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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Java / Kotlin Backend Developer - Scalable SaaS Platform - **Company:** deltaconX - **Location:** Wien, Austria - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Java (Programming Language), Software as a Service, Continuous Integration, Relational Databases, DevOps, Distributed Systems, Elasticsearch, PostgreSQL, MySQL, Performance Tuning, Prometheus, Private Cloud Environment, Grafana, Technical Debt, Backend, Git, Kotlin, Solid Principles, Kubernetes, Front End Software Development, Docker, Microservices - **Published:** July 14, 2026 - **Apply:** https://www.adzuna.at/details/5741690418 ## About the Role * Professional experience developing backend systems using Java. * Experience working with Kotlin or strong interest in adopting Kotlin in production systems. * Experience building scalable backend services in a SaaS or distributed systems environment. * Experience working with Spring, Micronaut or comparable backend frameworks. * Experience working with relational databases such as PostgreSQL or MySQL. * Strong understanding of software design principles, clean code and maintainable architectures. * Experience working in agile development environments. * A structured and solution-oriented mindset combined with strong analytical thinking. * Interest in performance optimization, scalability, and backend system design. * Comfortable working in modern development environments with strong focus on automation and tooling. * Experience using AI-assisted development tools such as Claude Code is a plus, or openness to integrating such tools into your daily workflow. * Strong communication skills and the ability to collaborate effectively within a cross-functional team. ## Description To strengthen our engineering team in Vienna, we are looking for a Java / Kotlin Backend Developer (m/f/d) who enjoys working on scalable backend systems, contributing to platform stability and performance, and collaborating across teams to continuously improve our product. Tech Stack Backend: Java, Spring (our Monolith) / Kotlin, Micronaut (all new feature development) Architecture: A pragmatic hybrid architecture with a Java/Spring monolith and Kotlin/Micronaut microservices. The migration is already well advanced, with selected components intentionally remaining in the monolith. Databases: PostgreSQL, MySQL Infrastructure: Docker, Kubernetes, Private Cloud CI/CD: Git-based pipelines Monitoring: Prometheus, Grafana, Elastic Stack Your Environment You will be working in a cross-functional product team consisting of Backend and Frontend Engineers, QA, DevOps, Product Management, and Architecture. Current team setup: 4 Backend Developers, 2 Frontend Developers, 1 Software Architect, 1 DevOps Engineer, 1 QA Engineer, 2 Product Managers, 1 Engineering Manager, and CTO. We are actively growing the team, with plans to expand to 6 Backend Developers and 2 QA Engineers. The role focuses primarily on new feature development (currently approx. 90%), while also addressing technical debt pragmatically as part of ongoing product development. ## Related Videos - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [MySQL Protocol Features You Should Be Aware Of](https://www.wearedevelopers.com/videos/100267-mysql-protocol-features-you-should-be-aware-of) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) - [Branch your database like your code: How schema changes and pull requests go hand in hand](https://www.wearedevelopers.com/videos/350-branch-your-database-like-your-code-how-schema-changes-and-pull-requests-go-hand-in-hand) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) ## Related Articles - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Software Developer Salary in Austria [2023]](https://www.wearedevelopers.com/magazine/213-software-developer-salary-in-austria-2023) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Tech Conferences Germany: The Best Tech Events For 2023](https://www.wearedevelopers.com/magazine/181-tech-conferences-germany-the-best-tech-events-for-2023) - [Backend Developer Salary in Austria [2023]](https://www.wearedevelopers.com/magazine/226-backend-developer-salary-in-austria-2023)