Senior Java Developer

Work mode

This role is HYBRID – NOT REMOTE: 3 days remote / 2 days from the office in Warsaw. We are only considering candidates based in Warsaw.

Senior Java Developer

About Consid

Consid is an award-winning IT and consulting company founded in Sweden, with a strong presence across Scandinavia and Europe, including Poland. We partner with leading enterprises to build modern, scalable digital solutions, combining strong engineering culture with long-term, trust-based collaboration. At Consid, we value ownership, quality, and continuous development.

Who We’re Looking For

We are looking for Java Backend Developers to join a Consumer IT team working on modern, business-critical digital platforms. You enjoy building high-quality backend services, care about performance and reliability, and want to work in a collaborative, DevOps-oriented environment with modern technologies.

About the Role

In this role, you will design and build scalable, high-performing backend services and APIs that power large-scale digital platforms. You’ll take part in modernizing existing systems into cloud-native, event-driven architectures, focusing on reliability, security, and performance. You will work closely with other developers, architects, and product teams as part of a cross-functional DevOps setup.

Key Responsibilities

• Design, develop, and maintain scalable backend services and REST APIs

• Contribute to the transformation of existing systems into cloud-native, event-driven solutions

• Ensure high standards of code quality, performance, security, and reliability

• Participate in architectural decisions and technical improvements

• Write and maintain automated tests and support a TDD mindset

• Monitor, troubleshoot, and optimize applications in production

• Collaborate closely within a DevOps team across the full development lifecycle

Required Skills & Experience

• Strong experience with Java 11/17+ (Streams, Records, functional APIs, concurrency, performance tuning)

• Solid knowledge of Spring Boot 3.x / Spring Framework 6.x

• Experience designing and implementing REST APIs

• Strong understanding of OOP, design patterns, and clean code principles

• Hands-on experience with JUnit 5, Mockito, and automated testing

• Very good knowledge of Oracle SQL, including performance optimization, joins, and indexing

• Experience with microservices architectures

• Familiarity with RabbitMQ and third-party API integrations

• Experience with AWS (EC2, S3, RDS, IAM)

• Knowledge of Kubernetes and modern CI/CD pipelines

• Understanding of logging, monitoring, and observability practices

Preferred Qualifications

• Experience with Kafka

• Caching solutions such as Redis or Hazelcast

• Advanced Kubernetes usage (EKS, Helm)

• Event-driven architecture design

• Experience with ELK stack or Splunk

• Knowledge of Resilience4j

• Security best practices (OAuth, JWT, OWASP Top 10)

Recruitment Process

Application Review – We carefully review all applications and contact candidates whose profiles best match the role.

Meet the Team – An interview with our Head of Operations & Talent Acquisition (conducted in English).

Technical Interview – A technical discussion focused on your experience, architecture decisions, and backend expertise.

Final Decision

Additional Information

• This is a hybrid role: 3 days remote / 2 days from the office in Warsaw.

• We are only considering candidates based in Warsaw.

• Applications must include a CV in English.