LemlistTechnical Lead - Fullstack JS/TS
Lemlist is hiring a Technical Lead - Fullstack JS/TS for a remote role open to applicants in France. Level rates it ; you can apply on Lemlist.
Level's read on this job
- Little AI ●○○○ is how Level rates this role: aI is not part of the work.
- This is listed as a remote role.
- The posting mentions TypeScript, JavaScript and Node.js among its tools and skills.
- Level classes it as a senior role.
- Lemlist has 12 other open roles on Level.
AI in this role
Join lemlist as a Senior Fullstack Developer transitioning to a Tech Lead role, building features in TypeScript, Node.js, and React for a bootstrapped SaaS.
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)
How we rate this
Technical Lead - Fullstack JS/TS at Lemlist rates 0 out of 100 for how much of the daily work is AI. That makes it Little AI (AI Level 1 of 4). The level is about AI in the job, not seniority.
Little AI. AI is not part of the work.
- ●●●● Builds AI80 to 100
- ●●●○ Works on AI60 to 79
- ●●○○ Uses AI40 to 59
- ●○○○ Little AI0 to 39
Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.
Prepare for this job
Built from this posting and from similar jobs on Level.
Skills and AI tools this role asks for
Questions you could be asked
- Tell me about a project where fullstack development was part of your work. What did you do?
- Tell me about a project where backend was part of your work. What did you do?
- Tell me about a project where frontend was part of your work. What did you do?
- Tell me about a project where mentorship was part of your work. What did you do?
- Tell me about a project where software architecture was part of your work. What did you do?
Adapt your resume
- List these exact terms on your resume: Fullstack Development, Backend, Frontend, Mentorship, and Software Architecture. An applicant tracking system matches the wording, not the idea.
- Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.
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