Senior Fullstack TS Developer (backend-oriented)

Lemlist SAS

Job Overview

Location

Rennes

Job Type

Full-time

Full Job Description

📋 Description

• Senior Fullstack TS Developer (backend-oriented) role at Lemlist SAS, a profitable B2B SaaS company valued at $150M with $54M ARR, trusted by 40,000+ sales teams worldwide. You will design and develop new features for SaaS products, working independently on both frontend and backend using TypeScript and Node.js.
• Day to day responsibilities include designing and developing new features from scratch, improving the codebase through refactoring and bug fixes, working on multiple projects simultaneously, assisting customer support with technical issues, and training fellow developers to enhance team competency.
• Lemlist SAS is a bootstrapped, high-growth, profitable company that values autonomy, innovation, and technical excellence. The team is passionate, senior-engineer-led, and emphasizes ownership, minimal meetings, and full remote work with global team building events.
• In this role, you will gain deep expertise in B2B SaaS product development, contribute to scalable and optimized software systems, lead multiple successful projects within 12 months, and grow professionally through knowledge sharing, autonomous problem-solving, and exposure to full-stack challenges in a fast-moving environment.

🎯 Requirements

• Expert in TypeScript/JavaScript with at least 5 years of experience
• Proven track record in building and maintaining web applications
• Robust understanding of Node.js and MongoDB
• Ability to work independently and take ownership of complex projects
• Comfortable with agile methodologies and strong communication skills
• Fluency in French and English, availability in French timezone (±3 hours)

🏖️ Benefits

• Salary between 55K€ and 70K€ fixed + 18K€ bonus
• Profit sharing: team members share company profits
• Alan Blue: 100% premium medical coverage for employee and family
• Swile Meal Tickets: daily meal tickets for productivity
• Navigo Card: 100% covered public transport commuting
• Full-remote work setup: funded home office budget, MacBook Pro + tools provided
• Annual team building events at global destinations

Skills & Technologies

JavaScript

TypeScript

Node.js

MongoDB

Backend

Senior

Remote

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Lemlist SAS

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About Lemlist SAS

Lemlist SAS operates a cloud-based sales automation platform that combines email outreach, LinkedIn engagement, and multichannel sequencing. Founded in France in 2018, the company provides tools for personalized cold email campaigns, deliverability optimization, dynamic landing pages, and CRM integrations. Its software enables B2B sales teams to automate follow-ups, track metrics, and manage lead lists while maintaining personalized messaging. Serving startups to enterprises globally, Lemlist emphasizes human-centric automation and maintains GDPR compliance across its European infrastructure.

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