B2B Project: Senior Java Developer

Recruitment for

Hays IT Contracting is a cooperation based on B2B rules. We connect IT specialists with the most interesting, technological projects on the market. For our client, a global organization developing large-scale client onboarding systems and new AI-enabled integrations, we are currently looking for a Specialist for the position of Senior Java Developer.

Technologies we use

Expected

• Java
• Spring Boot
• Microsoft Azure
• Kubernetes
• GitLab
• GitHub Copilot

Optional

• Java
• JavaScript
• Spring Boot

About the project

The project focuses on the development and consolidation of large-scale systems supporting client onboarding processes.

An important part of the initiative involves new AI-related integrations, including data extraction from documents and Human-in-the-Loop solutions.

Scope intended for an experienced Senior Software Engineer to take ownership of larger technical topics, from initial analysis and high-level design through implementation.

Your responsibilities

• Develop backend applications using Java and microservices architectures.
• Design technical solutions and communication patterns between distributed services.
• Contribute to integrations involving a large number of systems.
• Independently handle larger technical topics, from analysis and high-level design through implementation.
• Collaborate with architects, developers and other project teams to define and deliver appropriate technical solutions.
• Maintain high code quality based on SOLID and Clean Code principles.
• Perform code reviews and contribute to the quality and maintainability of a large codebase.
• Work with Azure, Kubernetes, CI/CD pipelines and GitLab.
• Use AI-based development tools and agents, including GitHub Copilot, as part of the development process.

Our requirements

• 8+ years of enterprise-level application development experience.
• Solid hands-on experience with JVM programming languages, ideally Java 11+.
• Strong understanding of software design patterns.
• Strong practical understanding of distributed microservices architectures, including service-to-service communication patterns and challenges associated with microservices.
• Experience with relational and document databases.
• Strong understanding and practical application of engineering best practices, including SOLID and Clean Code.
• Experience working in Agile environments.
• Familiarity with cloud-based technologies and Kubernetes.
• Experience working with CI/CD pipelines, for example GitLab CI/CD.
• Experience using agentic LLMs to support the software development process.
• Excellent communication and collaboration skills.
• Ability to independently analyze technical challenges, design solutions and drive larger technical topics through implementation.
• Strong hands-on engineering experience, including the ability to analyze existing code, identify issues and explain technical design decisions.
• English at B2/C1 level.

Optional

• Experience with, or willingness to learn, Java Reactive Programming / Spring WebFlux.
• Experience with NoSQL databases, ideally MongoDB or Cosmos DB.
• Familiarity with BPMN, for example Flowable.

What we offer

• Initial 12-month contract, with possibility of extension
• Cooperation through Hays Poland
• Start Date: ASAP
• Language: English B2/C1

Recruitment stages

• Profile and experience review by the Hays team
• 15-minute conversation with a Hays Recruiter
• A technical meeting with project representatives (up to 2 stages)
• Feedback and cooperation proposal