Senior AI/ML Engineer

Who we areWe are a small, independent startup with our own team, decision-making, and culture, while operating within the Cyfrowy Polsat and Polkomtel Group and benefiting from its support. We build production AI/ML and data-intensive systems, including recommender systems, distributed applications, and ML-powered products. We value simple, maintainable solutions and encourage our team members to influence architectural and technological choices. For more information please see: altalog.plWe're looking for a Senior Software Engineer with strong Python skills and working knowledge of AI/ML tools such as Torch and scikit-learn. Most of the work would involve data processing, integration of AI/ML models and algorithms, experiments, and some backend work. When you apply we always respond. If you don't see the response, please check your spam folder. Our AI/ML focus: Recommendation systems with collaborative filtering, content-based filtering, and our own algorithmsLLM-based content enrichmentVector search and retrievalOur tech stack includes: FastAPIPyTorchscikit-learnPydanticDocker and KubernetesKafkaRedisMongoDB and PostgreSQLRequired: Valid work permit for Poland and Polish tax residencyGood working proficiency in both Polish and EnglishLooking for a long-term collaborationAbility to work independently with minimal supervision and a high level of self-motivationComfortable working in a remote-first collaborative environmentWillingness to contribute to and maintain a respectful and collaborative communicationRequired technical skills: Appreciation for clean, maintainable, and well-structured codeStrong Python programming skillsSolid understanding of software design, algorithms, and data structuresExperience developing software using modern AI/ML frameworks and tools (such as PyTorch, scikit-learn, TensorFlow, or similar)Experience building and maintaining CI/CD pipelines (GitLab CI)Experience developing and deploying containerized applications with DockerExperience with NoSQL databases, preferably MongoDB and/or RedisExperience with SQL databases, preferably PostgreSQLExperience with vector databasesExperience writing automated tests and maintaining reliable test coverageNice to have: Degree in Computer Science or a related field;Experience with cloud platforms;Familiarity with message brokers or streaming platforms (e.g., Kafka or RabbitMQ);Experience with search and indexing technologies such as Elasticsearch. What we offer: B2B contractFlexible working hoursRemote, hybrid, or office-based workReal impact on the product and technical decisionsOptional Multisport and Medicover benefit packagesFriendly and collaborative work environmentInteresting technical challenges and opportunities for professional growthWorking in a team of ~10 software, AI, and DevOps engineersPR reviews and technical discussions