10/25/2026 updated
100 % available
Senior Software Engineer | Senior Backend Java Developer
Prague, Czech Republic
Only remote
MSc in AI, Robotics and Computer Vision, Czech Technical University in Prague, 2002-2008About me
Senior Software Engineer and Senior Backend Java Developer based in Prague, working fully remotely. 10+ years of experience in Java, Python, Spring Boot, PostgreSQL, GCP, Kafka and microservices, with AI and transformer-model experience. Previously at ZahlungsWERK GmbH and Avast.
GCPC (Programming Language)Java (Programming Language)Artificial IntelligenceAmazon Web ServicesGoogle BigQueryDistributed SystemsEclipse (Software)ElasticsearchIntelliJ IDEAPython (Programming Language)PostgreSQLMachine LearningMySQLRedis
Senior Software Engineer and Senior Backend Java Developer with 10+ years of experience. Core skills: Java, Python, Spring Boot, PostgreSQL, Google Cloud Platform (GCP), Kafka and microservices. Experience with AI and transformer models, including work with Claude Code. Recent roles: ZahlungsWERK GmbH, Prague (Apr 2024-Aug 2026) and Avast, Prague (Aug 2019-Mar 2024), with earlier experience at Deutsche Börse and as co-founder of BitStock. MSc in AI, Robotics and Computer Vision, Czech Technical University in Prague (2002-2008). Languages: English (C2), German (B2), Italian (A2). Based in Prague, Czech Republic; available for full remote work. Full skills: Java, Python, C, Spring Boot, JEE, Hibernate, Apache Wicket, PyTorch, Mockito, Testcontainers, Claude Code, Serena MCP, Maven, Sonar, Git, Logstash, Kibana, Docker, IntelliJ IDEA, Eclipse, PostgreSQL, MySQL, Oracle DB, Redis, Cassandra, Elasticsearch, BigQuery, PubSub, Apache Kafka, RabbitMQ, GCP, AWS, Kubernetes, Terraform, microservices, REST API, Distributed Systems. Certification: Oracle Certified Programmer for the Java Platform.
Experience
Professional experience10+ years
Freelancer since2026
Languages
GermanGoodEnglishFluentItalianBasic knowledge
Project history
Stack: Claude Code, Java 21, Spring Boot, PostgreSQL, Redis, GCP, Terraform. Payment processing platform supporting SEPA Direct Debit (SDD) and card payments for EDEKA. Designed and built the Monitoring & Operations System (MOS) to manage merchant onboarding, customer registration, transactions, and settlements. Engineered a data integration pipeline to publish payment and registration data to Google BigQuery. Implemented automated risk and compliance reporting modules.
Stack: Java 11, Spring, ELK stack (Elasticsearch, Logstash, Kibana), RabbitMQ, Kafka, Cassandra, PostgreSQL. Avast For Business — a highly distributed, high-availability device protection and network monitoring system spanning multiple failover availability zones. Developed core microservices and scalable backend components. Bootstrapped new sub-systems, including an enterprise reporting engine.
Stack: Java, Spring, RMI, PostgreSQL, CISCO CUCM/UCCE. Distributed Customer Experience platform for contact centers, transitioning from RMI to a microservices architecture. Core system maintenance, bug fixes, feature enhancements, 3rd-level support for mission-critical deployments.