Josselin d'Espinay

Profile & Expertise

A snapshot of my technical strengths, leadership approach, and the values that guide my work.

About Me
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Im a seasoned front-end engineer and engineering manager with a strong track record of building modern web applications and leading high-impact teams. My career spans hands-on technical work, system design, team coaching, and cross-functional leadership, allowing me to deliver high-quality products while scaling teams and fostering ownership.
Front-End Excellence
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I have deep expertise in modern JavaScript frameworks, primarily ReactJS, with production experience in Next.js, Vue, and Angular. My tooling stack includes TypeScript, Tailwind CSS, and SCSS, and Ive led the development of robust, reusable component libraries using Storybook and scalable design systems. I'm comfortable owning the full lifecycle of UI development, from atomic components to application-wide theming and performance optimization.

Ive worked extensively with state management tools like Redux, and I build with confidence thanks to a strong testing culture using Jest and Cypress. Tooling and code quality matter to me, I actively maintain clean configurations with ESLint, Webpack, and Vite, and I use Git and Sentry to ensure traceable, debuggable deployments.

Product-Driven & Technically Strategic
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I bring a product-oriented mindset to my technical work. Whether leading the redesign of a complex UI, improving system performance, or refining analytics workflows, I aim for outcomes that support business goals. My work on large-scale applications, such as AI powered assistants or SEO analytics dashboards, reflects my ability to navigate uncertainty, define scope, and balance speed with reliability.

I enjoy connecting dots between business strategy and software architecture, and I regularly collaborate with designers, PMs, and data teams to shape roadmaps and product direction.

Team Leadership & Mentorship
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In my current role as an Engineering Manager, I coach engineers toward growth, structure teams for impact, and enable autonomy through ownership. Ive successfully guided underperforming developers to meet and exceed expectations, and Ive scaled teams through structured delegation, project ownership, and a strong feedback culture.

I practice servant leadership, creating space for others to lead while providing the right level of support. My teams continue to thrive even in my absence, which I see as a sign of sustainable leadership.

Remote Collaboration & Communication
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Fluent in English and French, I work seamlessly in distributed, multicultural environments. Ive led fully remote teams across time zones and geographies, relying on clear async communication, strong rituals, and tight alignment with stakeholders to ensure smooth collaboration.

Im comfortable engaging with technical and non-technical audiences alike, whether presenting architecture decisions, conducting workshops, or negotiating trade-offs with product and leadership teams.

Delivery & Process
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Ive led teams in Agile environments and helped reshape delivery processes to improve estimate reliability and feedback loops. From sprint rituals to project-based squad reorganization, I aim to create systems that support team health and high-velocity output without burning out people.
Technical
    React.jsNext.jsAngularVueTypeScriptTailwindCSS/SCSSStorybookDesign systemsReduxJestCypressGitWebpackESLintViteSentry
Soft
    AgileRemote collaborationTeam leadershipCommunicationProblem-solvingMentoringCross-functional collaborationProduct visionStakeholder managementProject management
Languages
    English – Fluent (daily use professionally and at home)French – Native