CrawlJobs Logo
Brightstar Lottery Logo Brightstar Lottery · IT - Software Development

Backend Java Developer

Poland, Warsaw · Job Posted February 08, 2026
Apply Position
Job Link Share

Job Description

As a Mid-Level Java Developer, you will play a pivotal role in the design, development, and maintenance of high-performance backend systems. You’ll collaborate with product managers, architects, and developers to ensure our solutions are scalable, secure, and future-ready. We encourage the use of Generative AI tools like GitHub Copilot to boost innovation and productivity.

Job Responsibility

  • Develop robust, configurable applications using Java 17+ and Spring Boot to effectively meet the diverse requirements of multiple customers
  • Ensure the efficiency of PostgreSQL databases for scalable solutions
  • Ensure security, scalability, and performance in all backend solutions
  • Employ Bash/Shell scripting for automation and comprehensive system integration tasks
  • Contribute to application deployment using Docker and Kubernetes, while utilizing Helm for package management
  • Communicate effectively in English (B2/C1 level) within distributed teams
  • Participate actively in scrum events
  • Collaborate with other engineering teams
  • Contribute to design discussions and mentor junior developers

Requirements

  • Bachelor’s degree in Computer Science or related field, plus 5 years professional backend development experience
  • Master’s degree in Computer Science or related field, plus 3 years professional backend development experience
  • Expertise in Java 17+
  • Proficiency in Spring, Spring Boot, Spring Security
  • Cloud native application development
  • Experience with Maven for project building
  • Experience with SQL databases
  • Proficiency in Git & GitHub (including pipeline development)
  • Knowledge of JUnit, AssertJ and Hamcrest
  • Experience with CI/CD process and tools
  • Kubernetes, Helm
  • Bash/Shell scripting
  • Strong English communication (B2/C1 level)
  • Proven experience in enterprise environments
  • Experience working in Agile teams (Scrum/Kanban)
  • Ability to work independently and collaborate effectively within a distributed team

Nice to have

  • Experience with PostgreSQL
  • Hibernate/JPA
  • Event-driven architecture & Kafka
  • Microservices architecture principles
  • Python scripting
  • Knowledge of C and/or Go (Golang)
  • Experience with JIRA or similar tools
  • Logging & monitoring tools (Kibana, Grafana, Prometheus)
  • Security best practices (OWASP Top 10, secure coding)
Brightstar Lottery - All Job Offers

Looking for more opportunities?

Search for other job offers that match your skills and interests.

Suggested Tags: Frontend Developer Secretary Talent Manager Salesforce Administrator Data Analyst
Similar Jobs for

Backend Java Developer

8 matching positions

Backend Java Developer

We are seeking a motivated and experienced Application Developer . The candidate...
Location
Location
India , Pune
Salary
Salary:
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's degree in Computer Science, Software Engineering, or a related field
  • 3-5+ years of experience in application development with a strong focus on Java
  • Proven experience with the Spring Boot framework for building microservices and enterprise applications
  • Solid experience working with Oracle databases, including SQL, PL/SQL, and performance tuning
  • Familiarity with API design and development (RESTful services)
  • Understanding of architectural principles, including microservices, cloud-native development (e.g., OpenShift), and scalable systems
  • Experience with version control systems (e.g., Git) and CI/CD tools
  • Knowledge of security concepts and authentication mechanisms (e.g., COIN)
  • Strong problem-solving skills and attention to detail
  • Excellent communication and interpersonal skills, with the ability to work effectively in a team environment
Job Responsibility
Job Responsibility
  • Design, develop, and maintain high-performance, fault-tolerant applications using Java and the Spring Boot framework
  • Work with Oracle databases, including schema design, query optimisation, and data management
  • Participate in the entire software development lifecycle, from requirements gathering and analysis to deployment and support
  • Collaborate with product managers, architects, and other developers to define technical solutions and ensure successful project delivery
  • Integrate applications with various internal and external systems and APIs, ensuring seamless data flow and functionality
  • Implement and adhere to established coding standards, security best practices, and architectural guidelines
  • Contribute to CI/CD pipelines, ensuring automated testing and efficient deployment processes
  • Troubleshoot and resolve complex technical issues, ensuring high availability and performance of applications
  • Stay updated with emerging technologies and industry trends, continuously seeking to improve development practices and tools
  • Fulltime
Read More
Arrow Right

Backend Java Developer

Are you a highly skilled and motivated Software Engineer looking to make a signi...
Location
Location
Poland , Warsaw
Salary
Salary:
189660.00 - 322940.00 PLN / Year
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 4-6 years in systems analysis and programming of software applications
  • Strong expertise in core Java, collections, concurrency, and streams
  • Deep experience with the Spring framework (Boot, MVC, Data, etc.), Hibernate, and RESTful API development
  • Excellent knowledge of Microservices architecture, algorithms, data structures, and design patterns
  • Proficient in Test-Driven Development (TDD) using frameworks like JUnit and Mockito
  • Solid understanding of SQL and comfortable working in Linux environments
  • Experience with messaging (JMS, Kafka), containerization (Docker, Kubernetes), and optionally distributed caches (Apache Gemfire)
  • Working knowledge of Agile project management and proven ability to collaborate effectively in a fast-paced, global team environment
  • Bachelor’s degree/University degree in Computer Science, Engineering, or a related field, or equivalent practical experience
Job Responsibility
Job Responsibility
  • Innovate & Develop: Design, develop, and implement robust and scalable application systems and programs for the Margin Calculation Services and reporting, aligning with strategic technology initiatives
  • Problem Solve: Consult with users, clients, and other technology groups on issues, and recommend programming solutions
  • Analyze complex technical and business challenges, and propose innovative solutions that enhance system functionality and business processes
  • Project work: Monitor and guide all phases of the software development lifecycle, from analysis and design through construction, testing, and implementation, ensuring timely and high-quality project delivery
  • Provide user and operational support on applications to business users
  • Strategic Impact: Utilize your expertise in application development to make evaluative judgments, recommend security measures, and contribute to post-implementation analysis, ensuring optimal system design and functionality
  • Collaboration & Consultation: Partner closely with project managers, business stakeholders, and senior managers to translate complex business requirements into well-architected technical solutions
  • Consult with users and other technology groups, providing advanced programming insights and support
  • Operational Excellence: Ensure adherence to best practices and essential procedures
  • Autonomy & Ownership: Operate with a high degree of independence and judgment, taking ownership of critical initiatives and driving them to successful completion
What we offer
What we offer
  • Employer paid Defined Contribution Pension Plan contribution of 6% of employee’s pensionable earnings (PPE Program)
  • Employer paid Private Medical Care Package for employees and Private Medical Care Packages for certain family members available at preferential rates
  • Employer paid Life Insurance Program for employees and Life Insurance for certain family members available at preferential rates
  • Employee Assistance Program financed by Employer
  • Paid Parental Leave Program (maternity and paternity leave
  • statutory and 2 weeks additional paid paternity leave)
  • Sport Card for employees subsidized via Social Benefits Fund and Sport Cards for certain family members available at preferential rates
  • Additional benefits from Company’s Social Benefit Fund, in particular: Holidays Allowance, support for sport and cultural activities, team building events
  • Additional day off for volunteering
  • Cafeteria/ flex benefit – a company benefits system which enables employees to select and purchase benefits offered by a provider and available for employees on the platform
  • Fulltime
Read More
Arrow Right

Backend Java Developer

Appfire is looking for a Backend Java Developer to help evolve a modern, cloud-b...
Location
Location
Bulgaria , Sofia
Salary
Salary:
Not provided
themuse.com Logo
The Muse
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Solid Java Foundation: Strong practical knowledge of Java, Spring, Hibernate, and SQL
  • Clean Code & Patterns: A good understanding of SOLID principles and common design patterns to keep the codebase maintainable
  • Testing & Tools: Proficiency in JUnit/Spock, Git, Maven, and Docker
  • Production-Ready Mindset: Experience in evolving and scaling established systems (beyond just greenfield projects) and a focus on long-term code maintainability
  • Performance Awareness: Ability to use profiling tools and a focus on writing efficient code that performs well under load
  • Cloud Basics: Understanding of SaaS architecture and cloud environments (AWS or GCP)
Job Responsibility
Job Responsibility
  • Designing and implementing new functionalities while maintaining and optimizing existing ones
  • Ensuring high code quality through rigorous testing (unit, integration) and peer code reviews
  • Collaborating with Product Owners, UX/UI designers, and frontend teams
  • Solving performance-related challenges to ensure system stability and speed
  • Contributing to technical discussions and helping the team solve production issues
What we offer
What we offer
  • 25 paid days off, regardless of years of experience
  • Private healthcare
  • Sofia public transport card
  • Multisport card
  • Development opportunities via our Appfire University
  • Health Insurance
  • Dental Insurance
  • Vision Insurance
  • Life Insurance
  • Short-Term Disability
Read More
Arrow Right

Backend Java Developer

We are looking for an experienced Software Engineer to join our team in Minneapo...
Location
Location
United States , Minneapolis
Salary
Salary:
Not provided
https://www.roberthalf.com Logo
Robert Half
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • At least 5 years of experience in software development, with expertise in Java and Kotlin
  • Proven ability to design and build large-scale systems with clean, maintainable, and scalable code
  • Familiarity with modern development tools such as version control, CI/CD pipelines, containers, and cloud architectures
  • Strong knowledge of testing methodologies, including unit, integration, and end-to-end testing
  • Ability to communicate technical concepts effectively to both technical and non-technical audiences
  • Experience mentoring entry-level engineers and providing constructive feedback during code reviews
  • Interest in industry trends and openness to adopting new technologies aligned with business goals
Job Responsibility
Job Responsibility
  • Design, develop, and maintain backend systems using Java and Kotlin to ensure scalability and performance
  • Collaborate with product, design, and QA teams to clarify requirements and propose effective solutions
  • Evaluate code structure and processes, making suggestions to improve maintainability and efficiency
  • Diagnose and resolve production and development issues using debugging strategies and data analysis
  • Contribute to technical designs and architectural decisions that align with best practices and team objectives
  • Support less experienced engineers through onboarding and code reviews to encourage growth and development
  • Identify integration points and dependencies across teams and services, addressing them proactively
  • Implement testing practices, including unit, integration, and end-to-end tests, to ensure code quality
  • Explore opportunities to incorporate AI and emerging technologies into development processes
  • Maintain accountability for features and services from planning through production support
What we offer
What we offer
  • Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance
  • Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan
Read More
Arrow Right

Backend Java Developer

Location
Location
United States , Princeton
Salary
Salary:
Not provided
besthtech.com Logo
Best High Technologies
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor of Science degree in Electrical Engineering
  • 3 months experience
Job Responsibility
Job Responsibility
  • Develop, test, manage and support CL3n, RAROC and CHET Application
  • remediate application security vulnerabilities and upgrade application to a higher and newer version
  • Debug and test codes using Postman for RESTful methods
  • Use JBoss-eap-6.4 and 7.1 as deployment server, Jenkins for continuous integration and delivery
  • Use Git, BitBucket and Nexus Repository for version control
  • Remediate library security vulnerabilities for several Commercial Lending CL3n APIs
  • Use Sonatype and Veracode for detecting and testing vulnerabilities during building and compiling period
  • Disable HTTPs transaction protocol using TLS1 and SSL
  • Make sure the Transport Layer Security version is 1.2 so that the CL3n APIs can work perfectly and safely with Salesforce developing platform
  • Support AMCB Maestro Release Team, Salesforce nCino developing team for application technique problems related to CL3n APIs side
Read More
Arrow Right

Backend Java Developer

Location
Location
India , Delhi; Noida
Salary
Salary:
Not provided
thirdeyedata.ai Logo
Thirdeye Data
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Java 8/9
  • Core Java
  • Design Patterns (beyond Singleton/Factory)
  • Web Services Development (REST & SOAP)
  • XML & JSON processing
  • CI/CD pipelines
  • Strong experience in integration component development using Java 8/9 & SOA
  • Deep knowledge of integration architecture and design patterns
  • Hands-on experience with tools such as Eclipse, NetBeans, JIRA, Confluence, Bitbucket, SVN
  • Exposure to modern IT trends: Cloud Platforms, DevOps, Low-Code, Intelligent Automation
Job Responsibility
Job Responsibility
  • Write design specifications and user stories for assigned modules
  • Develop backend components/classes and support QA teams with test cases
  • Maintain coding best practices and conduct peer code reviews
  • Participate in Scrum ceremonies (Daily Standup, Planning, Retro, Demos)
  • Identify technical/design/architecture risks and create mitigation plans
  • Adhere to prescribed development processes and documentation standards
  • Collaborate with Architects and cross-functional teams on technical issues, demos, POCs, and proposals
  • Contribute to internal knowledge repositories, reusable accelerators, and IP creation
  • Mentor junior developers and provide constructive feedback
  • Deliver internal training on new technologies
  • Fulltime
Read More
Arrow Right

Backend Java Developer

Seeking a Backend Java Developer (French Speaker): Rhino, are you there? At WE A...
Location
Location
Portugal , Porto
Salary
Salary:
Not provided
wearemeta.io Logo
We Are Meta
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • At least 3 years of experience as a Back-End Developer, with a strong focus on Java, Spring, and Spring Boot
  • Solid understanding of relational and non-relational database systems
  • Proficiency with version control systems, especially GIT
  • Familiarity with container orchestration tools, specifically Kubernetes
  • Experience with CI/CD pipelines and cloud platforms (Plus)
  • Understanding of microservices architecture and best practices (Plus)
  • Knowledge of RESTful APIs and web services development (Plus)
  • Fluent in French (B2) and proficient in English (B2)
  • Availability for hybrid model in Porto, Portugal
What we offer
What we offer
  • Welcome kit
  • Opportunities for career progression
  • Health insurance
  • Coverflex meal card
  • Other protocols and special discounts
Read More
Arrow Right

Backend Java Developer

Seeking a Backend Java Developer: Rhino, are you there? At WE ARE META, we focus...
Location
Location
Portugal
Salary
Salary:
Not provided
wearemeta.io Logo
We Are Meta
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • A minimum of 5 years of experience in software development, with a strong focus on Java backend development
  • Solid knowledge of object-oriented programming principles and design patterns
  • Experience with Terraform
  • Experience with unit testing, integration testing, and test-driven development (TDD, Shift-Left)
  • Proficiency in Git and continuous integration/continuous deployment (CI/CD)
  • Knowledge in Kafka
  • Experience with Kubernetes
  • Experience with GraphQL Federation
  • Knowledge in Azure Cloud
  • Experience with Spring Boot and other relevant backend frameworks (plus)
What we offer
What we offer
  • You’ll get a welcome kit
  • Opportunities for career progression
  • Live on the edge with our health insurance
  • Coverflex meal card
  • Other protocols and special discounts
Read More
Arrow Right