{"id":446986,"url":"https://alion.io/job/lemlist-staff-engineer-fullstack-jsts","title":"Staff Engineer - Fullstack JS/TS","company":{"id":172799,"name":"lemlist","domain":"lemlist.com","url":"https://alion.io/company/lemlist","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":94,"open_postings":10,"ghost_share":0.1,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":49,"computed_at":"2026-11-04T06:34:25Z"}},"role":"Backend","role_family":"Backend","seniority":"staff","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Paris, 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giving us freedom and independence\n\nWe run two product lines:\nSales Engagement with lemlist & Claap ($50M ARR, growing +60% YoY)\n\nSocial selling with Taplio & Tweet Hunter ($4.5M ARR)\n\nOur ambition: become a world-class giant in Sales Tech.\nOur mantra: Keep growing.\nAbout the role\nWe’re looking for a Staff Engineer to join our team.\nYou’ll design, build, and ship features across frontend and backend, improve performance, and progressively take leadership on more transversal topics, mentor peers, and drive delivery.\nWhat you’ll do\nBuild new features end-to-end (frontend + backend) by working hand-in-hand with a strong Product team\n\nImprove the codebase (refactoring, bug fixes, optimization)\n\nCollaborate with the rest of the team to solve technical issues\n\nMentor fellow developers, share knowledge, and raise the bar\n\nStep up as Tech Lead on specific topics: drive quality, make technical choices, and align delivery\n\nSolve difficult problems that impact 10,000s of customers every day\n\nWhat success looks like\nWithin 3 months\nYou’re fully onboarded and comfortable in our stack\n\nYou’ve shipped meaningful features in production\n\nYou’ve contributed to improving our codebase\n\nYou've brought knowledge to the team that made other people improve\n\nWithin 12 months\nYou’ve led delivery of multiple successful projects\n\nYou’ve had direct impact on scalability & performance\n\nYou’ve grown into your an internal reference on some technical topics and mentor others\n\nWhat’s in it for you\nJoin a bootstrapped, profitable, fast-growing SaaS company\n\nBuild products used by thousands of businesses worldwide\n\nSee your impact quickly with a very short feedback loop\n\nWork with senior engineers who love to learn and share knowledge\n\nRemote-first culture (office in Paris if you prefer )\n\nNo endless meetings, high autonomy, big impact\n\nAbout you\nMust have\n10+ years in Software Engineering\n\n7+ years in JavaScript/TypeScript (frontend + 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