backend software engineer in payments

Spirii provides hardware and software charging solutions to private- and public-sector companies. It develops EV charging products and digital solutions, including an EV charging platform and business services.

• Design, build, and maintain scalable, secure backend services and cloud-native queue-based pipelines for data ingestion, processing, and invoice generation
• Ensure data quality through accurate aggregation and safe handling of late or updated records
• Build and maintain integrations with internal services and the ERP system
• Contribute to architectural decisions and solution design for cloud-native, distributed, event-driven systems on AWS
• Drive automated testing and observability to protect billing accuracy and detect data discrepancies early
• Mentor engineers and raise the team’s technical standards through code reviews, pairing, and constructive feedback
• Operate independently on ambiguous, cross-team problems with minimal oversight
• Use AI coding assistants and agentic workflows to accelerate development, automate repetitive tasks, and support safe AI adoption in a financially sensitive codebase

• Bachelor’s degree in Computer Science, Software Engineering, a related field, or equivalent experience
• 7+ Years of professional software development experience
• Extensive hands-on experience designing and scaling production backend systems, including event-driven and queue/job-based architectures
• Strong experience building TypeScript or JavaScript microservices with Node.js and NestJS on cloud platforms such as AWS
• Experience leading design discussions, mentoring engineers, or serving as a technical point of contact for a team or domain
• Hands-on experience with test-driven development, test automation, integration testing, and load testing
• Strong SQL and data-modelling skills, with the discipline needed for financially accurate, auditable data
• Experience integrating external and internal IT systems, and solid API design skills
• Fluent English communication skills; able to interact with all organizational levels and with external partners and customers
• Будет плюсом: secure software development, Redis, NoSQL databases, ERP integrations such as Microsoft Business Central, billing, payments, invoicing or other financial/transactional systems, AI assistants or agentic workflows to improve engineering productivity

• Competitive salary, an 11% company pension plan, and a comprehensive benefits package
• 32 Paid vacation days (5 weeks + 5 extra) and paid parental leave
• Flexible working hours and a focus on work-life balance
• Professional development opportunities
• Free coffee, tea, and snacks, subsidized lunches at the office, access to the Spirii gym, and a shared company car
• Two innovation days per month to choose what to work on
• Permanent position in Copenhagen, Denmark