Design and own end-to-end ETL pipelines
ingesting, transforming, and delivering data from diverse external sources
Work with large-scale datasets and build systems that handle them reliably and efficiently
Apply AI/ML techniques to analyze, classify, and summarize complex data from multiple sources
Maintain and evolve internal tooling built on Django
Architect, implement, and secure REST APIs that hold up in production
Consolidate and improve alerting and monitoring infrastructure across the stack
Lead a small team of developers
conduct code reviews, define standards, mentor junior and mid-level engineers, and own technical decisions
Translate business requirements into technical plans and communicate tradeoffs clearly to both technical and non-technical stakeholders
Drive engineering best practices: testing culture, documentation, CI/CD discipline, incident response

5+ years of hands-on Python experience
you know the language well enough to have opinions about it
Proven track record leading or mentoring a development team, or strong appetite and readiness to step into that role
Experience with AI/ML frameworks
Apache Spark (PySpark), PyTorch, TensorFlow, Keras, Scikit-learn, or comparable
Solid SQL skills and comfort working with relational databases at scale
Fluency with Git and collaborative development workflows
Actively uses AI coding tools (Copilot, Cursor, Claude Code, or similar) as a force multiplier
you know when to trust them, when to push back, and how to get the best out of them
Strong problem-solver who can break down ambiguous problems and drive them to resolution
Self-directed and organized
you can take an undefined problem, structure it, and deliver without needing handholding
Clear communicator in English, written and spoken
Team player who brings initiative and a drive to continuously improve both the codebase and the people around you

Work/life balance : flexible working hours, remote work
Flexibility : work from our Berlin/ Varna office, from home, or anywhere in the world
Development : regular feedback, coaching, educational resources, career development opportunities
Remuneration : attractive salary, remote working subsidy, regular appraisal
Culture : growing team, highly motivated professionals from different cultural backgrounds, regular team events
Internationality: an international team consisting of various professionals and highly motivated personalities

Senior Python Developer – Team Leader

Key skills