Lead Developer / Software Architect for Cash Management Billing Solution (f/m/x)

About

We are building a modern billing platform to replace a 12 year old billing solution used by Corporate & FI customers across the group. The new platform will be cloud-native, hosted on AWS and deployed to our Kubernetes environment. It is being developed with a Java Spring backend, Angular frontend and PostgreSQL. We follow an API-first approach, spec-driven development (SpecKit / bMAD) and embrace AI-augmented development practices to increase productivity and quality.

Your mission:

• Own the technical vision and system architecture for the billing platform; design clear module boundaries and a modular architecture.
• Lead a small engineering squad (you + 2 developers) and work closely with 2 BAs, QA/test automation and DevOps.
• Hands-on development in Java Spring; design and maintain REST APIs/OpenAPI specs (API-first).
• Drive Spec-driven Development workflows (SpecKit/bMAD), introduce AI-assisted tools for spec, code and test generation.
• Define and enforce CI/CD, observability, security, performance and deployment patterns for AWS + Kubernetes.
• Perform code reviews, mentor team members, run architecture / design sessions and coordinate with stakeholders.

Your core competencies:

• University degree in Computer Science or equivalent experience.
• 8+ years software development experience; 3+ years as a technical lead / software architect.
• Strong expertise in Java Spring, REST/OpenAPI design, PostgreSQL and cloud-native patterns.
• Practical experience with Kubernetes, Docker, AWS and CI/CD toolchains (e.g., GitHub Actions, Jenkins, ArgoCD) and Helm.
• Familiarity with Angular (collaborating with frontend), test automation practices and DB design/performance tuning.
• Experience with spec-driven development tools (SpecKit / bMAD) or similar is highly desirable.
• Proven experience in designing secure, performant systems in regulated environments (banking/payments/billing is a plus).
• Fluent English (spoken and written), German is a plus.
• Structured, mentoring mindset and strong stakeholder communication skills.

What´s in it for you:

• High impact & modern tech: Shape a core RBI product for Corporate & FI customers, built on a cloud native stack (AWS, Kubernetes) with AI augmented development and room to introduce best practices.
• Flexible work week: Flexible hours, work-from-home options from Austria, and 30 days/year remote work from any EU country.
• Global community: 75+ nationalities, English as the company language, and work permit support. Find out more about international applications here.
• Career growth: We believe in continuous learning and proactive career development. Take on challenging work that stretches your abilities, attend trainings, and use new technologies to make a lasting impact.
• Stay healthy: Subsidized canteen, well-being programs, check-ups, and sport allowances.
• Save money: Discounts, exclusive banking terms, and a heavily subsidized public transport pass.
• Family support: Child allowances, gender-neutral parental leave, bilingual company kindergarten, and holiday childcare.
• Competitive salary: Starting at EUR 90.000 gross p.a. including overtime, with market-compliant overpayment based on experience and qualifications. We are happy to discuss your actual salary in person.