Senior Fullstack JavaScript Developer (Product Engineer)

Remote, USA
Posted Jun 14, 2026
Full-time

About lempire

lempire is a global B2B SaaS business with the mission to help any business grow.
We are doing over $32M in ARR while being:

  • Bootstrapped

    Profitable

    A small, agile team of 100 highly talented people, remote-friendly

    Majority owned by an entrepreneur, Guillaume Moubeche, Founder & Chairman — which gives us maximum freedom

    We operate 2 business lines:

    Sales Engagement with our flagship product lemlist, generating $27M ARR and growing over 40% year over year

    Personal Branding with Taplio & Tweet Hunter, generating $5M ARR

    lempire is a highly ambitious company that aims to become a world-class giant in the Sales Tech space.
    Our mantra: Keep growing – and we live by it every day.

    Job description

    We're looking for a Senior Fullstack Javascript Developer to join our team. You'll be responsible for designing and developing new features for our SaaS products. We need someone who is passionate, autonomous, and loves technical challenges.

    Your main missions will be:

    Design and develop new features from scratch, both on the frontend and backend, Independently developing new features that enhance user experience and increase product functionality.

    Stepping into the role of technical lead within your squad, driving excellence and setting standards.

    Improve the code base with refactoring, bug fixes, and optimization

    Work on multiple projects simultaneously

    Help the customer support team on technical issues, providing prompt and effective solutions

    Facilitating knowledge sharing and capacity building by training fellow developers, enhancing overall team competency and productivity.

    Key results

    Within 3 months you will have

    Successfully onboarded and integrated into the team

    Developed a deep understanding of our B2B SaaS products and their technical requirements

    Contributed to the development of new features and improvements to our existing code base

    Within 12 months you will have

    Played a key role in the development and delivery of multiple successful projects

    Made significant contributions to the optimization and scalability of our software products

    What’s in it for you?

    Work in a profitable, bootstrapped, and high-growth company that doesn’t rely on external funding to live.

    You will have the opportunity to make a lasting impact on a suite of products that are changing the game in multiple industries.

    Work with passionate senior engineers who share their knowledge and expertise

    Great ownership of your work. You will be part of a dynamic, innovative, and passionate team that respects autonomy and encourages individual input.

    No endless meetings

    Full remote policy

    You will grow professionally and personally, enhancing your technical skills and expanding your global network.

    Preferred experience

    Must have

    You’re an expert in Javascript with at least 5 years of XP

    You have a proven track record in building and maintaining web applications.

    You have a robust understanding of NodeJS and MongoDB

    You’re able to work independently and take ownership of complex projects

    You’re a fast learner

    You’re comfortable with the agile methodologies

    You like to communicate

    You like to work remotely, Gather, Slack and Notion are your best friends

    You are adaptable and like to discover new things and you can work on front-end integration, back-end development, mongo optimization, customer support, and more

    You speak French and English and you are in the French timezone

    Nice to have

    You have a first experience in B2B SaaS startup

    You are self-taught, you have been developing personal projects since you were a child or in the evenings and weekends. This is not mandatory but a big plus for us, we are all passionate about programming and like to create things, both at work and outside

    Additional Information

    Salary between 55K€ and 65K€ fixed salary + 15K€ 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

    Profit sharing: When lempire wins, all team members share the profits

    Alan Blue: Comprehensive 100% premium medical coverage for you and your family

    Swile Meal Tickets: Enjoy daily meal tickets to fuel productivity

    Navigo Card: Seamless commuting with a 100% covered Navigo card

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

    Gear: Get a Macbook Pro + tools and equipment you need for your job

    Team building: We all meet once per year at really cool places around the world (you can check our video here ;)

    Recruitment process

    Interview with Lucas our TAM

    Interview with Mickael, our CTO

    Technical Interview with Mickael, our CTO, and Corentin, our VP of Engineering

    Interview with our CEO

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