Senior Backend Engineer (Golang)

Job Details

• Job Title: Senior Backend Engineer (Golang)
• Location: Preferably in / near Vienna, or within a 2h time zone difference
• Languages: German (fluent) & English
• Experience: Over 5 years of experience in backend development using Golang and other OOP languages, you will contribute to our SaaS platform, managing the full software lifecycle
• Salary: €45,000 - €70,000 gross/year
• Contract: No freelancing, full time

🚀 Who We Are

Millions of people interact with fiskaly every day, even if they don’t realize it. As a B2B company, we power the retail technology behind digital receipts and secure, legally compliant transactions.

By making receipts tamper-proof through digital signatures, we help fight tax fraud. And with our paperless receipt solution, we offer consumers a modern alternative while helping merchants streamline their operations.

Sure, our solutions sound complex but our mission is simple: make receipts easy for everyone.

🎯 The Role

You are a Senior Backend Engineer, but we view you as a System Architect. You will join a high-performing squad responsible for our API-first SaaS solutions.

Your job is not just to write lines of code; it is to deliver value. We expect you to use every tool in the modern arsenal—including AI coding assistants and automation—to bypass the repetitive parts of software development. This allows you to focus 100% of your brainpower on complex distributed system problems, architecture, and reliability. You will shape the future of our unified interface and ensure our fiscalization platform scales effortlessly.

🛠️ What You’ll Do

• Design and build resilient, high-performance microservices using Golang, taking full ownership from architecture to deployment (End-to-End)
• Embrace a "Continuous Everything" (GitOps) approach, deploying code multiple times a day with confidence thanks to automated testing and monitoring pipelines
• Leverage AI-assisted development tools (e.g., Copilot, code generation) to speed up boilerplate creation, unit test writing, and documentation, allowing you to focus on complex business logic
• Design and evolve the unified interface for our services, ensuring our APIs are intuitive, strictly typed, and self-documenting
• Integrate AI and ML capabilities into our platform where it adds value, such as anomaly detection in transaction logs or automated error classification
• maintain high-quality documentation that supports both internal teams and external developers, using automation to keep it in sync with the code
• Mentor junior developers not just on Go syntax, but on how to be an efficient, tool-augmented engineer in a modern cloud environment

✨ What You Bring

• 5+ years of full-time Backend Development experience, with a strong preference for Golang and a deep understanding of OOP/SOLID principles
• A mastery of Distributed Systems: You understand the fallacies of distributed computing, eventual consistency, and how to build fault-tolerant architectures
• A "Force-Multiplier" Mindset: You have experience (or a strong interest) in using AI tools to enhance software quality and velocity. You don't just write code; you architect solutions that generate code
• Practical experience with Docker and Kubernetes. You aren't just an app developer; you know how your code lives in the cluster
• Deep knowledge of RESTful and RPC-based APIs, and you treat API design as a first-class citizen
• Familiarity with asynchronous message systems (RabbitMQ, Kafka, PubSub) and knowing when to use them versus synchronous calls
• Experience with cloud platforms (GCP preferred) and modern database strategies (relational vs. NoSQL)
• You are a clear communicator who can explain complex abstract concepts to both technical and non-technical stakeholders

💡 What We Offer

• A culture that encourages you to use the latest tech. If an AI tool helps you code 20% faster, we want you to use it
• A supportive environment where you can try new things, fail safely, and learn constantly
• Flexible working hours and a hybrid work arrangement (Office in Vienna/Berlin/Madrid/Milan or Remote)
• Work permit sponsorship for qualified candidates
• A dedicated budget for personal and professional development and regular 1:1 career planning
• Company hardware of your choice (Windows, Linux, or Mac)
• A vibrant, inclusive company culture that values your well-being and personal growth