Technical Lead - Fullstack JS/TS

lemlist is a global B2B SaaS business with one mission: help any business grow.

We’re doing $54M+ ARR, while being:

We run two product lines:

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.

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• You’re fully onboarded and comfortable in our stack

• You’ve shipped meaningful features in production

• You’ve contributed to improving our codebase

• 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

• 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

• 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

• 65 - 75K€ fixed + 18K€ bonus

• 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 🌍

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)