Senior Java Backend Developer

Description

EPAM is seeking a skilled Senior Java Backend Developer who is passionate about building scalable, high-performance backend services and enjoys working on products used daily by thousands of professionals. You will join a collaborative, agile team developing and enhancing a flagship mobile platform and supporting backend services for a leading global property data and analytics company operating in the real estate technology (PropTech) domain. The client delivers data-driven solutions that power the real estate industry across North America, providing critical tools and insights to agents, brokers, and MLS organisations. Responsibilities Design, develop, and maintain scalable backend services using Java and Spring Boot Build and enhance RESTful APIs supporting mobile and web applications Develop secure, reliable, and high-performance microservices Design and optimize database models and data access layers Integrate with third-party platforms and external APIs Collaborate with mobile developers, frontend engineers, product managers, QA engineers, and architects to deliver high-quality solutions Participate in system design, code reviews, technical discussions, and architectural decisions Troubleshoot production issues and improve application performance, scalability, and reliability Write clean, maintainable, and well-tested code following engineering best practices Contribute to continuous improvement initiatives, including CI/CD, automation, and AI-assisted software development practices Requirements 5+ years of professional software development experience Strong experience with Java and Spring Boot Solid understanding of REST API design and microservices architecture Experience with relational databases such as PostgreSQL, MySQL, or SQL Server Experience with JPA/Hibernate or similar persistence frameworks Knowledge of modern software engineering principles, design patterns, and clean code practices Experience with Git and collaborative development workflows Familiarity with unit and integration testing frameworks Strong analytical, problem-solving, and communication skills Ability to work effectively in an Agile/Scrum environment Availability to work shifted hours (3:00 PM – 11:00 PM Polish time) to align with the North American-based team English proficiency at B2 level or higher Nice to have Experience with cloud platforms (AWS or GCP) Experience with Docker and Kubernetes Knowledge of messaging technologies such as Kafka or RabbitMQ Experience with OAuth2, SSO, JWT, or other authentication mechanisms Familiarity with AI-assisted development tools such as GitHub Copilot or Gemini Experience working with high-traffic, customer-facing SaaS or mobile backend platforms Experience integrating with third-party APIs and enterprise systems Background or interest in the real estate / PropTech domain

Requirements

• 5+ years of professional software development experience

• Strong experience with Java and Spring Boot

• Solid understanding of REST API design and microservices architecture

• Experience with relational databases such as PostgreSQL, MySQL, or SQL Server

• Experience with JPA/Hibernate or similar persistence frameworks

• Knowledge of modern software engineering principles, design patterns, and clean code practices

• Experience with Git and collaborative development workflows

• Familiarity with unit and integration testing frameworks

• Strong analytical, problem-solving, and communication skills

• Ability to work effectively in an Agile/Scrum environment

• Availability to work shifted hours (3:00 PM – 11:00 PM Polish time) to align with the North American-based team

• English proficiency at B2 level or higher

Responsibilities

• Design, develop, and maintain scalable backend services using Java and Spring Boot

• Build and enhance RESTful APIs supporting mobile and web applications

• Develop secure, reliable, and high-performance microservices

• Design and optimize database models and data access layers

• Integrate with third-party platforms and external APIs

• Collaborate with mobile developers, frontend engineers, product managers, QA engineers, and architects to deliver high-quality solutions

• Participate in system design, code reviews, technical discussions, and architectural decisions

• Troubleshoot production issues and improve application performance, scalability, and reliability

• Write clean, maintainable, and well-tested code following engineering best practices

• Contribute to continuous improvement initiatives, including CI/CD, automation, and AI-assisted software development practices

Seniority

• Senior

Nice to have

• Experience with cloud platforms (AWS or GCP)

• Experience with Docker and Kubernetes

• Knowledge of messaging technologies such as Kafka or RabbitMQ

• Experience with OAuth2, SSO, JWT, or other authentication mechanisms

• Familiarity with AI-assisted development tools such as GitHub Copilot or Gemini

• Experience working with high-traffic, customer-facing SaaS or mobile backend platforms

• Experience integrating with third-party APIs and enterprise systems

• Background or interest in the real estate / PropTech domain