Jobs

Our Partner is a global risk management platform that helps online companies prevent fraud, mitigate risks, and grow revenue is looking for Senior Java developer.

Business issues that can be solved with help of our Partner: regulatory compliance, responsible gaming, KYC&KYB procedure automation, transaction analysis, risk management, chargeback mitigation, payment fraud, account theft, device emulation, and many others.

Main Responsibilities:

– development of new functionality (from specifying requirements to full implementation)
– integration of external data providers
– creation and support of REST API methods for communication with own web portal
– work with highly loaded databases
– project support, bug fixing
– release process support
– code cross review

Mandatory Requirements:

– work experience as Java developer for at least 5 years (without frameworks)
– experience with Spring CORE
– deep knowledge of OOP, design patterns, SOLID
– understanding of the principles of data protection in programming
– experience with GIT
– experience in project development and support (preferably in an existing project)
– knowledge of DBs design, including MySQL
– experience with the ELK stack
– knowledge of Docker
– experience with REST

We offer:

– work in an international IT Product company with challenging antifraud solutions
– the ability to influence processes and products
– remote job
– the duration of annual leave – 20 working days
– paid sick leaves
– 50% compensation for foreign language courses or sports/recreational center subscriptions
– compensation for training and conferences

A global travel technology company specializing in content aggregation and distribution is looking for a Senior Java Software Engineer to join our SaaS cloud-based backend team. This role involves developing new features while ensuring scalability, high performance, and system efficiency. The position requires on-site work in our Warsaw office, providing opportunities for close collaboration with the team and direct involvement in key technical discussions.

The project is centered on the development of the service that allows to manage and process orders and changes, giving customers and agents an efficient, responsive, integrated experience, like

Book, hold and issue instant tickets
Sell ancillary products before or after ticketing
Re-issue individual or multi-flight tickets
Process airline-initiated OCNs

You Have

• 5+ years of Java development experience, with expertise in Spring Boot, JPA (JPA2, Hibernate), JUnit, JSON, and API development/integration.
• Strong communication skills, with the ability to convey complex concepts clearly using diagrams and models. -
• Excellent team collaboration skills, with the ability to engage effectively with internal and external stakeholders
• Familiarity with Agile development methodologies.
• Hands-on experience with microservices architecture and cloud-based environments.
• Strong knowledge of Relational Databases (MySQL) and NoSQL (DynamoDB).

• Ability to efficiently reuse components and services for scalable development.

   

Would be a plus

• AWS Developer Certification.
• Understanding and application of clean code principles.

• Strong debugging and problem-solving mindset, with a track record of resolving critical software issues.

   

You Are Going To

• Engage in regular team discussions to exchange ideas, address challenges, and propose improvements.
• Take a proactive approach to teamwork, welcoming feedback and offering constructive suggestions.
• Apply strong analytical skills to troubleshoot issues and implement effective solutions.
• Handle multiple development tasks, managing priorities efficiently.
• Work closely with team leads and Project Managers to align development efforts with project goals.
• Diagnose and fix interface-related issues, debug and enhance application code.
• Maintain comprehensive documentation for application updates and modifications.
• Partner with fellow engineers to develop operational solutions that align with industry best practices.

FAVBET Tech develops software that is used by millions of players around the world for the international company FAVBET Entertainment.

Responsibilities:
— Develop high-quality, scalable software solutions using Java and related technologies;
— Participate in on-call rotation and incident response activities as needed to keep the production stable and reliable;
— Provide ongoing support and maintenance for existing functionality, including bug fixes, performance
optimization, and troubleshooting of production issues;
— Write clean, well-documented code according to coding standards and best practices;
— Participate in code reviews to ensure code quality.

Requirements:
— 7+ years of professional experience with Java, (21+ production experience is a plus)
— Strong proficiency in the Spring ecosystem, including core, boot, cloud, security, and data modules.
— Hands-on experience with gRPC in production environments.
— Hands-on experience with GraalVM
— Practical knowledge/experience with Reactor or similar (Mutiny, Vert.x)
— Practical knowledge/experience with Kubernetes for container orchestration.
— Proficiency in Docker for containerization and deployment 

— Experience with Continuous Integration/Continuous Deployment (CI/CD)
— Production experience with AWS
— Proven track record of working with RabbitMQ/Kafka in production
— Production experience with PostgreSQL, Redis, ClickHouse
— Experience with industry-standard observability tools and frameworks, such as Prometheus, Grafana stack, OpenTelemetry.
— Deep understanding of microservices architectural principles and best practices
— Strong understanding of software quality assurance principles and methodologies
— Familiarity with Agile methodologies like Scrum or Kanban
— Strong communication and collaboration skills, essential for effective teamwork and cross-functional collaboration

We offer:
— 30 days off per year (vacation and sick days)
— Medical insurance
— Free corporate English language courses
— Flexible schedule with full-time work, minimal bureaucracy, no micromanagement, and no time tracking
— A fantastic team of creative and interesting people.

ONLY KATOWICE!!!

We are looking for a Junior Java Developer to join our projects.

About project:

Working on multi telecom related project with big international team. Work format is shadow, you will be hidden from end client and will work with help of main developer.

We are looking for a long-term candidate passionate about startups and eager to contribute to our projects from the ground up.

Requirements:

• From 1 year of experience (only commercial)
• Strong Java core and multithreading skills
• Expertise in Spring Framework (Boot, Data, Security) and Hibernate
• Good understanding of SQL and database design

• Knowledge of design patterns, SOLID principles, and clean architecture

   

Would be a plus:

• Experience with microservices architecture
• Familiarity with Docker, Kubernetes, and CI/CD pipelines
• Cloud experience (AWS, Azure, or DigitalOcean)

• Proficiency in scaling and optimizing high-load systems

   

About NeptunesWe are young product company and looking for motivated collaborators who may share their experience to our products

FAVBET Tech develops software that is used by millions of players around the world for the international company FAVBET Entertainment.

Qualifications:

• 5+ years of professional experience with Java, (21+ production experience is a plus)
• Strong proficiency in the Spring ecosystem, including core, boot, cloud, security, anddata modules.
• Hands-on experience with gRPC in production environments.
• Hands-on experience with GraalVM
• Practical knowledge/experience with Reactor or similar (Mutiny, Vert.x)
• Practical knowledge/experience with Kubernetes for container orchestration.
• Proficiency in Docker for containerization and deployment
• Experience with Continuous Integration/Continuous Deployment (CI/CD)
• Production experience with AWS
• Proven track record of working with RabbitMQ/Kafka in production
• Production experience with PostgreSQL, Redis, ClickHouse
• Experience with industry-standard observability tools and frameworks, such asPrometheus, Grafana stack, OpenTelemetry.
• Deep understanding of microservices architectural principles and best practices
• Strong understanding of software quality assurance principles and methodologies
• Familiarity with Agile methodologies like Scrum or Kanban

• Strong communication and collaboration skills, essential for effective teamwork andcross-functional collaboration

   

Responsibilities:

• Provide technical leadership and guidance to the software engineering team
• Lead the design and implementation of scalable, high-performance software solutions,with a focus on reliability, security, and maintainability.
• Participate in code reviews to ensure code quality.
• Collaborate with cross-functional teams to define technical requirements, architecture,and design decisions for new features and enhancements.
• Provide ongoing support and maintenance for existing functionality, including bug fixes,performance optimization, and troubleshooting of production issues
• Collaborate with operations and support teams to implement monitoring and alerting
• Participate in on-call rotation and incident response activities as needed to keepthe production stable and reliable.
• Lead, mentor , and coach a team of engineers
• Facilitate knowledge sharing and technical skill development within the team
• Monitor project progress, and identify risks and issues to ensure project delivery
• Monitor and take responsibility for software non-functional metrics.
   

We offer:

• 30 days off per year (vacation and sick days)
• Medical insurance
• Free corporate English language courses
• Flexible schedule with full-time work, minimal bureaucracy, no micromanagement, and no time tracking
• A fantastic team of creative and interesting people.

Our client is a global software company specializing in workplace and asset management solutions. The mission is to help organizations optimize physical resources by providing innovative, cloud-based software and services.
With a presence in over 150 countries, our client serves more than 10,000 customers across various industries, enabling them to make informed decisions, drive operational excellence, and achieve business growth. Comprehensive solutions cover all stages of real estate, facilities, and asset management, from capital planning to IoT-based monitoring and control.
Headquartered in the U.S. with major offices worldwide, we are dedicated to unifying the built environment and transforming how people and systems work together.

You will join the team working on an integrated facility management solution designed to streamline and optimize the management of facilities, assets, field services, energy, and refrigerants.

Requirements:

• 5+ years of experience in development of Java-based web applications
• Strong proficiency in Java, J2EE
• Expertise in developing REST APIs
• Practical experience with JS, HTML, CSS
• Knowledge of Oracle 19c
• Hands-on experience with Docker containers, Kubernetes
• Working experience with MS Azure 
• Proficient in using development tools like IntelliJ, Postman, Swagger
• Strong understanding of version control, security best practices, and Agile methodologies, especially SAFe
• Familiarity with est-driven development
• Excellent communication and teamwork skills, with the ability to mentor junior developers.

Responsibilities:

• Building new features on the top of existing web application, using Java, J2EE
• Support of existing applications (bug fixes, security updates, technical improvements)
• Work, using SAFe methodology, to deliver incremental value, actively participating in code reviews, sprint planning, and design discussions.
• Troubleshoot and debug complex issues in production and staging environments.
• Write clean, maintainable, and efficient code while adhering to coding standards and best practices.

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

🌍 Location: Warsaw, Poland.

We are looking for a Java Developer to join our client - an Israeli software product company with an R&D office in Warsaw.

Responsibilities:

• Develop, test, maintain, and improve backend services and applications, primarily using Java.
• Contribute to the implementation of scalable and robust backend solutions meant primarily for internal tooling.
• Analyze functional requirements.
• Focus on creating solutions that provide value to internal users.

Requirements:

• BA/B.Sc. in Computer Science or a related technical field, or equivalent practical experience.
• 4+ years of software development experience in Java.
• Advanced knowledge in Object-Oriented Design and programming concepts.
• Strong problem-solving skills.
• Openness to pass a technical interview involving algorithmic tasks
• Good spoken and written English level — Upper-Intermediate or higher

Nice to have:

• Master’s degree in Engineering, Computer Science, or another technical related field.
• Experience with building cloud (SaaS) applications.
• Familiarity with Agile software development methodologies.
• Experience with technologies and standards such as: Tomcat, Jetty, NginX, Node.js, Jersey, Cassandra, PostgreSQL.
• Strong database design and SQL skills.
• Interest and ability to learn other coding languages as needed.

We offer:

• Opportunities to develop in various areas;
• Compensation package (20 paid vacation days, paid sick leaves);
• Flexible working hours;
• Medical Insurance;
• English courses with a native speaker, yoga (zoom);
• Paid tech training and other activities for professional growth;
• Hybrid work mode (∼3 days in the office);
• International business trips
• Comfortable office.

• Project Description:

  Our client is a Swiss leader in online trading, serving over 500,000 clients who can trade more than 3 million products through highly performant and secure platforms. In addition to various online trading products, including stocks, bonds, funds, derivative products, and cryptocurrencies, we also offer Forex, Robo-Advisory, and Mortgage solutions.
  
  Since 2012, we have partnered with the client to develop innovative and cutting-edge digital solutions that help customers achieve their investment goals. Our solutions are continuously evolving, transitioning into atomic microservices and self-contained systems.
  
  The team is a distributed cross-functional group working as a single unit across onshore and offshore locations. It owns the full delivery lifecycle: from feature design and implementation to support and maintenance. Work is split between developing new functionality and evolving existing systems, with rotation based on project priorities. Engineers participate in technical discussions, contribute to design decisions, and are expected to deliver maintainable code and thoughtfully designed solutions.

   

• Responsibilities:

  - Design and develop modern web applications and backend services.
  - Extend and refactor existing systems as part of ongoing product evolution.
  - Implement business features and actively contribute to architectural and design decisions.
  - Participate in estimations and drive technical improvements as part of the team's development process.
  - Conduct code reviews and collaborate with peers to maintain codebase standards.

   

• Mandatory Skills Description:

  - At least 3+ years of proven experience in a Software Developer position
  - Java core, Java 17 features
  - Experience with Frontend: React, Redux, Javascript/TypeScript, HTML, CSS
  - OOP/OOD knowledge, design patterns
  - Spring framework, IOC
  - RESTfull services
  - Unit testing frameworks (JUnit, Mockito)
  - SQL knowledge, any RDBMS, Oracle is a plus
  - Distributed version control system
  - CI tools experience

An innovative blockchain technology company, is looking for Principal EVM Software Engineer to work remotely.

It's a technology company that uses a unique, patented consensus algorithm for the fully open-source platform. The platform's network services include smart contracts based on Solidity, as well as a native tokenization and consensus service used to create decentralized applications.
This cutting-edge technology is recognized as an alternative to traditional blockchain solutions due to its superior speed and scalability.
Platform’s public network is governed by industry-leading organizations, spanning 11 sectors and 14 regions who oversee the development and direction of the decentralized platform.

The company's management board includes IBM, Boeing, Google, Deutsche Telekom, LG, and others.

You will be contributing to the performance and optimization of the platform native services (Java) and the web3 services (JS/TS) that process transaction bytes to transform the network node states and expose network block, transaction, and account data.

The company offers unlimited vacation and sick leave, stock options, paid work-related education/certifications, and workplace equipment.

Requirements: deep software development experience with Java, experience with JavaScript, people management and blockchain experience.
Practical experience with EVM-based blockchain wiil be a plus.
 

Currently, one of our clients is looking for a talented Java Backend Developer to join their innovative team. In this role, you will be responsible for designing, developing, and maintaining high-performance Java-based applications and services that enable seamless blockchain integration. Your work will directly impact the capabilities of our platform and enhance the experience for the users.

Responsibilities:

— Design, develop, and maintain scalable, high-performance Java applications and services.
— Implement software solutions that extend platform functionalities and improve user experiences.
— Collaborate with cross-functional teams to analyze requirements, define solutions, and deliver new features rapidly.
— Conduct code reviews and participate in quality assurance processes to maintain high coding standards.
— Troubleshoot and resolve performance issues, bugs, and other technical challenges efficiently.
— Stay updated with emerging technologies and trends in blockchain, backend development, and software best practices.

Qualifications:

— Proven experience as a Java Developer with a strong background in backend development.
— Proficiency in modern Java, including asynchronous frameworks such as Eclipse Vert.x, SmallRye Mutiny, or RxJava.
— Deep understanding of networking concepts and HTTP protocols.
— Familiarity with JSON-RPC communication protocol.
— Exposure to blockchain protocols is a plus.

What We Offer:

— 18 vacation days, 5 sick days.
— Opportunity to work at the forefront of blockchain technology and digital innovation.
— Dynamic, fast-paced environment supporting professional growth.
A talented team of professionals dedicated to technological excellence.

We are seeking a Senior Backend Developer specialized in Java and Spring Boot to enhance and maintain our backend APIs of one of our AI-Enhanced marketplace platforms. This position requires deep expertise in scalable microservices design, enterprise-level security, and integration with modern AI development tools. You will work on features such as marketplace transactions, vendor management, product catalog systems, and robust APIs that support our comprehensive marketplace ecosystem while leveraging cutting-edge AI tools like Cursor for accelerated development.

Key Responsibilities

Enterprise-Scale Architecture

• Design and maintain high-availability backend infrastructure for large volumes of marketplace transactions and user interactions
• Build resilient microservices architecture using Spring Boot and containerization technologies

Java/Spring Boot Development

• Develop and optimize RESTful APIs using Spring Boot 3.x and Java 17+ for marketplace operations
• Implement JWT authentication with role-based permissions for secure API access
• Integrate Stripe payment processing for marketplace transactions
• Work with Metricool API integration for analytics and reporting features
• Implement Mailgun for automated email communications
• Leverage AI development tools (Cursor) to accelerate code development, testing, and debugging processes

Security & Compliance

• Implement JWT authentication and role-based access control for secure API access
• Ensure PCI DSS compliance for payment processing and data protection standards for customer information
• Work with Vault for secrets management and implement encryption for sensitive marketplace data

Performance & Scalability

• Optimize PostgreSQL (primary) databases and manage MongoDB legacy data migration
• Deploy and monitor containerized applications using Docker and Kubernetes for seamless auto-scaling during peak marketplace activity
• Use AI tools to optimize deployment processes and infrastructure monitoring

DevOps & CI/CD

• Collaborate in GitLab CI/CD processes ensuring robust code delivery pipelines
• Implement infrastructure as code and leverage AI for deployment automation
• Provide on-call production support and troubleshoot issues across environments
• Assist in production deployments ensuring zero-downtime releases

Collaboration & AI-Enhanced Development

• Work closely with front-end engineers, QA, and product managers to deliver secure, testable, and maintainable marketplace solutions
• Integrate AI workflows into team development processes using tools like Cursor for improved productivity
• Conduct code reviews, champion best practices, and mentor junior developers in both traditional and AI-assisted development techniques

Required Qualifications

Experience

• 7+ years in backend development, with at least 3+ years in Java 17+ and Spring Boot 3.x frameworks
• Proven experience building marketplace platforms or payment processing systems

Technical Expertise

• Database Mastery: Expertise in PostgreSQL (primary) and MongoDB experience for legacy system migration
• Security: Strong experience with JWT authentication and role-based permissions
• Payment Integration: Experience with Stripe or similar payment processing systems
• Cloud Services: Hands-on experience with AWS S3 for file storage and management
• API Documentation: Proficiency with OpenAPI 3.0/Swagger for API documentation
• Containerization: Proficiency with Docker and Kubernetes for application deployment

Cloud & DevOps

• Familiarity with cloud platforms (AWS, GCP, Azure, or Digital Ocean)
• Hands-on experience with GitLab CI/CD pipelines for automated deployment

AI-Enhanced Development

• Experience with AI coding assistants (Cursor or similar tools)
• Knowledge of leveraging AI for automated testing, code review, and deployment optimization

Enterprise Product Building

• Proven track record of delivering enterprise marketplace solutions, addressing security, compliance, and performance concerns at scale
• Experience supporting production environments with high availability requirements

Soft Skills

• Excellent communication and collaboration skills
• Strong problem-solving mindset and debugging capabilities
• Comfort working in cross-functional Agile teams
• Attention to detail and commitment to code quality

How to Apply

Please submit your resume along with:

• A brief cover letter highlighting your relevant marketplace platform and Java development experience
• Links to your GitHub profile or portfolio showcasing relevant projects
• Certifications or notable achievements in backend development

• Project Description:

  Our client is a Swiss leader in online trading, serving over 500,000 clients who can trade more than 3 million products through highly performant and secure platforms. In addition to various online trading products, including stocks, bonds, funds, derivative products, and cryptocurrencies, we also offer Forex, Robo-Advisory, and Mortgage solutions.
  
  Since 2012, we have partnered with the client to develop innovative and cutting-edge digital solutions that help customers achieve their investment goals. Our solutions are continuously evolving, transitioning into atomic microservices and self-contained systems.
  
  The team is a distributed cross-functional group working as a single unit across onshore and offshore locations. It owns the full delivery lifecycle: from feature design and implementation to support and maintenance. Work is split between developing new functionality and evolving existing systems, with rotation based on project priorities. Engineers participate in technical discussions, contribute to design decisions, and are expected to deliver maintainable code and thoughtfully designed solutions.

   

• Responsibilities:

  - Design and develop modern web applications and backend services.
  - Extend and refactor existing systems as part of ongoing product evolution.
  - Implement business features and actively contribute to architectural and design decisions.
  - Participate in estimations and drive technical improvements as part of the team's development process.
  - Conduct code reviews and collaborate with peers to maintain codebase standards.

   

• Mandatory Skills Description:

  - At least 3+ years of proven experience in a Software Developer position
  - Java core, Java 17 features
  - Experience with Frontend: React, Redux, Javascript/TypeScript, HTML, CSS
  - OOP/OOD knowledge, design patterns
  - Spring framework, IOC
  - RESTfull services
  - Unit testing frameworks (JUnit, Mockito)
  - SQL knowledge, any RDBMS, Oracle is a plus
  - Distributed version control system
  - CI tools experience

   

• Nice-to-Have Skills Description:

  - Education: Bachelor's / Master's degree in computer science or computer engineering
  - Experience in finance/banking business domain
  - Docker
  - Unix usage experience

   

• Languages:
  • English: B2 Upper Intermediate
  • Ukrainian: C2 Proficient

Job Description

Minimum of 7 years of experience in software development, with a focus on designing and implementing highly scalable web applications, data pipelines, and cloud-based microservices

Proficiency in Java programming language and related technologies. Experience with frameworks such as Spring, Hibernate, and Apache Kafka, and cloud-native services is highly desirable

Proven experience in UI/Angular development

Strong understanding of database concepts and experience with SQL and NoSQL databases (e.g., MySQL, Oracle, Cassandra, DynamoDB, Redis).

Familiarity with cloud platforms (e.g., AWS, Azure, Google Cloud) and experience deploying applications in cloud environments is advantageous

Experience with microservices and event-driven architectures

Strong analytical and problem-solving skills with the ability to troubleshoot complex issues and implement effective solutions

Excellent written and verbal communication skills with the ability to articulate technical concepts clearly and effectively

Ability to work both independently and collaboratively in a fast-paced, agile environment. Strong team player with a positive attitude and a passion for technology

Job Responsibilities

Architect, design, and develop highly scalable, reliable web scale applications, tools, and automation frameworks to meet business requirements.

Implement cloud-based microservices leveraging event-driven architectures.

Collaborate with cross-functional teams to design and build efficient and robust data pipelines for batch, near-real-time, and real-time processing using Java technologies.

Optimize applications, data pipelines, and microservices for scalability, performance, and efficiency to handle large volumes of data and traffic in a cloud environment.

Ensure adherence to coding standards, best practices, and software development methodologies. Perform code reviews and provide constructive feedback to team members.

Implement monitoring and alerting solutions to ensure the reliability and availability of applications, data pipelines, and microservices. Participate in troubleshooting and resolution of production issues.

Create and maintain technical documentation, including design documents, architecture diagrams, and system documentation.

Collaborate effectively with cross-functional teams, including product management, QA, and operations. Communicate technical concepts and solutions to both technical and non-technical stakeholders.

Department/Project Description

Our client is innovative manufacturer of medical devices in the United States which produces a devices and software applications.

At this project, you will have a great opportunity to be involved into the full development life cycle of medical software which is intended to help individuals by processing certain information taken from medical devices to identify health trends and to track daily activities. As additional there are opportunities to work with medical devices, in scope of end-to-end testing.

Description

Candidate will be responsible for development, maintenance and support of entertainment and media applications on embedded devices for home media entertainment.

Requirements

Experience in the development of at least one of the following languages C++JavaJS.NET
At least an intermediate English level
Ability to work in an agile software development environment, to be flexible to requirements and design change
Proactive problem-solving abilities
Knowledge of BrightScript and Roku platform development experience, networking experience, media applications development experience is a plus.

Job responsibilities

Development, maintenance, and support of entertainment and media applications on Roku platform

Join Finergy, a small, expert-led team building scalable platforms for instant payments and merchant services. We're looking for a Java developer who’s comfortable working on backend systems that need to be fast, secure, and reliable.
 

You'll help design and build APIs, handle real-time processing, and integrate with banks and payment systems. We keep things lean - no bureaucracy, just smart people solving real problems.
 

What we’re looking for:

• Solid Java (preferably with Spring Boot)
• Experience with REST APIs and databases
• Good understanding of system design and clean code
• Interest in financial systems or real-time processing is a plus