---
title: "Senior Software Engineer"
company: "Fonoa"
company_url: "https://www.remjobs.works/companies/fonoa"
url: "https://www.remjobs.works/job/fonoa-senior-software-engineer-1bd9e2df-a401-4662-898e-999bd836769e"
apply_url: "https://jobs.ashbyhq.com/fonoa/ea772eb4-853c-4a65-a1f9-9ddcaef0aa8b"
workplace: hybrid
location: "Zagreb, Croatia"
employment_type: full-time
seniority: senior
role: software-engineering
region: europe
skills: ["gcp", "kubernetes", "llm", "nodejs", "postgres", "react", "terraform", "typescript"]
date_posted: 2026-08-26T13:20:35.960Z
first_seen_by_remjobs: 2026-09-04T17:42:31.039Z
---

# Senior Software Engineer

**Fonoa** · Zagreb, Croatia

Apply: https://jobs.ashbyhq.com/fonoa/ea772eb4-853c-4a65-a1f9-9ddcaef0aa8b

## About Fonoa

Made for e-businesses managing indirect taxes. Built for the requirements of the future. Validate tax IDs, calculate taxes, generate e-invoices, report & file your tax returns.

## About the role

#### About Engineering at Fonoa

Engineering is central to how we build the business. We focus on solving **real customer problems**, not just shipping features. We work in **small, high-trust teams**, with full ownership across the lifecycle, from design to production and beyond.

We value:

- Ownership – engineers own what they build end-to-end

- Simplicity – we break down complex problems into clear solutions

- Thinking Big - we innovate with modern technologies (LLMs, AI Agents, etc.) to solve meaningful problems

- Quality – scalable, maintainable systems are non-negotiable

- Speed & iteration – we ship fast, learn, and improve continuously

- Collaboration – we win as a team, not as individuals

#### Position Overview

As a **Staff Engineer**, your role is to **improve the system as a whole, both technically and organizationally**.

You will work on **ambiguous, high-impact problems**, shape technical direction across teams, and help others build better systems. Your impact comes less from the code you write, and more from **how you influence decisions, design, and execution at scale**.

#### What You Will Do

- Take ownership of complex, cross-team problems that are not clearly defined

- Define technical direction and drive system design across domains

- Identify and address systemic issues and opportunities early

- Simplify complexity through better architecture, patterns, and structure

- Improve how teams build by raising standards, tooling, and practices

- Mentor engineers and contribute to hiring and team growth

- Ensure systems are reliable, scalable, and built for long-term evolution

#### What Good Looks Like

- You focus on high-leverage problems and shape how they are approached

- You create clarity in ambiguous situations and align teams around it

- You improve not just code, but how teams design and build systems

- You make others more effective through guidance, feedback, and direction

- You operate with long-term thinking, balancing today’s needs with future scale

- You adopt emerging AI technologies and create a culture of innovation in your teamsAt this level, you are expected to **“make the whole system, and the people in it, better.”**

#### What We’re Looking For

- Strong experience designing and operating scalable backend systems

- Proven ability to work on ambiguous, high-impact problems

- Track record of influencing technical decisions beyond your team

- Ability to balance speed, quality, and long-term maintainability

- Experience mentoring engineers and improving team practices

- Fostering a culture of curiosity and experimentation

#### API Documentation

For engineers, API design and structure are an important part of evaluating a role. You can explore our API and how we build products here: [https://docs.fonoa.com/](https://docs.fonoa.com/)

#### Tech Stack

We use these technologies today, but we don’t hire for specific tools. We care about engineers who can **understand problems, make good technical decisions, and choose the right tools for the job**.

- Backend: Node.js, Go

- Frontend: React, TypeScript

- Infrastructure: GCP, k8s, Terraform, PostgresNote: 
If you don’t think you have the full experience we’re looking for, but you could be a fit and are willing to learn, do apply anyway! We are building a diverse and inclusive team.

*As part of the recruitment process at Fonoa, we process your personal data in accordance with our *[Privacy Notice for Job Applicants](https://www.fonoa.com/legal/privacy-notice-job-applicants)*. This notice explains how and why your data is collected and used, and how you can contact us if you have any concerns.*

---

Source: Fonoa's own career page, read by RemJobs. Canonical HTML version: https://www.remjobs.works/job/fonoa-senior-software-engineer-1bd9e2df-a401-4662-898e-999bd836769e