Fullstack Developer – Taplio & TweetHunter

lemlist; Paris; Remote; EUR 59,000 - 72,000; Full time

Job summary

lemlist is seeking a skilled Fullstack Developer to help improve Taplio. You will refactor a messy codebase into scalable, maintainable systems, working with fullstack TypeScript, Node.js, React, Next.js, and Google Cloud Platform.

You’ll build new features including AI-driven improvements and MCP, enhance performance, and support customer success when needed. This is a fully remote role with Paris offices available for those who prefer them.

Qualifications

• 5+ years of software development experience.
• Strong JavaScript/TypeScript skills with front-end and back-end work.
• Responsible for own code and quality.
• Ability to see the big picture and balance trade-offs.
• Fast learner, proactive, independent, with English fluency.

Responsibilities

• Refactor and optimize codebase (Fullstack TS, Node.js, React, Next.js).
• Build new features including AI-enabled ones and MCP improvements.
• Improve performance and maintainability.
• Support customer success by solving technical issues.
• Balance speed and quality when evaluating product requests.

Skills

JavaScript/TypeScript

Owns code quality

Big-picture thinking

Proactive learner

English fluency

Tools

Google Cloud Platform (GCP)

LinkedIn API

Job description

About us

lemlist is the sales engagement platform that gives sales teams the unfair advantage they deserve.

Bootstrapped since day one, we’ve grown from 0 to $63M ARR in 8 years, without raising a single dollar.

Today, we’re a profitable B2B SaaS company valued at $250M+, trusted by 40,000+ sales teams worldwide to book more meetings and close more deals.

The Role

We’re looking for a Fullstack Develope r to help usimprove Taplio.

If you love building new things, but also turning messy code into something scalable and maintainable, keep reading

What You’ll do

• Refactor and optimize our codebase (Fullstack TypeScript, Nodejs, React, Next.js, Google Cloud Platform).
• Build amazing new features for our users, including ones involving AI and improving our MCP
• Improve performance and maintainability
• Support customer success, solving technical issues when needed
• Challenge product requests, balancing speed and quality

What’s in It for You?

Fully remote & flexible work. Amazing offices in Paris if you prefer

Join a profitable, bootstrapped, and high-growth company

Work with a motivated, no-BS team

Direct impact – your work will shape our product

Who You Are?

Must-Haves

• 5+ years experience
• Strong JavaScript / TypeScript skills
• Responsible for your own code
• Ability to see the big picture and suggest smart trade-offs
• Fast learner, proactive, and independent
• Fluent in English

Nice-to-have

• Experience with LinkedIn API
• Strong GCP knowledge

Additional Information

Salary up to 65K€ base salary + additional company bonus

Where you live, and work is totally up to you – we do have an office in Paris if you enjoy life at the office

Full-remote Work Setup: A well-funded home office budget to ensure seamless remote work

Get a 48GB Macbook Pro + all the tools and equipment you need for your job obviously

Team building: We all meet once per year at really cool places around the world

Interview Process

• Interview with Lucas, our Tech TAM
• Interview with Sebastien, our Technical Manager
• Technical test + review with 2 devs from team
• Interview with our GM & COO