Tech Lead Java

• Design, optimisation and maintenance of databases (MySQL, PostgreSQL, MongoDB and Cassandra)
• Usage of messaging technologies such as Apache Kafka and interaction with caching and search solutions (Redis and OpenSearch)
• Contribution to data-related use cases involving BigQuery and Python (desirable)
• Participation in cloud-based environments (Google Cloud - desirable) and containerised infrastructures (Kubernetes - desirable)
• Ensuring high code quality through testing, automation and modern engineering practices
• Acting as a technical reference within an agile team, supporting decision-making and mentoring
• Long-term involvement in projects, supported by a structured onboarding process lasting up to one year

Do you have experience in System architecture?, At WATA Factory, we're looking for a Tech Lead Java who combines strong technical expertise with the ability to lead architectural decisions and support a senior engineering team in long-term projects. If you enjoy taking technical ownership, working in stable environments, and growing together with an experienced team, we'd love to meet you.

YOUR TASKS

• Technical leadership in the design, development and evolution of backend systems based on Java
• Definition and continuous improvement of system architecture, with a strong focus on scalability, performance and maintainability
• Hands-on development of backend services using Java (experience with Dropwizard is desirable but not mandatory), * Degree in Computer Science or a related technical field, or equivalent professional experience
• Proven experience as a Java backend developer, ideally in a senior or tech lead role (mandatory)
• Solid experience working with relational and NoSQL databases (MySQL, PostgreSQL, MongoDB and Cassandra).
• Experience with Apache Kafka in messaging-based architectures (desirable)
• Experience with Dropwizard is desirable but not required
• Knowledge of Redis and OpenSearch is desirable
• Experience or interest in data warehousing solutions such as BigQuery and scripting with Python is desirable
• Familiarity with cloud platforms (Google Cloud - desirable) and container orchestration (Kubernetes - desirable)
• Strong understanding of Clean Code principles, scalable architectures and engineering best practices
• Comfortable working in agile environments and collaborating with senior, multidisciplinary teams
• High level of autonomy, structured thinking and clear communication skills
• Fluent English, spoken and written (minimum level B2 - mandatory)
• German is a plus (desirable)

• Permanent contract from day one
• Long-term, stable projects with clear technical ownership
• A structured onboarding process of up to one year,fa fa-star ensuring deep understanding of the product, domain and architecture
• Integration into a team of 5 people, composed of senior developers and tech leads
• 30 working days of holiday, plus official German public holidays
• Access to our internal technical library
• Private health insurance
• Weekly technical training sessions
• Flexible working: from home, the office, or hybrid
• Support from experts specialised in various areas
• No dress code - wear what makes you comfortable
• Friendly, collaborative working environment
• Modern office with high-end hardware and leisure areas
• Flexible working hours