Senior Backend Engineer - Payments and Cloud (Node.js/AWS)

Spirii ApS; København; On-site; DKK 900,000 - 1,300,000; Full time

Benefits offered by this job

Flexible Work Environment

Competitive Salary + Pension

32 vacation days

Career Growth

Office coffee & snacks

Gym access & company car

Innovation days

Job summary

Spirii ApS in Copenhagen is seeking a Backend Software Engineer for the Payments team to design, build, and maintain scalable backend services using Node.js, NestJS, and TypeScript that power the data ingestion, processing, and invoice generation.

You'll contribute to cloud-native, secure, scalable, queue-based processing on AWS, ensuring financial accuracy and data integrity for invoices and payouts while collaborating across Finance and partner teams.

Qualifications

• 7+ years of professional software development experience.
• Strong experience with TypeScript or JavaScript (Node.js, NestJS) and cloud-based microservice architectures.
• Hands-on with test-driven development, API design, and secure software practices.

Responsibilities

• Design, build, and maintain scalable backend services powering invoice, credit memo, and payout flows.
• Develop cloud-native, event-driven architectures on AWS and reliable queue-based processing.
• Ensure financial data integrity with accurate aggregation and auditability.
• Collaborate with ERP integrations and internal teams; participate in code reviews and testing.
• Advocate for AI-assisted development and modern engineering practices.

Skills

TypeScript

JavaScript

Node.js

NestJS

AWS

SQL

NoSQL

Redis

APIs

Education

Bachelor's degree in Computer Science or related field

Tools

Microsoft Dynamics 365 Business Central

Job description

Spirii ApS in Copenhagen is seeking a Backend Software Engineer for the Payments team to design, build, and maintain scalable backend services using Node.js, NestJS, and TypeScript that power the data ingestion, processing, and invoice generation.

You'll contribute to cloud-native, secure, scalable, queue-based processing on AWS, ensuring financial accuracy and data integrity for invoices and payouts while collaborating across Finance and partner teams.