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Senior Backend Engineer (Golang) fiskaly · Vienna, Vienna, Austria; Vienna, Vienna, Austria; Warsaw, Mazowieckie, Poland
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fiskaly

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Senior Backend Engineer (Golang)

🗓️ Posted 2026-10-02 Vienna, Vienna, Austria; Vienna, Vienna, Austria; Warsaw, Mazowieckie, Poland Hybrid ICT
💰 Salary Not shared 📊 Market 4,500 EUR–6,500 EUR/mo

About the Company

VAT compliance at scale. Secure, cloud-based solutions for POS vendors, PMS, ERP systems and retailers across Europe. fiskaly provides cloud-based solutions for VAT compliance across Europe. We are a 150-person team operating across eight markets - Germany, Austria, Spain, Italy, France, Sweden, Portugal, and Belgium - each with its own regulatory logic to master. Our services cover the full compliance lifecycle: tamper-proof transaction signing at the point of sale, digital receipts, audit-ready archiving, and digital reporting and e-invoicing. Today, more than 1 million POS systems and 1,900+ customers - from POS vendors, PMS systems, ERP systems to omni-channel retailers - run on fiskaly infrastructure. As fiscal regulation expands across the EU, we're scaling the markets we cover in step. Software Development Specialties: fiscalization, VAT compliance, e-invoicing, API

Responsibilities

  • ● Job Title: Senior Backend Engineer (Golang)
  • ● Languages: English (Fluent)
  • ● 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 .
  • ● 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
  • ● Architect for Scale: Design and build resilient, high-performance microservices using Golang, taking full ownership from architecture to deployment (End-to-End).
  • ● AI-Augmented Engineering: Leverage AI-assisted development tools (e.g., GitHub Copilot, generative AI) to speed up boilerplate creation, write robust unit tests, and auto-generate documentation so you can focus on complex business logic.
  • ● Continuous Delivery: Embrace a "Continuous Everything" (GitOps) approach, deploying code multiple times a day with absolute confidence thanks to automated testing and monitoring pipelines.
  • ● Evolve the Platform: Design the unified interface for our services, ensuring our APIs are intuitive, strictly typed, and self-documenting.
  • ● Innovate with ML/AI: Integrate AI and ML capabilities directly into our platform where it adds high value, such as anomaly detection in transaction logs or automated error classification.
  • ● Lead & Mentor: Mentor junior developers-not just on Go syntax, but on how to be highly efficient, tool-augmented engineers in a modern, automated cloud environment.
  • ● What You Bring
  • ● Deep Go Expertise: 5+ years of full-time Backend Development experience, with a strong preference for Golang and a deep understanding of OOP/SOLID principles.
  • ● Distributed Systems Mastery: You deeply understand the fallacies of distributed computing, eventual consistency, and exactly how to build fault-tolerant architectures.