Senior Software Developer responsible for backend development in C#/ .NET at matelso GmbH. Working in an agile team, developing microservices in a hybrid work model.
About the role
- R&D Engineer building AI-driven B2B analytics SaaS from scratch for Tesonet Group. You will shape product architecture, data flows, and engineering principles.
Responsibilities
- Build and improve systems that collect, normalize, and store data from external services and APIs.
- Design robust integrations with third-party APIs and LLMs, handling errors, rate limits, retries, and evolving interfaces.
- Explore responsible automated browser interactions or scraping.
- Automate scheduled collection workflows and make sure they run reliably every day with good observability and alerting.
- Collaborate with engineering peers on design, architecture, reviews, and shared tooling.
Requirements
- Strong Python backend experience, especially for integrations and automation.
- Hands-on experience with RESTful APIs, LLMs or AI frameworks (e.g. LiteLLM, Langchain, OpenAI/Anthropic/Gemini APIs) and external system integration.
- Comfortable experimenting, troubleshooting, and tackling unfamiliar problems with curiosity and initiative.
- Experience with workflow scheduling/orchestration frameworks (e.g., Dagster) and reliable automation.
- Familiarity with Docker, Kubernetes, Git and modern CI/CD practices.
- Nice to have: experience with web scraping/browser automation tools (e.g., Selenium, Playwright) and observability tools (e.g., Prometheus, Grafana).
Benefits
- Professional growth. Internal and external events, online training, conferences, books - everything you need to reach full potential.
- Health benefits. Private health insurance, online and on-site workouts, consultations to feel and be your best.
- Team spirit. Team buildings and parties with games, shows, tastings, food coupons, gifts, and it’s on us.
- More free time. Stay with us and additional vacation days will be added to your calendar.
- Additional paid leave. Additional days are covered by us in cases of illness or special occasions.
- Flexibility. Flexible working time arrangement.
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