Senior Backend Developer – Platform Scaling Specialist

About

With our unified SaaS platform deltaconX, we simplify regulatory compliance to streamline transaction reporting processes. Since the market launch in 2013, we have been committed to helping businesses meet evolving regulatory demands efficiently.

Our platform is the one stop shop for our clients to be compliant with key regulations like EMIR, MiFIR, SFTR, REMIT, MAS, HKMA and many more. As we continue to grow through our Go-Global initiative and strategic partnerships, we are looking for talented individuals to join us in shaping the future of regulatory compliance and delivering innovative solutions to our clients.

Help us build and scale a backend platform that processes complex regulatory data for international clients in a high-reliability SaaS environment.

Your role in the team

• Play a key role in transforming a production-proven solution into a highly scalable, distributed platform that serves enterprise clients across the globe.
• Actively shape architectural decisions, optimize performance, and contribute to the gradual migration away from a monolithic foundation.
• Design and implement scalable, service-oriented solutions in Kotlin (2+) and Java (21), aligned with our growing performance and availability requirements.
• Contribute to the platform’s evolution by refactoring legacy components and improving the robustness of the system under increasing loads.
• Collaborate across teams to modernise architecture and build new features that are resilient, observable, and horizontally scalable.
• Work with our technology stack: Kotlin (2+), Java (21), Spring Framework, Micronaut, Apache Kafka, Apache Camel, Apache Artemis JMS, Hibernate, Kubernetes, Helm, REST, SOAP, MySQL, PostgreSQL, Elasticsearch, and the Elastic ELK Stack.
• Use modern developer tools like JetBrains IntelliJ + AI, Datagrip, Lens, Rancher, and Postman to streamline development.
• Build and maintain CI/CD pipelines using GitLab to ensure rapid, safe, and repeatable deployments.
• Take part in architectural discussions and influence key technology decisions as we continue scaling globally.

Qualifications

• 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 a 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.
• Hands-on experience with distributed systems, message-driven architecture (Kafka), and resilient service design.

Benefits

• A meaningful role working on a modern SaaS platform in a highly regulated domain.
• Direct impact on product development and technical decisions in a small, experienced team.
• An international working environment with close collaboration across teams and locations.
• Flexible working hours with a hybrid working model (60% onsite, 40% home office).
• A modern office in the myHive Twin Towers at Wienerberg with excellent infrastructure.
• Opportunities for continuous professional and personal development.
• Flat hierarchies and short decision-making paths.
• MacBook as your development machine.
• Subsidized gym membership.
• Annual Wiener Linien public transport pass or equivalent contribution toward a parking space (parking subject to additional monthly cost).
• Secure bike parking with shower facilities.
• Private pension plan after 2 years with the company.

Topics

• Cloud Computing
• Microservices
• Architecture

Job Locations

• Wienerbergstraße 11, Tower B/6th Floor/Top 01 1100 Wien Austria

Salary

• from 62.664€ gross per year

Employer

• deltaconX
• Vienna, City of London, Meggen