lemlist

Fullstack JS/TS

In short

Fullstack TypeScript/JavaScript role at lemlist, a bootstrapped B2B SaaS doing $60M+ ARR, starting as Senior Developer and evolving into a Tech Lead position within a squad after 3-6 months. The job covers end-to-end feature development (frontend + backend), codebase improvement, mentoring, and eventually driving technical decisions and delivery. Requires 8+ years of TypeScript/JavaScript experience, Node.js, React, MongoDB, prior B2B SaaS startup experience at scale, and fluency in French & English within a French timezone. Fully remote, with an optional office in Paris.

About lemlist
lemlist is a global B2B SaaS business with one mission: help any business grow. We're doing $60M+ ARR, while being:
•Bootstrapped & profitable, giving us freedom and independence
•170 people, remote-friendly, agile
We run two product lines:
•Sales Engagement with lemlist & Claap ($56M ARR, growing +60% YoY)
•Social selling with Taplio & Tweet Hunter ($4.5M ARR)
Our ambition: become a world-class giant in Sales Tech. Our mantra: Keep growing.
We're looking for a Tech Lead or a Senior Fullstack TypeScript Developer to join our team. 👉 The role starts as a Senior Developer, then evolves into a Tech Lead position after 3-6 months, once you've proven yourself in the squad. You'll design, build, and ship features across frontend and backend, improve performance, and progressively take leadership within your squad to set technical standards, mentor peers, and drive delivery.
Responsibilities
•Build new features end-to-end (frontend + backend) by working hand-in-hand with a strong Product team
•Improve the codebase (refactoring, bug fixes, optimization)
•Collaborate with the rest of the team to solve technical issues
•Mentor fellow developers, share knowledge, and raise the bar
•Step up as Tech Lead in your squad: drive quality, make technical choices, and align delivery
Within 3 months
•You're fully onboarded and comfortable in our stack
•You've shipped meaningful features in production
•You've contributed to improving our codebase
Within 6 months
•You've led delivery of multiple successful projects
•You've had direct impact on scalability & performance
•You've grown into your Tech Lead role and mentor others
Requirements
•8+ years in TypeScript / JavaScript (frontend + backend)
•Solid skills in Node.js, React, MongoDB
•Proven track record building & maintaining web apps
•Always hungry to learn more, particularly around JS/TS
•Autonomous, fast learner, and collaborative
•Fluent in French & English, based in French timezone (+/- 2h)
•B2B SaaS startup experience
•You worked on a SaaS that scaled massively
•You are familiar with advanced performance optimization
•Self-taught hacker or side-project builder
•Passionate about experimenting & creating beyond work
Conditions & Benefits
•Join a bootstrapped, profitable, fast-growing SaaS company
•Build products used by thousands of businesses worldwide
•See your impact quickly with a very short feedback loop
•Work with senior engineers who love to learn and share knowledge
•Remote-first culture (office in Paris if you prefer 🇫🇷)
•No endless meetings, high autonomy, big impact
•65 - 75K€ fixed
•Profit sharing: when lemlist wins, you win too
•Full perks: Alan Blue (healthcare) 100% taken care of for you and your family, Swile meal vouchers, 100% of your Navigo card, MacBook Pro & remote setup budget
•Annual global team retreat in amazing locations 🌍
Recruitment process
1.Interview with Lucas (TAM)
2.Technical interview with Corentin (VP of Engineering)
3.Technical interview with Mickael (CTO)
4.Final chat with Charles (CEO)

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