Python Backend Developer

Python Backend Developer Python · React · SaaS · Accounting Automation 40 hours · Hybrid · Den Haag HS · Medior / Senior · €4,000–€6,000/month Join our mission to "Keep accountants relevant in the age of AI" AI promises to transform almost every profession. Accounting is no exception. At Aspyre, our goal is not to replace accountants, but to make them 4x more productive, allowing accounting firms to grow far beyond their current customer base without growing their headcount at the same pace. We do this by connecting to the software accountants already use and automating high-effort, low-revenue work. We combine auditable, deterministic software with AI, using each where it works best. Our current product is already being used by early customers. Now we're entering the next phase: turning it into a stable, fast and scalable platform that accounting firms can rely on every day. That’s where you come in. What you'll be working on As a Python Backend Developer at Aspyre, you'll work across the product, with a strong focus on our backend and platform architecture. You'll: Evolve our architecture into a scalable, production-ready platform.Build clear boundaries between our data/integration, business logic and output layers.Develop new functionality.Build and maintain integrations with accounting platforms and other external APIs.Design and optimize our PostgreSQL data layer.Improve performance, reliability and scalability.Turn real accounting workflows into robust software.Contribute to technical and architectural decisions.We care about engineering quality, but we're also a startup. That means understanding when something deserves careful engineering and when getting something into users' hands matters more. What we're looking for You have: Strong Python skills and a solid understanding of OOP.Experience building backend applications, APIs and services.Practical experience with databases, data modeling and query optimization.Experience with REST APIs and modern web frameworks such as FastAPI.A solid grasp of testing, debugging, version control and code review.The ability to translate business processes into technical solutions.The confidence to work independently while collaborating closely with others.A Bachelor's degree in Computer Science, Software Engineering, or equivalent practical experience.Experience with React, AI, automation, fintech or accounting software is a plus. You must be able to work from our office in The Hague at least two days per week. The kind of developer we'd like to work with You enjoy solving technically difficult problems with people you can trust and laugh with. You're ambitious about becoming better at what you do, but don't need to prove you're the smartest person in the room. You ask questions, challenge assumptions and expect others to challenge yours. Your ideas will be heard, and your work will matter. You'll regularly see things you've built running in production and being used by real customers. Aspyre probably isn't the right environment if you're looking for rigid specifications to simply execute, or if you believe seniority means your ideas shouldn't be questioned. What you can expect from us An energetic, young startup where your work has a visible impact.Challenging technical problems with plenty of room for ownership.A healthy environment where we work hard without taking ourselves too seriously.Direct contact with users and the problems we're solving.A competitive salary of €4,000–€6,000 per month, depending on relevant experience. Practical details Hours: 40 hours per week Location: Den Haag HS Hybrid: Tuesday & Thursday in the office; remaining days from home (or the office, choice is yours) Level: Medior / Senior How to apply Don't spend hours writing us a ceremonial motivation letter. Tell us who you are, why you do what you do, what makes you happy in life, and what about Aspyre caught your interest. Most importantly, we'd like to see what you've actually built. Send your CV together with: Your LinkedIn profileYour GitHub profileA portfolio or examples of projects/products you've worked onA short explanation of something you've built that you're particularly proud of—what your contribution was and why you made the technical decisions you did Send your application to Arnout@aspyre.nl.