---
title: "Senior Software Engineer… at Flatpay ApS – Herlev, Denmark"
canonical: "https://www.metaintro.com/job/senior-software-engineer-online-at-flatpay-aps-4021f36c-5d67-53c2-b65c-221102ad700e"
language: "en"
author: "Metaintro"
---

[/company/flatpay-aps](/company/flatpay-aps)[Flatpay ApS](/company/flatpay-aps)
# Senior Software Engineer, Online at Flatpay ApS

Department: Tech

LanguageEnglish
Dansk

**Setup**
: On-site

**Location**
: Herlev, Capital Region of Denmark

**Type**
: Full-time

**Level**
: senior

**Posted**
: Oct 1, 2026

## Description

Flatpay is hiring a Senior Software Engineer to define the technical direction and architectural foundations of its online payments platform. The role involves designing and building scalable backend systems, APIs, services, and integrations; leading multi-engineer initiatives; improving reliability, observability, performance, and security; and mentoring engineers. The position requires 7+ years of professional software engineering experience, distributed-systems expertise, and experience with scalable backend platforms and APIs, with a focus on Java, Spring Boot, TypeScript, React, AWS, and related technologies. The work is based in the Copenhagen office.

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