
Transforming B2B payments for a seamless experience
Upflow is a fintech company headquartered in Saint-Mandé, IDF, specializing in Financial Relationship Management solutions for B2B businesses. With $23.3 million in Series A funding, Upflow aims to transform the payment experience by integrating seamlessly with accounting platforms like Xero and Qui...
Employees enjoy top-of-the-range equipment, a remote-friendly work environment, free lunches, comprehensive healthcare, and share options....
Upflow fosters a user-first culture, focusing on simplifying the payment process for B2B businesses. The company is committed to innovation in the pay...

Upflow • Paris Office
Upflow is seeking a Senior Full Stack Engineer to architect and implement high-impact product features. You'll work with technologies like JavaScript, React, and Node.js in a fast-growing Fintech environment based in Paris.
You have 5+ years of experience in full stack development, with a strong foundation in both frontend and backend technologies. You are proficient in JavaScript and have hands-on experience with frameworks such as React and Node.js. Your background includes working in a product-led environment, where you have successfully collaborated with product managers and designers to translate business requirements into technical solutions. You are comfortable with continuous deployment practices and understand the importance of shipping clean, maintainable code. You thrive in a team-oriented atmosphere and are eager to contribute to a culture of ownership and growth. You are also open to learning and adapting to new technologies, especially in the realm of AI, as you will play a key role in enhancing Upflow's product offerings.
Experience with payment processing systems or workflow automation is a plus. Familiarity with AI technologies and their application in product development will be beneficial. You should also have a growth mindset and be willing to mentor junior engineers as the team expands.
In your role, you will architect and implement complex product features from start to finish, ensuring they meet the needs of our users. You will collaborate closely with the product manager, designer, and other engineers to create high-impact solutions that enhance our cash collection technology. Your responsibilities will include writing clean, maintainable code, conducting code reviews, and participating in the continuous deployment process, which averages 10 deploys per day. You will also engage in discussions about product direction and contribute to the overall strategy of the engineering team. As part of a small, efficient team, you will have the opportunity to take ownership of your projects and drive them to completion, while also learning from your peers and sharing your knowledge.
At Upflow, we provide a dynamic work environment where innovation is encouraged. You will have the chance to work with cutting-edge technology in the Fintech space and contribute to a product that helps B2B companies get paid faster and simpler. We value diversity and encourage all individuals to apply, even if they don’t meet every qualification. Our team is backed by leading investors and offers a supportive culture that emphasizes growth and collaboration. We also provide flexible working arrangements, allowing you to work from our Paris office or remotely, depending on your preference.
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