Job Description

The Role

We are looking for a Java Technical Lead / Senior Backend Developer to join our backend engineering group and contribute to the design, development, and improvement of large-scale, high-performance backend systems. You will work within a cross-functional Agile team and help drive the implementation of technical solutions aligned with architectural guidelines and business objectives.

In this role, you will collaborate with product owners, architects, DevOps engineers, and other developers to build reliable, scalable services and integrations. Depending on project needs, you may be assigned to one of our strategic backend initiatives, contributing either to new product development or the enhancement of existing platforms.

This position is ideal for someone who enjoys taking ownership, guiding teams technically, and delivering high-quality solutions in a collaborative environment.

What you will do

• Lead the design and implementation of backend services, RESTful APIs, GraphQL endpoints, and server-side logic.
  
• Ensure backend solutions align with architectural direction, performance expectations, and long-term business goals.
  
• Guide the development of clean, scalable, and maintainable code following industry standards and best practices.
  
• Design, optimize, and maintain relational and NoSQL database schemas.
  
• Develop efficient data access layers, complex queries, and stored procedures.
  
• Work with data systems such as MSSQL, Redis, and cloud-based storage options.
  
• Integrate with third-party APIs, external services, and enterprise systems.
  
• Work with messaging platforms such as JMS, Artemis, AMQ, Azure Service Bus, or Kafka (depending on project).
  
• Support event-driven and real-time processing architectures where required.
  
• Implement unit, integration, and API tests to ensure reliability.
  
• Drive a culture of quality through code reviews, mentoring, and enforcing best practices.
  
• Contribute to continuous improvement of coding standards, processes, and tooling.
  
• Collaborate with DevOps engineers on CI/CD pipelines, deployments, and system observability.
  
• Ensure smooth delivery to test and production environments.
  
• Contribute to performance tuning, scalability improvements, and system stability.
  
• Collaborate with frontend engineers, QA, DevOps, PMs, BAs, and architects.
  
• Participate in Agile ceremonies (stand-ups, sprint planning, grooming, retrospectives).
  
• Proactively contribute to task analysis, refinement, and breaking down complex work.
  
  

Requirements

• Strong experience with Java (17+)
  
• Spring Framework, Spring Boot, ReactiveJ, WebFlux
  
• Maven, including multi-module setups
  
• REST and GraphQL API development
  
• Understanding of OpenAPI principles
  
• Database experience with MSSQL, Redis, and other relational/NoSQL storage technologies
  
• Experience working with cloud platforms ( Azure, AWS, or similar), including cloud-based storage and serverless or managed compute services
  
• Familiarity with containerization and orchestration (Docker, Kubernetes)
  
• Experience with CI/CD pipelines ( Azure Pipelines, GitHub Actions, or similar)
  
• Experience with messaging systems: JMS, Artemis, AMQ, Azure Service Bus; Kafka is a plus
  
• Testing experience with JUnit, Mockito
  
• Exposure to test automation practices is a plus
  
• Knowledge of OAuth 2.0, OpenID Connect
  
• Experience with WebSockets
  
  

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
• Salary range: 4400 - 7100 EUR gross/month (Note: the specific amount will depend on your experience and competencies.)

Additional benefits based on location:

Lithuania:

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

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

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 part of a diverse, inclusive team committed to growth, innovation, and continuous learning.
• Professional Growth Zenitech supports continuous learning and development through the People Lead system, helping you advance your skills and career.

Diversity and Inclusion

Zenitech celebrates diversity in all its forms. We aim to create an inclusive environment where everyone feels valued for their unique contributions and perspectives. If you require any adjustments during the application process, please let us know—we’re here to help. Our commitment to diversity, equity, inclusion, and belonging can be found here