Jobs Java

We build a payment-orchestration platform (a PSP hub) that connects merchants to dozens of payment providers. You'll join one of two small backend teams (5 devs each — seniors, a tech lead, and an architect) building and maintaining the integration services that move real money in production.

You'll be mentored by senior developers and backed by strong QA — a great place to see how real-world systems run at scale.

• Format: Remote · Full-time
• Level: Junior — 0–2 years of commercial Java (strong personal / educational projects count)
• English: B1+ (our tooling, docs, and some partners are in English)

What you'll be working with (our environment — you'll grow into it)

• Java 23, Spring Boot, Apache Camel
• REST APIs, SQS, Redis, PostgreSQL
• Cloud & DevOps: AWS, EKS, Terragrunt, Helm, Flux
• Monitoring: OpenSearch, VictoriaMetrics, Grafana

• GitLab for version control & CI/CD

   

What we're looking for (the essentials)

• Solid Java fundamentals (8+) and a good grasp of OOP
• Basic SQL / PostgreSQL
• Genuine curiosity about backend, cloud, and DevOps — and eagerness to learn
• Good problem-solving, communication, and ownership

Nice to have (bonuses, not requirements — we'll teach the rest)

• Hands-on Spring Boot
• Apache Camel or message queues (SQS, RabbitMQ, etc.)
• Docker / Kubernetes / Helm
• GitLab or other CI/CD
• Any AWS experience (S3, EC2, …)

• Keycloak 26

   

What you'll do

• Build and maintain backend services and provider integrations
• Write clean, tested code — with the team's support
• Debug issues and improve stability
• Learn how we run and deploy on AWS with modern tooling

• Collaborate closely with devs, QA, and DevOps; join code reviews and team discussions

   

How we work / what we offer

• Flexible remote schedule
• Paid sick leave and vacation
• All the equipment you need
• Internal events: open discussions, product meetups, soft-skills training

• Flat structure, no micromanagement, fast decisions

   

Hiring process

1. Intro call (~30 min)
2. Technical interview
3. Short live-coding / pairing session
4. Offer

Ready to grow with a fast-moving team building real fintech infrastructure? Apply and join the journey.

Hello and good vibes to everyone reading this!

We’re currently looking for a Middle+ Java Developer to join our team in a full-time collaboration format.

About us:
Mind Studios specializes in mobile and web app development, helping businesses unlock their potential and turn ideas into profitable products.
Our key domains include: Real Estate, Logistics, Healthcare, Fitness, and Mental Health.

We are looking for a person on a certain e-government project. Roughly we assume that the contract can last from September 2026 till the end of March 2027 with optional prolongation.

About the Project:
The project is a large-scale digital platform from scratch designed to support the administration of various social benefits Western European country through a modular and scalable architecture. The system is structured around two key layers:
— Horizontal functions – these are shared core services used across all benefits (e.g., application review, eligibility checks, document management, communication, payment processing, appeals).
— Vertical functions – these represent individual benefit flows, each with its own set of rules, data requirements, and validation logic.

At the heart of the project is the User Profile, which serves as a central data repository. It collects and stores key personal and household information in a reusable way, allowing different benefit applications to retrieve data without asking the user to re-enter the same information.

In this role, you will need:
— clear and effective communication skills, both verbal and written, ability to convey ideas, information, and messages accurately and efficiently;
— experience in managing diverse project activities (not just coding, but also requirements analysis, preparing estimations);
— ability to analyze information, assess situations, and make decisions based on sound reasoning and logical evaluation;
— analytical thinking, problem-solving abilities, and strategic approach to technical challenges.

What is important to join us:
Must-have requirements
— advanced English, both spoken and written. The developer must communicate confidently with native English-speaking colleagues, participate actively in meetings, clarify requirements, explain technical decisions, and write clear PR descriptions and documentation;
— experience with Java, including modern Java features; the project currently uses Java 21;
— strong commercial experience with Spring Boot, Spring Web/MVC, Spring Data JPA, and Hibernate;
— solid understanding of:

• transactions and entity lifecycle;
• database constraints and data integrity;
• concurrency and idempotency;
• date/time handling;
• validation and error handling.

— strong SQL and relational-database skills. The candidate must be able to investigate existing data, diagnose duplicates and inconsistent states, and design safe schema or query changes;
— experience maintaining and debugging a large existing codebase or multi-module system, including tracing behaviour across services and shared libraries;
— ability to understand complicated business rules and translate incomplete or changing requirements into predictable implementation;
— strong REST API design and integration experience, including request/response contracts, backward compatibility, and OpenAPI;
— experience writing meaningful unit and integration tests with JUnit and Mockito. Regression tests should accompany bug fixes;
— good Git and pull-request practices: focused changes, readable commits, careful reviews, and constructive technical discussion;
— demonstrated ownership: independently reproducing problems, finding root causes, considering edge cases, and communicating risks before implementation;
— willingness to question ambiguous requirements instead of silently making assumptions;
— ability to work effectively in a distributed, highly communicative team.

Nice-to-have requirements:
— commercial experience with Oracle Database and Oracle-specific SQL behaviour;
— experience with Flyway database migrations;
— experience with Kafka or another event-driven messaging platform;
— knowledge of Spring Security, OAuth2/JWT, and Keycloak;
— experience with Camunda/Zeebe or BPMN-based workflows; 
— experience with caching, particularly Caffeine;
— familiarity with Azure DevOps, Maven multi-module builds, Sonar, PMD, Checkstyle, and dependency/security upgrades;
— knowledge of audit logging, personal-data protection, and security-sensitive applications.

About stages:
1st stage: pre-interview with a recruiter;
2nd stage: interview with Team Lead and People Ops;
3rd stage: english test;
4th stage: interview with customer;
5th stage: offer.

About B2Spin

We are B2Spin, and we are dedicated to delivering the best Free-to-Play Social Casino and gaming experiences by creating captivating, engaging, and unique products that are accessible to everyone. We have built a team of talented professionals from all over the globe, who are working to continually improve the experiences of our players. We are not looking to just be part of the industry, but to revolutionize it.

AI-Driven Engineering Culture

We are actively building an AI-driven engineering organization with a clear and deliberate stance: artificial intelligence is a core part of how we build and deliver software — not an experiment, not a trend, and not an optional add-on.

AI is embedded into our engineering workflows, from system design and prototyping to refactoring, testing, and code review. We expect engineers to be fully comfortable working in AI-driven environments and to treat AI as a primary productivity multiplier. Strong engineering judgment, architectural ownership, and accountability remain essential—AI amplifies our engineers, it doesn’t replace responsibility for technical decisions.

What you will be doing
• Design, evolve, and maintain core libraries, framework extensions, and shared components used across all engineering teams
• Take ownership of system performance, scalability, and high-load architecture, ensuring core services can handle massive throughput with low latency
• Proactively monitor production behavior, investigate complex application/database performance bottlenecks, and introduce advanced metrics, dashboards, and alerting systems
• Establish and advocate for best practices in concurrency, memory management, and resource utilization across the backend ecosystem
• Collaborate with cross-functional teams including backend, web, mobile, QA, and product teams
• Take ownership of specific functional areas within our large-scale architecture
• Leverage AI tools and assistants as integral parts of your development workflow—from system design to code review
• Contribute to maintaining high test coverage, predictable production behavior, and seamless scalability
• Drive engineering excellence through modern practices and continuous improvement

What we are looking for
• Deep, low-level understanding of Java internals (JVM, GC behavior, memory management, concurrency/multithreading, and performance profiling)
• Advanced knowledge of relational databases (PostgreSQL), including query optimization, indexing strategies, locking mechanisms, and connection pooling under heavy load and distributed systems architecture, specifically high-throughput event streaming with Kafka (partitioning, replication, consumer group rebalancing, and tuning).
• Strong system design, troubleshooting and debugging capabilities
• Comfortable and proactive in using AI coding assistants (GitHub Copilot, Claude Code, etc.) as productivity multipliers
• Practical experience validating, refining, and taking ownership of AI-generated output
• Upper-intermediate or higher level of English

Nice to have:
• Proven track record of building or maintaining shared libraries, SDKs, or internal tooling in a large-scale engineering organization.
• Hands-on experience with APM tools and observability stacks (Prometheus, Grafana, ELK) with the ability to define meaningful SLOs/SLIs, custom metrics, and proactive alerts.

Main technologies: Java, Spring, Spring Boot, Ebean-ORM, Quartz, Maven, Resteasy, Flyway, PostgreSQL 15, HTTP/Websockets, Netty, K8S/Docker, GCP, Jenkins, ELK, Grafana.

We are helping our partner — a fast-growing product company in the iGaming space — find a Middle Java Developer to join their backend team.

This is a product environment where backend engineering directly impacts platform stability, scalability, and business growth.

You won’t just “close tickets.” You’ll work on real systems, real architecture, and real technical challenges.

What this role is really about

You’ll be working on a high-load platform where:

• systems process real-time events;
• performance and reliability matter daily;
• backend services must scale under heavy load;
• technical decisions affect the whole product ecosystem.

The team builds and develops services end-to-end, with a strong engineering mindset and ownership culture.

What you’ll be doing

• Develop and improve backend services.
• Work with microservices architecture.
• Participate in technical discussions and solution design.
• Solve performance and scalability challenges.
• Collaborate closely with developers, QA, and product teams.
• Support and improve existing services while building new functionality.
• Take ownership of your work and engineering decisions.

What we’re looking for

• 3+ years of commercial experience with Java.

• Strong practical experience with:

   

   

  • Spring Boot;
  • PostgreSQL;
  • Kafka or similar messaging systems.

   

   

• Experience working with microservices.
• Good understanding of distributed systems principles.
• Experience with SQL and NoSQL databases.
• Experience with AWS or Kubernetes will be a plus.
• gRPC — nice to have.

But more importantly:

• You think beyond tasks.
• You can explain your technical decisions.
• You are proactive and structured in your work.
• You care about quality, not only delivery speed.

What you get

• Product company environment (not outsourcing).
• Real impact on the product and technical decisions.
• Strong engineering team and mature processes.
• Complex backend challenges and high-load systems.
• Remote work format.
• Fast-growing iGaming product with global scale opportunities.

About the role 

We're looking for a Strong Middle / Senior Engineer to join a high-impact banking infrastructure migration for one of Europe's financial technology companies. Once the project is completed, you'll continue working on other FinTech initiatives, applying your expertise to other large-scale banking and financial infrastructure projects.

You’ll join a highly skilled team working on real-world challenges with high-load systems, modern cloud-native solutions, and advanced communication protocols. This is an excellent opportunity for someone eager to grow fast and gain hands-on experience with cutting-edge technologies in a demanding but rewarding environment.

Project Highlights

Current focus: migrating a critical Temenos T24 (CBM) core banking system from one client's infrastructure to another.

Business domain: Core Banking & Financial Infrastructure.

Methodology: Agile (Scrum), 1-week sprints, daily stand-ups, regular demos.

Tooling: Bitbucket, Datadog, Slack, Jira, Google Workspace. 

What We’re Looking For:

- Strong, production-level expertise with Java; practical working knowledge of Python for automation and data-reconciliation tooling.

- Solid understanding of message-driven architecture (JBoss Queues or equivalent), including delivery guarantees, idempotency, and error handling.

- Experience with Temenos T24 or another complex core-banking / legacy financial system

- Hands-on experience with Azure. 

- Confident with Bitbucket — git workflows and PR review across two separate client teams at once.

- Practical experience setting up Datadog monitoring and alerting for critical flows.

- Strong debugging skills in distributed systems — comfortable tracing errors across services and queues under time pressure.

- English: Strong Upper-Intermediate or higher — daily live syncs with client team, not just written updates.

Nice to have:

- Prior hands-on experience with Temenos T24 specifically.

- Kotlin experience (for future FinTech projects)

- Experience with other message-driven architectures (Kafka, RabbitMQ).

- Google Cloud certifications.

Why Join FreySoft?

🌍 International team within the EU time zone, flexible schedules.

🚀 Cutting-edge technologies and high-load, real-world challenges.

🎯 Growth-focused culture — grow into leadership, own features, or mentor juniors.

💡 Innovative environment — leverage AI/LLM tools to boost development speed and quality.

💰 Competitive compensation based on experience and skills.

🤝 Collaborative and professional team that values initiative, autonomy, and continuous learning.

We are helping our partner - a fast-growing product company in the iGaming space - find a Senior Java Developer to join their backend team.

This is not a “just write code” role.

This is about building systems, making decisions, and owning the result.

What this role is really about

You’ll be working on a high-load casino product, where:

• systems process real-time events
• performance matters
• architecture decisions have real impact

The team builds services from scratch and owns them end-to-end.

What you’ll be doing

• Build new backend services from scratch
• Participate in architectural and technical decisions
• Work with microservices and distributed systems
• Solve complex technical challenges
• Collaborate in a cross-functional team (product / QA / dev)
• Take ownership of what you build — not just tasks

What we’re looking for

• 5+ years of experience with Java
• Strong experience with microservices architecture (2+ years)
• Deep understanding of distributed systems

• Hands-on experience with:

   

   

  • Spring Boot
  • PostgreSQL
  • Kafka (or similar messaging systems)
  • SQL + NoSQL databases

   

   

• Experience with AWS / Kubernetes will be a strong plus
• gRPC — nice to have

But more importantly:

You think, not just code

You take ownership

You can explain your decisions

What you get

• Product company (not outsourcing)
• Real impact on architecture and product
• Strong engineering team
• Fast-paced environment with real challenges
• Remote work

We are looking for a Devops Platform Engineer to help modernize our infrastructure by containerizing Java services, designing Kubernetes platforms, and building scalable cloud-native environments. This role is focused on platform engineering rather than traditional operations—you will design and implement infrastructure from the ground up, optimize distributed systems, and improve the performance of large-scale data pipelines.

Responsibilities

• Containerize existing Java Spring services using modern container technologies.
• Design, build, and maintain Kubernetes platforms from scratch.
• Develop and improve cloud-native infrastructure and deployment pipelines.
• Investigate, troubleshoot, and re-architect bottlenecks in complex data pipelines.
• Build scalable, reliable, and highly available platform solutions.
• Collaborate with engineering teams to define infrastructure architecture and best practices.
• Optimize system performance, scalability, and operational efficiency across cloud environments.

Required Qualifications

• Strong experience with Java 21.
• Hands-on experience with containerization (Docker or similar).
• Expert-level knowledge of Kubernetes, including designing and building greenfield Kubernetes environments—not just maintaining existing clusters.
• Strong experience with AWS.
• Deep expertise with Oracle Cloud Infrastructure (OCI), including designing and deploying cloud infrastructure from scratch.
• Experience building and operating cloud-native platforms at scale.

• Strong understanding of infrastructure architecture, networking, and distributed systems.

   

Nice to Have

• Experience with Kubernetes ecosystem tools such as Helm, ArgoCD, GitOps, Operators, or similar.
• Knowledge of Kubernetes orchestration and platform automation.
• Experience optimizing autoscaling, resource utilization, and cluster performance.
• Familiarity with monitoring, observability, and performance tuning.

Ideal Candidate

The ideal candidate has a strong Platform Engineering mindset and has built Kubernetes platforms from the ground up. We're looking for someone who can architect cloud infrastructure, improve scalability, and drive platform reliability across AWS and Oracle Cloud Infrastructure (OCI) while supporting the modernization of Java-based services.

We are looking for an experienced Senior Java Full Stack Engineer to join our development team.
 

Our customer – integrated Shipping Services has set itself apart as an independent carrier with a fresh, unique approach. His strategy as a global niche carrier offers distinctive advantages to customers worldwide. We have created a smart, efficient network that ensures stable, reliable services, and we have made it our mission to focus on the needs of our customers, which stand at the heart of all our decisions. The main idea of our product operates in select trades, where it has a competitive advantage and where it can provide superior service. We maintain a flexible partnership approach with other major carriers, and our new line structure is a much-needed alternative to customers concerned about the current alliance-dominated market.
 

Responsibilities:

• Hands-on full-stack development of innovative applications
• Owning the entire development cycle, including design, architecture, development, and DevOps
• Working in XP with Remote pairing
   

Requirements:

• BS degree in Computer Science or equivalent combination of education and experience
• 5-6+ years of full-stack development
• 5-6+ years of experience in the following technologies: Java, Spring
• Experience with Functional Programming and Java Streams
• 2+ years of experience in front-end development with React
• Experience with developing a reactive UI (Reactive JS)
• 2+ years of experience in TDD/BDD development in the following frameworks: Junit, Jasmin, Mockito, Protractor/Selenium
• 2+ years of experience in micro-services-based architecture and tools (Spring Boot/Cloud)
• Experience in DevOps development and Jenkins
• Experience in development in Kotlin – an advantage
• Experience in designing, developing, and deploying cloud/hybrid-based solutions
• Experience in developing and deploying in container-based environments (Kubernetes, Cloud Foundry)
• Familiarity with the following design concepts: micro-services, service discovery, circuit breaker
• Self-starter with the ability to appropriately prioritize and plan complex work in a rapidly changing environment
• Versatility and the capability to switch easily between different tasks and technologies
• Experience in assessing a broad range of information solutions and products
• Strong critical thinker with problem-solving aptitude
• Good English - verbal and written

Job Description

Job Description

• Minimum of 4 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 is required
• 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

Develop highly scalable, reliable web scale applications, tools, and 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. 

Responsibilities:

• Work in SCRUM team 
• Design and develop high-load microservices
• Produce high-quality code covered with different levels of tests
• Maintain services on production and assure their stability and performance
• Provide code review for teammates 
• Contribute to the Company’s development processes and practices 

Requirements:

• 5+ years of professional Java development experience, including at least 2 years in a product company or product-focused environment
• Proficiency in Java 17+ and modern backend development practices
• Solid experience with the Spring Framework and Spring Boot
• Practical experience designing and developing microservices
• Experience with MySQL, Redis, and other SQL or NoSQL databases
• Experience with Kafka and event-driven architectures
• Experience building REST APIs and working with Protobuf
• Hands-on experience with SQL and database schema design
• Experience with CI/CD practices and tools such as GitLab CI
• Ability to write unit and integration tests using tools such as Mockito, WireMock, and Testcontainers
• Strong understanding of SOLID principles, clean code, and common software design patterns
• Experience with Git and modern software development workflows
• Excellent troubleshooting and problem-solving skills
• Good communication and collaboration skills
• English proficiency at Intermediate level or higher

AI-enabled software development

• Hands-on experience using AI coding agents in day-to-day software development.
• Ability to break down engineering goals into clear, well-scoped tasks for AI agents.
• Ability to provide effective context, constraints, acceptance criteria, and validation steps.
• Strong awareness of the risks and limitations of AI-generated software.
• Ability to distinguish where AI can accelerate delivery and where human judgment is essential.
• Interest in exploring and improving agentic development workflows.
• Willingness to share effective workflows and lessons learned across engineering team.

Would be great to have:

• Experience with Aerospike
• Experience with Spring Cloud
• Experience with Docker and Kubernetes
• Experience developing and operating high-load distributed systems
• Experience with Google Cloud Platform (GCP) and its core services, including BigQuery

What we offer:

• International company with several offices in different locations : Tel-Aviv, Kyiv, Warsaw, Limassol.
• Granting an Option;
• A professional environment with great people to work with;
• Competitive salary, performance review;
• Flexible working hours, no one here tracks your work time because our culture is built on trust and cooperation;
• Social and welfare packages;
• 20 working days paid vacation, official public holidays and 100% sick leave coverage;
• Opportunities to make a difference, to develop and grow;
• Regular corporate celebrations, team building and fun activities;
• Comfortable office in the city center. Our Kyiv office is open 24/7 with all safety and health measures in place.

Join our Security and Compliance group as a Senior Software Engineer, where you'll work with a team of skilled developers on the client's complex core product, utilizing cutting-edge technologies such as Microservices, Spring Boot, Java, Kotlin, Reactive Programming, MongoDB, Neo4j, Kafka, and more.

Role and Responsibilities:
 - Participate in the end-to-end development lifecycle of new features used by thousands of enterprise customers globally.
 - Design, develop, and maintain robust and scalable Java applications.
 - Build and manage REST or GraphQL APIs.
 - Integrate and optimize NoSQL database solutions (e.g., MongoDB, Neo4j).
 - Collaborate with cross-functional teams to define requirements and deliver high-quality solutions.
 - Conduct code reviews to ensure adherence to high-quality standards and best practices.
 - Troubleshoot software issues and optimize performance in customer environments.
 - Engage in the full software development lifecycle, including requirements analysis, design, coding, testing, and deployment.
 - Stay current with emerging technologies and industry trends.
 - Work independently and within an Agile team to design and maintain network security orchestration software solutions.

Requirements:
- 3+ years of professional experience in Java development within a Linux environment.
- 2+ years experience with spring boot framework
- Willingness to code in Kotlin.
- Familiarity with front-end technologies, with an openness to learning frameworks like Angular and Apollo.
- Strong understanding of Spring Boot and experience with NoSQL databases (e.g., MongoDB, Neo4j).
- Proficient in data modeling and designing scalable data architectures.
- Basic knowledge of Docker and Kubernetes.
- Experience with Agile/Scrum development methodologies.
- Strong problem-solving skills, attention to detail, and ability to collaborate effectively.
- Excellent verbal and written English-language communication skills

Nice to have:
Background in networking or security software solutions.
Experience with front-end frameworks, preferably Angular 15+.
Familiarity with DevOps CI/CD methodologies and tools