Senior Full Stack Engineer

<p style="min-height:1.5em"><em>Updated in October 2026</em></p><p style="min-height:1.5em"></p><p style="min-height:1.5em"><strong>Target start date: March 1, 2027</strong></p><p style="min-height:1.5em"><strong>Compensation: 70,000 to 85,000 EUR yearly gross, depending on profile</strong></p><p style="min-height:1.5em"><strong>Location: Either in-office in Paris (Grands Boulevards, 75002) or full remote on Paris timezone</strong></p><div style="min-height:1.2em;margin-top:0px;margin-bottom:0px"> </div><div style="min-height:1.2em;margin-top:0px;margin-bottom:0px"> </div><p style="min-height:1.5em"></p><h2><strong>About Upflow</strong></h2><div style="min-height:1.2em;margin-top:0px;margin-bottom:0px"> </div><p style="min-height:1.5em">Upflow is the Financial Relationship Management (FRM) platform that helps B2B finance teams collect smarter and get paid by their customers faster, with AI agents working alongside the team.</p><p style="min-height:1.5em">Today, the order-to-cash process is mission critical for businesses, yet it remains fragmented across tools, teams, and workflows. Upflow brings this entire process into one system — four products covering the cycle from invoice to cash (Insights, Collections, Payments, and Cash Application), with AI agents that work alongside the team and a shared intelligence layer underneath.</p><p style="min-height:1.5em">We serve 500+ companies across 30+ countries, including Vercel, Lattice, and Productboard, and are backed by leading investors including Y Combinator, Hedosophia, Hexa, and Lorimer. With teams across the US and Europe, we're building a category-defining company at the intersection of finance, payments, and AI.</p><p style="min-height:1.5em">To learn more about what we do, visit <a target="_blank" rel="noopener noreferrer nofollow" href="http://upflow.io">upflow.io</a>.</p><p style="min-height:1.5em">For a behind-the-scenes look at how we work as a team, head to the Inside Upflow section of our blog at <a target="_blank" rel="noopener noreferrer nofollow" href="http://upflow.io/blog/inside-upflow">upflow.io/blog/inside-upflow</a></p><p style="min-height:1.5em"></p><h2><strong>About the role</strong></h2><p style="min-height:1.5em"></p><p style="min-height:1.5em">You’ll join a small, efficient team who builds high-impact features for our users. You'll work on a wide range of topics, including AI agents, workflow automations, analytics, or payment processing. We invest significantly in AI features, and you'll play a key role in making Upflow the leading agentic software in our field.</p><p style="min-height:1.5em">We work at a fast pace, averaging 20 deploys to production each day, but with high quality standards, and we value pragmatism, ownership, and a growth mindset.</p><p style="min-height:1.5em">AI is also transforming how we work, and we're looking for someone eager to use and optimize agents to help us work more efficiently.</p><p style="min-height:1.5em">You can be based in our Paris office or work remotely.</p><p style="min-height:1.5em"></p><h2><strong>What you will do</strong></h2><p style="min-height:1.5em"></p><p style="min-height:1.5em">In your day-to-day, you will:</p><ul style="min-height:1.5em"><li><p style="min-height:1.5em&