Senior Fullstack TS Developer (backend-oriented)
lemlist
full-remoteseniorpermanentfullstackbackend Full remote - Paris, FR 66 days ago via WTTJ
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TypeScriptFullstackRefactoringDebuggingPerformance OptimizationCustomer Support EnablementB2B SaaSSales Engagement Platform
About the role
Role overview
Senior Fullstack TypeScript Developer (backend-oriented) at lemlist. You’ll design and build new features for the company’s sales engagement platform, working independently and improving the existing codebase.
Responsibilities
- Conceive and develop new features from scratch for the platform, covering both frontend and backend.
- Improve the codebase through refactoring, bug fixes, and performance/technical optimizations.
- Work across multiple projects simultaneously.
- Assist the customer support team with technical issues.
Requirements
- Strong TypeScript fullstack development skills.
- Ability to work independently and deliver features end-to-end.
- Experience improving existing codebases (refactors, debugging, optimizations).
Nice-to-haves
- Experience in a sales engagement / B2B SaaS domain.
- Comfort collaborating with support to resolve real user/customer technical problems.
About lemlist
lemlist is a profitable B2B SaaS company building a sales engagement platform. The role focuses on designing and developing product features across both frontend and backend, improving code quality and supporting customer needs.
Scraped 4/1/2026