Senior Java, Full Stack Software Engineer, Architect

6/2019 – 5/2023

• High availability java backend development based on the microservices stack ‑ Apache Kafka messaging, Kubernetes container orchestration,
Hazelcast IMDG, PostgreSQL, MongoDB
• Business logic design and implementation ‑ order processing, wallet management, loyalty program, purchasing, payment
• Database schema design, Liquibase migrations
• REST API design and implementation ‑ API first approach, OpenAPI/Swagger
• Unit and integration tests implementation, end‑to‑end testing, optimization, Gatling load testing
• Project requirements analysis, technical documentation preparation

Technologies: Java 17+, Spring Boot, Spring Data JPA/MongoDB, Hibernate, Liquibase, Apache Kafka/Streams, OpenAPI/Swagger, Hazelcast, Kubernetes, Minikube, Helm, Spring Security, API Gateway, UAA, Feign clients, JUnit, Mockito, GitLab, Confluence, IntelliJ, Ubuntu Linux

Confluence (Atlassian), Docker, Git, Hibernate (Java), Java (allg.), Kafka, Kubernetes, MongoDB, PostgreSQL, Spring

9/2018 – offen

Options Trader - Options trading decision support, risk management and execution system
Trade Analytics - Trade analytics for options, futures, futures options, stocks and other instruments

Technologies: Java 21+, Spring WebFlux 3+, Project Reactor, RSocket, WebSockets, Hazelcast, Hibernate/JPA, PostgreSQL, Flyway, Interactive Brokers API 10.19, Angular v18+, Angular Material, GitHub Actions, AWS EC2, AWS VPC, AWS ECR, Ubuntu, Docker

Amazon Web Services (AWS), Docker, Git, Hibernate (Java), Java (allg.), PostgreSQL, Spring, Ubuntu

11/2016 – 11/2018

• Low latency, multi‑threaded, high availability trading platform development
• Design and implementation of the trading platform components such as broker/exchange connectors, order management, event han‑
dling/messaging, live and historical market data, instrument reference data management
• Trading strategies backtesting, optimization, paper trading testing, deployment, live monitoring and handing over to the clients
• Unit and end‑to‑end integration testing
• Project requirements analysis and effort estimates preparation
• Technical documentation and user guides preparation
• Working in close collaboration with clients, other team members and project management

Technologies: Java 8+, JEE, Spring framework, JUnit, Mockito, Hibernate, JavaScript, HTML5, Bootstrap, MySQL, InfluxDB, Esper CEP, ActiveMQ, STOMP, WebSockets, Amazon AWS, Git, Jira, Jenkins, IntelliJ, Eclipse, Docker

Amazon Web Services (AWS), Docker, Eclipse, Hibernate (Java), Java (allg.), JavaScript, Jenkins, Jira, mySQL, Spring