Senior Backend Engineer

Location: Remote job <h4><strong><span style="color:#000000">About Payflows</span></strong></h4><p><span style="color:#000000">At Payflows, we build software that helps large companies manage and automate their payment workflows. It’s not the flashiest part of a business, but it’s one of the most critical: invoices, approvals, payments, and controls. When these things slow down, the whole company feels it.</span></p><p><span style="color:#000000">But our ambition goes further than just building a better workflow tool.</span></p><p style="min-height: 1.7em;"></p><p><span style="color:#000000">We believe the future of finance operations is not faster clicking: it’s </span><strong><span style="color:#000000">no clicking at all</span></strong><span style="color:#000000"> 🫳&nbsp;🎤</span></p><p><span style="color:#000000">Finance teams shouldn’t spend their days moving data from one screen to another. Software should do the operational work, and humans should focus on reviewing, approving, and making the decisions that matter.</span></p><p><span style="color:#000000">That’s the direction we’re building toward: an </span><strong><span style="color:#000000">agent-driven finance platform</span></strong><span style="color:#000000">, where intelligent agents handle the repetitive tasks, and users stay in control.</span></p><p style="min-height: 1.7em;"></p><p><span style="color:#000000">We started in 2022 with a small team and a rough first version of the product. Three years later, we’re working with major companies across France, the UK, and the US while choosing to keep our team small and human-sized.</span></p><p><span style="color:#000000">We moved fast, shipped a lot, and not everything was built in a perfect way. But it helped us learn quickly, sign real customers, and prove that the problem we’re solving truly matters.</span></p><p style="min-height: 1.7em;"></p><p><span style="color:#000000">In 2024, investors trusted us with a $25M Series A. That gives us the chance to keep growing while also strengthening our foundations and building the system that will power this agent-driven future.</span></p><p style="min-height: 1.7em;"></p><p><span style="color:#000000">Today, we’re about 35 people from many different countries, and we’re looking for a few amazing humans to join the next chapter. 🤗</span></p><p style="min-height: 1.7em;"></p><p style="min-height: 1.7em;"></p><h4><strong><span style="color:#000000">🚀 What you’ll actually do</span></strong></h4><p><span style="color:#000000">You’ll help build a product that real finance teams rely on every day.</span></p><p><span style="color:#000000">For us, engineering is not just about clean code, it’s about reliability, clarity, and trust, especially when money and automation are involved.</span></p><p style="min-height: 1.7em;"></p><p><span style="color:#000000">In a typical week, you might:</span></p><ul><li><p><span style="color:#000000">Design and implement new services for a product feature.</span></p></li><li><p><span style="color:#000000">Refactor an early service to make it more robust.</span></p></li><li><p><span style="color:#000000">Investigate a performance or production issue.</span></p></li><li><p><span style="color:#000000">Work with product and frontend to shape a new feature.</span></p></li><li><p><span style="color:#000000">Review code and help teammates improve.</span></p></li><li><p><span style="color:#000000">Build backend tools that our AI agents use to perform real finance operations.</span></p></li><li><p><span style="color:#000000">Design safe, deterministic workflows where agents propose actions and humans review them.</span></p></li></ul><p style="min-height: 1.7em;"></p><p><span style="color:#000000">Your time will be split between </span><strong><span style="color:#000000">building new features</span></strong><span style="color:#000000"> and </span><strong><span style="color:#000000">improving what already exists</span></strong><span style="color:#000000">. Both matter.</span></p><p><span style="color:#000000">You won’t just build endpoints. You’ll help shape the </span><strong><span style="color:#000000">execution layer</span></strong><span style="color:#000000"> that our agents rely on: the APIs, data models, and workflows that let them act safely in production.</span></p><p><span style="color:#000000">You’ll work closely with product, frontend, and customer-facing teams. We expect engineers to take ownership of parts of the system and help make them more reliable over time.</span></p><h4></h4><h4><span style="color:#121317">💻</span><strong><span style="color:#000000"> Our current tech reality</span></strong></h4><p><span style="color:#000000">Our stack evolves based on our challenges, but we care more about good design than trendy tools 🙏</span></p><p><span style="color:#000000">Python is our core language. It helps us move fast, keep the code readable, and fits naturally with our AI-driven approach. A growing part of the system is built around agents that use our backend as a set of reliable, deterministic tools.</span></p><ul><li><p><strong><span style="color:#000000">Core language:</span></strong><span style="color:#000000"> Python</span></p></li><li><p><strong><span style="color:#000000">Backend:</span></strong><span style="color:#000000"> FastAPI + Pydantic</span></p></li><li><p><strong><span style="color:#000000">Data:</span></strong><span style="color:#000000"> PostgreSQL</span></p></li><li><p><strong><span style="color:#000000">Infra:</span></strong><span style="color:#000000"> AWS, serverless when it makes sense</span></p></li><li><p><strong><span style="color:#000000">Performance:</span></strong><span style="color:#000000"> some Rust for critical paths</span></p></li><li><p><strong><span style="color:#000000">Architecture:</span></strong><span style="color:#000000"> multi-service backend, simple enough to reason about</span></p></li></ul><p style="min-height: 1.7em;"></p><p><span style="color:#000000">Some parts of the system are clean and well-tested. Others were built quickly and need love. That’s the phase we’re in.</span></p><p><span style="color:#000000">Over the next year, we’ll focus on:</span></p><ul><li><p><span style="color:#000000">Turning core workflows into reliable tools for our agents</span></p></li><li><p><span style="color:#000000">Simplifying services</span></p></li><li><p><span style="color:#000000">Improving tests and observability</span></p></li><li><p><span style="color:#000000">Making performance more predictable</span></p></li><li><p><span style="color:#000000">Cleaning up early code</span></p></li></ul><p><span style="color:#000000">We know we’re not perfect, but we care a lot about improving step by step.</span></p> <br> <h4><span style="color:#121317">✨</span><strong><span style="color:#121317"> Who’s going to thrive with us</span></strong></h4><p><strong><span style="color:#121317">You’ll probably feel comfortable here if:</span></strong></p><ul><li><p><span style="color:#121317">You like building products people actually use.</span></p></li><li><p><span style="color:#121317">You are autonomous and take ownership of what you ship.</span></p></li><li><p><span style="color:#121317">You take initiative and lead by example.</span></p></li><li><p><span style="color:#121317">You’re curious and enjoy figuring things out.</span></p></li><li><p><span style="color:#121317">You’re pragmatic about trade-offs.</span></p></li><li><p><span style="color:#121317">You communicate with kindness and clarity.</span></p></li></ul><p style="min-height: 1.7em;"></p><p><strong><span style="color:#121317">This role is a great fit if you’re excited by the idea of:</span></strong></p><ul><li><p><span style="color:#121317">Building systems that are used by AI agents, not just humans.</span></p></li><li><p><span style="color:#121317">Designing reliable, safe automation in production.</span></p></li><li><p><span style="color:#121317">Working on a product that is still early and evolving quickly.</span></p></li></ul><p><span style="color:#121317">You don’t need to know everything about AI. But you should be curious about it and excited to work in a system where agents are part of the core product 🤖</span></p><p style="min-height: 1.7em;"></p><h4><strong><span style="color:#121317">🧩 What you’ll get from this role</span></strong></h4><ul><li><p><span style="color:#121317">Real ownership over parts of the system.</span></p></li></ul><ul><li><p><span style="color:#121317">Direct impact on customers and product decisions.</span></p></li><li><p><span style="color:#121317">A small, human team where your work is visible and meaningful 🤝</span></p></li><li><p><span style="color:#121317">A mix of feature work, system design, and technical improvements.</span></p></li><li><p><span style="color:#121317">Exposure to real scaling and production challenges.</span></p></li><li><p><span style="color:#121317">The chance to help build an agent-driven product from the inside.</span></p><p style="min-height: 1.7em;"></p></li></ul><p><strong><span style="color:#121317">We offer:</span></strong></p><ul><li><p><span style="color:#121317">Competitive salary and equity.</span></p></li><li><p><span style="color:#121317">Flexible remote setup (we only ask you to be at the office the first 3 days of each month).</span></p></li><li><p><span style="color:#121317">A high-autonomy environment where you have real ownership and space to make an impact.</span></p></li><li><p><span style="color:#121317">Plenty of room to grow, take responsibility, and shape parts of the product.</span></p></li><li><p><span style="color:#121317">A culture based on trust, ownership, and clear communication.</span></p></li></ul><p style="min-height: 1.7em;"></p><p><span style="color:#121317">This isn’t a huge corporate environment. In exchange, you get autonomy, responsibility, and the chance to shape a product that’s still early in its story—and help build what finance operations will look like in the next decade 🚀</span></p><p style="min-height: 1.7em;"></p><p>Find <a href="[Link Protected] in France</a> on Arbeitnow</a> GDPR Compliance: Sourced via verified public channels under Legitimate Interests (Art. 6(1)(f) GDPR). [Contact Info Protected]

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