Senior Java API Developer (AWS + ECS)

Who we are looking for

We are looking for a Java Developer to support the development of enterprise-grade backend services and cloud-native solutions. The role focuses on building and maintaining REST APIs, integration services, and workflow-supporting applications running in AWS environments.

The ideal candidate has solid Java development experience, hands-on exposure to AWS services, and a strong understanding of API design and backend integrations. We welcome both mid-level and senior engineers who are eager to contribute to scalable cloud-based solutions.

Required Qualifications:

• 4+ years of professional experience in Java development
• Strong hands-on experience with Java and backend application development
• Experience designing, developing, and consuming REST APIs
• Practical experience with AWS cloud services
• Experience working with ECS Fargate or containerized applications deployed in AWS
• Experience working with relational and/or NoSQL databases
• Good understanding of Object-Oriented Programming (OOP) principles and software engineering best practices
• Experience with testing, debugging, and application performance optimization
• Familiarity with version control systems and CI/CD practices
• Strong analytical and problem-solving skills
• Ability to work both independently and within cross-functional teams
• Good communication skills English and Polish at least B2+ level
  
• Valid EU work permit

Preferred Qualifications:

• Experience with microservices and distributed systems
• Experience supporting workflow orchestration, integration platforms, or middleware solutions
• Experience working with enterprise-scale APIs and integrations
• Understanding of event-driven architectures
• Experience in Agile delivery environments
• Knowledge of observability, monitoring, and operational best practices in cloud environments

Preferred Technical Stack / Experience

• Java
• REST API Development
• AWS
• ECS Fargate
• Database Technologies (Relational and NoSQL)
• Microservices
• CI/CD Pipelines
• Integration and Orchestration Services

Your future role

• The selected candidate will be responsible for:
• Developing and maintaining Java-based backend applications and microservices
• Building and enhancing REST APIs supporting enterprise integrations and channel services
• Developing services supporting workflow orchestration and system integrations
• Implementing and maintaining cloud-native solutions within AWS
• Working with containerized workloads deployed on ECS Fargate
• Collaborating with architects, developers, and business stakeholders to deliver scalable solutions
• Supporting system integration, testing, troubleshooting, and performance optimization
• Working with relational and non-relational databases supporting backend services and integrations
• Participating in code reviews and following engineering best practices, including CI/CD and automated testing
• Supporting platform reliability, scalability, and maintainability in distributed environments

What we offer

• Permanent employment or contract,
• Medical and health insurance,
• Multisport and other lifestyle benefits,
• Friendly coworkers & team spirit,
• Multiple geographies and clients,
• Work for well-known brands,
• Exposure to trailblazing business and technology projects,
• A place in the first line of a digital transformation,
• Everyday opportunities to influence how and where we do our business,
• A development path to fit your needs.

Selection process

Recruitment journey

• Send your CV in word or pdf format in English.
• Join a quick HR interview (online, 45 minutes).
• Attend a Hiring Manager technical interview (online, 60 minutes).
• Attend a second confirming (business & technical) interview (online, 60 minutes).

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