Staff Engineer - Fullstack JS/TS

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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

170 people, remote-friendly, agile

Majority-owned by our founder Guillaume Moubeche , giving us freedom and independence

We run two product lines:
Sales Engagement with lemlist & Claap ($50M 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 Staff Engineer to join our team.

You’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.

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 on specific topics: drive quality, make technical choices, and align delivery

Solve difficult problems that impact 10,000s of customers every day

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

You've brought knowledge to the team that made other people improve

Within 12 months
You’ve led delivery of multiple successful projects

You’ve had direct impact on scalability & performance

You’ve grown into your an internal reference on some technical topics 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
10+ years in Software Engineering

7+ years in JavaScript/TypeScript (frontend + backend)

Solid skills in Node.js, React, MongoDB

Proven track record building & maintaining web apps

Always hungry to learn more

Autonomous, fast learner, and collaborative

Fluent in French & English, based in French timezone (+/- 2h)

Nice to have
B2B SaaS startup experience

Self-taught hacker or side-project builder

Passionate about experimenting & creating beyond work

Package 75-90K€ base salary

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)

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