Senior Java Developer Job at efficy (Warsaw)

Senior Java Developer

efficy

Location:
Poland , Warsaw

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

As a Senior Java Developer in our development team, you will be instrumental in building and evolving our cloud-native, microservice-based platform. Your work will directly contribute to the scalability, reliability, and performance of our systems, enabling seamless experiences for our users and empowering internal teams. You’ll help shape the technical direction, improve development practices, and foster a culture of engineering excellence across the organization.

Job Responsibility:

Implement new features and solve complex engineering challenges within a modern, cloud-native microservice architecture
Contribute to the evolution of development processes, system architecture, tools, and practices to enhance team productivity and developer experience
Collaborate with other development teams to ensure smooth cross-team integration and alignment
Proactively monitor and respond to system disruptions, working to prevent issues before they arise

Requirements:

Bachelor's degree in computer science or a related field
5+ years of professional software development experience
Strong background in architecture, security, and operational excellence
Experience working with AWS and Docker in production
Confidence using services like ECS, RDS, API Gateway, CloudWatch, and IAM
Comfortable managing cloud infrastructure hands-on
Creative and solution-oriented
Takes ownership of work
Writes efficient, maintainable code
Collaborative team player thriving in agile environments

Nice to have:

AWS certifications or equivalent evidence of advanced AWS competency
Background in both development and technical operations / infrastructure / system administration
Experience with distributed systems engineering
Advanced knowledge of NoSQL and SQL database technologies
Experience with query engines and data warehouses such as Amazon Redshift and Athena
Experience with data platforms and data pipeline engineering
Experience with domain-specific languages (DSL), including parsing and transpilation to other languages, lexical analysis and abstract syntax tree (AST) manipulation
Professional experience with building SaaS software, especially from web analytics or digital marketing

What we offer:

Flexibility—hybrid work is part of our DNA
State-of-the-art offices where teamwork is the norm
International growth opportunities and internal mobility
A competitive salary package and a referral program
Engaging events: team lunches, after-work gatherings
Learning opportunities: languages, technology, product knowledge, sales techniques, and leadership development

Additional Information:

Job Posted:
January 06, 2026

Employment Type:

Fulltime

Work Type:

Hybrid work

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