Senior Software Engineer - Web Platform

About Dashlane Dashlane’s mission is to deliver the credential security every business and employee needs to thrive. Millions of consumers, and over 25,000 brands worldwide, such as Michelin, Air France, and Forrester, trust Dashlane for industry-leading innovations, patented zero-knowledge security, and an unmatched user experience. Founded in Paris, Dashlane has since established offices in New York and Lisbon, and has grown to more than 300 Dashlaners globally. We're looking for people who actively use AI tools to drive efficiency, creativity, and impact in their work. At Dashlane, we drive innovation and value learning, strive for excellence in everything we do, and thrive as one team. Learn more about life at Dashlane , including how we work , how we hire , and the benefits of being a Dashlaner . About the role Are you looking for a role where you can shape the future of credential security? We are seeking a Senior Software Engineer to elevate the reliability, performance, and quality-by-design of Dashlane’s Web Platform. This is a high-impact technical role, helping shape long-term architectural direction while enabling teams to deliver faster and more confidently at scale. As a Senior Software Engineer, you will design and implement robust quality and observability capabilities, contribute to engineering best practices within your team, and champion a security-first, reliability-driven mindset. You will apply deep expertise in quality and testing alongside strong web and platform engineering knowledge to deliver sustainable, measurable improvements to our engineering standards and user experience. In this role, you will combine strong frontend expertise with a forward-thinking AI mindset, integrating GenAI tools throughout the SDLC to accelerate development velocity while working in a deeply collaborative team to secure millions of digital identities. Location: You will be based in Lisbon, with English as your working language. At Dashlane, we embrace a hybrid culture that combines the best of both worlds: the creativity and energy of in-person collaboration with the flexibility of remote work. Our model is designed to strengthen team connections while supporting individual productivity and work-life balance. To maximize collaboration, we come together in the office on Mondays, Tuesdays, and Thursdays, while Wednesdays and Fridays offer more flexibility for focused work. About our stack: Programming language: Typescript, Javascript, React, RxJS Quality: Sonarqube, ESLint Testing: Jest, Karma, WebdriverIO, Cucumber Build: Webpack Versioning: Gitlab Monitoring: ELK, Tableau Documentation and tooling: Confluence, Gitlab, Zoom, Slack Misc: Gitlab CI, PNPM, Miro AI : Claude Code At Dashlane you will: Drive the long-term technical vision for Web Platform quality and reliability, shaping architecture with a strong focus on performance, testability, security, and quality-by-design. Design and enable platform-level quality capabilities (testing frameworks, observability standards, CI/CD guardrails, and tooling) that empower multiple teams to ship faster, safer, and with higher confidence. Act as a multiplier, identifying systemic gaps, driving high-leverage improvements, and ensuring measurable outcomes in Web Platform reliability, stability, and engineering standards. Raise the engineering bar across teams by coaching, mentoring, and influencing engineers, while continuously learning and sharing knowledge to foster a culture of technical curiosity, craftsmanship, security, and engineering excellence. Partner closely with Product Managers, Engineering Managers, and cross-functional teams, influencing prioritization and decision-making by clearly articulating trade-offs between engineering excellence and business needs. Optimize end-to-end testing strategies, improving test effectiveness, execution speed, and confidence in production releases at scale. Act as an AI Pioneer within the engineering organization, demonstrating proven