, Georgia, Armenia, Montenegro, Turkey and other European locations) are welcome.

Fully remote QA Engineer role (work within CET) focused on ensuring quality of fintech payment products through functional, UI, API, integration, and exploratory testing. Responsibilities include designing test strategies, writing reusable test cases, validating APIs and UI across devices/browsers, reporting bugs, and collaborating with product, design, and engineering teams.