Staff Engineer - Fullstack JS/TS
lemlist
full-remoteleadpermanentfullstackengineering-management Full remote - Paris, FR 173 days ago via WTTJ
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JavaScriptTypeScriptFullstackPerformanceScalabilityMentorshipFrontendBackendB2B SaaSProject Delivery
About the role
Staff Engineer — Fullstack JS/TS
Join lemlist, a fast-growing B2B SaaS company on a mission to help businesses grow. As a Staff Engineer, you will design, build, and ship features across both frontend and backend, improve performance, and mentor peers.
Responsibilities
- Design, build, and ship features across the frontend and backend.
- Improve application performance with a strong focus on scalability.
- Collaborate with the team to resolve technical problems.
- Mentor peers and progressively take direction on more transversal topics.
- Lead delivery of multiple successful projects with direct impact on scalability and performance.
Requirements
- Strong fullstack engineering skills in JavaScript/TypeScript.
- Demonstrated ability to ship features across frontend and backend.
- Experience improving performance and thinking in terms of scalability.
- Ability to mentor and contribute to technical direction.
Nice-to-haves
- Experience leading delivery of multiple projects and taking ownership of cross-cutting initiatives.
About lemlist
lemlist is a fast-growing B2B SaaS company focused on helping businesses grow. The role involves building and shipping product features that impact scalability and performance at scale for thousands of customers.
Scraped 4/1/2026