Senior Software Architect

On behalf of our client—an IoT/ SaaS scaleup company —we are recruiting a Senior Software Architect (m/f/d). In this position, you will take on architectural and design responsibility for the platform layer bridging a mature core system and new applications. You will draft and implement backend services, APIs, and scalable infrastructure for a product in daily real-world use, while helping actively shape team structures and technical processes from the ground up. We are looking for an experienced professional with a strong track record as a Senior Backend or Fullstack Engineer in long-term product development, proven architecture experience with object-oriented languages (Java, C#, .NET, or Python), and the willingness to take on technical ownership for sustainable solutions. | WHAT YOU WILL DO * Design and develop resilient backend systems and API endpoints for our central platform. * Define and substantiate technical architecture and design choices for upcoming system modules. * Regularly improve, scale up, and tune current services alongside the core platform infrastructure. * Integrate fresh functionalities into our proven legacy system utilizing neat and structured interfaces. * Assume full technical responsibility for operational performance, reliability, and deployment processes in production. * Serve as a key technical advisor in our growing Platform Team, guiding technical frameworks and methodologies from the very beginning. | WHOM WE ARE LOOKING FOR * Multi-year track record working as a Senior Backend or Full-Stack developer in a dedicated product-focused environment rather than project-based agencies. * Deep expertise in using object-oriented languages like Java, C#/.NET, or Python. * Demonstrated background in system architecture with a history of owning and maintaining the systems you build. * Solid practical knowledge of designing APIs, microservices, and managing communications between distributed architectures. * Good understanding of containerization technologies, continuous integration/continuous deployment, and current DevOps workflows. * Passion for joining an early-stage team structure and helping to define joint workflows and team dynamics. * Excellent written and verbal communication skills in English. | REMOTE WORK POLICY In this role, you can work hybrid remote (2-3 days remote) from one of the offices in Graz or in Klagenfurt. Should you relocate or travel for this role, your relocation or travel costs will naturally be covered. | WHAT YOU WILL GET * Salary up to 90k€, negotiable. * Bike leasing for a state-of-the-art company bike. * Free Company Lunch. * Hybrid Remote Setup with ample room for individual flexibility. * Diverse professional development opportunities. | NEXT STEPS If you apply here, we will send you additional information about the company, the role, and the salary to support your decision-making process. If you are still interested, we will invite you to an initial interview.