Senior Software Engineer – Add-Ons

This is a fully remote position, open to applicants in Germany.

📋 Description

• Implement significant features and architectural enhancements across the Add-ons stack, encompassing automated moderation pipelines, Reviewer tools, and DevHub.

• Define and uphold engineering standards for code reviews, production readiness, runbooks, incident response, on-call protocols, coding standards, and infrastructure as code.

• Develop comprehensive observability systems and data-driven insights.

• Offer peer feedback, disseminate knowledge, and support the growth of others.

• Construct and refine systems that facilitate secure development, deployment, monitoring, and operation of production services.

• Enhance CI/CD pipelines through declarative, pipeline-as-code methodologies.

• Deliver work iteratively with a transparent backlog, brief feedback loops, retrospectives, and demonstrations for stakeholders.

• Produce technical documentation, which includes design notes, Architecture Decision Records, runbooks, and incident reports.

• Trace requests and asynchronous tasks end-to-end across unfamiliar codebases to diagnose failures and pinpoint areas for improvement.

• Collaborate with designers, product managers, QA, and community contributors.

• Engage in contributions through pull requests, code reviews, and collaborative discussions.

• Develop submission processes, trust and safety indicators, and modernized DevHub and Reviewer tools.

• Utilize Python/Django, MySQL, React/TypeScript, and asynchronous processing systems.

• Establish internal developer platforms and streamlined pathways.

• Participate in team ceremonies and initiatives for process enhancement.

• Assist with deployments, monitoring, and incident response.

⛳️ Requirements

• Extensive hands-on experience in developing and maintaining production applications using Python/Django.

• Proven experience in operating and enhancing production software systems where reliability and safe delivery are essential.

• Strong expertise with CI/CD systems and managing pipelines and infrastructure declaratively as code.

• Experience in designing or refining automated testing and deployment workflows, including integration testing and staged or progressive delivery.

• Solid understanding of observability, including metrics, logging, tracing, service-level objectives, and actionable alerting.

• Background in building or maintaining internal tools or platforms utilized by other engineering teams.

• Experience in defining or enhancing engineering practices, such as code review standards, operational readiness, runbooks, incident response, on-call expectations, or definitions of done.

• Ability to comprehend and navigate unfamiliar codebases and trace application behavior across frontend, backend, asynchronous jobs, data stores, and infrastructure.

• Experience in debugging complex production issues and translating findings into sustainable system improvements.

• Strong technical writing capabilities, including design documents, ADRs, runbooks, and incident reports.

• Experience working iteratively with a visible backlog, regular stakeholder feedback, and retrospectives.

• Exceptional collaboration and communication skills in a distributed team setting.

• Willingness to share knowledge and mentor peers in operational and reliability practices.

• Commitment to Mozilla's values: embracing differences, fostering relationships, engaging in responsible participation, and demonstrating resilience.

• Bonus: Familiarity with Google Cloud and Kubernetes.

• Bonus: Experience with infrastructure-as-code and policy-as-code tools.

• Bonus: Knowledge of establishing SLOs and error-budget-based reliability practices.

• Bonus: Background in chaos engineering, disaster recovery testing, or production readiness assessments.

• Bonus: Experience with trust and safety, automated moderation, abuse prevention, or other adversarial systems.

• Bonus: Contributions to open source projects.

🏝️ Benefits

• Generous performance-based bonus plans available to all eligible employees - we celebrate our success as one team.

• Comprehensive medical, dental, and vision coverage.

• Generous retirement contributions with 100% immediate vesting (regardless of your contributions).

• Quarterly company-wide wellness days where everyone takes a collective pause.

• Country-specific holidays plus an additional day off for your birthday.

• One-time home office stipend.

• Annual budget for professional development.

• Quarterly well-being stipend.

• Significant paid parental leave.

• Employee referral bonus program.

• Additional benefits (life/AD&D, disability, EAP, etc. - varies by country).