Software Engineer, Online Payments Platform

Hub; Herlev Kommune; On-site; DKK 700,000 - 1,100,000; Full time

Benefits offered by this job

Onsite gym

Gamer room

Free snacks and perks

Job summary

Flatpay in Copenhagen is hiring a Software Engineer to design, develop, and maintain online commerce and payments platforms. You will build merchant- and customer-facing features, APIs, and services, taking ownership from design to deployment.

You’ll work across backend and frontend, with Java/Spring Boot, MySQL, TypeScript, React, and cloud technologies, collaborating with product managers and other engineers to deliver real customer value.

Qualifications

• 3–6 years of professional software engineering experience.
• Experience building and operating production systems.
• Comfortable working across modern backend and cloud technologies.
• Strong understanding of software engineering fundamentals.
• Curious, pragmatic, and eager to learn.
• Enjoy taking ownership and solving real customer problems.
• Experience with payments, e-commerce, SaaS platforms, or fintech is a plus.

Responsibilities

• Design, develop, and maintain software solutions for online commerce and payments.
• Build new merchant- and customer-facing features, APIs, and services.
• Take ownership of features from design and implementation through deployment and maintenance.
• Improve the reliability, scalability, and performance of existing systems.
• Collaborate with product managers and designers to deliver customer value.
• Participate in technical discussions, code reviews, and architecture decisions.
• Contribute to testing, deployment, and operational excellence.
• Work closely with other engineering teams across Flatpay to build integrated solutions.
• Help improve engineering practices, tooling, and development workflows.

Skills

Java

Spring Boot

MySQL

REST APIs

Domain Driven Design

Cloud technologies

Ownership mindset

Tools

Docker

AWS

GitHub Actions

CI/CD

AWS ECS

Observability

Job description

Flatpay in Copenhagen is hiring a Software Engineer to design, develop, and maintain online commerce and payments platforms. You will build merchant- and customer-facing features, APIs, and services, taking ownership from design to deployment.

You’ll work across backend and frontend, with Java/Spring Boot, MySQL, TypeScript, React, and cloud technologies, collaborating with product managers and other engineers to deliver real customer value.