R&D Engineer | Mid-Senior | Python We are building a world-class, AI-driven B2B analytics SaaS. Built from scratch as a core product, it defines a new generation of marketing analytics within Tesonet Group.You’ll join while core architecture, data flows, and engineering principles are actively being designed, with the opportunity to take real ownership and shape how the product is built and how teams collaborate.The platform is built around intelligent automation, real-time data processing, ML modeling, and large-scale distributed systems, with AI deeply embedded at its core. By working with complex data, we deliver a powerful self-service analytics experience that enables faster, smarter marketing decisions.\nMain 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. Core 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). Salary Monthly gross salary is 4400 - 7000 eur/month. We are open to discussing a different salary based on your skills, experience, and potential impact. \nWhat We Offer• 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.View our guidelines for AI usage during hiring process: AI guidelines