Senior Software Engineer (Python Backend & AI Infrastructure)

To achieve this, we enhance open data with AI to make real estate financing faster, simpler, and more sustainable. Why this role matters

You’ll be a senior engineer on the team responsible for the Python backend that powers our AI-driven processing platform in production. Beyond orchestrating LLMs, computer vision, and other ML systems, these services run core domain logic, integrate data from a range of sources, and expose the APIs that serve real customer workloads at scale.

These systems are how our customers actually experience credium-when they’re fast, reliable, and accurate, the whole product works. You’ll have a direct hand in making that true. What you’ll do

• Own core systems and their architecture, the production environment, and the platform’s reliability, scalability, and performance-consistently delivering high-quality features
• Drive optimization of resource usage and cost, using monitoring and load-testing data to guide engineering decisions across the team
• Work closely with machine learning engineers and backend developers to bridge the gap between AI models and production-ready software
• Drive discussions with multiple stakeholders and lead cross-team technical alignment and delivery

• Several years building and operating Python backend services in production, with deep Python fundamentals and strong experience building APIs (FastAPI or similar)
• A proven track record designing, owning, and scaling resilient distributed systems - including event-driven pipelines with messaging/task-queue systems (Kafka, RabbitMQ, Celery, etc.), performance optimization, and load testing at scale
• Hands-on experience with cloud platforms (Azure, GCP, or AWS) and containerization (Docker, Kubernetes)
• Experience integrating or operating LLMs or other ML models in production
• Strong experience with observability (logging, metrics, dashboards) and debugging complex production issues
• Ability to take end-to-end ownership of Python development, drive stakeholder discussions, and align delivery across teams
• Strong problem-solving skills, genuine curiosity about how systems behave in production, and good written and spoken English
• Experience working in an ISO 27001 / GDPR-compliant environment is a plus

We’re not building a lifestyle business. We’re building a company that matters.

We’re an AI-first team, using machine learning and intelligent systems across our workflows - from building data extraction to product recommendations.

We believe in high trust, high standards, and high impact. We support flexibility, but we don’t optimize for 9-to-5. Instead, we look for individuals who take ownership, thrive on challenge, and want to grow with us. What we offer

• Competitive salary + Virtual Stock Options (VSOPs)
• Autonomy & responsibility from day one
• Remote-friendly & flexible work environment
• Your own gear + access to modern tools
• Extras like Wellpass
• Real-world impact - accelerate how Europe finances and transforms its residential building stock

Hiring process

1. Brief async intro / short call
2. Team interview (skills & mindset)
3. Case or challenge
4. Founder chat & offer

We move fast - and give clear feedback.

Ready to help transform buildings into better places to live, own, and finance? Let’s talk.About us

At credium, we’re on a mission to make owning the new renting - by building the digital infrastructure that powers simple and sustainable homeownership.

We enable mortgage banks, property owners, and real estate professionals to understand buildings better and faster - from floor plans to energy efficiency, from renovation potential to solar readiness.

We’re a VC-funded startup with major banks as customers and a purpose that matters.

At credium, we are building Europe’s leading platform for building data-AI-first, with a clear goal: Homeownership should be exciting, not overwhelming.