Senior Java Developer

Ciklum
is looking for a
Senior Java Developer
to join our team full-time in Poland.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

As a Senior Java Developer, become a part of a cross-functional development team engineering experiences of tomorrow working for the customer. The role is required to be familiar with lean mean machine framework for the innovation/incubator space.This senior engineer should be skilled in backend API integration,

working on our services that interface with OpenAI and other LLMs, and prompt engineering. They should have strong experience with backend Kotlin and libraries like Ktor and Koin.

With almost 100 million active users across 25 countries, they're a global food tech company. As a recently formed team, they have many opportunities and ideas for sharing value back to the customers within their continuously expanding platform. They're looking for talented and trusted engineers to help them impress their customers.

Responsibilities:

• Write highly testable, automatable and performant code over the whole SDLC using high coding standards and software best practices
• Develop a prototype, prove the value of the features and show a demo.
• Develop and review feature design documents and provide inputs/update to specifications for the solution
• Participate in the team activities according to the methodology - daily meetings, planning, retrospectives etc)
• Сoach/supervise middle/junior engineers by demand of the project.
• Be comfortable with research with new experiments and ideas.

Requirements:

• Software Design
• Use of best practices and patterns during application design and implementation
• Hands-on experience with monolith, microservice, and serverless architectural styles
• Software development:
• Proficiency in Kotlin / Java, with strong understanding of the JVM ecosystem and interoperability
• Experience integrating LLM technologies and working with AI-driven solutions
• Hands-on expertise in building AI agents using protocols such as MCP and ATA
• Practical experience in writing and performance tuning of complex SQL
• Quality Assurance:
• In-depth proficiency level in JUnit, Mockito
• Previous participation in constant quality improvement on the project: conducting code reviews, setting up quality metrics, and monitoring
• Software Deployment:
• Hands-on experience with application deployment patterns and tools
• Practical experience in infrastructure configuration using popular cloud providers

Desirable:

• Experience in configuring application security aspects
• Practical experience in application performance optimization

What`s in it for you?

• Strong community: Work alongside top professionals in a friendly, open-door environment
• Growth focus: Take on large-scale projects with a global impact and expand your expertise
• Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications
• Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies
• Flexibility: Enjoy flexibility – full remote working possibilities
• Care: We've got you covered with company-paid medical insurance, mental health support, and financial & legal consultations

About us:

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you'll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.

With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation—and your impact reaches millions.

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Explore, empower, engineer with Ciklum

Interested already? We would love to get to know you Submit your application. We can't wait to see you at Ciklum.