Technical Lead - Fullstack JS/TS

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.

About the role

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.

What you’ll do

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

What success looks like

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

What’s in it for you

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

About you

Must have

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)

Nice to have

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

Package

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 🌍

Recruitment process

Interview with Lucas (TAM)

Technical interview with Corentin (VP of Engineering)

Technical interview with Mickael (CTO)

Final chat with Charles (CEO)