Senior Java Software Engineer

The Role

We are looking for a Senior Java Software Engineer to help design, develop, and maintain reliable server-side logic, APIs, and backend services.

You’ll collaborate closely with frontend developers, DevOps engineers, and product teams to deliver high-quality, scalable, and secure applications that power our core systems.

What you will do

• Design and implement server-side logic, RESTful APIs, GraphQL endpoints, and backend services.
  
• Develop scalable, maintainable, and efficient code following industry best practices.
  
• Design and optimize database schemas.
  
• Write complex queries and procedures for efficient data handling.
  
• Integrate external services, APIs, and third-party systems.
  
• Participate in system architecture and design discussions.
  
• Implement unit, integration, and API tests to ensure application reliability.
  
• Participate in code reviews to maintain high development standards.
  
• Work closely with frontend teams, DevOps engineers, product owners, and business analysts.
  
• Contribute to agile ceremonies, such as sprint planning, stand-ups, and retrospectives.
  

Requirements

• Programming Languages: Java (17+), Maven
  
• Frameworks: Spring Framework, Spring Boot, ReactiveJ, WebFlux
  
• API Development: RESTful APIs, GraphQL
  
• Databases: Redis, MSSQL, Azure Table Storage, r2dbc
  
• Cloud: Azure Function Apps, Azure Table Storage
  
• Containerization: Docker, Kubernetes
  
• Messaging Systems: JMS (Artemis, AMQ, Azure Service Bus)
  
• CI/CD: Azure Pipelines
  
• Testing: JUnit, Mockito
  
• Authentication & Communication: OAuth 2.0, OpenID Connect (via Spring), WebSockets
  
• Operating Systems & Tools: Unix/Linux systems, Git
  
• Grafana, OpenAPI principles, Basic statistics knowledge
• Strong problem-solving and analytical skills
• Effective communication with technical and non-technical stakeholders
• Collaboration and teamwork across multidisciplinary teams
• Attention to detail and code quality
• Ownership of deliverables and ability to drive tasks to completion
• Adaptability to different technologies, frameworks, and business domains
  

What we offer

• Hybrid/flexible working model and flexible working hours
• Private Medical and/or Health Insurance (location dependent)
• Length of Service Awards
• Referral programme
• The option of a cafeteria package, meal tickets, or team lunches (location dependent)
• A culture of continuous growth, supported by our People Lead system and various training resources for your personal development
• Agile mindset, simplified processes, and a great atmosphere where commitment and autonomy are celebrated
• A community-first mindset, working with talented people across technology products and consulting
• Charity events and programs

(*) As we hire permanent employees for this role, we offer remote opportunities only in Romania, Lithuania, and Hungary.

Additional benefits based on location:

Hungary:

Extensive benefit package: SZÉP card (a multipurpose cash replacement item for accommodation, meal, leisure & entertainment purposes)

Lithuania:

Discount benefits platform, the opportunity to work from abroad (max. 60 days per annum)

Romania:

Bookster library subscription, and the opportunity to work from abroad (max. 60 days per annum)

About us

Zenitech is a leading technology solutions provider dedicated to reshaping the global digital landscape. Headquartered in the UK, Zenitech operates internationally, with offices in Lithuania, Romania, and Hungary.

We use a bespoke approach depending upon where the client is on their digital journey, comprising a combination of access to dedicated R&D labs, technology implementation advice, and specialist nearshore development talent. As an international community of individuals who are open to learn from each other, we collectively define and input into the digital future of the clients’ businesses.

Why Zenitech?

• Impactful Projects: Drive meaningful change through digital transformation projects and have an opportunity to make an impact on many different industries.
• Collaborative Culture: Be