Senior Back End Engineer

Are you passionate about designing and building scalable backend systems for cloud-hosted applications? Do you enjoy working with modern architectures like microservices to solve real-world challenges? Are you excited to contribute to impactful solutions that integrate with AI and operate in client-facing environments?

Join Elixirr Digital as a Senior Back End Engineer and help shape the future of our cloud-native platforms!

As a Senior Backend Engineer, you’ll work with a modern tech stack—including cloud services like AWS and  Azure —to build secure, scalable systems that power our SaaS products and client-deployed solutions. You’ll collaborate closely with our DevOps and AI teams , integrating their expertise into the backend services you develop.

Candidates applying for employment contract kindly note this position is a hybrid working opportunity from our locations in Rijeka or Zagreb .

What you will be doing as Senior Back End Engineer  at Elixirr Digital?

Platform Architecture & Development:

• Design, implement, and maintain the core backend architecture for Elixirr’s AI-augmented consulting platform.
• Drive decisions on microservices, containerization, and serverless solutions (e.g., AWS Lambda, Azure Functions) based on performance and scalability requirements.

Open Source & Cloud Integration:

• Evaluate and integrate open-source frameworks to reduce development time and improve platform reliability (e.g., Spring Boot, Django, Node.js frameworks, etc.).
• Leverage AWS and Azure services (e.g., EC2, S3, RDS, Cosmos DB, Event Hub, etc.) to deliver high-availability, high-performance solutions.

AI-Augmented Development:

• Explore and utilize cutting-edge AI tools (e.g., code generation, automated testing, GPT-based assistants) to accelerate the development lifecycle, improve code quality, and optimize performance.
• Collaborate with AI engineers and data scientists to ensure smooth integration of AI/ML models, microservices, and APIs.

Technologies we use:

Competencies and skillset we expect you to have to successfully perform your job: 

• 5+ years of hands-on experience building and deploying large-scale backend systems in cloud environments (AWS and/or Azure).
• Strong proficiency in Python or at least one major backend language/framework (e.g., Django, Java/Spring Boot, Node.js).
• Experience with microservices architecture, RESTful API design, and event-driven or serverless architectures.
• Familiarity with containerization (Docker, Kubernetes) and Infrastructure as Code (Terraform, AWS CloudFormation, Azure Resource Manager).
• Solid understanding of relational and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB, DynamoDB)

AI & Automation Skills:

• Experience or strong interest in using AI/ML-enabled developer tools (e.g., code generation, automated testing, GPT-based assistants) to accelerate the software development lifecycle.
• Ability to collaborate with data science teams to integrate machine learning models and AI APIs.

We could be a perfect fit if you are:

Wonder why Elixirr Digital is the best place to work? 

“ Not everyone fits the mold. ” Therefore, we provide a flexible, custom benefit system to our employees. We want you to be happy and satisfied. You can choose a perfect combination from a wide range of various benefits. Maybe you care about your health, and you want to monitor it year-to-year so you can choose a full medical checkup. If you are a sports enthusiast, then a Multi-sport card is right benefit for you. To cover your passion for the technology, we offer an additional individual budget for the extra equipment. We are trying to assure you are fairly rewarded for your achievements and efforts

Take your chance and apply!