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Fullstack Developer – Taplio & TweetHunter

About us 👇🏼

At lempire, we're a passionate team on a mission to help individuals and businesses grow.

As a B2B SaaS company, valued at $150 million, we have a suite of 5 products:

🔵 lemlist: our cold outreach tool, used by 10,000+ users worldwide to find leads & their emails, write campaigns, personalize at scale, and get more customers.

🟠 lemwarm: the 1st deliverability tool on the market that helps users reach their audience’s inboxes.

🔴 lemcal: our scheduling tool that allows you to create a personalized booking page and reduce no-shows.

🟣 Taplio & Tweet Hunter: our tools, used by top influencers like Justin Welsh, to build personal brands on LinkedIn & X (formerly Twitter).

lempire is a fast-growing company with $26M+ in revenue, profitable, and 100% bootstrapped.

Our mantra: Keep growing! We live by it every day.


💻 The Role

We’re looking for a Fullstack Developer to fix, clean, and improve Taplio & Tweet Hunter.

If you want a brand-new project, this isn’t for you.

If you love turning messy code into something scalable and maintainable, keep reading.

🛠 What You’ll Do

Refactor and optimize our codebase (Next.js, Google Cloud Platform, Javascript, Git).

• Identify and fix bugs across frontend and backend.

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.

✅ 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

3+ years experience

Strong JavaScript / TypeScript skills.

Proven experience cleaning messy code.

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 Twitter Enterprise APIs.

• Experience with LinkedIn APIs.

• Strong GCP knowledge.


Additional Information

Salary up to 65k based on xp + 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 ;)




Interview process

Interview with Victoire our TAM

Fit dev+PM

Technical test - TBD

Interview with our GM

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Average salary estimate

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$65000K

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What You Should Know About Fullstack Developer – Taplio & TweetHunter, lempire

Are you a passionate coder looking to make a real impact? At lempire, we're thrilled to welcome a Fullstack Developer to join our dynamic team right here in Paris! With our innovative suite of B2B SaaS products, including Taplio and TweetHunter, you’ll play a pivotal role in enhancing tools that top influencers use for building their personal brands. We’re specifically seeking someone who’s not just a coder but someone who thrives on transforming messy code into a well-structured, scalable framework. You’ll be diving into the nitty-gritty of refactoring and optimizing our codebase that runs on Next.js, Javascript, and Google Cloud Platform while having the chance to bridge both frontend and backend functions. Plus, your insights will directly influence product decisions, ensuring we balance speed and quality for our users. At lempire, we believe in flexibility and autonomy, giving you the freedom to work remotely with the bonus of having amazing offices in Paris if that’s your vibe. Not only will you have the chance to work with a no-nonsense team focused on achieving greatness, but as a key player, your contributions will shape the future of our products. If you’re ready to be part of a profitable, bootstrapped company where your growth equals our growth, we’d love to hear from you!

Frequently Asked Questions (FAQs) for Fullstack Developer – Taplio & TweetHunter Role at lempire
What are the key responsibilities of a Fullstack Developer at lempire?

As a Fullstack Developer at lempire, you’ll be tasked with refactoring and optimizing our codebase with Next.js, addressing both frontend and backend bugs, enhancing performance, and ensuring the maintainability of Taplio and TweetHunter tools. You'll also provide technical support for customer success and manage product requests effectively.

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What qualifications do I need for the Fullstack Developer position at lempire?

To be successful as a Fullstack Developer at lempire, you should have at least 3 years of experience, strong JavaScript and TypeScript skills, and proven ability in cleaning up messy code. You need to be a responsible coder who can recognize the bigger picture and make smart project trade-offs.

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What technologies will I work with as a Fullstack Developer at lempire?

In the Fullstack Developer role at lempire, you will be working predominantly with Next.js, Google Cloud Platform, and Javascript. Familiarity with APIs from Twitter and LinkedIn will be beneficial, as will strong skills in GCP.

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What is the work culture like for Fullstack Developers at lempire?

lempire offers a flexible and remote-friendly work culture allowing you to thrive in your environment, whether it's your home office or our fantastic Paris location. You'll collaborate with a motivated and straightforward team dedicated to growth and innovation.

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What benefits can I expect as a Fullstack Developer at lempire?

As a Fullstack Developer at lempire, you’ll enjoy comprehensive medical coverage, meal tickets, a fully-funded home office setup, profit-sharing opportunities, and access to great team-building events in exciting locations around the world.

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Common Interview Questions for Fullstack Developer – Taplio & TweetHunter
How do you approach refactoring messy code?

When refactoring messy code, I start with identifying critical areas that need restructuring or optimization. I prioritize enhancing readability and maintainability while ensuring that I preserve existing functionality. I also write tests to safeguard against regressions.

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Can you describe your experience with Next.js?

My experience with Next.js includes building scalable web applications with server-side rendering capabilities. I appreciate its ease of use for API routes and static generation, which greatly enhance performance and SEO. I have implemented various features including dynamic routing and incremental static regeneration.

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What techniques do you use for debugging front-end and back-end applications?

I utilize a variety of techniques for debugging, including using browser dev tools for front-end issues and logging errors in the console. For backend debugging, I often follow a systematic approach by isolating the components of the application to trace errors back to their source.

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How do you ensure the performance of a web application?

To ensure performance, I regularly monitor metrics such as loading times and bandwidth usage using tools like Google Lighthouse. I'll optimize assets, use caching strategies, and minimize API calls, ensuring the application operates smoothly.

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What do you think are the biggest challenges when working with APIs?

One significant challenge when working with APIs is handling rate limits and ensuring the application gracefully manages errors and retries. Additionally, keeping up with API version changes and ensuring that the integration remains stable is crucial.

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How do you stay updated with industry trends as a Fullstack Developer?

I stay updated by actively participating in developer communities, following thought leaders on platforms like Twitter and LinkedIn, and reading articles from established tech blogs. I’m also involved in online courses and webinars to continuously upgrade my skills.

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How do you approach collaborating with cross-functional teams?

When collaborating with cross-functional teams, I emphasize clear communication through regular updates and using project management tools for transparency. I also make it a point to be receptive to feedback and actively involve team members in the coding process.

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Can you explain a difficult technical problem you solved?

One difficult technical problem I faced involved optimizing a slow-loading component. I performed a performance audit, identified that too many unnecessary API calls were the issue, and refactored the code to batch requests, which significantly improved performance.

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What is your experience with version control systems like Git?

I have extensive experience with Git, utilizing it for version control in all of my projects. I ensure to commit my changes frequently with clear messages and have collaborated on repositories using branching strategies like Git Flow for organized feature development.

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What strategies do you use to manage your workload effectively?

To manage my workload effectively, I prioritize tasks based on deadlines and impact, breaking down large tasks into smaller, manageable ones. I also utilize agile methodologies for sprint planning, promoting a more organized approach to development.

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Full-time, remote
DATE POSTED
March 14, 2025

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