Senior Backend Developer @ deltaconX

Senior Backend Developer – Platform Scaling Specialist @ deltaconX

💾 Job Technologies

• Kotlin • Java • Spring • Micronaut • Apache Kafka • Apache Camel • Hibernate • Kubernetes • Helm • RESTful API • SOAP • MySQL • PostgreSQL • Elasticsearch • Datagrip • Rancher • Postman • GitLab

👥 Your role in the team

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. 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.

• You will play a key role in transforming a production-proven solution into a highly scalable, distributed platform that serves enterprise clients across the globe. • This includes actively shaping architectural decisions, optimizing performance, and contributing 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.

🌟 Our expectations of you

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.

Qualifications • You have hands-on experience with distributed systems, message-driven architecture (Kafka), and resilient service design.

🎁 What we offer

• 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 that you deal with on the job

• Cloud Computing • Microservices • Architecture

📍 Job Locations

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

💰 Salary

from 62.664€ gross per year

🏢 This is your employer

deltaconX 📍 Vienna, City of London, Meggen